Timing mechanism with a PTC thermistor

Details Timing mechanism with a PTC thermistor Timing mechanism with a PTC thermistor

1990-11-29

1992-08-11

Scott, J. R.

Electricity: circuit makers and breakers

Retarded

Clock train

200 38B, 200 38C, H01H 4310, H01H 102

Patent

active

051381206

ABSTRACT:
A timing mechanism has cams operating switches which control the functions of an appliance and another cam operating another switch supplying short pulses to a separate function such as a warning buzzer. A PTC thermistor is in series with the switch supplying the short pulses.

REFERENCES:
patent: 3819886 (1974-06-01), Homan et al.
patent: 3943375 (1976-03-01), Williamson
patent: 4375587 (1983-03-01), Perl

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