Heater having over temperature shut off control

Details Heater having over temperature shut off control Heater having over temperature shut off control

2005-12-20

2005-12-20

Jiang, Chen Wen (Department: 3744)

Automatic temperature and humidity regulation

Closed fluid heaters

Safety cut-out

C236S02100R, C219S481000

Reexamination Certificate

active

06976636

ABSTRACT:
A heater is provided with an accurate shutoff device that shuts off (de-energized) the heater upon detecting an over temperature condition. The heater includes a body for holding material (water) to be heated and a first heating element coupled to the body for heating material within the body. The heater also includes a temperature sensitive element coupled to the body for sensing temperature, and a shutoff switch coupled to the temperature sensitive element for shutting off the first heating element when the temperature sensitive element senses a temperature limit. The heater further includes a second heating element for heating the temperature sensitive element upon activation of the switch such that the first heating element is actively forced to remain shut off.

REFERENCES:
patent: 6080973 (2000-06-01), Thweatt, Jr.
patent: 6555796 (2003-04-01), Cusack
“10H Series Linear Limit Thermostat” from Therm-O-Disc, Bulletin No. 10H-0195, 1995, 2 pages.

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