Thermostatically controlled electric aquarium heater having an a

Details Thermostatically controlled electric aquarium heater having an a Thermostatically controlled electric aquarium heater having an a

1993-08-27

1995-02-21

Walberg, Teresa J.

Electric resistance heating devices

Heating devices

Immersion heater details

219523, H05B 380

Patent

active

053923804

ABSTRACT:
An aquarium safety heater includes an adjusting screw rotatably held in a packing plug which is sealably secured in an upper portion of glass tube. A heating coil, a thermostat, a bimetal circuit breaker, and an electric controller are mounted within the glass tube. The adjusting screw is adjustable from the exterior of the glass tube for adjusting the electric contact pressure of the bimetal for ensuring reliable operation of the circuit breaker and the electric controller for safely switching off the power supply to the heating coil once the thermostat is out of order, thereby preventing the killing of fish raised in the aquarium.

REFERENCES:
patent: 1992635 (1935-02-01), Ritterhoff et al.
patent: 2839660 (1958-06-01), Davies
patent: 3107289 (1963-10-01), Willinger
patent: 3746836 (1973-07-01), Summerfield et al.
patent: 3895217 (1975-07-01), Hall et al.
patent: 4234785 (1980-11-01), Lefebvre
patent: 4327281 (1982-04-01), Jager et al.
patent: 5113057 (1992-05-01), Tsai

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