Drafting machine

Details Drafting machine Drafting machine

1982-09-30

1984-03-27

Little, Willis

Geometrical instruments

Straightedge type

Base attached

33 1M, 33433, B43L 1300

Patent

active

044385692

ABSTRACT:
A drafting machine includes a pair of perpendicular straight edges slidably mounted with respect to reference scales integrally mounted within the drafting machine. A fine adjustment mechanism includes a worm and spur gear combination for moving the straight edges with respect to the scales. An override mechanism allows the straight edges to move freely with respect to the scales. The drafting machine preferably includes a second adjustable scales adjacent each reference scales for ease and accuracy in measuring.

REFERENCES:
patent: 1436673 (1922-11-01), Nunamaker
patent: 2243838 (1941-06-01), Cunningham
patent: 3431651 (1969-03-01), Graham
patent: 3950853 (1976-04-01), Andrew
patent: 4087916 (1978-05-01), Goguillot

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