Abstract: The service window is constructed from a universal extruded framing member which can be cut to any desired window dimensions. A bell crank linkage with hip actuator or either of the pair of handles can be used to swing both doors open simultaneously about their respective vertical hinges. The bell crank linkage is mechanically efficient and space saving, and includes an automatic spring return mechanism. The handles are located over center with respect to the hinges. A U-shaped channel-formed member with wedge-shaped insert slips over the handles to prevent the window from being opened. The innermost edges of the handles confront the wedge insert to prevent the handles from following the arc trajectories followed during opening. These trajectories pass closest as they cross the plane between vertical hinges, thus, the wedge insert provides a solid, stable locking condition which is not readily jarred loose by vibration or prying.

Abstract: A battery powered trash collector mountable on a cart in which the collector, comprised of a pivoted cylindrical bin having a hinged lid surmounted by a vacuum blower, is mounted on a frame to the cart. A flexible hose of inverted U-shape has a nozzle at its outer end adapted for abutting, nozzle closing engagement with the ground or other surface and is supported by a leaf spring secured to the hinged lid. The nozzle is controlled by a handle through a telescoping connection secured to the hose, and a pair of electrical energy sources are provided for energizing the D.C. motor driven vacuum blower. A switch is provided in the handle of the telescoping connection for momentarily energizing the motor while a series/parallel speed controller switch is provided for selectively energizing the motor at one of two given speeds for maximum energy efficiency.

Abstract: A battery powered trash collector mountable on a cart in which the collector, comprised of a pivoted cylindrical bin having a hinged lid surmounted by a vacuum blower, is mounted on a frame to the cart. A flexible hose of inverted U-shape has a nozzle at its outer end adapted for abutting, nozzle closing engagement with the ground or other surface and is supported by a leaf spring secured to the hinged lid. The nozzle is controlled by a handle through a telescoping connection secured to the hose, and a pair of electrical energy sources are provided for energizing the D.C. motor driven vacuum blower. A switch is provided in the handle of the telescoping connection for momentarily energizing the motor while a series/parallel speed controller switch is provided for selectively energizing the motor at one of two given speeds for maximum energy efficiency.