Abstract: A garage door carrier system carries an overhead garage door between a closed position blocking entry of a vehicle into a garage, and an open position allowing entry of the vehicle into the garage. The garage door is in rolling engagement with a track that guides the garage door. A lever, rotating about a pivot, has a counterweight at a first end and is rotatably connected to the garage door at a second opposite load end. The counterweight provides in-force at the first end that translates as out-force at the load end as the lever rotates about the pivot to carry the garage door between the closed position and the open position.

Abstract: A garage door carrier system carries an overhead garage door between a closed position blocking entry of a vehicle into a garage, and an open position allowing entry of the vehicle into the garage. The garage door is in rolling engagement with a track that guides the garage door. A lever, rotating about a pivot, has a counterweight at a first end and is rotatably connected to the garage door at a second opposite load end. The counterweight provides in-force at the first end that translates as out-force at the load end as the lever rotates about the pivot to carry the garage door between the closed position and the open position.

Abstract: A vertically extensible mechanism for controlling displacement of a panel such as an advertising sign, moves the structure between vertically spaced raised and lowered positions. The mechanism comprises a pair of vertically oriented laterally spaced guide tracks each having two or more elongate track sections that are telescopically extensible. The panel is carried in a vertical orientation between the guide tracks which are anchored to a mounting to extend vertically thereon. The mounting can be an elevated one, e.g. in a roof structure, or in a building wall above a door opening, or a low level mounting, e.g. on a ground surface or floor. In an alternative arrangement that is particularly suitable for the provision of elevated display signs and banners, the guide tracks are dispensed with and the panel is supported on a plurality of flexible straps or the like which are wound around a shaft extending horizontally at an elevated location.

Abstract: A counterweight system for an overhead door or like installation includes an elongate flexible belt having a series of pockets to receive weights, the belt being suspended at the side of the door from a cable that passes over a pulley and is attached to the lower end of the door, the lower end of the belt being connected to the door frame about halfway in the height of the door such that when the door moves in the opening direction the weights are successively suspended from the fixed attachment point so that the opening force applied to the door accurately counterbalances the effective weight of the door at all points in the opening movement.