Submersible aquarium heater with adjustable electronic thermosta

Details Submersible aquarium heater with adjustable electronic thermosta Submersible aquarium heater with adjustable electronic thermosta

1989-06-06

1991-01-08

Bartis, Anthony

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219506, 219534, 392498, H05B 102, H05B 380, A01K 6306

Patent

active

049838130

ABSTRACT:
A submersible electric aquarium heater includes an open-ended glass tube enclosing an electric resistance heater carried by an axially disposed former. First and second bungs seal the ends of the tube. A printed circuit board carrying an adjustable electronic thermostat is positioned in the tube by first and second locators each including an annular spacer engageable with the tube and a centering post. The centering post of the first locator is insertable within the first bung, while that of the other is fixedly inserted into an end for the axially disposed former. The temperature setting of the thermostat is adjusted by a device mounted for rotation in the tube by the first bung and first locator and including a drum provided with indicia visible through the tube wall to indicate the set temperature.

REFERENCES:
patent: 3560707 (1971-02-01), Kolfertz
patent: 3896289 (1975-07-01), Di Renna
patent: 4124793 (1978-11-01), Colman
patent: 4327281 (1982-04-01), Jager et al.
patent: 4812626 (1989-03-01), Strada

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