Electronic monitoring system with selective signal inverter

Details Electronic monitoring system with selective signal inverter Electronic monitoring system with selective signal inverter

1977-06-20

1979-01-16

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

307252P, 323 22SC, 328 5, 361180, H01H 3600

Patent

active

041351240

ABSTRACT:
A contactless motion detector is energized from a source of direct current via a pair of supply leads and delivers an output signal by way of a further conductor to a control electrode of a binary electronic switch, such as a thyristor, in series with the source and a load to modify the flow of load current upon the approach of a metallic element, for example. An Exclusive-OR gate is inserted in the further conductor to act as a selective signal inverter, one input of this gate being permanently connected to one supply lead while being also selectively connectable to the other supply lead whereby the load current can be either increased or reduced upon the occurrence of the event to be detected.

REFERENCES:
patent: 3743865 (1973-07-01), Riechmann
patent: 3932774 (1976-01-01), Buck
Ernst et al., "Heater Control Circuit", IBMTDB, vol. 15, No. 5, Oct. 1972, p. 1587.

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