Apparatus for scanning cants to determine optimum edging cuts

Details Apparatus for scanning cants to determine optimum edging cuts Apparatus for scanning cants to determine optimum edging cuts

1975-04-16

1976-06-15

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

144312, 250223, 250571, G01N 2130

Patent

active

039639380

ABSTRACT:
An elongated workpiece having unfinished side surfaces inclined laterally downwardly and outwardly from a finished top surface is scanned to produce signals denoting location of the longitudinal edges of the top surface at numerous points along them. A swinging plane mirror defines an elongated scanning zone which extends across the workpiece and is translated all along it. The workpiece is alternately illuminated from opposite sides at a low angle of incidence to its top surface to shadow first one side surface, then the other. Scanning lengthwise along the scanning zone is synchronized with translation of that zone and with lighting alternation. A preferred apparatus is disclosed for establishing a reference line on the workpiece to which scanning data can be related.

REFERENCES:
patent: 3736968 (1973-06-01), Mason
patent: 3802774 (1974-04-01), Eschler et al.
patent: 3806252 (1974-04-01), Harris et al.
patent: 3856412 (1974-12-01), Zanoni
patent: 3886372 (1975-05-01), Sanglert
patent: 3890509 (1975-06-01), Maxey
patent: 3897156 (1975-07-01), Chasson

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