Tracing table

Details Tracing table Tracing table

1978-07-19

1980-01-29

Shepperd, John W.

Recorders

Multifactor-driven recorder element

346 49, 33 18R, G01D 928

Patent

active

041864042

ABSTRACT:
This tracing table of the type having two tracing arms, namely an upper arm and a lower arm, has the upper arm mounted in a plane located above that of the lower arm, in relation to the tracing plane, and the upper arm, in addition to the pen lifting mechanism comprises a pen retraction mechanism adapted to retract the tracing pen of the upper arm up to a level higher that of the lower arm, so that the two arms can cross each other. Each arm may comprise two ink pens, and each pen of the upper arm is provided with a corresponding retraction mechanism.

REFERENCES:
patent: 1996386 (1935-04-01), Owen
patent: 2224182 (1940-12-01), Crooke
patent: 2596305 (1952-05-01), Stevens
patent: 2714047 (1955-07-01), Dehmel
patent: 3196446 (1965-07-01), Ingerson et al.

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