Safety circuit for electrical loads

Details Safety circuit for electrical loads Safety circuit for electrical loads

1978-07-24

1980-07-15

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Special application

Vehicle

307 39, 315 93, 315136, 340642, H05B 3910, B60Q 104

Patent

active

042130751

ABSTRACT:
A safety circuit is provided for parallel connected electrical loads. The headlight circuit of an automobile or other vehicle is an important application for the circuit. In the circuit a reversely polled control rectifier is in a parallel conductor subcircuit to the bright lamp filament of the headlight. The gate of the control rectifier is connected to a conductor of the dim lamp filament of the headlight. The control rectifier presents an open circuit when both of the lamps are operable but is adapted to connect the bright lamp filament through a resistor and a diode when the dim lamp filament of the headlight fails.

REFERENCES:
patent: 2100695 (1937-11-01), Lackey
patent: 3535585 (1970-10-01), Barnum
patent: 3671955 (1972-06-01), Malekzadeh
patent: 3733515 (1973-05-01), Parkes

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