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INVENTOR. aa 7A/va A. Zowc 72.26-4- a//s arroa way June 23, 1953 A. H. LONG 2,642,663 MEASURING AND CUTOFF MACHINE Filed Dec. 8, 1949 4. Sheets-Sheet 3

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INVENTOR, aa 7A/va M7, 4 oMG 2,2'-262-2s a/s arreama/ Patented June 23, 1953 2,642,663

UNITED STATES PATENT OFFICE MEASURING AND CUTOFF MACHINE Arthur H. Long, Pittsburgh, Pa., assignor to Wm. K. Stamets Company, Pittsburgh, Pa., a cor poration of Pennsylvania Application December 8, 1949, Serial No. 131,739 9 Claims. (C, 33-132) 1. 2 This invention relates to a machine for mea Referring first to Fig. 1, the tube measuring Suring and cutting off lengths of linear material device and cutoff machine are shown intermedi such as strip, bar stock, pipe or other material ate of the inlet table and outlet table. The inlet generally measured and cut in linear lengths. table is marked I and the outlet table is marked The lengths of materia. Such as pipe are noved s O and the measuring device is indicated at MI longitudinally along a table to a measuring de and the cutoff machine is indicated at C. - The vice Where it, Strikes a flag SWitch Which causes inlet table is made up of a series of stands 2, each its travel Speed to be reduced and then the pipe . having a pipe feeding roll 3 and 4 journaled strikes a bumper that initiates a circuit causing therein and provided with an automatic feeding the pipe to become engaged by a measuring roll 10 device, indicated by the , alternately actuating that rotates an electromagnetic means to nea elevators 6 and which are operated from a com Sure off a predetermined pipe length as it pro mon lever attached to the shaft 8 and operated ceeds to a cutoff machine. When the pinch rol by Suitable means such as a fluid cylinder which engages the pipe, the electromagnet becomes en Oscillates the shaft to alternately raise the ele. ergized and attracts a tripping mechanism that Vator members 6 and 7 above the skid surface rotates with the magnet until the pipe has 5 for conveying tubes from a series of rollers. 4 traveled a predetermined distance in measuring to a series of rollers 3, from whence the tube off a specific length, at which time the tripping is moved longitudinally by rotating the series of mechanism is energized causing the pipe to be rolls 3 and 4 by their respective motors O. Both clamped in a wise which in turn opens the mea of the motors O are energized through a single suring pinch roll and starts the cutoff machine. control to operate them in unison at their high The cutoff machine functions to automatically or low Speed, or to stop them, which control may retract the cutters when the pipe is cut off and be readily and accurately determined. then move the cut length of pipe at high speed The measuring device M consists of two sets of from the cutting machine and initiate an index 2 5 feed rolls i? and 2, 3 and 4, together with the to feed another section of pipe in its place for idler pinch rolls 5 and 6 that are above the cutting. rolls f l and 3. When the tubing is moved longi This machine is also employed for measuring tudinally to the rolls ft and 3, stops 7 and 8 and cutting off the crop ends of a pipe, bar stock are raised by a single crosshead so as to be placed or other similar articles at a predetermined dis 30 in the path of the tubing in each line causing it to tance from its end. stop. When the front end of the tubing engages Other objects and advantages appear in the and passes over the switches 9 and 20, all of following description and claims. the motors O are reduced in speed. Just before The accompanying drawings show, for the pur the end of the tubing strikes the stops 7 and 8, pose of exemplification without limiting the in 35 it also strikes the switches 2 and 22 which fur vention or claims thereto, certain practical en ther reduces the speed of the motors to to sub bodiments of the invention. Wherein: stantially nil With just enough voltage thereon to Fig. 1 is a plan view of a mill layout showing maintain the tube against the stops 7 and 8, the relative position of the measuring device and but prevent the rolls from turning under the the cutoff machine; 40 weight of the tubing. The sequential operation Fig. 2 is a view in side elevation of the struc of the SWitches will be discussed later; however, ture shown in Fig. 1; the pinch rolls 5 and 6 are caused to be lowered Fig. 3 is a view in front elevation of the mea When the tubing strikes the stop and since the Suring machine; measuring rolls 23 and 24 are mounted on the Fig. 4 is a view in side elevation of the measur 45 Same Crosshead, they all come down at the same ing device and the cutoff machine; time. Both the idler pinch rolls 5 and 6 and Fig. 5 is an enlarged view in front elevation the measuring rolls 23 and 24 engage the upper of the target and the scanning disc of the mea Surface of the tubing when the stops 7 and 8 Suring device; are retracted and the tubes continue on their for Fig. 6 is a sectional view taken through the 50 Ward paSS through the fore gripping jaws 25 and axis of rotation of the scanning disc; 26 and through the cutoff machines 27 and 28 Fig. 7 is a front elevation of a dual cutoff and the aft gripping jaws 29 and 30 to the outlet machine shown in Fig. 1; and table illustrated by the sets of rolls 3 and 32 Fig. 8 is a side elevation of the dual cutoffma driven by the motors 33 in a manner very similar chine shown in Fig. 1. SS to that of the inlet table. When the tube passes 2,642,668 3 - on to the outlet table, its crop end will proceed direct current or rectified current as the coil 54 a predetermined distance determined by the is designed to operate, in this particular in measuring device M, which stops the motors fo stance, on direct current. and 33 and the rolls whereupon the fore and aft The annular cylindrical housing 5 is closed by clamping jaws 25, 26, 29 and 38 close on their 5 the annular disc 60 on the front thereof, which respective tubes and the cutoff machines 2 and disc is provided with an outwardly extending 28 cut the predetermined crop end of pipe from sleeve 6 f. that carries the bearings 62 therein for the tubing. When the cutters have cut through the purpose of rotatably supporting the shaft, 63. the pipe, they are retracted to their original posi The inner end of the shaft 63 is provided with a tion which trips a switch to open the fore and aft 10 pendulum member 64, the hub of which is secured chucks and start the table notors 0. The to the shaft and which extends radially outwardly cropped end slides down a chute onto a conveyor to a point Opposite the air gap formed by the an as shown in Fig. 2. The motors 33 are speeded nular discs or magnetic pole faces 52 and 53. The up to quickly take the cut section of pipe away outer end of the pendulum 64 is provided with a from the cutoff machine. The measuring device 5 transverse opening to receive the pin 65 having a may be set to again measure the next section of flat head 66, the pin preferably being inade of pipe which proceeds through the cutoff machine nonmagnetic material, but the head being inade to the outlet table. However, the to-length gauge of magnetic material. Thus, when the coil 58 is 9, which is adjustable along the outlet table, func energized, it will attract the outer end of the pin tions to stop the tubing at a predetermined dis 20 and cause the pendulum to rotate with the coil. tance for multiple lengths after cropping and it A Socket is provided adjacent the hub of the initiates the operation of the cutoff machine. The pendulum to receive the ball 6 and the spring 68 outlet table carries the cut sections of pipe to a which forces the same against the inner face of predetermined distance determined by a series of the cover 60, there being an indentation 69 below switches, after which time they are raised from 25 the hub of the pendulum in the surface of the their respective rolls and are discharged laterally plate to receive the ball 67 for the purpose of . to a storage bin. damping the free movement of the pendulum and The measuring device is shown more in detail locating it for the initial or starting position after in Figs, 3 to 6 wherein the base 34 is provided with it falls by gravity from any position to the bottom an opening 35 to receive the drive shaft from the 30 of the casing when released by the magnet. motor it for the purpose of extending into the The shaft 63 extends out of the sleeve 6 and base and rotating the feed rolls f and 2, 3 is provided With a collar 70 having a transverse and 4. The motor to that is mounted adjacent pin f. The outer portion of the sleeve 6 is the measuring device for this purpose is construct arranged to receive the hub 72 of the scanner ed in the same manner as the other table motors 35 arm 73 and is held in place by the ring 72a. and is operated by the same controls as the other The Scanner arm 73 is not only journaled on the inlet table motors 0. Thus, the feed rolls f and sleeve 6, but may rotate through 360° thereon. 2 are aligned with the series of rollers 4 on the The Outer end of the scanner arm 73 is provided inlet table and the feed rollers 3 and 4 are With a knurled nob 74 secured to the stem 5 aligned with the Series of table rollers. 3 of the 40 which has an indicating lug 76 on its inner end inlet table. in the shape of a V for being received in the The base 34 is provided with an upper casting notches 7 shown around the perimeter of the 36 that houses a crosshead 37 that extends from plate 60. The indicator 76 is biased to receive one side of the casting to the other and supports and hold the Scanner arm 73 at any given posi the pinch rolls 5 and 6 and the measuring rolls tion. When inserted in One of the notches about 23 and 24. The pinch rolls 5 and 6 are idler 45 the periphery of the plate 60. A Small Window rolls journaled on bearings supported by the cross 8 is provided in the scanner arm to view a head 37. This crosshead also has rearwardly ex figure corresponding to the notch on the perim tending flanges 38 on each side thereof in which eter of the disc 60, which numeral indicates the the measuring rolls 23 and 24 are journaled. The number of inches or length that a tube extends shafts of the measuring rolls extend inwardly and 50 from the cutters in the cutoff machine. It will are provided with universal joints 39 which con be noted that the particular device shown has a nect them to the shaft 40 provided With a second notch every half inch. Thus, the pipe being set of universal joints 4f, as shown in Fig. 5, Severed by this cutoff machine can be cut in which in turn are connected to the intermediate lengths of One-half inch. These notches may be shaft 42 housed in the bearings 43 and having a 55 made at any desired fraction of an inch. worn 44 secured intermediate the ends thereof. The Scanner arm is provided with a micro The Worm 44 is in mesh with the worm gear 45, as SWitch, indicated at 80, which is provided with shown in Fig. 6, carried by the shaft 46 journaled an Operating Shaft 8 on Which is clamped the in the bearings 47, one of which is supported in actuating arm 82 of the adjustable trigger 83 the housing 48 and the other in a bearing carrier 60 that may be engaged by the pin for the pur plate 49 carried by the housing 48. The worm pose of Operating the switch 80 in initiating an gear shaft 46 extends into the annular housing 50 electrical circuit, which, in this instance, causes and has secured thereto the annular ring type the Wise or the fore and aft clamp members on magnet 5 which has opposed spaced annular pole 65 the cutoff machine to engage and clamp the faces 52, 53 in the form of circular discs that pro pipe in position, which in turn starts the cutting vide the pole faces of the magnetic gap of the machine and also stops the motors 0. electromagnetic coil 54. The electromagnetic Thus, upon setting the scanner arm at any coil 54 is electrically connected to the col Selected position around the perimeter of the lecting rings 55 and 56 on the back of the an disc 60, the measuring device when energized nular electromagnetic member 5; and are en 70 Will permit the tube to move longitudinally into gaged by the Spring biased brushes 57 and 58 held the cutting machine to a predetermined distance by the insulator 59 on the back of the housing 48. and the pendulum is taken around by the magnet This electromagnetic coil 54 is connected by the until the Switch 80 is actuated according to the Wire leads to a suitable electric current such as a 75 Selection of the Scanner arm, at which time the 2,642,668 5 6 jaws of the vise will close on the tubing and t. members, the stop. 93 engages the switch. 94 to table rolls will cease to rotate, permitting the Open the circuit to the Solenoid that was closed cutting machine to function for the purpose of by the SWitch 92 and also to open the chucks 25 Cutting off predetermined lengths of pipe. Al and 26, 29 and 30 on both ends of the cutoff though the indication on the perimeter of the machine. This permits the severed tubing to be disc 60 shows only sixty inches, it is obvious free and also initiates the circuit for starting that this Scale may continue around the periph up the table motors 0 and 33 to move the ery and also function in multiples thereof. In Severed pipe Out of the machine and the next other Words, if it is desired to run a pipe con section into the machine. As previously stated, siderably longer than the Scale on the annular O the motors 33 operate at a faster Speed to re disc 60, the same may be accomplished by means move the severed Section of pipe at a faster rate of a relay which permits the microswitch 80 to than motors O of the inlet table in conducting operate one or more times before it will actually the pipe to the cutoff machine. be effective in stopping the table motors and Although the Switches and the structure of close the chucks for the purpose of cutting off 5 the machine have been described With reference tubing. to One cutoff machine, it is obvious that the Referring specifically to Figs. 7 and 8, it will machine disclosed is a dual machine for measur be noted that each of the cutoff machines 27 ing and cutting off the work in unison, the elec and 28 is provided with mechanically actuated tric circuits being checked through the same Switches 84 and 85 that are operated by bracket 20 switches on both sides of the dual machine so cams carried on the slide of the chuck jaWS 25 as to be sure of the complete performance of and 28. The switch 84 is actuated upon the each step by one-half of the machine before the closing of the jaws 25 of the chuck on the cut next proceeding step is initiated. off machine to initiate the cutoff feed and rapid When this invention is employed at the end traverse and also to lift the pinch rolls and 25 of a tube mill, the tubes are ordinarily received set up the multiple stop 9 of the outlet table on skids where they had previously been placed to receive the pipe continuing through the mill. by a kickoff machine from a straightener outlet The switch 85 normally functions when the jaws conveyor. The tubes then roll by gravity to stops open, after the tube has been cut off and closes a at the inlet table of the cutoff machine line. A circuit to start the table notors and convey the 30 selector is then actuated to provide that the tubes tubes from the inlet table through the cut-off may be loaded on the near side of the table on machine to the multiple stop 9. the rolls 4 or on the far side of the table on The feed of the cutoff machine is actuated by the rolls 3 or on both sides so that the tubes the hydraulic servomotor 87, as shown in Fig. 8, may be selectively cut off on either side or in which functions to move the clutch yoke.88 on its dual lines simultaneously. The master and se pivot pin 86 and thereby feed the cutting tools lective switches, which function to select one or (not shown) radially of the pipe to cut off the both of these lines, carry their control lines same. In view of the fact that the cutoff ma throughout the circuit in order that the machines chine is not, per se, a portion of this invention, are properly interlocked when functioning to but is disclosed in application, Serial No. 131,740, 40 gether or one is unlocked from the other when the further details of this machine are not dis functioning alone. closed or otherwise described, as Substantially When the tubes are received on the storage any kind of cutoff machine could be employed in skids, they are permitted to be indexed to the the place of that shown. Once the rapid traverse inlet table. When the tubes lie on the inlet table has been initiated on the feed of the cutoff ma 45 they close a flag Switch 95 which initiates the chine the yoke will rapidly move the cutters movement of the machine, the flag SWitch being into cutting position, at which time the Speed mounted on the bed of the inlet conveyor table of the hydraulic servomotor 87 will be reduced and operated by the tubes in line on the series to cutting speed until the tube is completely of rollers 3 and 4. These flag switches indicate severed, then the cutting tools are automatically when the line is clear of tubes and initiate the retracted by the retraction of the clutch yoke 88 50 operation of the index device for Supplying the in the hydraulic servomotor 87 reversing the tubes thereto. The indexing device, in supply stroke thereof, ing the tubes to the lines represented by the The hydraulic feed moves the yoke to the left, series of rollers 3 and 4, will remain idle until as shown in Fig. 8. The can 89 functions to 55 Such time as the flag switch 95 is actuated when operate the switch 3, which is a normally opened the tube passes off the same and permits it to switch, for the purpose of providing a slow Se rise and close its circuit, thereby initiating the lected feed as this switch and can are Set rela supply of another tube through the indexing de tive to one another so that when the cutters vice to the inlet table. - are about to engage the pipe the feed Will be 60 The flag switch 96 on the other line starts materially reduced to the hydraulic Servono the operation of the inlet and outlet conveyor to 8. motorS O and 33. The inlet Conveyors are Op When the clutch yoke approaches its extreme erated by relays and contactors for the purpose position in moving the cutter bars to completely of bringing the motors up to a predetermined sever the pipe, the stop 9i engages the Switch 65 speed to cause the tubes to move at a fast rate 92 which performs two functions, this SWitch without Skidding. having a normally closed circuit and a norrinally The tubes travel along the inlet conveyor table open circuit. The normally closed circuit, when operating the flag switches 9 and 20 which slow open by engagement of the stop 9, opens tle down the conveyors to a pre-set speed so that feed to the hydraulic servomotor 8 and thereby 70 When the tubes hit the stop 7 they will be stops the hydraulic feed to the yoke 83. The traveling at a minimum speed. The hitting of switch 92 also closes another circuit to reverse the stop 7 will operate the limit switch 3 the solenoid and hydraulic servomotor 8 to which energizes a solenoid of the four-way valve rapidly retract the cutters. As the yoke returns for the purpose of lowering the pinch rolls 5 and to its original position in retracting the cutting S f6 by hydraulically energizing the servomotor 2,642,668 7 8 04 to lower the crosshead 37. When the cross the stock has traveled a predetermined length, head 37 drops to its lower position, to engage the and means to simultaneously bring said clutch pinch rolls 5 and 6 and the measuring rolls 23 parts into operative relation when said wheel is and 24 to the tubing, the Switch 00, as shown brought into engagement with the stock. in Fig. 4, is actuated to drop the stop and 2. A machine for measuring and cutting start the motors O and 33 to convey, the tube to lengths of Stock comprising a rotary wheel the cutoff machine and, at the same time, en mounted to engage the stock and be rotated ergize the magnetic coil 54 for the purpose of through such engagement while the stock moves immediately picking up the pendulum and start longitudinally, a circuit initiating switch means ing it around its circular path of movement with O mounted for adjustment in an annular path, a the rotary coil 54. The tube continues to move to pair of revolvably mounted clutch parts ad the cutoff machine until the microSwitch 85 be jacent said switch, drive means between said ro comes actuated owing to the setting of the posi tary wheel and one of said clutch parts, a trip tion of the scanning arm 73 which, in turn, closes member actuated by the other clutch part to op the chucks on the cutoff machine and they, in 5 erate said circuit initiating switch means after turn, initiate the cutting off action. the stock has traveled a predetermined length, As previously stated this measuring machine means to simultaneously bring said clutch parts may be used to measure off lengths of bar, pipe into operative relation when said wheel is or Strip stock. The strip may be metal or paper brought into engagement with the stock, and and the action need not be cut off but may be 20 means initiated by said circuit initiating switch one of marking, forming, or shaping at prede means to operate on the measured length of termined spacings along the Stock. It is imma Stock. terial how the operation of this measuring de 3. A machine for measuring lengths of stock vice is initiated. As shown, the lowering of the comprising Operative means effective by a pre crosshead engages the measuring Wheel With the 25 determined position of the stock, a rotary wheel stock and energizes the electromagnetic clutch mounted to engage the stock in the machine and member. The consistent starting position and be rotated through such engagement, a circuit the measurement are primarily dependent upon initiating Switch means, a pair of revolvably the energization of the electromagnetic clutch mounted clutch parts, drive means between said member as the Wheel may always be in engage 30 rotary Wheel and One of said clutch parts, a trip ment with the stock which is continuously now member actuated by the other clutch part to ing. However, the important feature is the con Operate Said circuit initiating switch means after sistent starting position obtained through the use the Stock has traveled a predetermined length, of the weighted element such as the pendulum and means to simultaneously bring said clutch which when free swings to the bottom of its ro 35 parts into operative relation when said wheel is tary path of movement ready for the electro brought into engagement with said stock when magnetic clutch part to again be energized to actuated by said operative means. pick up and rotate the weighted element until 4. A cutoff mill comprising inlet and outlet the sequence is completed, close the circuit and tables having aligned rolls for supporting and perform the operation on the stock thus neaS 0. carrying stock, a measuring machine and a cut ured out. off machine With clamps positioned in tandem After the cutoff machine has completed its cycle between the aligned inlet and outlet tables, a and has initated the operation of the table rolls Stock actuated flag switch means to start the to remove the severed piece of pipe and to feed rolls to feed the stock when depressed and to the next section of pipe thereto, the adjustable initiate the supply of stock when released, a re bumper to length gauge 9 functions to repeated tractable stock stop, a second stock actuated flag ly operate the cutoff machine severing definite SWitch adjacent the discharge of the inlet table predetermined lengths of pipe until the Whole of to slow down the stock feed rolls as the stock ap the pipe has been completely used, at which time proaches Said stop, a measuring roll, a third the flag switch 0 becomes deenergized by the SWitch actuated when the stock engages said removal of a pipe therefrom and which in turn 50 stop to lower the measuring roll into engagement initiates the operation of the indexing machine With Said Stock and to cause withdrawing said to feed additional lengths of pipe to the lines stop to permit the stock to continue through the represented by the rolls 3 and 4. mill, Scanner switch means actuated by the ro When the end of the pipe first engages the stop tary movement of the measuring roll to stop the 7, it also actuates the limit switch paddle 02 55 rolls after a predetermined longitudinal move that in turn functions to actuate the Switch ment of the stock and to grip the stock in the 03 that closes the circuit to energize the hy clamps of the cutoff machine, means actuated by draulic servomotor iO4 to lower the crosshead 31 said clamps to operate the cutoff machine to and drop the pinch rolls and the measuring rolls 60 sever the measured stock piece and retract the into position. The switch 03 likewise inserts clamp to permit the remaining stock to be a resistance in series with the motors 0 to bring measured and Severed. them to a stalling speed and allowing only Suf 5. An automatic cutoff mill comprising inlet ficient voltage thereon to have them effective in and Outlet tables having dual lines of rolls for urging the pipe against the stop fl. 65 Supporting and conveying work, a dual cutoff I claim: - machine positioned between the inlet and out 1. A machine for measuring lengths of Stock let tables to receive and deliver work thereto, a comprising a rotary wheel mounted to engage the measuring machine between the inlet table and stock and be rotated through Such engagement the Cutoff machine and having dual lines of rolls while the stock moves longitudinally, a circuit 70 corresponding with the inlet table rolls, a pinch initiating switch means, a pair of revolvably roll, a measuring roll, a crosshead on said meas mounted clutch parts, drive means between Said uring machine carrying said pinch roll and said rotary wheel and one of said clutch parts, a trip measuring roll for engaging the top of the work member actuated by the other clutch part to op piece of each line, a work stop for each line car erate said circuit initiating Switch means after 75 ried by said measuring machine, and series con

2,642,668 9 10 nected Switch means actuated by the workpieces and attractable by the latter to rotate in syn engaging both stops to lower said crosshead, and chronism therewith but freely returnable when means to withdraw said stops when said measur released to a common starting point in its path ing and pinch rolls engage the top of the Work of movement, means actuated by the presenta pieces. 5 tion of the stock to induce attraction of the 6. A measuring device comprising a base, a weighted element by the clutch part to rotate roll carried by said base to support a workpiece, thereWith upon engagement of the stock by the a pinch roll, a measuring roll, a movable head wheel, and Switch means mounted adjacent said On Said base carrying said pinch roll and said guide means and actuated by the movement of measuring roll for engagement With the top of a 10 the weighted element to a predetermined position Workpiece supported by said first roll, a retract to cause its release from the clutch part and able stop beyond the first roll, switch means disengage the wheel from the stock when the actuated by the workpiece engaging said stop to stock has traveled a predetermined distance and initiate the lowering of the head to place the to initiate another action related to the prede pinch roll and the measuring roll into engage 5 termined stock length. ment with the Work, Switch means actuated by 9. A machine for measuring lengths of Stock the lowered head to withdraw the stop and con moved past a measuring Station comprising, a vey the work, and a switch actuated by the meas wheel rotatably mounted at the measuring sta uring roll to stop the movement of the Work after tion and movable to engage and disengage the traveling a predetermined distance from said 20 stock, an annular electromagnet rotatably mount stop. ed on the machine and connected to be driven 7. A machine for measuring lengths of stock by said wheel, means to simultaneously engage moved past a measuring station comprising a the Stock with said wheel and close a Switch to wheel rotatably mounted at the measuring sta energize said electromagnet, a pendulum mount tion and movable to engage and disengage the 25 ed to freely revolve on the same axis as the stock, a clutch part mounted for rotation on a electromagnet and closely adjacent thereto, said given horizontal axis and connected to be driven electromagnet locking and carrying said pendu by Said wheel, a weighted element, guide means lum with it when energized and when de-ener to direct said weighted element to revolve in a gized permitting the pendulum to swing freely to path about the horizontal axis of the clutch part 30 a common starting point, and a trip means and attractable by the latter to rotate in syn adjustably mounted to be actuated by the pendu chronism therewith but freely returnable when lum after traveling with the electromagnet a released to a common starting point in its path predetermined distance commensurate with a of movement, means to induce attraction of the predetermined length of stock moved past the weighted element by the clutch part to rotate measuring station, Said trip means de-energiz therewith, and Switch means mounted adjacent ing Said electromagnet to release the pendulum Said guide means and actuated by the movement and to initiate an operation on the length of stock of the weighted element to a predetermined posi meaSured. - tion to cause its release from the clutch part when the stock has traveled a predetermined dis 40 ARTHUR, H, LONG. tance and to initiate another action related to the predetermined stock length. References Cited in the file of this patent 8. A machine for measuring lengths of stock moved past a measuring station comprising a UNITED STATES PATENTS wheel rotatably mounted at the measuring sta 45 Number Name Date tion and movable to engage and disengage the 1,259,968 Edwards ------Mar. 19, 1918. stock, a clutch part mounted for rotation on a 2,110,716 Rhea ------Mar. 8, 1938 given horizontal axis and connected to be driven 2,118,944 Purdy ------May 31, 1938 by said wheel, a weighted element, guide means 2,298,492 Longfield ------Oct. 13, 1942 to direct said weighted element to revolve in a 50 2,339,194 Reichelt ------Jan. 11, 1944 path about the horizontal axis of the clutch part 2,344,508 Giroll ------Mar. 21, 1944