Liquid heaters and vaporizers – Safety devices – Fusible control
Patent
1982-10-29
1984-06-05
Favors, Howard G.
Liquid heaters and vaporizers
Safety devices
Fusible control
110188, 122504, 236 45, F22B 3746
Patent
active
044521847
ABSTRACT:
In order to protect a boiler against overheating a boiler draft control device comprises a safety thermostat in addition to the regular control thermostat. The control thermostat is provided with a supporting tube in order to limit its length reduction in the event of its failure. The safety thermostat is designed in such a manner that its working element only provides a displacement when the control range of the control thermostat is exceeded. Furthermore the safety thermostat has a very steep displacement/temperature characteristic and its maximum stroke is equal or greater than the stroke being given by an operable control thermostat over its total control range. A latch means is provided to prevent that an air inlet flap closed according to the response of the safety thermostat may be opened again with the cooling down of the boiler.
REFERENCES:
patent: 1884794 (1932-10-01), McKee
patent: 2031652 (1936-02-01), Hopping
patent: 2287262 (1942-06-01), Merry
patent: 2329476 (1943-09-01), Livingston
patent: 2774541 (1956-12-01), Eskin
patent: 3643582 (1972-02-01), Mochida
Blinn Clyde C.
Favors Howard G.
Honeywell-Braukmann GmbH
Warner Steven E.
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