Aquarium thermometer

Details Aquarium thermometer Aquarium thermometer

1978-06-19

1979-10-02

Swisher, S. Clement

Measuring and testing

Muscular force

73374, 73343B, G01K 114

Patent

active

041693825

ABSTRACT:
An aquarium thermometer is provided which may be selectively, horizontally positioned at a plurality of depths along a wall of an aquarium tank for comparing the temperatures at different levels to ascertain and to monitor temperature gradients in the tank. The thermometer assembly of the invention includes a water tight house having spaced ferrous components or magnets adjacent the opposite ends of the thermometer scale. A separate positioning handle, having similarly spaced, registerable magnets at its opposite ends, is adapted to cooperate with the thermometer housing on the wall, to cause the thermometer inside the tank to move correspondingly with the handle. The positioning handle and the thermometer housing may mount pairs of oppositely polarized magnets.

REFERENCES:
patent: 2482228 (1949-09-01), Wappner
patent: 2507559 (1950-05-01), D'Andrea
patent: 3161058 (1964-12-01), Willinger
patent: 3208090 (1965-09-01), Roesel
patent: 3518884 (1970-07-01), Wood
patent: 3827020 (1974-07-01), Okamoto

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