Automatic counterbalance control circuit

Details Automatic counterbalance control circuit Automatic counterbalance control circuit

1976-11-10

1978-01-24

Lanham, C.W.

Metal deforming

With use of control means energized in response to activator...

Sensing work or product

72436, 72445, 72450, B21J 920

Patent

active

040696979

ABSTRACT:
A control circuit for automatically counterbalancing the moving components of a mechanical power press. The counterbalance circuit is responsive to the current drawn by the press motor to regulate air pressure in a cylinder attached to the press ram. On the press downstroke, air pressure in the cylinder is decreased only if the press is over counterbalanced and on the press upstroke, air pressure in the cylinder is increased only if the press is under counterbalanced.

REFERENCES:
patent: 1562988 (1925-11-01), Nelson
patent: 2084066 (1937-06-01), Rode
patent: 2767601 (1956-10-01), Reed
patent: 2970327 (1961-02-01), Friedman
patent: 3557600 (1971-01-01), Saito
patent: 3561252 (1971-02-01), Norton
patent: 3834216 (1974-09-01), Schiller

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