April 30, H. L, JENKINS ANTENNA SUPPURT Filed June 14, Sheets-Sheet ].

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1 April 30, H. L, JENKINS ANTENNA SUPPURT Filed June 14, Sheets-Sheet 1 I 7.29.].. n a l l

2 April 30, H, L, JENKINS 2,199,050 ANTENNA SUPPORT Filed June 14, 1957 ' s Sheets-Sheet 2

3 April 30, H. LIJENKINS ANTENNA SUPPORT Filed June 14, 1937 s Sheets-Sheet s L L i if N N- 4 I PD

4 _ ' Y I Patented Apr. 30, ,199,050 - UNITED STATES PATENT OFFICE Howard L. Jenkins, Spring?eld, Ohio Application June 14, 1937, Serial No. 148,171 8 Claims. (Cl ) taken through the center of rotation illustrating The invention relates to a mounting for an in section the means for rotatably mounting the antenna for both sending and receiving radios. frame and also for adjusting the angular position The principal object of the invention, generally of the frame with reference to a vertical'plane stated, is to provide an antenna mounting which I may be rotated through a complete circle at the passed through the center of rotation. Figure 5 is a cross section on the line 5-5 of wish or desire of the operator of the radio sta. Figure 2. tion so as to obtain a maximum e?lciency of the Figure 6 is a fragmentary view taken on line - antenna.. A still further object of the invention is to 10 provide an antenna comprising a hollow metal lic rod or bar having a length proportionate to the wave length of the station, the antenna pref erably comprising a plurality of such has ar ranged to project preferably in the same plane ll and in opposite directions and being rigidly sup ported at its point of maximum diameter, the rod or bar being so constructed and arranged as to be substantially rigid for its entire length. Still another object of the invention is to pro 20 vide a mounting for an antenna of the type de scribed which embodies a stand having a rotata ble frame mounted thereon, the frame constitut ing a support not only for the antenna but for similar bars or rods which are positioned in a 25 predetermined relation to the antenna so as to act as reflectors and directional means for the radio wave projected from the antenna. A still further object of the invention is to provide an antenna mounting including a stand 30 and a frame rotatably mounted ' thereon, the frame also being adjustable so that the angular position of the antenna means, the re?ecting means and the directional means may all be ad justed simultaneously with reference to a vertical 35 plane passed through the axis of rotation of said frame., Still another object of the invention is to pro vide means for rigidly connecting a rod antenna to an insulator so as to provide a simple and ex tremely rigid mounting for the rod so that the same may project from the insulator for sub- stantially its entire length. Other objects of the invention will be apparent from the detailed description of the embodi 45 ments of the invention which are illustrated on the accompanying drawings in which Figure 1 is a top-plan view illustrating one embodiment of the invention. Figure 2 is a side elevation of the structure. 50 shown in Fig. 1. Figure 3 is a transverse vertical section taken on line 3-3 of Figure 1, the direction of view being indicated by the arrows adjacent the ends of said section line. '5 Figure 4 is a transverse vertical sectional view 6--6 of Figure 4. ' Figure 7 is a fragmentary view taken on line ' of Figure 4, illustrating a means for con necting the hollow antenna rods to the insulator members carried by the rotatable frame. Figure 8 is a fragmentary sectional view taken on line 8-8 of Figure 4. _, Figure 9 is a plan view of one of the antenna rods, portions of which are broken away. Figure 10 is a cross sectional view of the rod taken on line lli l0 of Figure 9. Figure 11 is a top plan view of a slightly modi- go '?ed form of the invention. Figure 12 is a side elevational view of the same. ' Throughout the specification and drawings like numbers designate like parts., The numeral l designates a frame which may 95 be mounted on any desirable foundation, that is either upon the ground or upon the roof of a building so as to form a support for the antenna frame 2. Illustrated in the drawings, the frame 2 is supported upon the frame I by a base mem- 30 her 3_which is mounted for rotation upon the frame I by means of a spindle 4 which carries at opposite ends bearings 5 and 6 and to which spindle is rigidly secured a hand-wheel or pulley - I by which the spindle 4 may be rotated so as to 35 rotate the base 3 and frame 2 in any desired angular relation to the frame I, thev spindle being provided at its upper end with a collar 8 rigidly connected to the spindle 4, which collar is in turn bolted to the base member 3 by means 40 of the bolts 9, the base 3 being in turn bolted to the frame 2 in any desired manner. The base 3 may be provided, as shown in Figure 4, with upper and lower sections 3 and 3b which are hingedly secured to each other by means of the 45 hinge l0 and which'are maintained in any de sired position by means of the bolt H and the wedge I2, the bolt ll being adapted to pass through the enlarged openings l2 in the upper member 38L so that the upper member may 50. change its angular relation to the bolt without binding thereon. In order to adjust the angular position ofthe parts 3a and 3b a lock nut l3 on the bolt II is released and the wedge I! moved inwardly or outwardly until the desired 55

5 2 angular relation is obtained, whereupon the ser rated edges formed on the upper surface of the wedge will interlock with the corresponding notches formed on the lower face of the member 3 to maintain the wedge in its position and the lock nut I3 is then retightened to maintain the parts in this position. The spindle I4 is secured to the frame I by' providing the outer casing or bearing housing I! 10' with a plurality of collars l5 and I6 which are secured to the casing l4 and, after being ad justed to embrace a horizontal member ll of the frame I, are bolted thereto, as clearly indicated in Figure 4. The frame 2 preferably comprises a pair of parallel bars I8 which are preferably braced at points intermediate their ends by transverse bars l9. In the form of the invention shown in Fig ures l to 10, inclusive, I provide the frame 2 with further transverse connecting members 20, three of which are shown in Figure 1. Mounted adja-. cent the ends of these members 20 are insulators 21. These insulators are, for convenience only, illustrated as a, pin type insulator and are each provided with a socket to receive a pin by which, they are rigidly mounted in respect to a base..they are preferably provided with a plurality of skirt portions so as to increase the leakage dis tance between the conductor and the base. In 30 the particular form of the invention here illus trated I utilize the usual conductor groove formed on the upper surface of these insulators to receive the end of the antenna bar 22 and in order to secure the bar rigidly to the insulator I provide two clips 23 and 24 which are preferably duplicates, each clip being provided with an up standing arm 25 terminating in a loop through which the bar 22 is adapted to pass. The clips 23 and 24 are secured to the insulator body by bolts and nuts 26, the maximum diameter of the opening formed by the semi-circular portions of the clips 23 and 24 being substantially the same as the cross-sectional diameter of the por tion of the insulator/to which the clips are bolted. By tightening the bolts 26 it is therefore possi ble to rigidly secure each rod 22 to its adjacent insulator. While for convenience I have referred to the rods 26 as antenna, it is obvious that these rods form antenna only when they are electrically connected to the station or radio set and where used either as re?ectors or as directional means they differ in no respect from the rods used as antenna except that when used as re?ectors or directional means they are insulated from and not electrically connected with the set or station. It has been common practice to use wires for both re?ectors and antennas but wires being?exible must be supported at oppositeends and despite all efforts, wire, when supported at its opposite ends, will take the form of a catenary curve. It is desirable to provide members both for antenna and for re?ecting or directional means of substantially rigid form in order that they may be supported by means positioned at one end only, and this I accomplish by utilizing hollow rods which are formed preferably of steel although certain alloys may be substituted there for if desired. These rods are provided with a plurality of tapered sections, indicated by the reference character 21, which terminate at op posite ends in the straight sections 28, the straight sections being adapted to telescope with a portion of the adjacent straight section, as clearly illustrated both in Figures 9 and 10. The 2,199,050 rods are therefore adapted to be built up in sec tions, each section being preferably formed by a die-pressing operation, the entire rod, therefore, being substantially rigid and exceedingly light. By mounting the rods uponthe frame 2, as has been hereinbefore described, I form a balance member since the weight of one rod is counter balanced by the weight of the opposite rods and by connecting the rods in pairs to the frame at their points of maximum diameter I form an antenna whose. power' absorption co-e?lcient is reduced to a minimum. Where a plurality of rods are employed, such as illustrated in Figure 11, they are preferably positioned on opposite sides of the center of rota tion and at a predetermined distance from the center of rotation. One of said pairs of rods beng electrically connected to the station, serves as antenna means and a second pair being in sulated from the frame and station to serve as, re?ector means. It will, of course, be under stood that the length of the rods and their posi tions in respect of the center of rotation is de pendent upon the wave length of the station and with a given wave and a given power, the length of the rods and their positions are a matter of mathematical calculation. In the form of the invention shown in Figures 1 to 3, inclusive, I provide the frame 2 with a vertical upright 29 which is adequately braced by the diagonal members 30 and at the upper and lower extremities of the frame I provide members similar to the members 20 having in sulators 2 connected thereto in pairs, each of the insulators being adapted to support the inner end of a rod 22. In this particular embodiment the rods 22 which are adjacent the pivotal center of the frame 2 are preferably utilized as the antenna means. The rods 22' adjacent the left hand extremity of the frame 2 are used as direc tional means while the rods 22 at the ends of the frame 29 and at the right-hand end of the frame 2 are re?ecting means which determine the dis tribution and intensity of the waves generated in the antenna rods 22. Other positions of the di rectional and reflector rods may be utilized with out departing from the scope of my invention. Having thus described my invention, what I claim is: l. A mounting for an antenna including a stand, a frame member rotatably mounted there on, said member extending on opposite sides and at the point of rotation thereof, a plurality-of insulators carried by said member adjacent each end thereof, and a pair of tapering hollow metal lic antenna members each of which is mounted on one of said insulators, each pair of antenna members extending in opposite directions from and transversely of said rotatable member. 2. A mounting for an antenna including a suitable support, a frame rotatably mounted thereon, a plurality of pairs of insulators carried by said frame, and a plurality of pairs of taper ing hollow metallic members, each of said taper ing members being rigidly connected to at least one of said insulators adjacent its point of maxi mum diameter, the members of each pair ex tending in opposite directions. 3. A mounting for an antenna including a suitable support, a frame rotatablylwmounted thereon, a plurality of pairs of insulatgiis carried by said frame, and a plurality of pairs of taper ing hollow metallic members, each of said taper ing members being rigidly connected to at least one of said insulators adjacent its point of maxi

6 ,199,050 mum diameter, said tapering metallic members extending substantially at right angles to the major axis of said frame,_the members of each pair extending in opposite directions. 4. A mounting for an antenna including a suitable support, an elongated frame pivotally mounted on said support adjacent its center, a plurality of pairs of insulatorsrigidly mounted onsaid frame, said pairs of insulators being ar ranged adjacent the opposite ends of said frame, hollow metallic members each of which is rigidly connected to one of said insulators of each pair, each pair of metallic members extending trans versely of said frame, one pair of said hollow metallic members being adapted to act as an antenna.. 5. A mounting for an antenna including a stand, a frame pivotally and rotatably secured to said stand, a plurality of pairs of insulators mounted on said frame, a plurality of hollow rigid bars, each of said bars being rigidly con nected to at least one of said insulators of each pair, and means for causing one pair of said bars to act as an antenna and another pair of said bars to act as a re?ector. 6. A mounting for an antenna including a sup port, a frame carried by said support, a plu rality of spaced pairs of insulators carried by said frame, certain of said pairs of insulators being arranged in vertical alinement and in spaced relation to the horizontal plane of said frame, a plurality of hollow metallic bars, each of said bars being connected to an insulator, each pair of bars being adapted to extend in opposite directions from and transversely of said frame, each of said bars being tapered, the larger end of each bar being secured to at least one of said insulators. 7. A mounting for an antenna including a support, a frame carried by said support, a plu rality of spaced pairs of insulators carried by said frame, certain of said pairs of insulators being arranged in vertical alinement and in spaced relation to the horizontal plane of said frame, and a plurality of hollow metallic bars, each of said bars being connected to at least one insulator, each pair of bars being adapted. to extend in opposite directions from said frame, each of said bars being tapered, the larger end of each bar being secured to said insulators, and said bars being adapted to extend at an angle.to a vertical plane passed through the longitudinal axis of said frame. 8. A mounting for an antenna including a sup port, a frame carried by said support, a plurality of spaced pairs of insulators carried by said frame, certain of said pairs of insulators being arranged in vertical alinement and in spaced relation to the horizontal plane of said frame, and a plurality of hollow metallic bars, each of said bars being connected to at least one in sulator, each pair of bars being adapted to ex tend in opposite directions from said frame, each of said bars being tapered, the larger end of each bar being secured to said insulators, said bars being adapted to extend substantially at right angles to a vertical plane passed through the longitudinal axis of said frame, one pair of said bars being adapted to serve as an antenna, and the other pairs of bars serving as directional and re?ective means respectively for waves gen erated in said antenna. - HOWARD L. JENKINS $0 85