Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1980-02-19
1982-01-12
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 57, 337343, H01H 7116
Patent
active
043108229
ABSTRACT:
A temperature control device for use with an aquarium heater, including a control housing, a first contact fastened to the control housing, a second contact responsive to the temperature responsive movement of a bimetallic strip maintained at the control housing and movable between a closed position wherein the second contact abuts the first contact and an open position wherein the second contact is separated from the first contact, a plate spring, the second contact fastened at the free end of the plate spring and with the plate spring mounted on the control housing and movable through an unstable intermediate position between a first stable position wherein the contacts lie abuting one another and a second stable position wherein the contacts are separated from one another, and the plate spring abuting a stop on the control housing and with the bimetallic strip abuting the plate spring and moving the plate spring in response to temperature changes between the first and second positions.
REFERENCES:
patent: 2658975 (1953-11-01), Zuckerman
patent: 2776352 (1957-01-01), Davis
patent: 3222481 (1965-12-01), Lorenz
Broome Harold
Ebo-Jager, Inc.
Roston Ellsworth R.
Schwartz Charles H.
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