Drawing apparatus

Details Drawing apparatus Drawing apparatus

1979-04-12

1980-12-30

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

B43L 1302

Patent

active

042415128

ABSTRACT:
A drawing apparatus provided with calculative function of a calculation portion. A universal parallel ruler in which operating keys and a calculation result display portion for operating the calculative function are disposed on the surface of a member, the base of which is connected with an operating grip of a head portion to project sideways of the member, the head portion being disposed to be moved and set to any position on a drawing board by guide rail members or jointed arm members and supporting a vertical scale and a horizontal scale to be set to any angle.

REFERENCES:
patent: 3822474 (1974-09-01), Yada et al.

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