Communications: electrical – Selective – Having indication or alarm
Patent
1976-10-18
1977-12-27
Waring, Alvin H.
Communications: electrical
Selective
Having indication or alarm
307 10R, B60C 2302
Patent
active
040657515
ABSTRACT:
A circuit is provided for a tractor/trailer combination to provide a warning in the tractor of an event such as low tire pressure occurring at the trailer utilizing only conventional wiring connections between the tractor and trailer. When low tire pressure occurs, a flasher circuit on the trailer flashes the trailer marker lamps which are normally energized so that the flashing lamps are visible to the operator. The electrical pulses in the marker lamp circuits are sensed by a detector in the tractor to illuminate an indicator lamp in the tractor.
REFERENCES:
patent: 3215978 (1965-11-01), Brown et al.
patent: 3872424 (1975-03-01), Enabnit
Beyerlein David G.
Force John B.
Hynes Roy G.
Stewart John A.
General Motors Corporation
Hill Warren D.
Waring Alvin H.
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