Strain indicator

Details Strain indicator Strain indicator

1976-02-05

1977-01-11

Queisser, Richard C.

Signals and indicators

Alarms

Fluid flow

73 88F, 85 62, G01B 530

Patent

active

040021394

ABSTRACT:
A strain indicator of the type wherein a change in length of a strain member produces a change in color of a visual indicator. An indicator area and a light-absorbing indicator fluid are encapsulated in a member that also includes a window. The capsule is fastened to the strain member with an adhesive. A change in length of the strain member causes the indicator area to become separated from the window with the result that light-absorbing indicator fluid is caused to flow between the indicator area and the window.

REFERENCES:
patent: 3602186 (1971-08-01), Popenoe
patent: 3749108 (1974-03-01), Mosow
patent: 3850133 (1974-11-01), Johnson
patent: 3964299 (1976-06-01), Johnson

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