Device for heating and maintaining a constant temperature in a l

Details Device for heating and maintaining a constant temperature in a l Device for heating and maintaining a constant temperature in a l

1996-07-26

1998-05-12

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219523, 219506, 219543, 219510, 392498, 392501, H05B 102

Patent

active

057509603

ABSTRACT:
A device for heating the water in an aquarium comprises a casing, and housed in the casing, at least one heater element, a thermostat, an electrical circuit by way of which the heater element and thermostat are wired in series to an external power supply, and a control facility for regulating the heater element, which is connected to the thermostat and can be activated from externally of the device; the operation of the heater element is indicated by a lamp. The casing affords at least one internal cavity consisting in a tubular glass wall around which the heater element is wrapped, and having open ends so that the water can pass through.

REFERENCES:
patent: 2511902 (1950-06-01), Cabrera
patent: 4156128 (1979-05-01), Craven
patent: 4218607 (1980-08-01), Noland
patent: 4255648 (1981-03-01), Willinger et al.
patent: 4379220 (1983-04-01), Middleman et al.
patent: 4667084 (1987-05-01), Regge
patent: 4983813 (1991-01-01), Van Tulleken et al.

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