Abstract: A releasable drive assembly is described, suitable for use with a rolling door. The illustrated assembly comprises a chassis, a final drive unit rotatably mounted to the chassis for operating the door, a motor fixed with respect to the chassis, drive means interconnecting the motor with the final drive unit, the drive means including a clutch for releasing and re-engaging the motor and the final drive unit, the clutch including a slidable clutch unit keyed for rotation with one part of the drive means and having axially projecting formations respectively engageable and disengageable with mating formations on the other part of the drive means upon sliding movement of the clutch unit, latchable disengagement means for selective engagement with the slidable clutch unit for sliding the clutch unit into and out of engagement with the mating formations, the disengagement means being latchable to hold the clutch unit in its disengaged position.

Abstract: A door controller for roller type doors is disclosed incorporating a microprocessor control system. The microprocessor measures and stores the door speed over segments of the door travel to generate a door speed travel characteristic. This characteristic enables the door controller to accurately assess obstruction conditions by comparing a real time characteristic with a stored characteristic. The microprocessor also stores electronically the upper and lower limits of door travel. The microprocessor monitors electric motor duty cycle to avoid overheating of the motor and possible burnout while also controlling locking of the drive mechanism when the motor is inoperative. The microprocessor is also used to set the radio control signal code used to activate the door drive mechanism, the setting procedure allows for immediate verification of the set code.

Abstract: A rolling door drive assembly including a chassis, a final drive unit rotatably mounted to the chassis for operating the door, a motor fixed with respect to the chassis, a drive device interconnecting the motor and the final drive unit, a housing defining a mounting channel on the assembly remote from the final drive unit, the mounting channel extending transversely to the axis of rotation of the final drive unit and adapted to receive part of a mounting bracket, and a mounting member extending into the mounting channel in a direction parallel to the axis for engagement with the mounting bracket.

Abstract: A bracket for use in mounting a roller door assembly to a wall comprises a plate having a bearing for support of a drum or end drum, the bearing being closer to one edge of the plate than another, and edge flanges whereby the bearing may be mounted at either of two distances from the wall. Preferably the edge flanges have interengageable formations facilitating stacking of door roller assemblies with the flanges of the brackets edge to edge.

Abstract: A roller shutter or door drum driving mechanism of the kind comprising a pivotally mounted electric motor, a gear train fixedly associated with said motor terminating in a pinion, a ring gear on the drum and manually operable, is furnished with releasable latch means which secure said motor and train in an operative position wherein the pinion meshes with the ring gear but, when released, permit the motor to move to an in-operative position wherein the pinion is clear of the ring gear.

Abstract: The curtain sheet of a roll-up type garage door is furnished with resilient anti-rattle strips. A safety switch operated by a striker bar at the edge of the sheet is connected to the power operating mechanism for the door by conductors held in place by clips having detent barbs interposed between the sheet and the strips.

Abstract: An anti-rattle element for a curtain of a closure, the curtain having a corrugated surface and, adjacent to its edges, either a strap riveted to crests of each corrugation or bridges extending across the troughs of the corrugations. The strap or bridges form detent surfaces engageable by a resilient latching tongue protruding rearwardly from a body of the anti-rattle element. The tongue has a tip that engages either the bridge or the strap to hold the anti-rattle element to the curtain. The body of the element also has first and second abutment side faces and a rear face having a recess therein which embraces a portion of an edge margin of the curtain. The anti-rattle element is connected to the curtain in such manner that its abutment faces are disposed respectively on opposite sides of the curtain and face outwardly therefrom.