Mechanical counterbalance

Details Mechanical counterbalance Mechanical counterbalance

1979-09-07

1981-07-07

Foss, J. Franklin

Supports

Resilient support

Constant thrust

2481231, 2482921, F16M 1300

Patent

active

042770440

ABSTRACT:
An instrument supporting arm is consistently uniformly counterbalanced over its entire excursion of adjustment with springs and spring holder guided by cams which alter arm length-to-moment ratio and force angles to compensate for spring extension forces.

REFERENCES:
patent: 2179357 (1939-11-01), Stava
patent: 2648146 (1953-08-01), Foster
patent: 2784962 (1957-03-01), Sherburne
patent: 3003737 (1961-10-01), Mehr
patent: 3402911 (1968-09-01), O'Neill
patent: 3498577 (1970-03-01), Mehr
patent: 3741511 (1973-06-01), Streeter
patent: 3860208 (1975-01-01), Salter
patent: 3880393 (1975-04-01), Watson

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