Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1977-10-05
1980-01-01
Rubinson, Gene Z.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307117, 307252B, 340598, H01H 3500
Patent
active
041818431
ABSTRACT:
A circuit for controlling the flow of pulsating direct current by causing the on or off state of a gated switch to depend on the resistance of a sensor. The sensor used is of the variable resistance type whose impedance varies in a continuous manner with the phenomenon for which it was designed to detect. A variable resistor is used to select a magnitude of resistance of the sensor at which the switch is to turn on. A capacitor effects the return of the switch to an on state with each sequential direct current pulse until the resistance of the sensor changes in magnitude sufficient to negate the effect of the capacitor. An additional variable resistor is used to select a magnitude of charge to be collected by the capacitor and thus to control the amount of change in resistance of the sensor which must be realized before the switch is allowed to return to a sustained off state once an on state has been initiated.
REFERENCES:
patent: 3784843 (1974-01-01), Gustus
patent: 4003038 (1977-01-01), Meijer
Ginsburg Morris
Rubinson Gene Z.
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