Level indicator for carbon dioxide snow in a cold box

Details Level indicator for carbon dioxide snow in a cold box Level indicator for carbon dioxide snow in a cold box

1987-03-05

1988-05-10

Tapolcai, William E.

Refrigeration

With indicator or tester

116227, F25B 4900

Patent

active

047426888

ABSTRACT:
A device for indicating the level of carbon dioxide snow in the cold box of a refrigerated vehicle comprises three basic elements: a shaft, a disk mounted on an end of the shaft and a bearing to hold the shaft. The bearing is positioned so that the shaft extends vertically through the bottom of the cold box. The disk on the shaft moves up or down within the box by pushing or pulling the bottom end of the shaft. The distance that the shaft is pulled down at time intervals after the box is filled with carbon dioxide snow while the disk was against the top of the box indicates how much the snow level has fallen because of carbon dioxide sublimitation.

REFERENCES:
patent: 1661995 (1928-03-01), Brown
patent: 1744064 (1930-01-01), Zagarino et al.
patent: 2057034 (1936-10-01), Kinney, Jr.
patent: 2098963 (1937-11-01), Hexter
patent: 2907844 (1959-10-01), Lindsey
patent: 3561226 (1971-02-01), Rubin
patent: 4286439 (1981-09-01), Pasternack
patent: 4426851 (1984-01-01), Neumann

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