Time delay relay with spring clips

Details Time delay relay with spring clips Time delay relay with spring clips

1980-05-05

1982-12-21

Harris, George

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337107, 337354, H01H 3752

Patent

active

043652255

ABSTRACT:
A time delay relay has a switch assembly, a spring terminal assembly, and an electrical resistance heater unit of an inexpensive construction held together in a reliable and economical manner by a pair of easily mounted metal spring clips. The clips have opposite ends each securely hooked over portions of the terminal assembly and resiliently engaged with respective, oppositely-facing surfaces of the switch and terminal assemblies so that the heater unit is firmly held in a predetermined position in the relay with opposite electrical poles of the unit resiliently engaged with respective terminals in the terminal assembly for directing electrical current through the heater, so that a thermally-responsive dished thermostatic disc is disposed in close heat-transfer relation to the heater unit at a location where it is free to move at a precisely predetermined temperature as it is heated by the heater unit, and so that a motion transfer pin is guided for free movement in response to the disc movement to provide snap-acting opening and closing of electrical contacts in the switch assembly.

REFERENCES:
patent: 3500277 (1970-03-01), Hardulli
patent: 3858139 (1974-12-01), Hunter
patent: 3858140 (1974-12-01), Hancock
patent: 4136323 (1979-01-01), D'Entremont et al.
patent: 4177443 (1979-12-01), Willeke
patent: 4224591 (1980-09-01), Senor

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