Temperature indicator

Details Temperature indicator Temperature indicator

1978-04-21

1980-02-12

Woodiel, Donald O.

Signals and indicators

Indicators

Temperature responsive or compensating means

73358, G01K 1106

Patent

active

041877993

ABSTRACT:
A temperature indicator adapted to be attached to an object to be monitored consists of a housing containing a temperature responsive material and an embedded indicating object. Upon reaching the appropriate temperature, the temperature responsive material flows, allowing both the indicating object and a portion of the temperature responsive material to descend into the lower portion of the housing. Upon cooling the temperature responsive material resolidifies in the lower portion of the housing, thus providing a permanent record that the desired temperature has been reached.

REFERENCES:
patent: 1191572 (1916-07-01), Davis
patent: 1779066 (1930-10-01), Halsey
patent: 3192771 (1965-07-01), Stearns
patent: 3518961 (1970-07-01), Kovac
patent: 3618558 (1971-11-01), Tepfer
patent: 4114443 (1978-09-01), Clark

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