Voltmetric system comprising an electromagnetic relay

Details Voltmetric system comprising an electromagnetic relay Voltmetric system comprising an electromagnetic relay

1975-07-24

1977-03-22

Moose, Harry

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361206, H01H 4732

Patent

active

040139310

ABSTRACT:
A system of electromagnetic relays supplied by a substantially d.c. input voltage, comprising a unijunction transistor, whereof, between the electrodes, the connection of the two bases and the connection of the emitter and one of the bases are connected in series to one of the terminals of the winding of the relay for supplying the said winding by energizing the transistor, the voltage at the terminals of the assembly of the bases of the unijunction transistor and the winding being stabilized, while the emitter of the unijunction transistor is connected to a point in a resistive network of the system in such a way as to at least ensure a supply to the said winding which ensures the making of the relay for a clearly defined value of the d.c. input voltage.

REFERENCES:
patent: 3182227 (1965-05-01), Brittain et al.
patent: 3277280 (1966-10-01), Staples et al.
patent: 3493816 (1970-02-01), Monigal et al.

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