Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1989-01-30
1990-01-23
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340461, 200 6188, 200 6191, 74473R, B60Q 100, H01H 316
Patent
active
048961353
ABSTRACT:
An electronic range indicator apparatus in which a switch array powered by the vehicle ignition voltage is used to indicate the selected transmission range during both on and off periods of the vehicle. During on periods of the vehicle, the ignition voltage is transmitted through the closed contacts (if any) of the switch array, and a decoder/driver module decodes the output of the switch array and lights the indicator indicia corresponding to the selected range. During off periods of the vehicle, the ignition feed to the switch array is open circuited. In such case, the decoder/driver module effectively grounds the ignition feed of the switch array, and lights the appropriate indicator indicia using an inverse logic decode scheme.
REFERENCES:
patent: 4037196 (1977-07-01), Atkinson et al.
patent: 4100530 (1978-07-01), den Brinker et al.
patent: 4199747 (1980-04-01), Miller et al.
patent: 4498359 (1985-02-01), Hara
Deeds Lisa D.
Lombardo Dennis M.
Crosland Donnie L.
General Motors Corporation
Navarre Mark A.
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