Oscillatory circuit utilizing PTC resistor

Details Oscillatory circuit utilizing PTC resistor Oscillatory circuit utilizing PTC resistor

1979-12-31

1982-03-16

Gellner, Michael L.

Electrical transmission or interconnection systems

Switching systems

Repetitive make and break

361165, 307 96, H01H 6106

Patent

active

043203094

ABSTRACT:
A control circuit for producing a repetitive closed-circuit, open-circuit condition between an electrical power source, such as a battery, and an electrical load comprises a positive temperature coefficient resistor in series with a relay coil. The PTC resistor is caused to alternate between a low resistance state and a high resistance state which permits energization and de-energization of the relay coil.

REFERENCES:
patent: 2482820 (1949-09-01), Wolfson et al.

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