Drafting apparatus

Details Drafting apparatus Drafting apparatus

1983-01-03

1984-11-13

Stearns, Richard R.

Geometrical instruments

Straightedge type

Base attached

33125C, B43L 1302

Patent

active

044817193

ABSTRACT:
A drafting table and measurement system which utilizes a read head for measuring the displacement of a straight edge overlying the drafting table. The drafting table mounts two perpendicularly disposed straight edges, one of which moves to and fro along the X-axis of the drafting table and the other which moves in a to-and-fro movement along the Y-axis of the table. Each straight edge is mounted on a carrier block via an adjustable member which can be operated to draw a portion of the straight edge toward the carrier block to clamp the straight edge to the table and inhibit the to-and-fro movement. A read head is mounted on each carrier block in justaposition with a scale that slidably receives the carrier block. The read head cooperates with the scale to provide a signal representative of the displacement of the straight edge.

REFERENCES:
patent: 2190947 (1940-02-01), Kinzler
patent: 3311982 (1967-04-01), Dalrymple
patent: 3525156 (1970-08-01), Witt
patent: 3537183 (1970-11-01), Anderson
patent: 4237617 (1980-12-01), Goussios

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