Apparatus for measuring variations in windings of coiled materia

Details Apparatus for measuring variations in windings of coiled materia Apparatus for measuring variations in windings of coiled materia

1991-09-06

1993-08-24

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

33DIG3, 356379, G01N 2188, G01B 1128

Patent

active

052393577

ABSTRACT:
Apparatus for measuring lap to lap variations between windings of a coiled sheet product comprising a light source, a light measuring cell, and a light directing chamber located between the light source and the light measuring cell. The light directing chamber includes a cavity adapted to receive a shutter, and a light directing duct having a slot communicating with the cavity of the light directing chamber. The slot is adapted to provide an opening for inserting the shutter into the interior portion of the light directing duct.

REFERENCES:
patent: 241241 (1881-05-01), Ruge
patent: 1041145 (1912-10-01), Moss
patent: 2721391 (1955-10-01), Von Duyke
patent: 3539923 (1970-11-01), Tsergas
patent: 3727123 (1973-04-01), Smith
patent: 3769576 (1973-10-01), Norkaitis
patent: 3840301 (1974-10-01), Pryor et al.
patent: 4832495 (1989-05-01), Briggs et al.

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