Rotary switch device for automotive transmission control
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United States of America Patent
Stats
-
Mar 29, 1983
Grant Date -
N/A
app pub date -
Jun 22, 1981
filing date -
Jun 22, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrical switch device manually operable, by a rotatable knob, to a plurality of definable positions for selectively effecting operation of an automotive transmission to a desired gear ratio. The knob and a housing, which includes the switch, may be mounted any place in the vehicle cab within convenient reach of the operator. The switch device is connected to an electronic logic system which monitors the condition of the transmission at all times to either energize or deenergize a lock-out solenoid, which controls a latch mechanism. Depending upon the condition of the transmission and, therefore, of the solenoid, a latch mechanism either permits or inhibits operation of the knob. An override mechanism permits the operator to release the latch mechanism to permit operation of the knob and the switch for shifting of the transmission, in an emergency situation, notwithstanding that the latch mechanism is in a locked position.
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