Screen-operating device for use in a roller blind

Details Screen-operating device for use in a roller blind Screen-operating device for use in a roller blind

1981-12-04

1984-01-10

Caun, Peter M.

Flexible or portable closure, partition, or panel

Roll type

With brake or stop

160320, E06B 9208

Patent

active

044248512

ABSTRACT:
A screen-operating device for use in a roller blind having a braking mechanism consisting a brake-drum secured to a bracket, a coil spring fitted on the brake-drum, a disk loosely mounted on the coil spring and integrally coupled with a screen-roll on which a screen is wound, and a cord-pulley mounted on the disk. The coil spring has their both ends inserted in an opening in the disk and the cord-pulley has its inner tung inserted between the both ends in the opening. Torque from the cord-pulley side acts on either of the both ends to loosen the coil spring and then rotates the screen-roll to raise and lower the screen. But, any torque from the screen side acts on the end to fasten the coil spring on the brake-drum and is immediately braked.

REFERENCES:
patent: 1841384 (1932-01-01), Schmelz
patent: 3854517 (1974-12-01), Nakamura

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