Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1993-12-15
1995-07-25
Paschall, Mark H.
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
392442, 374102, 374107, 340589, 219497, 219501, H05B 102
Patent
active
054370027
ABSTRACT:
A water heating system for a commercial coffee brewer includes a control circuit having a dry bowl cut out circuit. The system includes a control circuit, tank, and heater. The dry bowl cut out circuit receives a differentiated temperature signal and generates a control signal when the differentiated signal is above a predetermined threshold. The control signal represents that the tank is empty. The heater is turned OFF in response to the control signal. Also, the control circuit includes an operating temperature circuit and high limit temperature circuit for controlling the heater. A switch in the heater is electromagnetically coupled to the control circuit.
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patent: 5183998 (1993-02-01), Hoffman et al.
patent: 5229751 (1993-07-01), Chandler et al.
Paragon Electric Company, Inc.
Paschall Mark H.
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