Key-operated actuator

Details Key-operated actuator Key-operated actuator

1979-01-25

1981-02-03

Tollberg, Stanley H.

Check-actuated control mechanisms

Including noncontacting, relatively movable parts connected...

222153, G07F 702

Patent

active

042483352

ABSTRACT:
A key-operated actuator includes a frame, an elongated bolt having a driving connection to the device to be actuated, a tumbler mechanism which enables bolt rotation only when a key having proper configuration is inserted. A frangible portion on the key axially displaces a non-rotatable sleeve which carries an anvil that breaks off the endmost frangible portion of the key. The driving connection between the bolt and the device to be actuated is at all times maintained, and the bolt is restricted to angular movement of a predetermined magnitude, there also being anti-backup means to ensure full bolt movement in both directions. A control disc is secured to the bolt and provides a portion of the anti-backup means, provides a portion of angular movement limiting means, provides an abutment that prevents bolt rotation when the last frangible portion has been broken off, and provides control for a further actuator that operates a further device.

REFERENCES:
patent: 3685625 (1972-08-01), Loewy

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