Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1995-08-17
1996-12-17
Hofsass, Jeffery
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340455, B60Q 1100
Patent
active
055857817
ABSTRACT:
In a device for detecting the operative states of switches, a common switching device 17 is connected in series with input resistors 16, and currents flowing into switching circuits are cut off when it is judged based on the states of switches 10 to 15 that a vehicle is being parked. Further, a detector 19 is so set as to perform its detection only at specified intervals. The switching device 17 is turned on at the detection timing of the detector 19 and is, when the detector 19 performs no detection, turned off so as to prevent the currents from flowing into the respective switching circuits. With the above construction, the currents flowing into the switching circuits can perfectly be cut off while the vehicle is being parked, and the input resistors in use are less than in the prior art. Further, since the currents flow through the input resistors at specified intervals, an average power consumption of each input resistor can be reduced, enabling the use of input resistors having a low rated power.
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Casella Anthony J.
Edwards, Jr. Timothy
Hespos Gerald E.
Hofsass Jeffery
Sumitomo Wiring Systems Ltd.
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