Time delay relay movement

Details Time delay relay movement Time delay relay movement

1978-04-12

1979-12-18

Braun, Fred L.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Retarded or delayed type

74 35, 200 34, 335 61, 335 64, H01H 700, H01H 4302, H01H 703

Patent

active

041796764

ABSTRACT:
An improved movement for a time delay relay cooperates with an electromagnet and a timer to provide either "On Delay" or "Off Delay" operation of the relay contacts. The movement has an elongated operating plunger that is movable in forward and backward strokes, a latch, and a contact actuator coupling the latch to the relay contacts. A pair of springs are disposed in a spring cage formed in the actuator and at least one spring-compressing flange is carried by the plunger and disposed between the springs. In the on delay mode of operation, one spring is loaded against the actuator upon a forward stroke of the plunger. In the off delay mode of operation, the other spring is loaded against the actuator upon a backward stroke of the plunger. The latch is restrained upon the movement of the plunger to load one of the springs, and is subsequently released from its restraint after a time delay to operate the relay contacts with spring action.

REFERENCES:
patent: 2840663 (1958-06-01), Horn
patent: 3249716 (1966-05-01), Haydu et al.
patent: 4024482 (1977-05-01), Lisnay et al.

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