Telescoping antenna movable by means of a d.c. motor

Details Telescoping antenna movable by means of a d.c. motor Telescoping antenna movable by means of a d.c. motor

1979-07-13

1981-12-01

Weldon, Ulysses

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318280, 318282, 318266, 318293, H02P 100

Patent

active

043038727

ABSTRACT:
An antenna control system employing a d.c. motor for extending and retracting a telescoping antenna for use on a vehicle. The control system comprises a polarity responsive timer, a polarity reversal switch, and a switching device. In one position of the switching device, a d.c. voltage of a polarity determined by the position of the polarity reversal switch is connected across the motor for an interval of time determined by the timer to extend or retract the antenna. In the other position of the switch, the vehicle operator controls the motor and therefore the antenna position.

REFERENCES:
patent: 2933597 (1960-04-01), Jensen
patent: 3022420 (1962-02-01), Brinkerhoff
patent: 3568024 (1971-03-01), Robbins
patent: 4138630 (1979-02-01), Graham

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