US2440597A - Television receiver antenna - Google Patents

Description

April 27, 1948. H. ATWOOD, JR 2,440,597

TELEVISION RECEIVER ANTENNA Filed Feb. 10, 1945 Patented Apr. 27, 1948 TELEVISION RECEIVER ANTENNA Horace Atwood, Jr., Bcllcvillc, N. 1., assignor to v Allen B. Du Mont Laboratories, Inc., N. J., a corporation of Delaware lassaic,

Application February 10, 1945, Serial No. 517,291-

v a home. I

In carrying out the invention two cones of conducting material are provided, each cone being approximately one-fourth as long asthe wave length that is to be received and having the diameter of its large end approximately one-eighth as much as said wave length. Each cone is mace of light weight insulating material coated on one or both sides with thin conducting material connected to a ring or collar at the small end thereof.

3 Claims. (Cl. 250-33) drawing, in which:

Fig. 1 is a side view of an illustrative embodi-- ment of the invention; and

Fig. 2 is a section on an enlarged scale along the line 2-2 of Fig. 1.

In the drawing, reference character I indicates a supporting rod which may be made of wood or other rigid material. Cones 2 and 3 of rigid insulating material are mounted upon the rod I at their small ends, and may be additionally supported at their large ends. Each cone 2, 3 is coated on the inside or outside, or both, with thin conducting layers 2 and 3' such as tin foil, aluminum foil or thin copper plating, for example. The conducting material is bonded at the small end thereof to metal rings 4 and 5, respectively, which fit tightly enough on the rod I to be held securely in position. Leads 6 and I extend from the rings 4 and 5, respectively, to the television receiver, not shown.

This antenna may be supported at both ends of rod l in any convenient way such as by placing the ends of rod I upon supports or suspending the same with cords or the like. Or it may be supported by a mast at the middle. It may be easily moved about and placed in an attic or storage room of a home where it is out of the way. 50

Heretofore antennas of this shape were made of solid cones or cones of sheet metal which made them very heavy or cumbersome. Such antennas are unsatisfactory because of the difliculty in moving them to the desired location or adjusting them to difierent positions for receiving television signals from diiierent directions.

By the present invention the proper shapes and sizes of such antennas are made available while retaining the efiiciency thereof. Since high frequency currents travel near the surface of conductors due to skin effect the conductor may be athin metallic coating without loss in efficiency.

-. What is claimed is:

1. A television antenna comprising a single integral central supporting rod of rigid material, cones of rigid insulating material each less than half the length of said rod supported on an intermediate fiortion of said rod at their small ends with a short space between said small ends, thin layers of conducting material coating said cones, and cylindrical metal rings on said red at the small ends of said cones on the outside of said rod bonded to said conducting material for making connection to a receiver.

2. The antenna of claim 1 in which said conducting material is applied to both the inside REFERENCES crrnn Number The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Von Arco et a1. Mar. 10 1931 Cork Apr. 4, 1939 Carter Oct. 10, 1939 Carter Apr. 8, 1941 Barrow Oct. 13, 1942 Southworth Feb. 20,. 1945 FOREIGN PATENTS Country Date Great Britain Mar. 17, 1939 Number

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