Abstract:
The invention relates to a device for controlling a winding speed of a winding roll for a screen or shade which adjusts resilience of a torsion spring to increase or decrease the winding speed of the winding roll, preventing mechanical friction with improved operational capability. In the device, a worm wheel is integrally formed in a shaft supporting part receiving an end of the winding shaft, and is rotatably in contact with a stopper plate enclosing a side of an outer shell. Also, an adjustment member having an end penetrating through a front portion of the outer shell is disposed horizontally adjacent to the worm wheel and perpendicular to the winding shaft. Further, the worm wheel is in mesh with a worm integrally formed in a middle portion of the adjustment member.
Abstract:
A spring tensioning mechanism incorporating a frame having a substantially-planar main panel and a bore passing therethrough, and an axle disposed orthogonally to the substantially-planar main panel and passing through the bore. A spring is disposed around the axle. An outboard plate, disposed about the axle, is secured to the frame. The outboard plate incorporates a clocking feature. An inboard plate, having a clocking feature mated to the clocking feature of the outboard plate, is connected to the end of the spring.
Abstract:
Ce mécanisme (1) comprend un organe (4) d'entraînement en rotation d'un arbre d'enroulement (2) pour un écran d'obturation d'une ouverture (O) et au moins un ressort de compensation (5) du poids de l'écran. Le ressort (5) est monté autour de l'organe d'entraînement (4) et appartient, avec celui-ci, à un sous-ensemble (10) apte à être au moins partiellement introduit (F1) de façon unitaire à l'intérieur de l'arbre (2), une première extrémité (51) du ressort (5) étant cinématiquement liée à cet organe (4), alors que sa seconde extrémité (52) est apte à être cinématiquement liée à l'arbre (2), lorsque le sous-ensemble (10) est en place dans l'arbre (2).
Abstract:
A tensioning assembly for a door system, which includes an upwardly acting door supported by a frame and connected to a counterbalance system having a counterbalance spring, the tensioning assembly including a rotatable tension plate coupled to the counterbalance spring and rotatable relative to the counterbalance spring, the tension plate being selectively moveable between a disengaged position where the tension plate is freely rotatable and an engaged position where the tension plate is rotationally fixed to the frame; and a spring adapted to urge the tension plate toward the engaged position, whereby when in the disengaged position the tension plate is rotatable to adjust tension in the counterbalance spring and the tension plate is returned to the engaged position to maintain the tension.
Abstract:
A rolling door including an axle supported by end brackets, a plurality of drum wheels mounted on the axle, a multi-section door adapted to be selectively rolled and unrolled about the drum wheels, a gear wheel mounted on the axle proximate to one of the end brackets, a spring retainer associated with the gear wheel, a torsion spring having a first end operatively attached to the multi-section door and a second end attached to the spring retainer, a pivotally mounted pawl selectively engaging the gear wheel to maintain a selected counterbalance force setting and disengaging the gear wheel to permit adjustment of the counterbalance force setting, and a locking assembly carried on the pawl selectively engageable with the support bracket to lock the pawl in an engaged position.
Abstract:
An operator for a window covering held on a roller or axle (2) has a stationary member (13) having a central cavity and a first bore sized and positioned so that the roller can pass through the bore into the central cavity. A release brake (15) is positioned so that the axle or roller can pass through and be held by the release brake (15). An inertial ring (30) within the central cavity of the stationary member, surrounds a coil spring (23) which encircles the axle (2). A release member (32) is provided adjacent the release brake (15) and the inertial ring (30). The release member (32) is sized and positioned so that when the release ring is in a first position the release member will not engage the inertial ring (30) or the release brake (15) and when the release member (32) is moved in a selected direction the release member (32) will engage and turn the release brake and the inertial ring. A spool (19) is positioned within the central cavity of the stationary member adjacent the inertial ring. A rewind spring (21) is connected between the spool (19) and the stationary member such that when a force acts on the spool (19) in the first direction from the initial position the rewind spring (21) will tighten and when the force is removed the spring (21) will loosen causing the spool (19) to return to the initial position.
Abstract:
A spool (1) for use with a swimming pool cover or with a shade cover. The spool (1) has a roller assembly (4), and a cover (not shown) may be wound onto the roller assembly (4) or unwound from the assembly (4). The roller assembly (4) has a pre-tensioned rubber strip (22) that when viewed in transverse cross-section is substantially rectangular in shape and two opposing sides of the rectangle are notched. This strip (22) is tensioned when the cover is unwound from the spool (1) and a locking mechanism retains the cover in a desired unwound position against the tension of the rubber strip (22).
Abstract:
The present invention is directed to a rolling protective shutter (10) having improved shutter tracks (72). The improved shutter tracks (72) according to the present invention include an improved stopping mechanism (92) that prevents the shutter (30) from completely rolling up onto the shutter support member (20), provides for adjustment of the position where the shutter (30) will stop as the shutter (30) is rolled up onto the shutter support member (20), and is hidden within the shutter tracks (72). The improved shutter tracks (72) according to the present invention further include an improved cover assembly for use in concealing angle brackets (104) and the associated attachment hardware (110, 112) when a shutter track (100) is angle mounted to a wall (102) or jamb. The cover assembly completely encloses the angle bracket (104) to give the shutter track (100) and, consequently, the rolling protective shutter (10) a finished appearance after installation.
Abstract:
Elastic means for rolling up a roller curtain include a plurality of springs (26, 27, 28) fastened rigidly to a common support (15) connected to a shaft (2) and with respective support and constraint elements (36, 37, 38) which are geometrically coupled to the roller (19). A device for connecting the springs to a stationary frame (35) of the curtain (20) reduces the number of springs torsional turns with respect to the number of turns of the roller (19) by interposition of a speed reducer between the shaft (2), to which the springs are fastened, the stationary frame (35) and the roller (19). The shaft (2) end is located closer to the most external support and constraint element (36) and its extremity has a disc (11) mounted thereto. The coupling device together with the springs (50), their supports (15, 36, 37, 38), the shaft (2) and an external support cylindrical body (6) form a compact assembly, which is introduced into one head of the roller (19). The other head of the roller (19) features a cap (12), rotatably fastened to a cylindrical section of a support (13) which is locked to the stationary frame (35) by a tang (14). The geometrical coupling between the shaft (2) and the spring supports (15, 36, 37, 38) allows for easy and quick relocation of the roll up device on each side of the window to which the roller curtain is to be mounted.
Abstract:
The invention concerns a tensioning device (7) for at least one torsion spring (2) fitted round a shaft (1) which is operatively linked to a door leaf with which it moves, executing a rotary motion as it moves. One end of the torsion spring (2) is fixed to a tensioning ring which can be rotated about the shaft (1) and, following tensioning of the spring by rotation of the tensioning ring (5), can be locked to the shaft (1) so that it can no longer rotate. The spring (2) can be tensioned manually, without the need for any great force and without danger for the fitter, by virtue of the fact that the tensioning ring (5) is fitted coaxially to the power-output element (9) of a high-ratio gear (8) whose power-input element (10) is operatively connected to the power-output element (9), and hence to the spring, by mounting the power-input element (10) in a housing (11) fitted to the shaft (1) or to the tensioning ring (5), the power-input element (10) being designed so that it can be connected to an ordinary hand-held rotary power tool.