Mechanism for detecting an obstacle preventing the proper operat

Details Mechanism for detecting an obstacle preventing the proper operat Mechanism for detecting an obstacle preventing the proper operat

1996-09-26

1998-01-13

Johnson, Blair

Flexible or portable closure, partition, or panel

Automatic control

With retarding means

160 1, 160310, 160291, 242563, E05F 1520

Patent

active

057068755

ABSTRACT:
A mechanism for detecting an obstacle preventing the proper operation of a sectional shutter of a warehouse-type door which includes a detection member mounted in the vicinity of a horizontal shaft around which the sectional shutter is wound by the operation of a motor. The detection mechanism is connected to a switch for controlling the motor and thus the rotation of the horizontal shaft about which the sectional shutter is wound. The detection member consists of at least one member which extends adjacent to but spaced from the horizontal shaft and which is engageable by a slack portion of the sectional shutter caused by the engagement of an obstacle with the sectional shutter as it is being lowered.

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