Temperature indicator with limit detection apparatus

Details Temperature indicator with limit detection apparatus Temperature indicator with limit detection apparatus

1976-11-26

1978-04-04

Queisser, Richard C.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

733639, 116129B, G01K 300, G01K 562

Patent

active

040819990

ABSTRACT:
A thermometer having temperature limit indication includes a support plate having a bimetal coil secured to the plate by a suitable hub. A pointer arm is extended from the bimetal coil and positioned across a temperature scale on the plate in accordance with the sensed temperature. A portion of the plate is bent outwardly to define an inclined plane member at a selected temperature limit and in the path of the pointer arm. The coil mounted pointer has sufficient resiliency to permit movement over the inclined plane while insuring latching behind such bent outwardly portion if at the temperature limit. A plurality of spaced bent outwardly members may be provided to indicate various limits.
The inclined plane member may be a separate adjustable element to permit adjustment of the temperature limit position.

REFERENCES:
patent: 397548 (1889-02-01), Hoffman
patent: 1606936 (1926-11-01), Hapgood
patent: 2365962 (1944-12-01), Kahn
patent: 2605736 (1952-08-01), Cook et al.
patent: 3901217 (1975-08-01), Clark

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