Spring loaded clamping device for drafting parallel lines

Details Spring loaded clamping device for drafting parallel lines Spring loaded clamping device for drafting parallel lines

1979-09-13

1981-05-12

Phillips, Charles E.

Geometrical instruments

Scriber

Parallel line

B43L 1300

Patent

active

042663431

ABSTRACT:
A device for drafting parallel lines by positioning a pair of pencils or pens between clamping portions of spring biased arms. The arms are joined at one end, the other ends snapping together to retain the pencils in the device.

REFERENCES:
patent: 3245146 (1966-04-01), Rogers

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