Geometrical instruments – Straightedge type – Base attached
Patent
1980-01-14
1982-02-09
Phillips, Charles E.
Geometrical instruments
Straightedge type
Base attached
108 9, B43L 700
Patent
active
043144071
ABSTRACT:
A drafting board tray for use in a drafting board having a cable guide track mounting for use with a straight edge assembly slideably adjustable on the cable guide track. The tray is disclosed to be pivotally attached and pivotally adjustably positionable at each end to two base mounts which are slideably adjustable on the cable guide track.
REFERENCES:
patent: 353477 (1886-11-01), Bloemaker
patent: 2846808 (1958-12-01), Ivester
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