Abstract: A detergent dispensing system for sequentially and automatically injecting various liquid products (e.g., detergents, fabric conditioners, neutralizers, etc.) into a laundry washing machine. Each liquid product is independently connected to a venturi-aspirator positioned within separate carrier fluid conduits (e.g. water conduits) and the product is drawn into the respective carrier fluid conduits upon passage of carrier fluid therethrough. Electrical control circuitry, including electrical timing apparatus, triggered by a signaling device synchronized with the machine washing cycle selectively actuates and deactuates a solenoid-operated valve positioned upstream of each venturi-aspirator so as to allow injection into the carrier fluid of a predetermined quantity of each liquid product at the desired point in the machine cycle.

Abstract: Apparatus and logic circuitry for selection of a desired wash program in a laundry machine in which multiple programs are available and occupy zones of varied extent on a continuous program surface. An indexing surface is connected to and moves with the program surface. The indexing surface is divided into a plurality of tracks, each of which is marked to identify the position and extent of a distinct program encoded on the program surface. Individual pushbutton selection switches provide power to enable individual sensing switches paired with the tracks. An enabled switch senses the markings defining the program selected by actuation of a particular pushbutton. The pushbutton switch enabling an individual sensing switch also actuates an indexing drive which rapidly and automatically drives the indexing surface to a position where the enabled sensing switch senses a program point corresponding to the beginning of the selected program.