Control device, parts therefor and methods of making the same

Details Control device, parts therefor and methods of making the same Control device, parts therefor and methods of making the same

1993-06-22

1994-03-15

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With longitudinally expansible solid element

337382, 337393, H01H 3748

Patent

active

052949079

ABSTRACT:
A control device, parts therefor and methods of making the same are provided, the control device having a temperature sensing unit comprising a rod and tube means utilizing a heat expandable and contractible polymeric member disposed between one end of the rod and an abutment of the tube to tend to cause an outer end of the rod to move toward an actuator of the control device upon the unit sensing decreasing temperature and to tend to cause that end of the rod to move away from the actuator upon the unit sensing increasing temperature, a biasing member being operatively interconnected to the unit to continuously place the tube under compression between an open end thereof and the abutment thereof and to continuously place the rod under tension between the opposite ends thereof to tend to reduce the temperature differential of the control device.

REFERENCES:
patent: 3691501 (1972-09-01), Katchka et al.

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