Measuring and testing – Muscular force
Patent
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
DiMarchi Silvio J.
Gilmore Arthur
Goldman Jerome N.
Goldman Marvin A.
Corr Denis E.
Penn-Plax Plastics, Inc.
Swisher S. Clement
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