G. WON ARC0. PORTABLE STATION FOR TELEGRAPHY, APPLICATION FILED 0GT, 31, 1907, Patented May 17, 1910.

leg. 446, asy22 UNITED STATES PATENT OFFICE. GEORG WON ARCO, OF , . PORTABLE STATION FOR WIRELESS TELEGRAPSY. 958,209. Specification of Letters Patent, Patented May 1, 1910, Application filed October 31, 1907. Serial No. 400,095. To all whom it may concern: The separate wires e extend from the top Be it known that I, GEORG voN ARCO, of the mast radially obliquely downward a subject of the King of , residing and are stretched toward the ground by at Berlin, Germany, have invented certain cords d with which they are connacted. For 80 new and useful Improvements in a Port the sake of simplicity the umbrella antennae able Station for Wireless Telegraphy, of also serve for erecting the mast and main which the following is a full, clear, and taining it ereet. In order to insure the exact description, reference being had to the position of the mast stay cords f may also accompanying drawing, forming a part of be employed. In the present case, instead 65 10 this specification. of the earth serving as counter capacity, a This invention relates to portable sta surface capacity which is formed of several tions for wireless telegraphy, which are wires g distributed around the mast and characterized by the aerial conductor and radially arranged relative thereto, is em also the masts serving for carrying the same ployed. These radial wires are well in 70 5 being composed of several sections adapted sulated from earth and run parallel thereto; to be readily put together and taken apart they are disposed around the mast and at and which, in a collapsed condition, are tached to a central ring 2 which is connected easily portable. with the mast through insulators such as The invention consists more particularly shown in Fig. 2. Thus the radial wires are 75 20 in a system of aerial conductors arranged connected with each other. like an umbrella carried by a mast com The apparatus r, 8, for wireless telegra posed of separately collapsible parts. The phy, which may be of any known type, is mast is insulated from earth and as a coun connected, also in well known manner, be ter capacity a surface capacity formed of tween the aerial conductor system and the 30 25 wires is preferably employed. The appa counter capacity g, above mentioned, in ratus for wireless telegraphy is connected in well known manner. I have diagrammatic between the aerial conductor system and the ally illustrated such an apparatus in its counter capacity. The use of an umbrella general form, whereins represents the send antennae system which, as is well known, has ing circuit and r the receiving circuit. Both 85 30 a very high capacity, has the advantage of circuits may be alternately thrown into cir requiring only one mast for its support, cuit with the antennae and counter capacity which mast in consequence of the sym by means of a switch i. All these features, metrical arrangement of the umbrella an however, do not form part of my inven tennae may be made comparatively thin and tion but are merely represented so as to indi 90 35 light, as it is only subjected to pressure. cate how my invention may be operated in From this will be readily seen the practical practice. importance of the result, which the use of The arrangement of a counter-capacity an umbrella antennae in its combination with insulated from the earth has as is well an easily dismountable or collapsible mast known the advantage of rendering it inde 40 composed of separate parts affords in its use pendent of a more or less good earth connec for portable stations. tion, and consequently of the variation in A form of construction of the invention is the damping of the aerial conductor system shown in the accompanying drawing, in thereby caused. It is essential particularly which: for portable stations which are to be rapidly 00 45 Figure 1 is a side elevation of my im erected at any suitable place and then rap proved station, and Fig.2 is a detail plan idly brought into a condition for operation to view of the connection of the counter capac be independent of the earth and its resist ity with the mast. ance, so that always a uniform damping of a is a mast composed of several sections. the oscillation system can be counted upon. 05 50 The separate sections consist preferably of Having explained my invention, what I steel or magnalium, and are held together do claim and desire to secure by Letters Pat by means of short sleeves a'. The mast is ent is: insulated from earth by an insulating sup 1. A portable station for wireless telegra port, for instance a block of marble b, or phy consisting of a metal mast composed of 0. 55 in other manner, and has at its upper end several easily dismountable sections and in the umbrella antennae formed of wires c. i sulated from the ground, an umbrella 33 958,209 shaped aerial stretched between said mast said mast, insulators fastened to said ring and several distant points on the ground and to said mast holding said ring concen but insulated from the latter, a counter ca trically with the mast and wires attached to pacity formed of wires disposed radially said ring and radiating therefrom and fas- : around the mast and insulated therefrom tened at their free ends to the ground but in and from the ground, and the apparatus for sulated therefrom, the EPE for wire wireless telegraphy interposed between the less telegraphy interposed between the aerial aerial and the counter capacity. and said counter capacity. 2. A portable station for wireless telegra In witness whereof, I hereunto subscribe O phy consisting of a metal mast composed of my name this 16th day of October A. D. several easily dismountable sections, and in 907. sulated from the ground, an umbrella shaped aerial stretched between said mast GEORG WON ARCO. SEPseveral distant points on the ground hut Witnesses: 15 insulated from the latter, a counter capacity HENRY HASPER, comprising a conductivity ring surrounding WoLDEMAR HAUPT.