Signals and indicators – Indicators – Temperature responsive or compensating means
Patent
1981-05-21
1982-11-02
Ciarlante, Anthony V.
Signals and indicators
Indicators
Temperature responsive or compensating means
374155, 374160, G01K 1108
Patent
active
043567908
ABSTRACT:
A pop-up type temperature indicator is adapted to be inserted in poultry or other meat to indicate that a preselected temperature has been reached. The indicator includes a housing having a bore, a movable temperature-indicating element in the bore, and a temperature-sensing member having an elongated needle projection from a lower portion of the housing and a head adjacent a lower portion of the temperature-indicating element. The temperature-sensing member is made of metal, and a thin film of a solidified fusible alloy normally secures the head of the temperature-sensing member to the temperature-indicating element to retain the element in a fixed position in the bore. A coil spring biased against the temperature-indicating element applies force to the element for triggering movement of the element in the bore upon melting of the fusible alloy at a preselected temperature sensed by the temperature-sensing member. This releases the element from its fixed position for moving the element out through an upper portion of the body to indicate that the preselected temperature has been reached.
REFERENCES:
patent: 945978 (1910-01-01), Nielson
patent: 1509110 (1924-09-01), Potter
patent: 2065635 (1936-12-01), Weinert
patent: 2297891 (1942-10-01), Huthsing
patent: 3140611 (1964-07-01), Kliewer
patent: 3456614 (1969-07-01), Hampton
patent: 3811402 (1974-05-01), Keeley
patent: 3834226 (1974-09-01), Pecorella
Ciarlante Anthony V.
Corr Denis E.
Huntington Tool, Inc.
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