US1573171A - Radioantenna - Google Patents

Description

Feb. 16 1926; 1,573,171

' F. R KRCNFOTH RADI QANTENNA Filed Feb. 12, 1925 I 3% @MM Glitch-V21:

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FRANK RQBEBT I'ZRONFOTH,

ST? ES 0:3 AI 'ISTEFUDAIVI, HEW YORK.

RADIGAEFTTENNA.

Application. filed February 12, 1925.

To all whom it may concern:

Be it known that I, FRANK Bonnier KRON- rorri, a. citizen of the United States, residing at Amsterdam, in he county of lilontgomery and State of New York, have invented certain new and useful Improvements in a ltadioantenna, of which the following is a specification.

The p esent invention relates to antennae particularly designed for radio receiving sets and aims to provide a device which increases the ca' acity of the straight wire antennae which now commonly used on house tops and the like by radio broadcast fans in their receiving sets. The aerial is designed for use where the space for stretching the antenna wire is comparatively small.

The invention further aims to provide a device of this nature which will clarify the radio frequency waves so as to in'iput the maximum energy into the antenna circuit of the receiving set.

A still further very important object of the invention is to provide a supporting structure in combination with an antenna which will compensate for the contraction and expansion of the antenna wire caused by the change in temperatures so that sale wire will be n'iaintainedin a substantially taut condition at all times.

A still furl-her object of the invention is to provide an antenna structure which is simple, cllicient, strong, d ble, inexpensive to manufacture, and otherwise well adapted to the purpose for which it is designed.

With the above and numerous other objects in view as will appear as the description proceeds, the invention resides in certain novel features of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing Figure 1 is an elevation of the antennae embodying the features of my invention, and

Figure 2 is a perspective view of one end thereof.

Referring to the drawing in detail it will Serial No. 8,?67.

be seen that l and 2 represent posts or other like 'upport having hooks 3 thereon. An insulator is enga ed with one hook and another insulator o is engaged on a cable 6 t -ined over a roller '4' supported in the i no 8 engaged with the hook 3 on post 1. This ca /file at its end may be fastened to the bottom of post 1 by any suitable means as at A pair of steel discs it) are provided with central openings for receiving eye bolts 11. Each disc 10 is provided with a series of apertures 12 which are arranged in pairs. In the present instance there are four pairs of these apertures on each disc arranged at er ual intervals thereaboutadjacent the edg Guy wires 13 are passed through the apertures 12. These guy wires are in the form of loops and are engaged with the insulators l and 5. The main antenna wire ll is attached to the eye bolts 11 and the cable 6 is then pulled so as to cause the loop guys 13 and the main antenna wire i l to become taut so as to talre the position shown in Figure 1. ll hen the cable 6 is pulled tightl v the discs 10 will be flexed to some extent so that if the wire expands these discs, bee-are of their resilient nature will still maintain the wire taut, and if the wire contracts because of the heat, these discs 10 will flex; further so as to take an excessive strain off the antenna wire. From the above it will be see have provide that I d an antenna which will provide ,ater capacitance than is possible with a sing e strand of wire and which this main antenna wire will-be maintained in a relatively taut position at all times under ordinary circumstances. It will also be seen that the antenna of this nature will clarify the signal.

It is apparent that the present embodiment of the invention which I have described by way of example attains all th features of advantage enumerated as desirable in the statement of the invention and the above description and that numerous changes in the details of construction, and in the combination and arrangement of parts may be i L; L L

resorted to Without departing from the spirit or scope of the invention as hereinafter claimed.

Having; thus described the invention what I claim is:

In an antenna structure, a pair of discs, each disc provided with a central opening and a plurality of apertures adjacent its periphery, eye bolts in the central openings, a Wire having its ends attached to the eye bolts, a pair of insulators, guy Wires passing through the apertures of the discs and engaged with the insulators.

In testimony whereof I afiix my signature.

FRANK ROBERT KRONFOTI-I.

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