Variable-length antenna element

Details Variable-length antenna element Variable-length antenna element

1996-10-24

1999-02-02

Jillions, John M.

Winding, tensioning, or guiding

Reeling device

With spring motor

2423902, 343877, B65H 7548, H01Q 108, H01Q 112

Patent

active

058653902

ABSTRACT:
Continously variable-length antenna, operating in a wide frequency range that's simple, lightweight and reliable, and can be constructed by using a metal case-resided, coiled steel band spring returnable metal tape for the actual antenna, and pulling or releasing it by a thin insulating line. A strong, lightweight insulating tube, guiding the metal tape in its mechanical excursions, also provides for weatherproof construction. Remote controlling and an extremely wide range of antenna lengths can easily be realized.

REFERENCES:
patent: 1438290 (1922-12-01), Beakes
patent: 1860128 (1932-05-01), Bethenod
patent: 1913209 (1933-06-01), Nixdorff
patent: 2036456 (1936-04-01), Buschbeck
patent: 2276935 (1942-03-01), Como
patent: 2709220 (1955-05-01), Spector
patent: 2834012 (1958-05-01), Allen
patent: 3268903 (1966-08-01), Kuecken et al.
patent: 3541568 (1970-11-01), Lowenhar
patent: 4142693 (1979-03-01), Czerwinski
patent: 4434952 (1984-03-01), Czerwinski et al.
patent: 4972601 (1990-11-01), Bickford et al.
patent: 5221930 (1993-06-01), Scott
patent: 5370334 (1994-12-01), Shinkawa et al.

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