H - Electricity – 05 – B
Patent
H - Electricity
05
B
309/38, 309/40
H05B 3/22 (2006.01) A01K 63/06 (2006.01)
Patent
CA 1141411
AQUARIUM HEATER Abstract of the Disclosure An aquarium heater that is disposed on an outside sur- face 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 thermo- stat contained in a temperature-sensing section of the housing. When the tank water is below a threshold temperature the thermo- stat 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.
329143
Hagen (rolf C.) (usa) Corp.
Swabey Ogilvy Renault
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