Automatic pencil apparatus for an automated drafting system

Details Automatic pencil apparatus for an automated drafting system Automatic pencil apparatus for an automated drafting system

1976-06-24

1978-05-23

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

Stylus feature

33 18R, G01D 1524

Patent

active

040913937

ABSTRACT:
An automatic pencil apparatus for an automated drafting system comprises a gripping means for holding and lifting a lead. The lead is pressed by means of a pressing means. The gripping means is actuated, by a driving means including an electromagnet, in the longitudinal direction. A change-over means supplys compressed air into the pressing means in response to up or down movement of the gripping means. The constant pressure is applied to the lead during drafting and plotting. When the lead is removed from a drafting sheet or is stopped, it is held and lifted up, so as to draw high quality lines and curves independently of the abrasion of the lead.

REFERENCES:
patent: 3939482 (1976-02-01), Cotter
patent: 3971036 (1976-07-01), Gerber
patent: 4015269 (1977-03-01), Edo

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