Harry A Shuster

US Patent:

42187176, Aug 19, 1980

Filed:

Aug 21, 1978

Appl. No.:

5/935689

Inventors:

Harry Shuster - Beverly Hills CA

International Classification:

H02H 332
H02H 324
H02H 718

US Classification:

361 79

Abstract:

An electric control system is provided for a motor vehicle which automatically disconnects electric loads from the battery of the vehicle when the vehicle is not in use, and in the event that the driver leaves the vehicle without turning off the headlights, radio, or other accessories. The control system is connected to the battery of the vehicle, as well as to the generator and to the ignition switch. The system senses excess current from the battery under conditions when the generator is not functioning and when the ignition is turned off. However, a particular current threshold is established, so the system will not respond to normal current drain, such as from electric clocks, and the like. Also, a predetermined time delay is built into the system, so that the headlights, and other accessories will not be turned off the moment the driver stops his vehicle and turns off the ignition. However, should the excess currents from the battery persist beyond a predetermined time interval, the control system operates to disconnect the battery, or at least to reduce its current drain below a particular level.