"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
|8286685||Limit mechanism of upper stop level and lower stop level for rolling door|
A limit mechanism for door machine for controlling the door curtain in such a manner that it stops accurately at an upper stop level and a lower stop level, the door machine including an output pulley driving a reel of the door curtain. The limit mechanism comprises...
|7195052||Cord-driven rotator for driving roller of window blind|
A rotator, which is driven by an endless cord member to rotate, is used in a window blind for driving a roller of the window blind. The rotator includes a base having a shaft, a first clamping plate and a second clamping plate rotatably serially mounted on the shaft...
|6955207||Friction device for roll-up curtains and the like|
A friction device (10), applied to roll-up curtains and the like, includes a tubular roller (1), on which the curtain (2) rolls up, and which is rotatably carried on a horizontal axis. The friction device (10) includes a threaded shaft (
A winding mechanism for an architectural covering such as a blind or shade in which a fixed shaft 10,110 is surrounded by an inner sleeve 16,116 and an outer sleeve 22,122. A one way clutch 20,32 is provided between the inner sleeve and the fixed shaft, a...
|6076591||Locking device for curtains, awnings and the like|
An assembly for locking a curtain in a selected position has a hollow roller unto which a curtain is rolled and unrolled, the roller containing an elastic winding device, and a locking device for locking the roller in the selected position. The locking de...
|6032716||Bottom stop mechanism for a window covering|
An inventive bottom stop mechanism uses one of the lift cords to operate. While the cord is unwinding from the shaft, the cord leaves the shaft along a line tangent to the shaft. As the last turn of cord is unwound from the shaft, and the point of attachm...
|5669432||Automatic-locking mechanical drive construction|
An automatic-locking mechanical drive construction for raising and lowering a window covering, including a fixed cylindrical shaft, a rotary drive member mounted to rotate about an axis with respect to the shaft, and a rotary driven member turnable with r...
|5482105||Clutch control for roller shades|
A spring clutch mechanism for the operation of roller shades and other rollable items. This clutch mechanism is designed to release for raising the shade so as to minimize effort. Whereas prior art clutch mechanisms for roller shades are intended not to s...
|5437324||Shade with variable load braking and lift assist|
The present invention provides a roller shade with a variable load brake and, in a modification thereof with a lift assist. The load brake includes a compressible spring surrounding a threaded rod, the spring acting against a traveling nut mounted on the ...
|4846248||Strap winder, in particular for skylight roller blinds|
The strap winder has a base plate (1) with a recessed grip (2) which is arranged laterally alongside the usual spring-tensioned strap drum (11) and through which the pulling strap (3) passes transversely, the pulling strap running from the device to be op...
There is disclosed a bi-directional clutch, particularly useful in window shade applications. The bi-directional clutch includes a first or core member and an unwrap spring, that is, a spring having an inside diameter somewhat smaller than the diameter of...
|4347885||Roller blind structure|
A roller blind structure has an elongated tubular member which is mounted for rotation and displacement in elongated openings in two spaced-apart brackets. Coaxially secured to the tubular member is a pulley. The roller blind screen is secured to the tubu...