Reciprocating drafting pen

Details Reciprocating drafting pen Reciprocating drafting pen

1983-05-27

1984-11-13

Little, Willis

Geometrical instruments

Scriber

Straight-line

33 32C, 33 35, 33 42, B43C 1302

Patent

active

044817134

ABSTRACT:
A reciprocating drafting pen device is provided for automatically lifting a technical pen and replacing it onto drafting paper while the pen is drawn transversely across the paper, for stippling, or for the drawing of various other interrupted lines. The apparatus includes a barrel, a piston mechanism disposed within the barrel and longitudinally movable therein, a technical pen held by the piston mechanism and movable therewith, including an ink reservoir and a pen nib extending out one end of the barrel. A guide foot is adjustably attached to one end of the barrel for maintaining a desired standoff between the barrel and the drafting paper to be inked. An electromechanical drive mechanism moves the piston mechanism longitudinally, and thereby also moves the drafting pen such that the nib is brought alternately into contact and out of contact with the drafting paper. Favorably, one or more adjustable piston stops can be provided for to facilitate removal of the technical pen from the piston mechanism. The drive mechanism can include a solenoid, a piezoelectric drive mechanism, or a motor-driven cam.

REFERENCES:
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patent: 4157552 (1979-06-01), Nakajima
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