Universal parallel ruler with converted display of displacement

Details Universal parallel ruler with converted display of displacement Universal parallel ruler with converted display of displacement

1979-04-09

1980-09-09

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

B43L 1300

Patent

active

042210569

ABSTRACT:
A universal parallel ruler is disclosed. The ruler includes two digital read-out displays for displaying the displacement of the ruler in the x and y directions. In displaying the position of the ruler along the directions, the ruler compensates for the displacement of the movable rail relative to the stationary rail. It further compensates for the displacement of the head relative to the movable rail and for the x and y scales relative to the head. A reset is provided by which the position of the x and y reference axes may be changed. In addition, the ruler may be set to operate in a reduced or multiplied scale, and the digital display will, in either case, display the actual reduced/increased dimensional information.

REFERENCES:
patent: 4151649 (1979-05-01), Tasuzawa

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