Two direction brake for a drafting table

Details Two direction brake for a drafting table Two direction brake for a drafting table

1979-06-04

1981-07-14

Husar, C. J.

Horizontally supported planar surfaces

Tiltable surfaces

Pivotally adjustable about horizontal axis

74531, 188 69, 188 77W, 188 826, 192 8C, 248166, 312231, A47B 2718

Patent

active

042780322

ABSTRACT:
Drafting board apparatus features a dual-spring brake to enable the angle of tilt of the drafting board to be selectively altered. Use of oppositely-coiled springs secures the board against movement, while a control linkage enables near-simultaneous release of said springs to enable adjustment of the board.

REFERENCES:
patent: 3028933 (1962-04-01), Mueller
patent: 3064766 (1962-11-01), Hanizeski
patent: 3135369 (1964-06-01), Nisenson et al.
patent: 3153370 (1964-10-01), Heimall
patent: 3206268 (1965-09-01), Grow et al.
patent: 3249180 (1966-05-01), Torossian
patent: 3528533 (1970-09-01), Sacchini
patent: 3633964 (1972-01-01), Bertin
patent: 3874480 (1975-04-01), Porter et al.

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