Car antenna system with bimetallic control means

Details Car antenna system with bimetallic control means Car antenna system with bimetallic control means

1978-07-18

1980-02-26

Moore, David K.

Communications: radio wave antennas

Antennas

Rod type

343901, H01Q 110

Patent

active

041908414

ABSTRACT:
A car antenna system comprises an expansion-type antenna element, a driving wire with one end connected to the driving end of the antenna element, a wire transfer mechanism to expand and contract the antenna element by transferring the driving wire in the longitudinal direction thereof, a motor for driving the wire transfer mechanism, a driving power supply circuit including a first power supply circuit for rotating the motor in one direction and a second power supply circuit for rotating the motor in the opposite direction, and first and second circuit breakers connected, respectively, to the first and second power supply circuits for breaking overcurrent flow in each corresponding power supply circuit when the antenna element reaches the expansion or contraction limit.

REFERENCES:
patent: 3143696 (1964-08-01), Harris
patent: 3893125 (1975-07-01), Bellomayre

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