Temperature sensing device for permanently indicating when a pro

Details Temperature sensing device for permanently indicating when a pro Temperature sensing device for permanently indicating when a pro

1996-09-19

1999-09-21

Chilcot, Richard

Signals and indicators

Indicators

Temperature responsive or compensating means

374106, G01K 1106

Patent

active

059540109

ABSTRACT:
A temperature sensing device for permanently indicating when a product is exposed to ambient temperatures exceeding a maximum permitted temperature of the product for a time period long enough to permanently damage the product. In an exemplary embodiment, the temperature sensing device is typically located on the protective cover of a battery away from terminals and the battery casing. The temperature sensing device is made of a material to permanently expand and/or shrink upon reaching critical temperatures (e.g. too hot). The expansion is visually detectable by means of a visual indicator and/or reference point.

REFERENCES:
patent: 1345767 (1920-07-01), Hammond
patent: 1788794 (1931-01-01), Harris
patent: 2277533 (1942-03-01), Thompson
patent: 3268345 (1966-08-01), Kennedy, Jr.
patent: 3533291 (1970-10-01), Steele et al.
patent: 3724360 (1973-04-01), Kliewer et al.
patent: 5482000 (1996-01-01), Ward

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