Rolling door operating mechanism

Details Rolling door operating mechanism Rolling door operating mechanism

1987-01-12

1988-01-26

Britts, Ramon S.

Flexible or portable closure, partition, or panel

Roll type

With rotating means

160312, 74625, A47G 502

Patent

active

047211466

ABSTRACT:
A clutch or rolling door operating mechanism permits use of two sources of power for moving the door between open and closed positions. A drive gear rotates about an eccentrically mounted shaft which itself is turned through a clutch of the fixed drag type to swing the gear into engagement with the drive train for moving the door via manual power and to permit the gear to swing into disengagment with such drive train for moving the door by electric power operation. In one form a circuit interlock prevents motor operation during manual driving of the door; in a second form an audible "clacker" sounds to indicate manual operation of the operating mechanism.

REFERENCES:
patent: 2390117 (1945-12-01), Michelman
patent: 2622452 (1952-12-01), Michelman
patent: 2670065 (1954-02-01), Stevens
patent: 2819628 (1958-01-01), Wardlaw
patent: 2934139 (1960-04-01), Wardlaw et al.
patent: 2957521 (1960-10-01), Greegor
patent: 3134273 (1964-05-01), Wardlaw
patent: 3637004 (1972-01-01), Wardlaw et al.
patent: 3853167 (1974-12-01), Wardlaw

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