950.703.01 General Descriptive Information Issue 1, September, 1957 AT&Tco Standard ( ) SCHEMATIC SYMBOLS for (J ATTACHED-CONTACT DRAWINGS

BELL SYSTEM PRACTICES SECTION 950.703.01 General Descriptive Information Issue 1, September, 1957 AT&TCo Standard ( ) SCHEMATIC SYMBOLS FOR (J ATTACHED-CONTACT DRAWINGS

CONTENTS PAGE (c) Detached-contact tYPe schematic drawings shall conform with Section 950.701.01. l. GENERAL . (d) Section AA612.001, A804.009 covers wir 2. SYMBOL COMPONENTS 2 ing symbols, wiring abbreviations, and definitions for wiring and cabling. A. Attached-contact Schematic Symbols • 2 1.02 Changes in requirements which have been B. Detached-contact Schematic Symbols . 6 made with this issue are explained under reason for reissue at the end of the section. Since 3. PRIMARY WIRING SYMBOLS . 7 this reissue covers a general revision, _arrows or dinarily used to indicate changes have been 4. COMPLETE APPARATUS SYMBOLS . 9 omitted. 1.03 The schematic symbols shown herein are 5. COAXIAL AND WAVEGUIDE SYMBOLS. 34, designed to indicate the electrical function of the apparatus. REASON FOR REISSUE 39 1 .04 The standard symbol for a terminal ( o) ( ) AlPHABETICAL INDEX 40 may be added to each point of attachment of conductors to any one of the graphical symbols, but such added terminal symbols should not be 1. GENERAL considered as part of the individual graphical 1.01 This section was previously numbered Sec- symbol itself. tion AA612.016, A804.002, and also re 1 .05 Each symbol shown in this section is the places Section B804.002. Iteovers schematic sym size actually used on the original schematic bols specifically used in the preparation of Bell drawing. The sizes of symbols shown on prints in System attached-contact type schematic drawings. the field may be shown smaller due to print re When symbols -not listed in this section are re duction. quired, the matter shall be referred, through 1.06 The orientation of a symbol on a drawing normal lines of organization, to the Bell Telephone does not alter the meaning of the symbol. ) Laboratories, Incorporated, New York, N. Y. In most cases, apparatus symbols may be rotated (Standards Engineer - Dept 5241) for the estab or· reversed in order to simplify the circuit lay lishment of new symbols. out. Exceptions to this are made in the case of symbols which require a definite position in order (a) Other symbols not necessarily applicable :.I to identify the top, bottom, left, or right side of to Bell System drawings may be found in the apparatus. In such cases, the symbol is con "Graphical Symbols for Electrical Diagrams sidered as looking at the wiring side. Y32.2" prepared by the American Standards \ _) Association for use in the electrical industry 1.07 Functional or reference designations of ap- generally. paratus are placed at some point near the apparatus. Code designations include the appara (b) Cabling diagrams for schematic drawings tus name only when required to insure complete shall conform with Section AA610.004. understanding.

A. A.

SECTION SECTION

ticular ticular

Page Page tion. tion.

2.03 2.03

indicated indicated

2. 2. revised revised

2.02 2.02

2.01 2.01

new new

point point

(b) (b)

(d) (d)

(a) (a)

SYMBOL SYMBOL

Attached-contact Attached-contact

the the

Note: Note:

schematic schematic

(NO) (NO)

(2) (2)

(1) (1)

Symbols Symbols

2 2

Contact Contact

nonlocking nonlocking

Moving Moving

The The the the

System System

Symbol Symbol

Moving Moving

Normally Normally Fixed, Fixed,

fea,tures fea,tures

0 0

and and

0 0

to to

position position

950.703.01 950.703.01

Normally Normally

as as

general general

conform conform

symbol symbol

or or

Whether Whether

is is

Discontinued Discontinued

COMPONENTS COMPONENTS

adjustable, adjustable,

normally normally

always always

used used

applications applications

contact contact

drawings. drawings.

components components

v v

contact contact

of of

closed closed

keys, keys,

components components

the the

a a

methods methods

open open

closed closed

previously, previously,

0 0

Schematic Schematic

0 0

with with

piece piece

a a

shown shown

OR OR

for for

(DISCONTINUED) (DISCONTINUED)

contact contact

and and

(DISCONTINUED) (DISCONTINUED)

etc etc

contact contact

closed closed

or or

(make) (make)

or or

t t

present present

and-

locking locking

' '

(break) (break)

~ ~

of of

~ ~

are are

normally normally

that that

armature armature

(circle (circle

sliding sliding

of of

on on

apparatus. apparatus.

Symbols Symbols

when when

will will

listed listed

(NC) (NC)

found found

representing representing

moving moving

is is

which which

are are

contact contact

keys, keys,

standards, standards,

indicates indicates

normally normally

not not

contact contact

contacts contacts

the the

open open

used used

herein herein

depends depends

in in

for for

be be

have have

actuating actuating

contacts) contacts)

jacks, jacks,

this this

(NO) (NO)

used used

contact contact

in in

relays, relays,

(NC) (NC)

pivot pivot

show show

open open

been been

par-

Bell Bell

sec

are are

etc etc

on on

· ·

2.08 2.08

2.07 2.07

2.06 2.06

2.05 2.05

2.04 2.04

(b) (b) (a) (a)

(a) (a)

(b) (b)

device device

position. position.

---J\fV\r-

~~ ~~

Transistor Transistor

ohmic ohmic

Inductance Inductance

Thermal Thermal

base base

Core Core

Heating Heating

ponents ponents

Transformer, Transformer,

Semiconductor Semiconductor

Core, Core,

Core Core

is is

region, region,

for for

magnetic magnetic

contacts contacts

in in

Resistor Resistor

(See (See

Element Element

relays, relays,

the the

(Semiconductor (Semiconductor

with with

4.17 4.17

etc etc

de-energized de-energized

T T

region region

Repeating Repeating

region, region,

(general) (general)

magnets, magnets,

(DISCONTINUED) (DISCONTINUED)

one one

(See (See

(DISCONTINUEDl (DISCONTINUEDl

and and

.....rul..r-

(DISCONTINUED) (DISCONTINUED)

ohmic ohmic

with with

4.65) 4.65)

4.12) 4.12)

for for

etc etc

Coil, Coil,

or or

Devices) Devices)

a a

contact contact

example example

nonoperated nonoperated

plurality plurality

Inductor, Inductor,

Com

the the

of of

• •

) )

) ) ) ) SECTION 950.703.01

) (c) Transition between p and N regions (k) Plurality of collectors on semiconductor (either P toN or N toP) region _L_ ..L_ )

I (l) P-region rectifying junction

OR (d) Intrinsic region between regions of similar conductivity type

I I \ \ (m) N-region rectifying junction ') ~ ~ OR j_ (e) Intrinsic region between regions of dissim- ilar conductivity type (n) Notes ~ ~ (1) Slant lines indicating transitions shall be appreciably shorter than collector and emitter lines. Note that the transition is along the horizontal line and that no ohmic connection is made at the slant line. See 4.65(i), (k), and (p) as examples. (f) P-emitter on N-region (2) The circle enclosing the device symbol is for recognition purposes and its use is recommended. ( 3) The following more generally used device properties may b~indicated with the (g) Plurality of P-emitters on N-region aid of identifying letters placed adjacent or within the enclosure. , B - Breakdown device -r - Storage device T - Thermally-actuated device .\ - Light-actuated device (h) N-emitter on P-region It is recognized that all semiconductor de ) vices are light- and temperature-sensitive, \__ and that they exhibit breakdown and storage characteristics. However, these letters are to (i) Plurality of N-emitters on P-region be used only if these properties are essential to the operation of the circuit. • 2.09 Tube, Electron Components (See 4.67) (a) Collecting electrode ) (1) Anode or plate (including collecting elec (j) Collector on semiconductor region trode and fluorescent target) _j_ 1

Page 3 SECTION 950.703.01

(2) Target or X-ray anode (4) Excitor (contactor type) Drawn at about a 45-degree angle.

(e) Coupling (See 5.04) ( 1) Coupling by loop (electromagnetic type) (b) Collecting and emitting electrode Coupling loop may be shown inside or outside envelope desired, inside (1) Dynode as but if it should be shown grounded. ± (c) Alternately collecting and emitting (f) Emitting electrode ( 1) Composite anode - photocathode (1) Directly heated (filamentary) cathode .Leads may be connected in any conven ient manner to ends of the A provided the identity of the A is retained.

(2) Composite anode- cold cathode

Note: A diagram for a tube having more than one heater or filament shall show only ) one heater or filament symbol A unless they have entirely separate connections. If a (3) Composite anode - ionically heated heater or filament tap is made, either brought cathode with provision for supplemen~ tary heating out to a terminal or internally connected to another element, it shall be connected at the vertex of the symbol, regardless of the actual division of voltage across the heater or fila ment. (d) Controlling electrode (2) Indirectly heated cathode (1) Grid (including beam-confining or beam forming electrodes) Lead may be connected to either extreme end of the r--, or, if required, to both ends, in any converlierit manner. (2) Deflecting electrodes (used in pe.irs) ; reflecting or repelling electrode (used in velocity-modulated tube) (3) Cold cathode (including ionically heated ---<( cathode)

(3) Ignitor (in pool tubes) (should extend --o into pool) ) ( 4) Photocathode Starter (in gas tubes) --( )

Page 4 is

that

electric

and

connected

950.703.01

fields

grid-type grid-type

against

anode

that

and

SECTION

noted.

electric

and

shield

type)

terminal

envelope

magnetron

against

envelope

otherwise

(cavity

electrodes

the

shield

understood

unless

independent

Any

Single-cavity

within

Double-cavity

sociated

Multicavity

sociated

velope

Resonators

This fields

Shield

(1)

(2)

(3)

(h)

(i)

the

may

sym

other

evacu

provision

split.

device

identifies

electron-tube

unless

convenient

envelope

with

may

with

the

electron

regardless

symbol

heating

general

used

cathode

enclosure

located

within

the

envelope

dot

When

gas-filled

envelope

enclosure

heated OR

vacuum

(shell)

may

envelope cathode

symbols,

dot

supplementary

necessary,

general

pressure.

Pool

Ionically

for

General Split

Gas-filled

The

specified.

Envelope

The

envelope

5) indicates

indicated

(

(1)

(2)

(3)

(g)

ation component be bol wise bol.

}

)

( SECTION 950.703.01

(2) Outside envelope (c) Inner end for windings of relays, electro magnets, etc

B. Detached-contact Schematic Symbols

Note: The following are the basic symbols · (3) Shield sleeve [Also see 4.67 (e)] used on detached-contact schematics. For complete information on this type of sche matic, see Section 950.701.01.

2.12 Make

2.10 Variable, when used with normal symbol ) for capacitor, etc [See 4.08(b) and (c) )( and 4.12(b) (3), (4), and (5)]

/ 2.13 Break

2.11 Windings (a) Inductive winding for relays, electromag t nets, etc )

2.14 (;ore and Winding (b) Noninductive winding ) s (OISCONTINUEOl + )

Page 6 950.703.01

wire

SECTION

twisted)

wires

•

2W !

4TW

cross-connection

pairs

(two

uctor -~-*---

twist

!-conductor

2-cond

3-conductor

Quad

4-wire

Cross-connection

(

(1)

(

(c)

(e)

{d)

•

------

'·

SYMBOLS

wires

FEED

DWGS

Conductors

USED

PATHS

POWER

twisted

LINKAGE GROUPING

BATTERY

GROUND

twisted

TELEGRAPH)

WIRING

LEADS

Symbols

LINE

SWITCH &

OTHER

FIGURES

CONNECTIONS

CHARGE

MAGNETIC

Triple_

Paired

Line

Associated

BAR

PIIIMARY

SHIELDING

(b)

(a)

(TALKING

BOUNDARY

FUNDAMENTAL.CIRCUIT

& ROTARY

BUS BETWEEN

SIGNALING SYMBOLS MECHANICAL TRANSMISSION DIVISION DISCHARGE

OFF-NORMAL CIRCUIT OFF-NORMAL SHOWN CROSS-CONNECTION MECHANICAL

SEQUENCE CONTROL WIRE

3.01

3.02

)

(

SECTION SECTION

Page Page

(f) (f)

(g) (g) (h) (h)

(5) (5)

(4) (4)

8 8

Cable Cable

Local Local

Cable Cable

ral) ral)

9~0.703.01 9~0.703.01

4-conductor 4-conductor Multiple Multiple

0: 0:

switchboard switchboard

coaxial coaxial

cable cable

-- --

twin twin

or or

LC LC

(Also (Also

cross-connection cross-connection

loose loose

4W 4W

......

""' ""'

cross-connection cross-connection

(DISCONTINUED) (DISCONTINUED)

LW LW

y y

.!,_ .!,_

, ,

-,- T-

-*--

~ ~

p p p p

see see

wiring wiring

5) 5)

wire wire

(spi-

3.03 3.03

(b) (b)

(a) (a)

(j) (j)

(i) (i)

Leads Leads

Methods Methods

connected connected

Leads Leads

control, control,

Wires Wires

Individually Individually

Single Single

D( D(

GROUND GROUND

EARTH EARTH

·-· ·-·

' '

in in

run run

requiring requiring

/u /u

shielded shielded

r r

l l

I I

I I I I

I I

etc etc

of of

) )

same same

together together

from from

Shielding Shielding

WIRE WIRE

METHOD METHOD

NUMBER NUMBER

shielded shielded

AS AS

OR OR

I I

......

·r ·r

'"u '"u .JI'ORRU .JI'ORRU

, ,

' '

TO TO

shield shield

~ ~

su su

\ \

wire wire

\ \

' '

OR OR

terminal terminal

segregation segregation

CHASSIS CHASSIS

REQUIRED REQUIRED

c c

U,EU U,EU

u u

to to

wires wires

TO TO

OF OF

ground ground

SHOW SHOW

RUNNING RUNNING

to to

with with

, ,

't' 't'

.-, .-,

......

terminal terminal

u u

~ ~

I I

for for

.~ .~

\ \

the the

crosstalk crosstalk

shields shields

) )

1 1

) )

') ')

) ) ) )

9 9

Page Page

950.703.01 950.703.01

SECTION SECTION

shown shown

(DISCONTINUED} (DISCONTINUED}

~YMBOLS ~YMBOLS

are are

leads leads

APPARATUS APPARATUS

more more

line line

Where Where

Counterpoise Counterpoise

Single Single

Aerial Aerial

Loop Loop

Antenna Antenna

Amplifier Amplifier

COMPLETE COMPLETE

(b) (b)

(a) (a) (c) (c)

(a) (a)

(b) (b)

4.02 4.02

4.01 4.01

4. 4.

u u

. .

' '

r r

I I

J. J.

\ \

,-, ,-,

'r' 'r' . .

UORR UORR

......

(" ("

wiring wiring

") ")

......

I I

paths paths

shielded shielded

I I

I I I I

I I

,4, ,4,

,-, ,-,

.,, .,,

-/' -/'

and and

)( )(

/unctions /unctions

<•® <•®

UORRU UORRU

®1 ®1

SPLICE SPLICE

alternate alternate

+ +

Path Path

connection connection

or or

P P

! !

T T

paths paths

pai:ed pai:ed

wires wires

paths paths

and and

RU RU

REQUIREP REQUIREP

CHASSIS CHASSIS

\ \

I I

.. ..

I I

r r

, ,

\ \

I I

TO TO

,-, ,-,

\ \

AS AS

OR OR

Multiple Multiple

Typical Typical

Crossed Crossed

Joined Joined

Optional Optional

Spliced Spliced

Paths Paths

UOR UOR

(d) (d)

(a) (a)

(e) (e)

(b) (b)

EARTH EARTH

3.04 3.04

GROUND GROUND

) )

l l

) )

( ( ( ( SECTION 950.703.01

4.03 Autotransformer (See 4.12) (b) DC bell 4.04 Batteries and Potential Supply (a) One cell OR 1 1 T T (c) AC-DC bell (DISCONTINUED) A

(b) Multi cell battery OR (showing positive side grounded) 1 INDICATE l VOLTAGE-- 1 I _I1 ~ .&. - . - I< l I I I 4.06 Binding Post '-(DI SCONTINUED1-'

PagelO

11 11

Coil, Coil,

Page Page

950,703.01 950,703.01

Transformer Transformer

Induction Induction

breaker breaker

(LINE) (LINE)

Coil, Coil,

I I

SECTION SECTION

5 5

Speed Speed

circuit circuit

Speed Speed

o----

~ ~

:L :L

Low Low

...-t....: ...-t....:

High High

type type

~ ~

0 0

Repeating Repeating

=L =L

.. ..

Autotransformer, Autotransformer,

LS LS

HS HS

switch switch

Magnets Magnets

----oo ----oo

Electric Electric

2.06) 2.06)

Adjustable Adjustable

Autotransformer Autotransformer

Toggle Toggle

Inductor, Inductor,

Application Application

Coils Coils

Clutch Clutch

Clock, Clock,

see see

(1) (1)

0 0

(a) (a)

(b) (b)

(a) (a)

+++++ +++++

(Also (Also

4.12 4.12

4.1 4.1

4.11 4.11

a a

the the ad

the the

and and

out

note note

4.08.) 4.08.)

and and

indicate indicate

the the

variable variable

negative negative

4.08) 4.08)

(see (see

to to

appear appear

drawing, drawing,

under under

trimmer trimmer

identify identify

and and

the the

under under

to to

note note

symbol symbol

circuit circuit

should should

represents represents

capacitors, capacitors,

(DISCONTINUED) (DISCONTINUED) capacitor capacitor

@ @

note note

capacitor capacitor

see see

a a

identify identify

--tlt-l

(DISCONTINUED) (DISCONTINUED)

T T

o-----

the the

to to

on on

adjustable adjustable

4-.08) 4-.08)

at at

required required

(DISCONTINUED) (DISCONTINUED)

(See (See

capacitors, capacitors,

NOTE NOTE

fixed-paper-dielectric fixed-paper-dielectric

(Also (Also

.....--...... --...

in in

is is

element element

letter letter

in in

variable variable

capacitor capacitor

it it

adjustable adjustable

(SEE (SEE

electrolytic electrolytic

placed placed

UNDER UNDER

the the

or or

necessary necessary

symbol. symbol.

Breaker Breaker

be be

electrodes electrodes

in in

----~o ----~o

capacitor capacitor

curved curved

4.08) 4.08)

,/ ,/

element element

is is

When When

T T

the the

REQUIRED) REQUIRED)

it it

electrode electrode

the the

shall shall

to to

Electrolytic Electrolytic

Variable Variable

Fixed Fixed

Differential Differential

Circuit Circuit

under under

If If

pacitors, pacitors,

Capacitors Capacitors

~f:-

capacitor capacitor electrode electrode

ceramic-dielectric ceramic-dielectric

that that

note note

moving moving

side side capacitors. capacitors.

Note: Note:

(WHEN (WHEN

(d) (d)

(b) (b)

{c) {c)

(a) (a)

jacent jacent

4.09 4.09

4.08 4.08

) )

) ) / /

Page Page

SECTION SECTION

(b) (b)

J J

(2) (2)

(1) (1)

(2) (2)

(3) (3)

12 12

l:~1duction l:~1duction

950.703.01 950.703.01

With With

Load-ratio control control Load-ratio

Application Application

(Variable (Variable

i,:[ i,:[

•s •s

magnetic magnetic

coil, coil,

OR OR

tap-tyPe tap-tyPe

repeating repeating

---+--_b-

core core

(OISCONTlNUED) (OISCONTlNUED)

CORE CORE

SHIELD SHIELD

INTERNALLY INTERNALLY

3 3

autotransformer autotransformer

autotransformer) autotransformer)

and and

-~~rr

coil, coil,

AND AND

shield shield

4 4

CONNECTED CONNECTED

s s

transformer transformer

CASE CASE

TO TO

(8) (8)

(7) (7)

(6) (6)

(5) (5)

( (

(3) (3)

4) 4)

taps taps

Induction Induction

Load-ratio Load-ratio current current

able able

With With

Adjustable Adjustable

Each Each

Adjustable Adjustable

inductance inductance

_}r _}r

taps taps

winding winding

transformer transformer

coil coil

inductance inductance

control control

mutual mutual

with with

__ __

RBK RBK

inductor, inductor,

transformer transformer

separately separately

winding winding

BL BL

constant

adjust

with with

) )

) ) ) ) SECTION 950.703.01

( l (9) Repeating coil (12) Repeating coil with noninductive wind ing

2 4 "") 2 4 JL ~~LRIRI 3 3R ~1 3 f 6 8 6

:~f (DfSCONTINUEOl JlRJr 7 5 7 (DISCONTINUED) See 2.11 (b) For Previousfy Used Noninductive Winding (10) Repeating coil (hybrid-type) (13) Repeating coil with taps 2

(14) Saturable reactor 2 6 3 ( 11) Transformer with electrostatic shield

4 2 5 4 ]if (c) Inductor 3 I 8 6 ~,if J 7 1 5 (1) With magnetic core I I 7 5 6s s (DISCONTINUED)

I J J

Page 13 SECTION

4.13

Page

(a)

Note: symools.

(6) (3) (2) ( (

5) 4)

Connectors

male

Separable

950.703.01

Application With

Adjustable Continuously

Shunt

Use contacts

taps

inductor

appropriate T

connectors

inductor

engaged

{DISCONTINUED)

adjustable

showing

number

(See

inductor

note}

female

contact

and

(b)

when

(2) (1)

(3)

(1) 1 1

(1)

plugs)

Switchboard-type

Coaxial

showing

Engaged Single Connector Complete

2-conductor

required

)--L-

r-DISCONTINUED\

connectors

line

individual

REPEAT SEPARATED

coaxial

multiple

showing (See

coaxial

2 o---1\

jack

note)

connectors

1)3 I 1)2 I I I

NUMBERS

jack

)

conductor discontinuity

contact

D I

4 4

and

THE

WHEN

designations

plug

2)~~---·

3)')._...jl~

(jacks

1))...._,-

DRAWING

connector >~I~.--

symbol

I I

MATES

and

ARE

) )

)

) SECTION 950.703.01

(2) 2-conductor plug (9) Test-type jack A~~ v 03 ) A o4 (3) 3-conductor jack y--

2 A os ~"-----<>2 n ~ ~2 L-.-o4 (10) Spring-type jack and plug (engaged) I ~3 u~I 5 n .V - U"---o5 3 ( 4) 3-conductor plug I TIP ~ I 0 ~'RING (11) Test plug SLEEVE ( 5) Make-busy or shorting plugs o--,- 0 I I ( 6) Dummy plug~ (OISCONTINUEO) ~ (12) 4-finger plug (7) Twin-type jacks

)

(8) Twin plug (d) Connectors commonly used for power sup KNURLED ply (convenience outlets and mating con END nectors) ,/ (1) 2-conductor nonpolarized (female con ) tacts) ~ I ~ ---+-@~·- ) COISCONTI NUEO)

Page 15 SECTION 950.703.01

(2) 2-conductor nonpolarized (male con (9) 3-conductor grounding-type polarized tacts) (female contacts)

(GRD) (GRD) )

(3) 2-conductor polarized (female contacts) ~~R~ (10) 3-conductor grounding-type polarized ( 4) 2-conductor polarized (male contacts) (male contacts) )

~o~R !GRDlo~~-~- (GRD) (GRD)

(5) 3-conductor polarized (female contacts)

(G~OR~ (e) Cord tip-type connector -----<( ) ) (6) 3-conductor polarized (male contacts) FEMALE TYPES MALE TYPES (SPRING CLIP SPADE) (CORD TIPS) ,....----(DISCONTINUED)--- (GRD} OR~)

(7) 4-conductor polarized (female contacts!

(GRD) ) OR 4.14 Contactors (a) Relay (armature) -type

(8) 4-conductor polarized (male contacts)

(GRD) ) OR

fDISCONTINUED) )

Page 16 17

Page

950.703.01

SECTION

drop

limiter

restored

breakdown

restored

voltage

triode

diode

diode,

P-N

P-1-N

Bi-polar

Electrically

Manually

P-1-N

Drops

f~lectromagnet

(c)

(b)

(d)

(e)

(b)

(a)

4.18

4.19

(Also

Flow

Points

Devices)

Current Arrow

4.68)

Crystal

~Direction

and

DISCONTINUED\

(Semiconductor

4.65,

Units

Detector

(DISCONTI-NUED)

diode

2.08,

Solenoid-type

Piezoelectric

P-N

Crystal

Dials see

Diodes,

(b) (a)

(a)

4.15

4.16

4.17

) 4.20

SECTION

4.21

Page

With

(a)

connected

Note:

planation

Engine-Generator

Fuses

Starting

Fuse

Starting

950.703.01

---&---

MAGNETOS

(DISCONTINUED)

MAGNETOS

When

(no

and

alarm)

power

Motor

are

fuse

not

bus

Set

blows,

and

part

Magnetos

Letters

Magnetos

Charging

alarm

Charging

the

Shunt

symbol.

are

~F2

Shunt

bus

F2 Fl

for

Generator

Type

4.22

4.23

(b)

(c)

(d)

(a) (SEE

(b)

LOAD Alarm-type

Alarm-type

Generator,

Grou~d

Fuse

Chassis

Earth

NOTE)

ground

(DISCONTINUED)

Symbols

safety-type

Hand-type

J'1_ fuse

frame

fuse

U)ISCONTINUED}

j_ ~

ground

(SEE

bus

holder

B~A

LOAD

bar

NOTE)

)

') A

.19

for

bus

are

specific

Page

symbol.

example:

950,703,01-

the

alarm

the

For

Letters

SECTION

identify

part

LINE

4.34)

SYMBOL

operates meter.

coil

bus

not

(See

Meters

coil

GROOND

heat

are

unit

power

factor

and

PART

heat

time

and

FRAME

Howler

(DISCONTINUED)---

NOT

Milliammeter

instrument Watt-hour

Microammeter

Volt-ammeter

Ampere-hour

Volume

Power

or Volt-ohm Decibel

Total

When

abbreviations

Watt

----=-----<0

Galvanometer

Frequency Ammeter

Voltmeter

r--

A -

Protector-type

connected

Horn Instruments

type F -

A- W- AH MA WH PF DB- U VU

G - vo- TT V VA

Note: is explanation

*Show

(b)

4.27 4.28

push-to-talk

4.43)

bar

see

bus

with

(Also

(DISCONTINUED)

coil

(DISCONTINUED)

DISCONTINUED).

NOTE)

(

handset

/--,

LOAD

handset

heat

(SEE

Operator

~0:=

(DISCONTINUED)'\

Coils

,---

4-conductor

3-conductor

Alarm-type

4-conductor

switch

Headset, Handsets

Heat

(b) (a}

(c)

(a)

4.24

4.25 4.26

)

~\.

)

( SECTION

4.29

4.31

4.30 Page

(a)

2()

Keys

Interrupters Jacks

Meter

Ringing

Locking

0 0 o

950.703.01

+ +,

•I +V+f

••

*·

11+-

[See

F 8

shunt

Motor-driven

interrupter

lever-type

4.13

(c)]

(DISCONTINUED)

key

=illv

jn"

Type

(b)

(c)

(d)

Half

Nonlocking

Jack-type

J}:

,-(DISCONTINUED)~

lever-type

.i:

tO.

"i'

key

•+

lever-type

:i +

••

LLo

••

•

key

(DISCONTINUED)

(: lit

key

normally

•

operated

)

21 21

(See (See

+DE +DE

+CD +CD

+BC +BC

+FG +FG

+AB +AB

+EF +EF

note) note)

Page Page

950.703.0·1 950.703.0·1

fi fi

~ ~

§ §

(See (See

® ®

CD CD

@ @

(!) (!)

(g) (g)

@ @ @) @)

G) G)

'® '®

BC BC

diagrams diagrams

+AB +AB

+ +

Caps Caps

SECTION SECTION

TS TS

A A

l:1 l:1

Cap Cap

YX YX

diagrams diagrams

+xw +xw

+ZY +ZY .VT .VT

+WV +WV

keytop keytop

lamp lamp

Lamp Lamp

§ §

L L

keytop keytop

rr rr

Unit Unit

G)~ G)~

®~ ®~

e?~ e?~

~® ~®

@69 @69

Key Key

Lever-type Lever-type

Push-button-type Push-button-type

note) note)

§ §

H H

LRP LRP

FEMF FEMF

RCCJ RCCJ

1000 1000

(a) (a)

(b) (b)

keytops keytops

within within

key key

LOCKING LOCKING

(DISCONTINUED) (DISCONTINUED)

designations designations

LOCKING LOCKING

engraved. engraved.

NOH NOH

Diagrams Diagrams

Show Show

when when

Selector-type Selector-type

Plunger-type Plunger-type

Telegraph-type Telegraph-type

Kl•ytop Kl•ytop

only only

Note: Note:

(e) (e)

(f) (f)

(g) (g)

4.32 4.32

/ / ) ) SECTION

4.33

Page

Y__..X

keys)

(c)

(b) (a)

(d) (c)

(d)

RES-R BALLAST-S

RES-R

BALLAST-S

Lamps

Turn

Illuminating-type

Single-filament

Selector Double-filament (other

Switchboard-type

950.703.01

button-type

than

switch-type

\.0

z y

Western

(DISCONTINUED)

.__.

(DISCONTINUED)

ballast

keytop

lamp

DISCONTINUED)

(DISCONTINUED)

keytop

Electric.

diagrams

resistance

diagram

Company,

lamp

4.34

binations part

(a) (e) (b)

--r8H--

*TR

!PM *LS tMG *HN tEMN *HW

!EM

Loudspeaker,

ceiver

parts

Glow-type

If General

AC-TYPE

the

specific

-Howler -

- -

-Telephone - -Electromagnetic -Horn

may

(DISCONTINUED)\

(Tone

symbol.

coil

coil Permanent tified) and Electromagnetic Loudspeaker

required,

Magnetic

(moving

lamp

identification

leads neutralizing

Ringer)

Horn,

added.

coil

the

armature

(DISCONTINUED)

should

receiver

~@t--t--

Howler,

magnet

The

following leads

DC-TYPE

winding

with with

should

(tone-ringer)

and

Telephone

identified)

with

loudspeaker

moving

letter

(moving

are

moving

iden

com

coil

not

) )

)

) as

for

the

used

with

defini

contact

used

table

Page

used

as a

protection

950.703.01

The

used

network

when

l---,

used

with

connection

code

contact

SECTION

number

coded

when

31)

~--~--0

protection.

network contained

same

used

(DISCONTINUED)

starting

NOTE1

same

used

NOTE-----~

the

different

network

The

contact

4.13)

when

(DISCONTINUED

---ITI]:::

protection

vv~

(SEE

number

number,

each

4-terminal

networks

type

(See

...,....--

~AA__j(

the

for

circuit.

network

,----

3-phase

3-terminal

protection

contact

cireuit.drawing.

~OR

the

Networks

Typical

Networks

Plugs

'----SEE

(2)

(1)

(2)

tion signed

built-up

Note: in

each the circuit.

(b)

(a)

4.39

4.40

motor

(DISCONTINUED)

(OISCONTINUEQ)

4.28)

motor

@[ (DISCONTINUED)---,

(See

induction-type

shunt

2-phase

~OR

AC DC

Message

Meters

Microphone

Motors

,__

(1)

(a) (b)

4.35

4.36 4.37

4.38

) SECTION 950.703.01

4.41 Potentiometers 4.46 Regulator Note: CW indicates position of adjustable ROTATING FIXED contact at the limit of clockwise travel viewed CONTACT CONTACT from knob or actuator end, unless otherwise indicated. ) * (!) ~ 30R2 30R2 --

(SEE HOTE) ( DISC~ON_TINUEO) 4.47 Relays (Also see 4.14) Note: When relay symbols, showing top and 4.42 Protector Blocks bottom springs are rotated 90° on a drawing, the word top shall be placed in appropriate position. Show abbreviations as follows for specific operating features, if required. On polarized relays used in telegraph circuits, the desig nations S and M indicate the "spacing" and "marking" contacts, respectively. 4.43 Receivers (Also see 4.24, 4.25, and 4.34) AC - Alternating current (a) General D - Differential DB - Double-biased - biased in both directions ) lr )1 DP -Dashpot EP - Electrically polarized (DISCONTINUED ) FO - Fast operate FR - Fast release 'b) Double headset receiver MG - Marginal NB- No bias NR - N onreactance P - Magnetically polarized using biasing spring or having magnetic bias (c) Single headset receiver SA - Slow acting , ..- ....' SO -Slow operate SR - Slow release ~· TS - Two-step (DISCONTINUED) (a) Single-wound relay with make contact

4.44 Receptacles [See 4.13(d)]

4.45 Rectifier, Metallic (See 4.68)

Page 24 SECTION 950;70~.01

(b) Double-wound relay with break and make (f) Multicontact relay before-break contacts (1) Nonsplit multicontact relay

CDISCONTINUED)

\ ! ,--- (DISCONTINUED)--- (c) Relay with noninductive winding and transfer contacts

(2) Split multicontact relay (DISCONTINUED )

(d) Relay with preliminary make contacts

0 + 0 SEE NOTE-=il ~* ----y....+0

( DISCONTJ NUED)

(e) Relay in normally operated position

24 20 14 10 4 0 OR OR OR OR OR OR 29 2519 15 9 ~ ) !=~==M~=fl-==!~ (DISCONTINUED)

Page 25 SECTION 950.703.01

(g) Mechanically locking and electrically re (m) Ammeter-type relay leasing relay

(DISCONTINUED) (n) Sensitrol-type relay RESET RESET (h) Solenoid-tYPe relay [See 4.14 (b)] WDG WDG (i) Polarized telegraph-tYPe relay

(DISCONTINUED)

(j) Double contact-type relay ( o) Mercury contact-tYPe relay 4 5 )

(k) Thermal delay relay (Also see 4.59)

( p) Voltage-tYPe relay o-- + -0J- 3 125vl~~~135v SELF-HEATED ) ~ (DISCONTINUED} 125V 135V EXTERNALLY~ HEATED Lt£fJH ( l) Thermostat-type relay 0-fTT\..o..

(DISCONTINUED) ) 4.48 Resistors (Also see 4.41) (a) Resistor with one winding (DISCONTINUED) --A/\1\r- )

Page 26 27

Page

950.703.01

sounder

selector

SECTION

type

(DISCONTINUED)

etc,

sounder

--tl

bar,

rotary-type

tone

c::::::J

Telegraph-type

22-terminal

Chime,

Sounders

Signals

(b)

(a)

4.53

4.52

•

having

·10

and

windings

5 8

~ both

selector

Resistor

(DISCONTINUED)

(DISCONTINUE

windings

I•

resistor

4.05)

(DISCONTINUED)

Hlk=

two

•

see

common

rotary-type

Adjustable

with

windings

(Also

spool-type

terminal

I+

Resistor

Tapped

10-terminal

Relay

one

Ringer

Rheostat

Selectors

~0N

4 2

(b)

(c)

(d)

(a)

4.51

4.50

4.49

)

(

') r)

Page Page

4.54 4.54

SECTION SECTION

(a) (a)

( (

(5) (5)

(4) (4)

( (

(1) (1)

28 28

3) 3)

2) 2)

Switches Switches

Step-by-step Step-by-step

oo---, oo---,

0 0

oo---J'++ oo---J'++

Wipers Wipers

0 0

950.703.01 950.703.01

Vertical Vertical

Normal Normal

Vertical Vertical

Magnets Magnets

Wipers Wipers

! !

2 2

: :

. .

and and

H H

post post

:ill+ :ill+

r--r--

commutator commutator

off-normal off-normal

Bank Bank

+3 +3

system system

3~ 3~

2c::::a 2c::::a

0~ 0~

lc::::a lc::::a

banks banks

5 5

I I

springs springs

VON VON

Upper Upper

selector-tYPe selector-tYPe

Lower Lower

springs springs

and and

Bank Bank

wiper wiper

Bank Bank

switches switches

Cutting Cutting

Special Special

Closed Closed

Cam Cam

BR BR

~ ~

I I

--~~ --~~

----+ ----+

7/8 7/8 and and

(b) (b)

2 2

I I

in in

(7) (7)

(6) (6)

eams eams

5 5

Positions Positions

Sequence-type Sequence-type

~ ~

Cams Cams

~ ~

Only Only

11th 11th

Rotary Rotary

Connected Connected

8R3 8R3

~~~5 ~~~5

~------tDs ~------tDs

8R4 8R4

...... _ ...... _

+---

(R) (R)

Electrically Electrically

2/16 2/16

-T-

Connected Connected

rotary rotary

Electricallv Electricallv

Magnet Magnet

off-normal off-normal

t t

step step

RON RON

to to switches switches

~ ~

),2),'4 ),2),'4

I I

2-3 2-3

-+ -+

___. ___.

(For (For

springs springs

3 3

t·iagnet t·iagnet

.. ..

Rotary Rotary

sprinr;s sprinr;s

Position Position

~ ~

Closed Closed

~ ~

in in

Open Open

(A) (A)

4 4

K~---

10-15-18/ 10-15-18/

1-2-3-

Positions Positions

8Rl, 8Rl,

+--

' '

I I

Inclusive Inclusive

I• I•

On On

1/5 1/5

Cam Cam

I I

Continuously Continuously

1 1 y

All All

~ ~

I I

Spec Spec

Contacts Contacts

Special Special

Closed Closed

Plated Plated

Only) Only)

in in

Positions Positions

BR2 BR2

I I

to to

in in

5, 5,

) )

) ) ) ) SECTION 950.703.01

( ) (c) Knife, rotary, snap, toggle, or tumbler-tYPe (e) Crossbar selector-type switch switches (1) Single-pole, single-throw switch ~ r~Irkkki 1 I I I I I SPST I ,·1 1

(2) Single-pole, double-throw switch

0 0 I 2 3 4 5 SPOT 2 4 ( 3) Double-pole, single-throw switch ~r~i I 17 3

DPST DPST (DISCONTINUED} DISCONTINUED----

( 4) Double-pole, double-throw switch t\ 'i\

0 0 0 0 DPDT DPDT (DISCONTINUED)

) (d) Cover- or door-type switches (1) Cover or door closed, switch opens when cover or door operis r 4 5 0 2 3 ) (2) Cover or door closed, switch closes when cover or door opens Notes: A. SEL magnets may be placed on right or. _.1 left of contacts as best suits wiring con ) dition.

Page 29

SECTION SECTION

Page Page

12 12

UNLESS UNLESS

NUMBERS NUMBERS

(VIEWED (VIEWED

(f) (f)

(g) (g)

0 0

T2 T2

Ll Ll

5 5

~---\ ~---\

B. B.

C. C.

(1) (1)

30 30

II II

9 5 5 9

/-~-~-~-/ /-~-~-~-/

Rotary-type Rotary-type

Selector-type Selector-type

L2 L2

terminals terminals

Tl Tl

SEL SEL

be be

to to

HOLD HOLD

Contacts Contacts

950.703.01 950.703.01

Application Application

CORRESPOND CORRESPOND

10 10

OTHERWISE OTHERWISE

7!~10 7!~10

suit suit

FROM FROM

shown shown

IN IN

8 8

magnets magnets

T4 T4

L3 L4 L5 L5 L4 L3

BOTH BOTH

\_. \_.

schematic schematic

7 7

· ·

magnets magnets

(T2) (T2)

(LI) (LI)

WIRING WIRING

on on

is is

OR OR

at at

(high (high

\ \

6 6

T3 T3

8 8

2 2

switches switches

SEL SEL

run run

FIGURES FIGURES

......

either either

where where

4 4

INDICATED) INDICATED)

(L2l (L2l

--\--:\ --\--:\

(TI) (TI)

vertically. vertically.

voltage) voltage)

or or

conditions. conditions.

3 3

may may

SIDE, SIDE,

I I

T6 T6

&"'12 &"'12

HOLD HOLD

+Oil· +Oil·

end end

wiring wiring

2 2

be be

L6 L6

T5 T8 T8 T5

I I

of of

shown shown

magnets magnets

from from

TERMINAL TERMINAL

NUMBERING NUMBERING

ERENCE ERENCE

magnet magnet

FOR FOR

L L 7

REF

contact contact

under under

T7 T7

L8 L8

ONLY ONLY

may may

core core

4.55 4.55

4.56 4.56

4.58 4.58

4.57 4.57

4.59 4.59

(b) (b)

(a) (a)

(d) (d)

(a) (a)

TERMINAL, TERMINAL,

TEST TEST

AND AND

D.ES D.ES

AS AS

SHALL SHALL

Switchhook Switchhook

Terminals Terminals

Terminal Terminal

Test Test

1'hermal 1'hermal

Cross-connecting Cross-connecting

Apparatus Apparatus

Terminal Terminal

Coaxial Coaxial

External External

A A

IGNATED IGNATED

CODED CODED

JACK, JACK,

POINTS POINTS

0 0

Point Point

BE BE

(DISCONTINUED) (DISCONTINUED)

terminal terminal

Devices Devices

v v

Strip Strip

heater heater

ETC,( ETC,(

strip strip

terminal terminal

r<> r<>

SUCH SUCH

0 0

·+ ·+

OR OR 8 8

0 0

or or

0 0

DISCONTINUED) DISCONTINUED)

unit unit

terminal terminal

[See [See

T.P. T.P.

O O

0 0

4.47 4.47

punching punching

(k)] (k)]

) )

) ) ) ) SECTION 950.703.01

( ) (b) Integral heater unit (b) Indirectly heated thermocouple

HEATER (SEE NOTE) I< (DISCONTINUED) (DISCONTINUED) 4.62 Timer 7 (c) Self-heated unit [See 4.47 (k)] AND HD R L~ lflLI6 - ---- ( DISCON.T INUEDl------.\ (DISCONTINUED) 7 AND R 4.60 Thermistors Directly l~OT (a) heated thermistor Ll +-6

e 4.63 Tone Alternator (DISCONTINUED) 7 (b) Indirectly heated thermistor ".lf0 -8---8---E- T (DIS CONTINUED) Mr::lr::l ) 4.61 Thermocouples ,.....----(DISCONTINUED.)---.\ Note: Explanatory words and arrows are not a part of the symbols shown. ~FwF+ (a) Directly heated thermocouple

) _./ HEATER (SEE NOTE) K 888 ( DISCONTINUED) )

Page 31 SECTION 950.703.01

4.64 Transformer (See 4.12) (f) N-tYPe field-effects transistor 4.65 Transistor (Semiconductor Devices) (Also see 2.08 and 4.17) (a) P-N-P transistor. (also P-N-1-P transistor if leaving out the intrinsic region does not result in ambiguity) E c (g) P-N-P-N transistor (hook or conjugate emitter connection)

(DISCONTINUED)

(b) N-P-N transistor (also N-P-1-N trans sistor if leaving out the intrinsic region (h) N-P-N-P transistor (hook or conjugate does not result in ambiguity) emitter connection)

) (c) P-N unijunction transistor (sometimes (i) P-N-P-N transistor (remote base connec- called double base diode or filamentary transistor) tion) ~ (d) N-P unijunction transistor (sometimes (j) N-P-N-P transistor (remote base connec- called double base diode or filamentary tion) transistor) ~ (e) P-type field-effects transistor (k) P-N-P-N transistor without base connection )

)

Page 32 33

Page.

950.703.01

connection

ohmic 9

SECTION

UEO)---.\

with

region

CONTI

tube

tube·

transistor

(01

...

Electron

intrinsic

cathode

the

r---

N-P-1-P

Cathode-ray

Transmitters Cold

Tul1es,

r----,(OISCONTINUEO)---....

(q)

(a)

(b)

4.66

4.67

connection

ohmic

with

region

transistor transistor

transistor

tetrode

intrinsic

the

N-P-N

P-N-1-P

P-N-P P-N-1-N

N-P-1-N

to to

.to

(l)

(m)

(n)

(o) (p)

)

1. SECTION

4.68

Page

(c)

(d)

(e)

Pentode

Tube,

Varistors

Diodes

Twin-triode

950.703.01

showing

4.17)

tube

or 6

tubes

Metallic

.....

shield

A sleeve v

Rectifiers

SHIELD

SLEEVE

(Part

Symbo

(Also

see

4.69

5.01

(a)

(b)

(a)

(b)

COAXIAL see

Note:

resistance

Note: sion

The

unless carries

Continuity

understood,

,---(DISCONTINUED)---...

Vibrator

quired) Typical

Transmission

Typical

Coaxial

Waveguide,

the

4.131

recognition

path

needed

beginning,

Arrow

AND

note

shunt

to single

and

separate

positive

unless

indicates

circular all

extends

WAVEGUIDE

Path

drive

additional

symbol

line e

the

end,

conductors

the

drive

contrary.

current

represents

(contacts

for

the

schematic

middle

points

its

used

(contacts

direction

SYMBOLS

flow.

entire

once,

the

for

required)

transmis

the

drawing

path

clarity.

of length.

either

(Also

path

low

)

) SECTION 950.703.01

) (c) Waveguide, rectangular 5.05 Coupling By Aperture With an Opening of Less Than Full Waveguide Size (a) Designate E, H, or HE.

/ 0 ( ) ( 1) E indicates that the physical plane of the aperture is perpendicular to the (d) Waveguide, ridged transverse component of the major E lines. (2) H indicates that the physical plane of the aperture is parallel to the transverse component of the major E lines. B (3) HE indicates coupling by all nH,P.r kinds

~ of apertures. \ ; (e) Connectors (See 4.13) ( 4) Transmission loss may be indicated. (b) Coupling by apP.rture to space 5.02 Antenna - General

(b) Coupling by loop to guided transmission path. ~DB

) 5.06 Coupling By Probe (See 5.13) ~ (a) Coupling by probe to space •

(c) Application: Coupling by loop from coaxial to circular waveguide 1 (b) Coupling by probe to a guided transmission ) go path (DISCONTINUE Of 1 )

Page 35

5.07 5.07

5.08 5.08

SECTION SECTION

Page Page

elements elements

la) la)

interest. interest. (c) (c)

(d) (d)

(b) (b)

(e) (e)

(a) (a)

(3) (3)

(1) (1)

(2) (2)

36 36

Directional Directional

Coaxial Coaxial

axial axial

Discontinuity Discontinuity

General General

Application: Application:

Resistance Resistance

Aperture Aperture

the the

Coaxial Coaxial

To To

dicated. dicated.

950.703.01 950.703.01

Arrows Arrows

Transmission Transmission

Number Number

be be

properties properties

to to

throughout throughout

drawn drawn

X'lJ X'lJ

X X

rectangular rectangular

loop loop

X® X®

probe probe

coupling, coupling,

X X

indicate indicate

coupling coupling

Coupler Coupler

of of

coupling, coupling,

for for

Coupling Coupling

of of

coupling coupling

coupling, coupling,

~ ~

loss loss

I I

a a

one one

the the

component component

direction direction

designate designate

(DISCONTINUED) (DISCONTINUED)

waveguide waveguide

3008 3008

may may

3008 3008

of of

3008 3008

frequency frequency

30-db 30-db

the the

by by

paths paths

30-db 30-db

be be

probe probe

types types

of of

attenuation attenuation

indicated. indicated.

E, E,

that that

may may

power power

attenuation attenuation

H, H,

of of

range range

from from

exhibits exhibits

or or

circuit circuit

be be

flow. flow.

HE HE

of of

(b) (b)

(1) (1)

(3) (3)

(2) (2)

( (

4) 4)

Equivalent Equivalent

resonance resonance

onance onance

Capacitive Capacitive

Inductive Inductive

L-C L-C

circuit circuit

series series

reactance reactance

with with

element element

(DIS (DIS

( (

zero zero

0 0 infinite infinite

(DISCONTINUED) (DISCONTINUED)

ISCONTI ISCONTI

CONTI CONTI

reactance reactance

general general

reactance reactance

NUEO) NUEO)

NUED) NUED)

at at

res

at at

) )

) ) ) )

in in

of of

at at

37 37

the the

coup

to to

Page Page

plane plane

labeled labeled

950.703.01 950.703.01

coaxial coaxial

be be

normal normal

susceptance susceptance

Open) Open)

and and

is is

indicates indicates

SECTION SECTION

should should

zero zero

(DISCONTINUED) (DISCONTINUED)

Fully Fully

ring ring

wavelengths. wavelengths.

H H

E E

(DISCONTINUED) (DISCONTINUED)

circle circle

with with

the the

Waveguide Waveguide

in in

guide guide

distances distances

inside inside

ring. ring.

~RH) ~RH)

(Aperture (Aperture

circular circular

.of .of

circuit circuit

wye wye

field field

the the

or or

Critical Critical

of of

Letter Letter

the the

terms terms

L-C L-C

resonance resonance

Hybrid, Hybrid,

Hybrid Hybrid

Tee Tee

Application: Application:

lings lings

Junction Junction

1) 1)

5) 5)

(2) (2)

( (

axis axis

(d) (d)

(b) (b)

(a) (a)

5.09 5.09

at at

susceptance susceptance

general general

(DISCONTINUED) (DISCONTINUED)

infinite infinite

(DISCONTINUED). (DISCONTINUED).

element-

with with

susceptance susceptance

shunt shunt

circuit circuit

L-C L-C

Inductive Inductive

resonance resonance

Conductance Conductance

Resistance Resistance

Capacitive Capacitive

Equivalent Equivalent

4) 4)

5) 5)

1) 1)

( (

q) q)

(2) (2)

( (

) )

• •

• • !l !l SECTION 950.703.01

(e) Application: 5-arm circular hybrid 5.14 Phase Shijter

5.15 Resonator (Excluding Piezoelectric and Magnetostriction Devices) 0 (a) Applications 5.10 Mode Suppression (1) Resonator coupled by an aperture to rec tangular waveguide and by a loop to a ,~M coaxial. With mode suppression.

5.11 Mode Transducer T (a) Applications ) (1) Transducer from rectangular to circular waveguide (2) Resonator coupled by a probe to a co axial. With tuning. Variable Q.

(2) Transducer from rectangular waveguide to coaxial with mode suppression 5.16 Rotation -a-To- OT9 ) M M u 1( ~( (DISCONTINUED) 5.17 Short (Transmission Path Terminated in a Short) 5.12 Movable

(a) Movable short 5.13 Open (See 5.06)

)

Page 38 ·

39 39

to to

the the

are are

sup

draw

to to

list list

Associ

Page Page

attached

to to

electrical electrical

mode mode

950~703.01 950~703.01

peculiar peculiar

( (

symbols symbols

order order

on· on·

for for

in in

with with

, ,

schematic schematic

revised revised

used used

thes~ thes~

Standards Standards

SECTION SECTION

symbols symbols

(DISCONTINUED) (DISCONTINUED)

approved approved

required required

those those

symbols symbols

American American

completely completely

Transformer Transformer

practicable, practicable,

those those

the the

as as

was was

detached-contact detached-contact

circuit circuit

include include

by by

with with

REISSUE REISSUE

far far

System. System.

components components

and and

the the

and and

As As

section section

FOR FOR

Bell Bell

Application: Application:

pression pression

id~ntical id~ntical

ation ation

the the diagrams diagrams

ings. ings.

semble semble

contact contact

This This

various various

(a) (a)

1. 1.

REASON REASON

Trans· Trans·

Step Step

Transmission Transmission

and and

of of

~~ ~~

Change Change

{DISCONTINUED) {DISCONTINUED)

Tapers Tapers

Mode Mode

For For

Number Number

Used) Used)

Be Be

Without Without

(Any (Any

May May

formers formers

Transformation Transformation

Paths Paths

Switch Switch

5.19 5.19

5.18 5.18

) )

.. ..

• •

!) !)

( ( iJ iJ

.Page .Page

Cable Cable

Buzzers Buzzers

Circuit Circuit Capacitors Capacitors

Bells Bells

Binding Binding

Autotransformer Autotransformer

Attenuator Attenuator

Batteries Batteries

Associated Associated

Antenna. Antenna.

Amplifier Amplifier

SECTION SECTION

Application Application

Variable Variable

AC AC

Toggle Toggle

AC-DC AC-DC

Fixed Fixed

Electrolytic Electrolytic DC DC

DiHerential DiHerential

AC-DC AC-DC

AC AC

DC DC

Solar Solar

Potential Potential

One One

4-wire 4-wire

CEMF CEMF

Multicell Multicell

Triple Triple

Quad Quad

control, control,

Paired Paired

Aerial. Aerial. Leads Leads

Cable, Cable,

Local Local

Leads Leads Cross-connection Cross-connection

Cable, Cable,

Counterpoise Counterpoise Loop Loop

Single Single

Where Where

40 40

bell bell

buzzer· buzzer·

Breaker Breaker

buzzer buzzer

bell bell

cell cell

cable cable

battery battery

Post Post

capacitor capacitor

run run

requiring requiring

twisted twisted

cells cells

twist twist

and and

twisted twisted

coaxial coaxial

buzzer buzzer

bell bell

switch switch

more more

line line

950.703.01 950.703.01

(two (two

switchboard switchboard

etc etc

or or

supply supply

Conductors Conductors

battery battery

from from

capacitor capacitor

variable variable

adjustable adjustable

or or

. .

Potential Potential

. .

pairs pairs

leads leads

ALPHABETICAL ALPHABETICAL

loose loose

type type

wires wires

. .

terminal terminal

segregation segregation

wires wires

twisted) twisted)

are are

capacitor capacitor

circuit circuit

wiring wiring

. .

Supply Supply

capacitor capacitor

shown shown

to to

breaker breaker

terminal terminal

. .

for for

INDEX INDEX

. .

crosstalk crosstalk

. .

10,11,12 10,11,12

8,34 8,34

9,35 9,35

Page Page

11 11

11 11 11 11

11 11

10 10

11 11

10 10

11 11

10 10

35 35

10 10

8 8

7 7

8 8

7 7 8 8

8 8

7 7

8 8

9 9

Coupling Coupling

Counterpoise Counterpoise

Core Core

Contactors Contactors

Contact Contact

Connectors Connectors

Conductors, Conductors,

Components, Components,

Coils, Coils,

Coaxial Coaxial

Clutch Clutch

Clock, Clock,

Solenoid-type Solenoid-type

Coupling Coupling

Core, Core,

Core Core

contact contact

Normally Normally Reloy Reloy

and and

Moving Moving

nonlocking nonlocking

Moving Moving

Switchboard-type Switchboard-type

connectors) connectors)

Separable Separable

male male Fixed, Fixed, Cord Cord

supply supply

Coaxial Coaxial

Connectors Connectors

Autotransformer Autotransformer

Alarm-type Alarm-type

Inductor Inductor

Protector-type Protector-type

Induction Induction

Inductor, Inductor,

available available

Two Two

Four Four

Three Three

Coupling Coupling Designate Designate

less less

Heat Heat

Autotransformer, Autotransformer,

Electric Electric

for for plugs) plugs)

tip-type tip-type

Magnets Magnets

contacts contacts

magnetic magnetic

and and

(armature) (armature)

adjustable, adjustable,

ends ends

than than

(convenience (convenience

contact contact

ends ends

connectors connectors

relays, relays,

by by

closed closed

AssociQted AssociQted

Repeating Repeating

coil, coil,

Waveguide Waveguide

connectors connectors

Symbol Symbol

keys, keys,

by by

commonly commonly

of of

. .

full full

aperture aperture

heat heat

E, E,

. .

of of

connector connector

transmission transmission

engaged engaged

aperture aperture

heat heat

H, H,

repeating repeating

for for

or or

lgenerall lgenerall

transmission transmission

waveguide waveguide

magnets, magnets,

and and

etc etc

coil coil

or or

-type -type

or or

connectors connectors

armature armature

. .

locking locking

coil coil

HE HE

sliding sliding

outlets outlets

with with

·Induction ·Induction

Coil, Coil,

normaliy normaliy

. .

showing showing

on on

Symbols Symbols

used used

to to

. .

bus bus

coil, coil,

an an

etc etc

space space

Transformer Transformer

keys, keys,

path path

contacts contacts

for for

and and

size size

(jacks (jacks

opening opening

path path

bar bar

transformer transformer

open open

female female

. .

relays, relays,

power power

Coil, Coil,

available available

jacks, jacks,

mating mating

. .

of of

and and

etc etc

. .

2,13 2,13

2,11 2,11

Page Page

35 35

36 36

35 35

16 16

17 17

16 16

14 14

16 16

15 15

14 14

19 19

34 34

11 11

4 4

9 9

2 2

7 7

2 2

.. ..

) )

) ) ) ) SECTION 950.703.01

Page Page Coupling by loop . 35 Handsets 19 Coupling by loop to space 35 3-conductor handset 19 Coupling by loop to guided transmission 4-conductor handset 19 path 35 4-conductor handset with push-to-talk Application: Coupling by loop from switch 19 coaxial to circular waveguide 35 Headset, Operator . 19,24 Coupling by probe . 35 Heat Coils . 19 Coupling by probe to space . 35 Alarm-type heat coil on bus bar . 19 Coupling by probe to a guided trans Protector-type heat coil 19 mission path . 35 Application: Coupling by probe from Heating Resistor 2 coaxial to rectangular waveguide . 36 Horn or Howler . 19,22 Cross-connection Wires . 7 Inductance . 2 Crystal Units 17 Induction Coil 2,12 Detached-contact Schematic Symbols 6 Inductors 2,13 Break . 6 Core and winding . 6 Instruments and meters . 19 Make 6 Meter shunt 20 Dials . 17 Interrupters . 20 Diodes . 17,32 Ringing interrupter 20 Directional Coupler 36 Jacks. . 14,20 Aperture coupling, designate E, H, or HE 36 Junction (aperture fully open) . 37 Coaxial loop coupling, 30-db attenuation . 36 Application: waveguide and coaxial Coaxial probe coupling, 30-db attenuation . 36 couplings 37 General . 36 Application: 5-arm circular hybrid 38 Resistance coupling . 36 Hybrid 37 Hybrid, circular . 37 Discontinuity 36 Tee or Wye . 37 Equivalent series element - general 36 Equivalent shunt element - general 37 Keys . 2,20 Half of lever-type key normally operated . 20 Drops 17 Jack-type key . 20 Electrically restored drop . 17 Locking lever-type key . 20 Manually restored drop 17 Nonlocking lever-type key 20 Electromagnet . 17 ·Plunger-type key . 21 Selector-type key . 21 Electron Tubes . 3,33 Telegraph-type key 21 Engine-Generator Set 18 Keytop Diagrams . 21 Lever-type keytop diagrams 21 Fuses. 18 Push-button-type keytop diagrams 21 Alarm-type fuse 18 Selector switch-type keytop diagram . 22 Alarm-type fuse on bus bar 18 Turn button-type keytop diagrams . 22 Fuse (no alarm) -. 18 r\__ ) Fuse in safety-type holder . 18 Lamps 27 Double-filament ballast or resistance lamp . 22 Generator, Hand-type . 18 Glow-type lamp . 22 Ground Symbols . 18 Illuminating-type lamp . 22 Chassis or frame ground . 18 Single-filament ballast or resistance lamp . 22 _) Earth ground 18 Switchboard-type lamp . 22

Page 41 SECTION 950.703.01

Page Page Line Symbols 7 Receptacles . . 15,24 Loudspeaker, Horn, Howler, Telephone Rectifier, Metallic . . 24,34 Receiver (tone ringer) . 22 Regulator 24 General 22 Identification of loudspeaker parts 22 Relays 2,16,24 Ammeter-type relay 26 Message Register 23 Double ccmtact-type relay 26 Meters . 19,23 Double-wound relay with break and make-before-break contacts 25 Microphone . 23 Mechanically locking and electrically Mode Suppression 38 releasing relay . 26 Mercury contact-type relay .. 26 . Mode Transducer 38 Multicontact relay . 25 Applications 38 Polarized telegraph-type relay . 26 M~~ ~ Relay in normally operated position 25 AC induction-type motor 23 Relay with noninductive winding and DC shunt motor 23 transfer contacts 25 Relay with preliminary make contacts 25 Movable (coaxial and waveguide symbol! . .38 Sensitrol-type relay 26 Networks 23 Single-wound relay with make contact . 24 Solenoid-type relay . 17,26 Networks when used as contact protection . 23 ·Typical networks 23 Thermal delay relay . 26 Thermostat-type relay 26 Open (coaxial and waveguide) . 36,37 Voltage-type relay 26 ) Path, Transmission (coaxial and waveguide) . 34 Repeating Coil . 2, 12,13 Coaxial, cable . 8,34 Resistor, heating 2 Connectors . 14,35 Waveguide, circular 34 Resistors 26 Waveguide, rectangular . 35 Relay spool-type resistor . 27 Waveguide, ridged 35 Resistor with one winding 26 Resistor with two windings and having Paths and Path Junctions 9 one terminal common to both windings . 27 Crossed paths 9 Tapped windings .. 27 Joined paths 9 Multiple connection 9 Resonator (excluding piezoelectric and Optional or alternate paths 9 magnetostriction devices) 38 Spliced wires 9 Applications . 38 ) Phase Shifter 38 Rheostat or Adjustable Resistor 27 .. Piezoelectric, Crystal Unit 17 Ringer . 10,27 Plugs. . 14,23 Rotation (coaxial arid waveguide symbol) . 38 Potentiometers . 24 Saturable Reactor . 13 Primary Wiring Symbols 7 Selectors. 27 10-terminal rotary-type selector 27 Protector Blocks 24 22-terminal rotary-type selector 27 Receivers . 19,22,24 44-terminal rotary-type selector 27 Double headset receiver . 24 Semiconductor Devices 2,17,32 General 24 Single headset receiver . 24 Shielding, Methods of 8

Page 42 6 6

31 31

31 31 31 39 31 33 31 34 33 34 39 33 34 34 34 34 34

Page

2,32 2,32

2,32

3,33 6,34

Pages

12,32

Page

950.703.01

2,11,

trans

mode

SECTION

step

with

relays,

normal

and

components

sleeve

change

relays,

etc

with

thermocouple

for

drive

Rectifiers

thermistor.

tapers

thermistor

etc

mode etc

thermocouple

shield

devices)

'devices)

drive

Transformer

winding

used

tube

for

tube

windings

tubes

Path

capacitor,

heated

winding

Metallic

Symbols

tube

heated

shunt

separate

without

for

when

showing

end

cathode

Electron

Alternator

Directly Indirectly

Indirectly

Directly

Application: Tube, Inductive suppression Pentode Cold Inner symbol formers (semiconductor (semiconductor Cathode-ray electromagnets, Noninductive

Typical Typical

Twin-triode electromagnets,

Timer. Variable, Thermocouples Tone Trans~stor Transmission Varistors Thermistors Transformation Waveguide

Tube,

Windings

Transformer Transmitters Vibrator

6 2 2 2

9 7

38 27 27

38 27 29

29 28 29 39 30 30 30 28 30

30 30 30 31 34 30 30 30

.28 30

Page

26,31

.26,30

paths

switches.

sounder

waveguide

punching

switch

and

terminated

type

transmission

switches

selector-type

toggle,

voltage)

etc,

terminal

schematic

path

schematic

unit

sounder

switches

coaxial

switches

snap,

switches

system

bar,

waveguide unit

(high

terminal

door-~ype

apparatus

number

short

selector-type

strip

heater

terminal

used

and

tone

Strip

Devices

Element

rotary,

Components

short)

(Any

(transmission

P~int

in Movable

may

Rotary-type

Knife,

Chime,

External Crossbar

Telegraph-type Cross-connecting Cover- tumbler-type Integral Coaxial Coaxial symbol) Line Terminal Self-heated Apparatus Selector-type Sequence-type Complete Attached-contact

Detached-contact

Step-by-step

Short

Switch

Signals

Sounder Thermal Ther.,al Switches Terminal Test

Terminals

Switchhook Symbol

)

·~

{

1) l)