Antenna relay method and apparatus

Details Antenna relay method and apparatus Antenna relay method and apparatus

1986-10-02

1987-06-09

Shoop, Jr., William M.

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318266, 318286, 318468, 307 10R, H02P 122

Patent

active

046722785

ABSTRACT:
An antenna motor drive system for raising and lowering an antenna. Response to a user input for raising or lowering a vehicle antenna is delayed to avoid rapid reversals of the antenna drive motor. This avoids the large surge currents associated with the prior art. The circuit monitors drive circuit response and de-energizes the motor if an inappropriate response is sensed after a certain period. Use of switching transistors rather than a relay facilitates implementation of the invention in integrated circuit form.

REFERENCES:
patent: 4303872 (1981-12-01), Alf et al.
patent: 4330782 (1982-05-01), Hashimoto et al.
patent: 4338552 (1982-07-01), Pilz et al.
patent: 4347465 (1982-08-01), Goertler et al.
patent: 4459521 (1984-07-01), Barge
patent: 4514670 (1985-04-01), Fassel et al.

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