Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1978-10-10
1982-01-26
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
119 5, 219205, 219328, 219345, 219526, 219535, 219536, 219548, H05B 102, A01K 6306, H05B 320
Patent
active
043130488
ABSTRACT:
An aquarium heater that is disposed on an outside surface of the aquarium tank for maintaining the water in the tank at a selectable temperature. The heater is preferably supported by a hanger or holder from a top edge of the tank and has a heat transfer plate disposed in intimate contact with a side or back wall of the tank. The heater includes, in addition to the heat transfer plate, a plastic or phenolic housing, a heating element, insulation and a settable thermostat contained in a temperature-sensing section of the housing. When the tank water is below a threshold temperature the thermostat closes coupling power to the heating element, which is preferably a rope-type resistance heater covered by a metal foil blanket, and when the temperature of the water reaches the threshold the thermostat temporarily opens to uncouple power to the heating element.
REFERENCES:
patent: 1534220 (1925-04-01), Kercher
patent: 1659487 (1928-02-01), Hudson
patent: 1781412 (1930-11-01), Slichter
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patent: 2475989 (1949-07-01), Ronning
patent: 2500399 (1950-03-01), Broome
patent: 2698374 (1954-12-01), Carpenter
patent: 2736791 (1956-02-01), Krah et al.
patent: 2801320 (1957-07-01), Prindle
patent: 3010007 (1961-11-01), Theodore et al.
patent: 3842241 (1974-10-01), Isaacson et al.
Bartis A.
Rolf C. Hagen (USA) Corp.
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