Scanning apparatus for measuring the dimension of an object

Details Scanning apparatus for measuring the dimension of an object Scanning apparatus for measuring the dimension of an object

1975-07-09

1977-01-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, 250233, G01N 2130

Patent

active

040029190

ABSTRACT:
Apparatus for measuring the length of rolled steel shapes and the like comprises means for directing light onto the steel shape to produce a shadow up to an end of its length. A light receiver is provided for measuring this length. It comprises a cylindrical stationary element and a cylindrical rotatable element, one inside the other and both having apertures for forming a resulting aperture which has at least a movable portion. The apparatus also comprises a photo-electric transducer provided for example by a light-guiding rod inside the elements of the light receiver, for exposure of the rod to the shadow, through the resulting aperture. Photosensitive elements are provided at the ends of the rod.

REFERENCES:
patent: 1945968 (1934-02-01), De Amicis
patent: 3358150 (1967-12-01), Summer
patent: 3619626 (1969-03-01), Rudolf
patent: 3727067 (1973-04-01), Shepherd
patent: 3806730 (1974-04-01), Tirkkonen et al.

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