Electromagnet for a mechanical latch relay

Details Electromagnet for a mechanical latch relay Electromagnet for a mechanical latch relay

H - Electricity

01

H

306/79.1

H01H 50/32 (2006.01)

Patent

CA 1131678

ELECTROMAGNET FOR A MECHANICAL LATCH RELAY Abstract of the Disclosure A mechanical latch attachment (20) for a control relay (21) includes a mechanical latch movement (77), a solenoid (49), and a pair of contact cartridges (33) that are disposed in a housing (25). The wear-resistant latch movement (77) has a latch (95) with teeth (103) on one end that are engaged by a pair of pivotable, hooked pawls (105). The latch (95) is coupled to an operating plunger (79) through a contact actuator (82). The operating plunger (79) can be coupled to a conven- tional control relay (21), which moves the plunger (79) upon the closing of its relay armature (30) to actuate the contacts (35, 36) in both the relay (21) and the attachment (20) and to move the latch (95) to a position where it is restricted by the pawls (105). Th restriction of the latch (95) holds the relay armature (30) closed and the contacts (35, 36) actuate even though the relay (21) is deenergized. The solenoid (49) has an armature (62) that can be moved mechanically or elec- trically to release the latch (95) from the pawls (105). Re- lays with a mechanical latch attachment provide quiet opera- tion and retain their operated state even in the event of a power failure.

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