Thermally-sensitive controls

Details Thermally-sensitive controls Thermally-sensitive controls

F - Mech Eng,Light,Heat,Weapons

24

H

306/188

F24H 9/20 (2006.01) H01H 37/00 (2006.01) H01H 37/76 (2006.01)

Patent

CA 1265831

ABSTRACT Thermally-sensitive controls A thermally sensitive control 1 for an electric heater 2 comprises back-up protection means in the form of a pre-loaded spring mechanism comprising an actuating spring 25 which is held in normal use of the control in a pretensioned condition by retaining means in the form of push rod 27. The push rod 27 is adapted to soften and deform in the event of serious overheating of the heater consequent upon failure of a primary protecter switch means of the control, whereby the spring 25 is released and moves an operating member 30 into engagement with a set switch contacts 15 to open the contacts and disable the heater.

519701

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