Non-contact actuator

Details Non-contact actuator Non-contact actuator

1989-03-13

1990-11-06

Stormer, Russell D.

Handling: hand and hoist-line implements

Grapple

Fixed and moveable jaw

294 88, 271204, 271901, 1984701, B65G 4786

Patent

active

049680811

ABSTRACT:
A non-contact actuator assembly for a newspaper gripper includes a magnet disposed on a gripper release arm. The release arm passes beneath an electromagnet disposed adjacent the workpath of the gripper. The position of the gripper is sensed and a suitable signal provided to an associated voltage supply. A pulse width modulated voltage quickly and effectively induces a magnetic field in the electromagnet as the magnet in the release arm passes thereby and the magnetic field collapses quickly so as not to actuate the next gripper. The magnetic field urges the release arm to an actuated position so that opposed clamping jaws of the gripper open to release a gripped sheet product.

REFERENCES:
patent: 3140031 (1964-07-01), Fitch
patent: 3520459 (1970-07-01), McCrady
patent: 3873014 (1975-03-01), Matsuhisa
patent: 4138102 (1979-02-01), Palmer
patent: 4284301 (1981-08-01), Geiger et al.
patent: 4307801 (1981-12-01), Hansch
patent: 4381056 (1983-04-01), Eberle
patent: 4541771 (1985-09-01), Beni et al.
patent: 4614288 (1986-09-01), Torres
patent: 4662620 (1987-05-01), Hechler et al.
patent: 4681213 (1987-07-01), Winiasz
patent: 4746007 (1988-05-01), Houseman

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