Abstract: The invention comprises a belt installation tool for installing a belt on a pulley. The tool comprises a plurality of segments. The segments and the headpiece are connected by a flexible connector with a headpiece attached to one end of the string of segments. Each segment comprises a belt bearing surface and a lip for engaging a pulley rim, thereby conforming to the curve of the pulley rim. The belt bearing surface describes a tapered surface. A surface normal to the belt bearing surface on each segment urges a belt from the tool onto a pulley as the pulley is turned.

Abstract: A belt lifter for a vacuum cleaner includes a rotatable member attached to an extending arm for lifting a drive belt on and off of a drive shaft to respective connect and disconnect the belt. The rotatable member includes a lever arm which facilitates the rotation of the extending arm by providing a mechanical advantage. The lever arm is of sufficient length so as to permit hand gripping by an operator. The lever arm is movable between an operating position and a stowed position.

Abstract: A derailleur gear shift mechanism for a bicycle, in which the drive chain transfer unit for moving the chain to selected gears is operated by a rigid push-pull rod actuating linkage. An actuating lever, accessibly mounted on the bicycle frame, is indexed to specific positions at which the linkage holds the chain transfer unit in accurate alignment with individual rear wheel drive sprockets. The mechanism is adaptable to many existing derailleur gear assemblies.