Finger enabling iso-component temperature/pressure indicator

Details Finger enabling iso-component temperature/pressure indicator Finger enabling iso-component temperature/pressure indicator

G - Physics

01

L

116/67.5

G01L 7/00 (2006.01) G01K 3/00 (2006.01) G01K 11/06 (2006.01) G01L 19/12 (2006.01)

Patent

CA 1211002

-18- Abstract Indicating device suitable for visibly indicating conditions such as the application of force or pressure or the exposure to a critical temperature. The device includes a porous pad containing an indicating dyed chemical, a wick maintained in spaced relation to the pad and a snap action activating means. The activating means forces the wick into contact with the pad and dyed chemical migration provides visible indication of the application of force or pressure. The indicating dyed chemical may be frozen and the activating means engaged. Upon reaching a critical temperature the frozen chemical melts allowing dye migration into the wick and a visible indication of exposure to the critical temperature.

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