Linkage device for drafting tables

Details Linkage device for drafting tables Linkage device for drafting tables

1979-01-08

1981-06-02

Frazier, Roy D.

Horizontally supported planar surfaces

Tiltable surfaces

Sectional

248284, A47F 512

Patent

active

042704600

ABSTRACT:
The present invention concerns improved drafting tables provided with a drawing board, a shelf and a linkage device which enables the shelf to be maintained in a substantially horizontal position while the drawing board is moved between substantially horizontal and substantially vertical positions. Drafting tables which have been provided with a linkage device and shelf in accordance with this invention provide increased efficiency, comfort and convenience for persons using the tables.

REFERENCES:
patent: 611446 (1898-09-01), Cotner
patent: 689707 (1901-12-01), Davis
patent: 976639 (1910-11-01), Cots
patent: 2223405 (1940-12-01), Cain
patent: 2501415 (1950-03-01), Shampaine

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