Projection table for an optical projection pattern grinding mach

Details Projection table for an optical projection pattern grinding mach Projection table for an optical projection pattern grinding mach

1983-04-20

1985-06-25

Martin, Jr., William D.

Geometrical instruments

Miscellaneous

Light direction

33185R, 5116572, 353 28, G03B 2300

Patent

active

045245215

ABSTRACT:
In a projection table of an optical projection form grinding machine, with a transparent carrier for a form pattern drawing, which bears insertion marks, and with a transparent cover, which can be moved between an open position, in which the carrier is accessible for insertion of the form pattern drawing, and a closed position, in which the cover lies flush on the form pattern drawing and fixes it in position on the carrier, in order on the one hand to eliminate disturbing reflections, and on the other hand to obtain good visibility of the insertion marks during insertion, it is proposed that the cover be made nonreflecting or reflection-reducing, but displaying transparent regions, not made nonreflecting or reflection-reducing, above the insertion marks of the form pattern drawing.

REFERENCES:
patent: 2460491 (1949-02-01), Cooke
patent: 2510998 (1950-06-01), O'Brien
patent: 2652664 (1953-09-01), Allan et al.
patent: 4105312 (1978-08-01), Wells et al.
patent: 4167082 (1979-09-01), Kolb

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