Retractable helical antenna

Details Retractable helical antenna Retractable helical antenna

1994-08-19

1995-09-19

Hajec, Donald

Communications: radio wave antennas

Antennas

Spiral or helical type

343714, 343889, H01Q 736

Patent

active

054519748

ABSTRACT:
A retractable antenna assembly having a helically coiled antenna, a bushing having a helically threaded hole fully therethrough which freely engages the helical coil, and a driver to cause helical motion to the antenna relative to the bushing, and thereby extend or retract the antenna.

REFERENCES:
patent: 2953934 (1960-09-01), Sundt
patent: 2993204 (1961-07-01), Macalpine
patent: 3085215 (1963-04-01), Shepherd
patent: 4063206 (1977-12-01), Walker
patent: 5274393 (1993-12-01), Scott

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