US1860652A - Radio aerial - Google Patents

Description

RADIO AERIAL Filed July 1, 1929 Patented May 31, 1932 UNlT'ED STATES P ENT o r-r1 cs EDGAR s. BROWN, or woncn's'rnn, mnssaoiiusn'rrs RADIO AERIAL Application filed July 1,

This invention relates to an aerial for use with radio receiving apparatus.

The principal objects of the invention are to provide a radio aerial in such form that it will take up comparatively little room so that a number of them can be mounted on the roof of a building, particularly an apartment house; to provide means whereby each element of the aerial constitutes an induction coil and to provide the windings in such relation to each other that they will not interfere with each other but will cooperate so that the entire length of the wire on the device will be available for the purpose of intercepting and transmitting the vibrations ing in the direction of the arrow in Fig. l

and showing only a part of it and having part of it broken away to show interior construction.

The problem of placing a plurality of straight aerial wires on the roof of a hotel or apartment house has become quite serious. With so many wires, they interfere with each other and the reception is poor on all of them usually. The conditions are such that in some cases good reception cannot be secured by some of the receiving sets.

The principal object of this invention is to avoid this difficulty by providing a form of aerial which can be placed outdoors on the roof and will not be injured by rain or snow and which will permit the employment of a wire longer than would ordinarily be set up and yet occupy very little space. It also is capable of being turned to proper position for reception and elimination of interference and then secured in that position. This aerial provides practically no wind resistance when placed in proper position and therefore it can be used under the body of an aeroplane.

This is a very simple device and comprises 1929. Serial No. 375,094;

a support or post which preferably is arranged in vertical position: and is provided with a circular reduced endll, at the bottom of which is a shoulder on which rests a polygonal plate 12 other non-conducting material. This plate 12 obviously can be turned. about the reduced end 11 to any position in which it is found. that the reception is best and then the parts can be fastened permanently in that position,

as by means of. a screw 13..

The wooden center l2'is shown as six-sided, but someothernuinber of sidesmay be more convenient in some cases. From each side projects a rod ll radially. Each of these 65 rods isof wood or other insulating material. covered with paint or other coating to protect itfrom the weather. (En-these rods is'wound the aerial 15 which consists of a wirecovered with rubber. or other insulation to protect it from the weather. This wire is wound around one ofv these rods and then drawn through a perforation 16 near its end and then passes in the form of a straight strand 7 through a perforation 16 in the end of. the 75 next rod. 1.4.. Then it is woundaround that rod. It is to be noticed that the wire is woundzfrom the inner end of the first-named rod 14: to the outer endand from'the outer end to the inner end of thesecond rod and it will also be noticed that these two adjacent windings'are in opposite directions; When used as an aerial, eachwinding constitutes an induction coil,- but they do not. interfere'because the adjacent ones are wound in opposite directions.

The aerial wire 15 is brought through a hole 18 inthe plate 12 at the corner'and then wound on two other rods linzthesame way. In this way, whether there are three pairs or any other number, the windings are wound on in pairs and finally the end of the same wire is brought out, near the place where the first winding started, through perforations 18. All these perforations 16, 18 and 19 are made for the purpose of firmly holding the coils in position, so that they will not uncoil under any conditions. The perforations 18 are made U-shaped, as shown 1n Fig. 2, so 16% as to more firmly hold the wires in position.

which may be of wood or In this way it will be seen that the wire of the aerial is firmly held in position; that. the full length of the wire is available for the purpose of receiving the vibrations from the air, and that it is located in a very small compass and a large number of these aerials can be placed in proximity to each other on a roof or elsewhere. On account of the shape of the whole device and the induction coils, of which it is formed, one aerial is not likely to interfere with another in any way if placed a few feet apart. Therefore each instrument will receive the waves in a comparatively clear and uninterrupted manner.

Although I have illustrated and described only one form of the invention, I am aware of the fact that modifications can be made therein by any erson skilled in the art without departing rom the scope of the invention as expressed in the claims. Therefore,

I do not wish to be limited to all thedetails of construction herein shown and described, but

what I do claim is 1. As an article of manufacture, a receivlng I aerial for radio purposes comprising a support having a plurality'of sides, an insulating rod projecting from each side in a radial direction, an aerial wire wound around said rods in the form of coils and in regular order, every two adjacent coils being wound in opposite directions, the rods having perforations therethrough at each end for receiving the wire and holding it in position on the rod. and the central support having an irregular perforation therein through which the wire passes between twoof said rods to hold the wire againstmoving from one rod to the next one, and the wires extending across from the perforations in the extremities of adjacent rods.

2. As an article of manufacture, a receiving aerial for radio purposes comprising a support having a plurality of sides, an insulating rod projecting from each side in a radial direction, an aerial wire wound around said rods in the form of coils and in regular order, the central support having means through which the Wire passes between two of said rods to hold the wire against moving from one rod to the next one, and the wires extending across from the extremities of adjacent rods.

In testimony whereof I have hereunto affixed my signature.

EDGAR S. BROWN.

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