Universal digital converter for drafting machines

Details Universal digital converter for drafting machines Universal digital converter for drafting machines

1979-07-27

1981-01-06

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

33141R, 33 1M, G01B 312, B43L 1302

Patent

active

042428041

ABSTRACT:
A universal digital converter for drafting machines operable to sense and instantly display numerically on one of the machine scales incremental linear or angular movements thereof. A sensor mounted on the scale has a wheel in rolling contact with the drafting surface and generates signals proportional to the net distance moved in a selected direction and these signals are processed electronically to represent the distance travelled in any desired preselected scale ratio. The sensor is quickly positionable to measure movements of either the horizontal or vertical scales, as well as angular movements of the protractor ring of a standard drafting machine.

REFERENCES:
patent: 2421581 (1947-06-01), Scott
patent: 4171575 (1979-10-01), Blessing et al.

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