Mechanism for controlling electrically driven antenna
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 8, 1991
Grant Date -
N/A
app pub date -
Jul 18, 1988
filing date -
Jan 16, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control apparatus is placed in a drive circuit of a motor of an electrically driven antenna. The drive circuit is provided in parallel with a transmitter-receiver circuit of a transmitter-receiver, and an operation unit is provided so that control instruction can be given by manual operation to a control apparatus. The electrically driven antenna is extended or contracted by an amount determined by the instruction that is given from an operation unit interlocked with a turn-on or off of the power source of a transmitter-receiver. The control apparatus includes, for example, switch plates which are moved by a small motor. Variable contact pieces for the switch plates are adjusted by a manual operation unit to obtain a suitable control instruction through mechanical operation. Alternatively, the control apparatus can be operated electrically by using a control circuit and operation unit. The control apparatus can be placed inside and mounted on a car, and the amount of extension or contraction of the antenna can, selected as is necessary, by the operation unit.
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Cited Art Landscape
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