Temperature indicator

Details Temperature indicator Temperature indicator

1975-09-02

1977-04-12

Myracle, Jerry W.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

1161145, G01K 1112

Patent

active

040167623

ABSTRACT:
A temperature indicator of the type wherein the heating of the indicator to a predetermined temperature produces a change in color of a visual indicator. An indicator area and a light-absorbing indicator fluid are sealed in a fluid holding member that also includes a window. The fluid holding member is fastened to the temperature indicator. At such time as the temperature indicator reaches a predetermined temperature, a portion of the sealing wall of the fluid holding member is caused to be interrupted with the result that fluid is caused to flow out of the fluid holding member thereby producing a visual indication through the window of the indicator that a high temperature limit has been reached.

REFERENCES:
patent: 2230047 (1941-01-01), Eastburg
patent: 2503593 (1950-04-01), Pearce et al.
patent: 3090236 (1963-05-01), Nicol
patent: 3442249 (1969-05-01), Jamison et al.
patent: 3518961 (1970-07-01), Kovac
patent: 3569695 (1971-03-01), McLean
patent: 3877306 (1975-04-01), Heinmets
patent: 3877411 (1975-04-01), MacDonald

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