Abstract: A linear actuator for a platform having a frame with an open end and a platform moveable within the frame, said platform driven by a motor powered axle mounted traversely to the platform. The platform is driven by a drive system powered by the motor driven axle and generally having a pair of fixed pitch independent devices, such as chains, each chain mounted at each of its ends to the frame and aligned with the platform's axis of travel, a double drive sprocket adjacent an end of the axle, a pair of double idler pulleys aligned substantially with a chain, a pair of single idler pulleys aligned substantially with the other chain. Each chain is routed through the double drive sprocket and one chain routes through the double idler pulley, while the other chain routes trough the both the double idler pulleys and the pair of single idler pulleys.

Abstract: A hanger assembly for a sliding screen door comprises a horizontally mounted track that fits within a standard door header and roller assembly, preferably one roller assembly per side of the screen door. Each roller assembly comprises at least a roller, and preferably two per roller assembly, and a holder that connects the roller(s) to the screen door. The holder includes a connecting bar portion that attaches to the roller(s) and a generally U shaped bracket portion that extends downwardly from the connecting bar portion, whereby the screen door is positioned and held snugly within the U shaped portion. A side of the bracket U shaped portion includes a slot for vertically and/or horizontally adjusting the screen by positioning of attachment means through the slot such as a screw.

Abstract: A covering and locking device for the open end of a mausoleum crypt having a rigid plate sized to fit into the open end. The plate has a centrally hole through it sized to receive a small pin or other tool for actuating the lock. A plurality of radially sliding locking rods, each rod spaced equally apart from the other, are positioned on the rear face of the plate. A housing for each rod is positioned over the end of its respective rod and is attached to the rear face adjacent outer edges of the plate. A spring encircles each rod and is positioned within the housing, and one end of each spring is attached to its respective rod, while the other end of each spring is attached to its respective housing. A rod restraining clip is removably positioned over the outer ends of the rods and the centrally located hole so that rods remain in the unlocked position until the lock is ready to be used.