Relay control system

Details Relay control system Relay control system

1989-03-09

1992-03-24

Scott, J. R.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

307636, H01H 4700

Patent

active

050993844

ABSTRACT:
A relay control circuit regulates the Set and Reset states of a pair of latch-type relays utilizing only a relatively weak carrier signal. Each relay is controlled by a circuit including a programmable unijunction transistor that is triggered by the discharge of a storage capacitor to enable its respective relay to enter the set state. The carrier signal itself regulates the charging and discharging of the circuit capacitors, thus regulating the Set and Reset states of the respective relays.

REFERENCES:
patent: 3521130 (1970-07-01), Davis et al.
patent: 4395743 (1983-07-01), Sunaga et al.
patent: 4449056 (1984-05-01), Shibazaki
patent: 4528456 (1985-07-01), Harris

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