Method and apparatus for detecting surface discontinuities

Details Method and apparatus for detecting surface discontinuities Method and apparatus for detecting surface discontinuities

1988-04-01

1989-08-01

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

26 70, 226 24, G08B 2100

Patent

active

048536792

ABSTRACT:
Grooves can be detected on both sides of non-magnetic materials, preferably in terry fabric, carpets, blankets, or the like. A sensor is provided, which can be either inductive or capacitive, and is positioned on one side of the material opposite a rotatable and movable follower or finger on the other side. The finger is preferably made of ferromagnetic material and is resiliently biased towards and in contact with one surface of a material such as terry fabric. The sensor continuously monitors the distance between the finger and a reference point and generates a signal when a change in such distance occurs.

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patent: 4375175 (1983-03-01), Elsas et al.
patent: 4493234 (1985-01-01), Ziegler et al.

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