Lockable gate mechanism with automatic reindexing feature

Details Lockable gate mechanism with automatic reindexing feature Lockable gate mechanism with automatic reindexing feature

1978-04-11

1979-05-22

Kannan, Philip C.

Movable or removable closures

With specified means to effect emergency release to closure

49 49, E06B 1108

Patent

active

041551990

ABSTRACT:
A gate for controllably inhibiting passage through a controlled zone which includes a rotating arm, the rotation of which may be prevented by a solenoid-coupled pawl which engages a gear-like multiposition detent member coupled to a shaft on which the arm is mounted. In the event excessive force is applied to the arm when thus locked to enable emergency egress, a clutch allows rotation of the shaft, and of the arm, with respect to the detent member. The arm may be automatically repositioned to enable a new position about the periphery of the detent member to become engageable by the pawl.

REFERENCES:
patent: 2657486 (1953-11-01), Sweetser
patent: 3795075 (1974-03-01), Orzechowski
patent: 3978613 (1976-09-01), Hayward et al.

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