.~ Indicating coating or sheet providing direct visual indication (e.g., cracking, color change)
DEFINITION
Classification: 73/762
Indicating coating or sheet providing direct visual indication (e.g., cracking, color change):
(under subclass 760) Subject matter wherein an indicating element or coating on the specimen undergoes a directly visually perceptible change in response to specimen stress or strain.
(1) Note. Such testing or measurement using optical elements (e.g., lenses) or photo-responsive devices are not classifiable herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
799, for testing of a crack in the specimen, rather than in an indicating element.
800, for testing using optical or photoresponsive elements with specimen loading.
SEE OR SEARCH CLASS
116, Signals and Indicators, 212, for indicators responsive to a given level of stress.
356, Optics: Measuring and Testing,
32+, for stress testing using optical or photoresponsive elements absent specimen loading.
