Abstract: An automatic flow shift valve for use with swimming pool cleaning systems including a pool skimmer system for removing floating debris from the surface of the pool and an underwater pool cleaner system for removing debris from the floor of the pool, both of such systems operating through water suction by the periodic "on" and "off" cyclic operation of a suction pump. The valve is mounted over a flow orifice in a cover plate which is removably secured across the top of the well and removable debris basket of the skimmer and the underwater pool cleaner is connected by a hose to a second opening in the cover plate. The valve includes a central, fixed-position shift cylinder enclosing upper and lower spaced, but interconnected, pistons which are reciprocative within the shift cylinder. The upper piston is spring biased upwardly to open the valve when the pump is "off".

Abstract: An automatic swimming pool chlorinator having a submersible canister for receiving and containing chlorine tablets or sticks.

Abstract: A vacuum powered automatic swimming pool cleaning device having a hollow housing supported on two pairs of device mover wheels. The housing includes a central water suction chamber in water flow communication with a water suction trough at the bottom of the housing and in water outlet communication with an external vacuum line, a gear train for driving one of the pairs of mover wheels, and pivoted directional control floats. The water suction chamber houses an axle mounted turbine wheel bearing water driven vanes with the turbine being rotated in one direction only by water flow through the chamber. The turbine axle bears a turbine power output drive gear which intermeshes with one or the other of two shift gears which in turn reversibly drive the gear train as dictated by the position of the directional control floats within the housing.