Communications: electrical – Selective – Having indication or alarm
Patent
1975-05-12
1978-02-07
Caldwell, John W.
Communications: electrical
Selective
Having indication or alarm
307 10R, 340324B, 340414, G08B 1900
Patent
active
040729249
ABSTRACT:
A system displays messages one at a time to inform a vehicle operator of malfunctions or other events occurring in a vehicle with priority being given to the event of most importance whenever more than one event is sensed concurrently. A display device then selects messages for display and code switches are actuated to provide a unique electrical code signal for each message to indicate to the system which message is selected at a given moment. A number of sensors in the vehicle each respond to an event and an electrical sensor signal of unique value is provided for actuation of each sensor switch. A circuit compares the code signal with the sensor signal to drive the display device to select another message when the two signals are not in harmony and to display the selected message when the two signals are in harmony. A provision is made to render a sensor switch ineffective to affect the sensor signal when a sensor switch of higher priority is concurrently actuated.
REFERENCES:
patent: 2504965 (1950-04-01), Davis
patent: 3124792 (1964-03-01), Thaler
patent: 3158849 (1964-11-01), Thaler
patent: 3582949 (1971-06-01), Forst
patent: 3798596 (1974-03-01), Sumiyoshi et al.
patent: 3879704 (1975-04-01), Noji
patent: 3988730 (1976-10-01), Valker
Caldwell John W.
General Motors Corporation
Hill Warren D.
Nowicki Joseph E.
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