Draughting apparatus

Details Draughting apparatus Draughting apparatus

1989-02-23

1990-01-30

Haroian, Harry N.

Geometrical instruments

Miscellaneous

Light direction

33 1AA, 33430, 33614, 33617, G01B 500

Patent

active

048964271

ABSTRACT:
A draughting apparatus 10 comprising a plurality of substantially planar symbols elements 30 having raised outlines 50 for depicting predetermined symbols 32, a support panel means 12, 16, for supporting the symbols elements 30 in a generally planar layout, said symbols elements 30 being provided with symbol element locating means 34, 16, and symbol transfer means comprising a self-duplicating set of sheets 36 of draughting material having at least two sheets 36, and a pressure transfer means 24, said at least two sheets 36, being disposable between said raised outlines 50 of said symbols elements 30 and said pressure transfer means 24 so that pressure applied by said pressure transfer means 24 causes the outline of said symbols 32 to be transferred to at least one of said two sheets 36 to create an image of said symbols outlines thereon.

REFERENCES:
patent: 1964236 (1934-06-01), Welch
patent: 2034584 (1936-03-01), Lamb
patent: 2100114 (1937-11-01), Walsh
patent: 2958948 (1960-11-01), Dunkelberger
patent: 2994265 (1961-08-01), Hurlbut et al.
patent: 3223454 (1967-06-01), McFarland
patent: 3280738 (1966-10-01), Goodrich
patent: 3862598 (1975-01-01), Hawthorne
patent: 3890899 (1975-06-01), Brugge et al.

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