Abstract: A hinge for a multi-panel door includes a first bracket, a second bracket pivotally coupled to the first bracket, and a carrier link carrying a roller adapted to engage in a door track. The first bracket is adapted to be operably attached to a first panel of the multi-panel door, the second bracket is adapted to be operably attached to second panel of the multi-panel door, and the carrier link is pivotally attached to one of the first bracket or the second bracket. The carrier link is selectively positionable in a plurality of pre-defined positions, such that at each of the pre-defined positions, the roller is disposed at a different position relative to the first bracket and the second bracket so that the roller can be spaced apart a variety of different distances from the door.

Abstract: A hinge for a multi-panel door includes a first bracket, a second bracket pivotally coupled to the first bracket, and a carrier link carrying a roller adapted to engage in a door track. The first bracket is adapted to be operably attached to a first panel of the multi-panel door, the second bracket is adapted to be operably attached to second panel of the multi-panel door, and the carrier link is pivotally attached to one of the first bracket or the second bracket. The carrier link is selectively positionable in a plurality of pre-defined positions, such that at each of the pre-defined positions, the roller is disposed at a different position relative to the first bracket and the second bracket so that the roller can be spaced apart a variety of different distances from the door.

Abstract: A modular projector lift system for moving a projection device along a path between an extended position and a retracted position. The modular projector lift system includes a drive assembly expandable along a first axis. At least one movable support is mechanically engagable with the drive assembly at a plurality of positions along the first axis. The movable support moves the projection device between the extended position and the retracted position. A brake mechanism is optionally included for retaining the projection device at a particular location. The brake mechanism includes a plurality of rotating brake plates connected to the drive shaft of the drive assembly and a plurality of static brake plates connected to the drive assembly compressively engaged with the rotating brake plates. Adjustable limit switches are optionally provided for adjusting a location of the retracted and the extended positions along the path.

Abstract: A ceiling mounted projector lift system for moving audio/visual equipment between a lowered position and an operating position secured to projector lift.