Frozen foodstuffs thawing detector device

Details Frozen foodstuffs thawing detector device Frozen foodstuffs thawing detector device

1987-12-07

1990-01-16

Tapolcai, William E.

Refrigeration

With indicator or tester

374160, 426 88, F25B 4900

Patent

active

048934771

ABSTRACT:
A foodstuffs thawing detector device (1) comprised of a water-filled container (2) in which detection or marker means (5, 8 or 10) is maintained in a stable position by the freezing of the water in the said container (2), where the said detection means will reach a position other than the said stable position when the water in the container melts. A preferred embodiment consists in a container (2) having an interior cavity defined by frusto-pyramidal formations (3) oriented in opposed directions and joined at their smaller bases in line with a central transverse plane (4); preferably, the said formations shall have a square base, and even a truncated arrangement (6) or the like, and detection means comprised of a ball member (5 or 8) having a high specific weight, maintained on the said central transverse plane (4) by the freezing of the water. In an alternative embodiment, the container is a simple pan (9) for the water (10), and the detection means is comprised of an amount of a water-soluble coloring substance (11) which will be poured into the pan once the water contained therein has frozen.

REFERENCES:
patent: 1535536 (1925-04-01), MacDonald
patent: 1917048 (1933-07-01), Midgley, Jr.
patent: 2216127 (1940-10-01), McNaught
patent: 3140611 (1964-07-01), Kliewer
patent: 3194669 (1965-07-01), Koch
patent: 3518961 (1970-07-01), Kovac
patent: 4064828 (1977-12-01), Clark
patent: 4187799 (1980-02-01), Zwarun

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