Ice thickness indicator

Signals and indicators – Indicators – Temperature responsive or compensating means

Patent

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Details

73358, G01D 1100, G01K 1106

Patent

active

041755120

ABSTRACT:
An ice thickness indicator is disposed at the surface of a body of water, as by floats, and provides a means to indicate whether the water has frozen to a predetermined thickness. The device includes an enclosed chamber which may be filled with water. The chamber is expansible by means of a movable member which partly defines the chamber. The movable member is located below the surface of the water and is connected to an upwardly extending indicator which displays different indications, depending on the relative position of the movable member. As the body of water in which the device is immersed freezes, the water within the expansible chamber also freezes and expands to cause movement of the movable member and operate the indicator means.

REFERENCES:
patent: 598985 (1898-02-01), Fleming
patent: 1320610 (1919-11-01), Elia
patent: 2788282 (1957-04-01), Hammond, Jr.
patent: 2819476 (1958-01-01), Dodge
patent: 4064828 (1977-12-01), Clark

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