Electronic immersion aquarium heater with spring biased NTC sens

Details Electronic immersion aquarium heater with spring biased NTC sens Electronic immersion aquarium heater with spring biased NTC sens

1995-07-10

1996-10-22

Jeffery, John A.

Electric resistance heating devices

Heating devices

Immersion heater details

392501, 392502, 219523, H05B 380, A01K 6306

Patent

active

055685870

ABSTRACT:
An electronic immersion heater includes a tube closed at one end that contains in succession from its bottom to its open end: a heating element, an electronic circuit board with the corresponding support and with a temperature sensor, and a hermetic plug. The electronic heater is characterized in that the sensor is pushed into direct or indirect contact with the tube by means of a single helical spring, which furthermore simultaneously acts as a spacer and as an electrical contact, without conventional rheophores, between the temperature sensor and the electronic circuit board.

REFERENCES:
patent: 2953921 (1960-09-01), Muncheryan
patent: 3746836 (1973-07-01), Summerfield et al.
patent: 3751305 (1973-08-01), Huebscher
patent: 4124793 (1978-11-01), Colman
patent: 5201840 (1993-04-01), Sausner et al.

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