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Publication numberUS2875441 A
Publication typeGrant
Publication dateFeb 24, 1959
Filing dateOct 14, 1954
Priority dateOct 14, 1954
Publication numberUS 2875441 A, US 2875441A, US-A-2875441, US2875441 A, US2875441A
InventorsMcgrane James A
Original AssigneeMcgrane James A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Twin multiple loop television antenna
US 2875441 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 24, 1959 J. A. MCGRANE Q 2,875,441

TWIN MULTIPLE LOOP TELEVISION ANTENNA Filed Oct. 14, 1954 I N V EN TOR. @7155 j: fl y Z542 C /Mi United States Patent 'Ofiice ,1

1 2,875,441 TWIN MULTIPLE L001 TELEVISION ANTENNA James A.Mc Grane, ssining, N. Y.

7 Application 0etoben14, 1954, Serial No. 462,250

3 Claims. (Cl. 343-806 This invention relates to television antennas.

It is an object of the present invention to provide a twin multiple loop antenna for television sets which will, in most instances, eliminate the need for a roof antenna within a radius of fifty miles from a transmitting station.

It is still another object of the present invention to provide a twin multiple loop antenna of the above type which may also be used as a roof antenna when increased in size.

Other objects of the present invention are to provide a television antenna bearing the above objects in mind 25 which is light in weight, of simple construction, inexpensive to manufacture, has a minimum number of parts, may be used in any place desired, is efficient in use and operation.

For other objects and a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Figure 1 is a perspective view of a preferred embodiment of the invention shown in operative use with a television set;

Fig. 2 is a front elevational view of the invention shown alone, shown partly in section before orientation of the loops;

Fig. 3 is a vertical sectional View taken along the line 3-3 of Fig. 1 after orientation of the loops; and

Fig. 4 is an exploded perspective view of the two contact mounting plates forming a part of the invention.

Referring now more in detail to the drawing, 10 represents a television set having the usual screen 11, substantially as illustrated.

In the practice of my invention, a twin multiple loop antenna is provided and includes a television mast 12 extending upwardly from a mounting stand 13 of any suitable construction. 0

A rectangular mounting plate 14 having a central opening 15 (Fig. 4) is secured to the upper end of the mast 12 by means of a screw 16, the mast 12 being formed of wood. A lock washer and a plain washer, not shown, may be provided intermediate the mast 12 and the plate 14, to permit the rotational movement thereon of the plate while at the same time fixedly retaining its adjustment until moved manually.

The plate 14 is provided with a pair of oppositely disposed elongated slots 17 for adjustably securing the upper ends of the wings or loops 18 of aluminum tubing by means of bolts 19 and wing nuts 20, the bolts 19 passing downwardly through the slots 17 and suitable openings provided in the flattened ends of the wings 18 and receiving upwardly thereon the wing nuts (Fig. 2).. 65

A lower rectangular mounting plate 21 of Bakelite or other electrically non-conductive material is provided with a central opening 22 which slidably receives therethrough the mast 12. The plate 21 is provided with the oppositely disposed elongated slots 23 to which the lower ends of the wings or loops 18 are secured by means of the bolts 24 and wing nuts 25, the wing nuts 25 now being Patented Feb. 24, 1959,

disposed uppermost. Conductors 26 are connected to each of the bolts25 and extend to the terminals of the television set 10, being provided with an insulated covering 27 (Fig.1).

Afterthe loops, plates and mast are assembled as. shown in Fig. 2, the individual loops maybe adjusted to the orientation of Fig. 3 until the best reception is attained, using the trial and error method. After the proper orientation is achieved, a plastic envelope 28 having an open bottom may be lowered downwardly onto the antenna so as to conceal the same, the envelope 28 being provided with an attractive design 29 for ornamental purposes.

The antenna, if desired, may be mounted directly on the back of the television set, as will be obvious.

The reception may be improved by widening or narrowing the overall length of the loops 18. Or, the wing nuts at the top and bottom may be loosened to permit the longitudinal adjustment of the ends of the loops 18 within the elongated slots. The reception may also be varied by loosening the wing nuts and bending the Wings 18 backwardly and then tightening the nuts again. The entire assembly may be rotated about the mast 12 for further adjustment.

The antenna is light, its installation very simple and the upkeep thereof extremely low, except perhaps for a change of cover when desired. The antenna has the further advantage in that the owner of the set cannot be charged a rental for a master antenna ordinarily located on the roof of the apartment house or the like. The antenna, if desired, can be hung on the wall or hung in a closet or an attic. Furthermore although in the drawing the loops have been shown as having rounded ends, it will be readily apparent that rectangular formations may be employed. Also, the loops 18 themselves may be formed of a solid bar of material.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

Having thus set forth and disclosed the nature invention, What is claimed is:

l. A television antenna comprising a mast, a pair of wings of elongated material each formed with a plurality of vertically spaced and substantially horizontally extending U-shaped loops lying in a single plane and having their central portions staggered alternately with respect to each other, each of said wings being disposed on opposite sides of said mast, and defining a single plane therewith, means for mounting the upper ends of said wings upon said mast for rotation about a vertical axis, and electrically connecting the same, insulator means for rotatably mounting the lower ends of said Wings to said mast for rotation about said vertical axis, and including means for connecting the antenna to the television set, said means for securing the upper ends of said wings to said rod comprising a flat plate of electrically conductive material having a central opening therethrough, screw means passing through said opening and engaging the upper end of said mast, said plate having oppositely disposed elongated slots, the upper ends of said wings having openings adapted to be aligned with said slots,

of my bolts passing downwardly through said slots and the.

openings in said wings therebelow and wing nuts on the 'lower ends of said bolts.

2. A television antenna according to claim 1, including washer and lock washer means on said screw intermediate said plate in the upper end of said mast whereby to permit said plate adjusted position.

3. A television antenna according to claim 2, said means for mounting the lower ends of said wings and for to be rotated and to retain its connecting the same to the television set comprising a flat plate of electrically insulated material having a central opening rotatably receiving said mast therethrough, said plate having oppositely disposed elongated sl'ots, the lower ends of said wings having openings therethrough adapted to be aligned with said slots on the undersurface thereof, bolts passing upwardly through said openings and slots and wing nuts on the upper end of said bolts, said bolts being connected to the antenna terminals of the television set, by conductors.

References Cited in the file of this patent UNITED STATES PATENTS Carnes Apr. 9, 1861 Athearn Apr. 13, 1909 Harms June 30, 1931 Green June 30, 1936 Leib July 7, 1936 Fulop Ian. 11, 1955 Middlemark Feb. 5, 1957 FOREIGN PATENTS Germany ...Dec. 20,1951 Switzerland May 16, 1947

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US31953 *Apr 9, 1861 oaenes
US918255 *May 23, 1908Apr 13, 1909Henry E AthearnAntenna for wireless telegraphy.
US1812695 *Apr 12, 1926Jun 30, 1931Harms Albert GLoop aerial
US2045987 *Dec 8, 1933Jun 30, 1936Rca CorpDirectional aerial system
US2046473 *Oct 6, 1933Jul 7, 1936Telefunken GmbhDirection finder antenna
US2699348 *Oct 14, 1953Jan 11, 1955Charles FulopMeans for securing a tubular crossarm to a support
US2780808 *Dec 15, 1953Feb 5, 1957Middlemark Marvin PHigh frequency antennas
CH244731A * Title not available
DE825433C *May 4, 1950Dec 20, 1951Hans SchierenUnterleg-Filzmatte mit eingelegter Ultrakurzwellen-Faltdipolantenne fuer Rundfunkempfangsgeraete
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3167775 *Sep 29, 1960Jan 26, 1965Rudolf GuertlerMulti-band antenna formed of closely spaced folded dipoles of increasing length
US3229298 *Nov 27, 1962Jan 11, 1966Morgan Dean OBent-arm multiband dipole antenna wherein overall dimension is quarter wavelength on low band
US3716861 *Mar 22, 1971Feb 13, 1973Root JSerpentine antenna mounted on a rotatable capacitive coupler
US4318109 *May 5, 1978Mar 2, 1982Paul WeathersPlanar antenna with tightly wound folded sections
US4872022 *Apr 9, 1987Oct 3, 1989Schock Edward JSupport and connection means for looped antenna conductors
US4987424 *Nov 13, 1989Jan 22, 1991Yagi Antenna Co., Ltd.Film antenna apparatus
U.S. Classification343/806
International ClassificationH01Q9/26, H01Q9/04
Cooperative ClassificationH01Q9/265
European ClassificationH01Q9/26B