Communications: electrical – Selective – Having indication or alarm
Patent
1976-02-20
1978-01-03
Caldwell, Sr., John W.
Communications: electrical
Selective
Having indication or alarm
188 3R, 280432, 303 20, 340249, 340275, 340282, B60Q 144, B60T 720
Patent
active
040669963
ABSTRACT:
A control system of the type which provides "breakaway" safety action to energize the electrically actuatable coils of brakes in a trailer pulled by a towing vehicle, the coils being energized under a breakaway condition from an auxiliary battery carried in the trailer. The system includes a voltage threshold indicator which is connected across the auxiliary battery and the coils and which enables the driver to test the auxiliary battery and clearly determine if the battery has sufficient storage capacity to keep the coils adequately energized while load current is being drawn from the battery and supplied to the actual coils themselves -- such system being characterized by the provision of a current threshold sensor which prevents the indicator from providing a "safe" signal if the excitation circuit to the coils has been interrupted or if one or more of the coils has become disconnected from the circuit.
REFERENCES:
patent: 2000999 (1935-05-01), Suchland
patent: 2305603 (1942-12-01), Cadman
patent: 3062326 (1962-11-01), Jones et al.
patent: 3689717 (1972-09-01), Westenhaver
patent: 3907071 (1975-09-01), Wells
Caldwell Sr. John W.
Nowicki Joseph E.
Warner Electric Brake & Clutch Company
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