Remote control for vacuum cleaner motor

Claim 1

A remote control arrangement for a vacuum cleaner provided with a motor having an electrical energy source, a flexible hose, a cleaning appliance, a coupling means operatively connecting the flexible hose with the cleaning appliance, said coupling means also functioning as a hand grip comprising a. an electrical circuit adapted to connect the source of electrical energy to the motor and including 1. a thyristor device provided with a phase shifting network controlling the power input to the motor, 2. a standard type transformer generating a conventional hysteresis curve in which the primary winding thereof is a first variable impedance that is a part of the phase shifting network, 3. a second variable impedance including the secondary winding of the transformer and a variable resistor located at a distance from the motor, an operating member for the variable resistor located on said hand grip, and a low voltage conduit positioned on said hose coupling the variable resistor to the secondary winding of the transformer, 4. the magnitude of the first variable impedance which affects the phase shifting network being dependent upon and changeable by the second variable impedance, 5. said phase shifting network including a capacitor coupled in parallel to the primary winding of said transformer whereby a desirable curve shape of said control pulses of said thyristor is produced.