Simplified multiple speed hair dryer

Details Simplified multiple speed hair dryer Simplified multiple speed hair dryer

1979-09-10

1982-04-27

Reynolds, B. A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219370, A45D 2010, H05B 102

Patent

active

043272789

ABSTRACT:
A simplified four heat, two speed hair dryer is provided having a housing with a plurality of heating elements mounted therein and a fan driven by a motor for blowing air over the heating elements and delivering hot air from the dryer. A source of alternating current potential is provided across a bridge rectifier motor control circuit in the housing. A dc motor which drives the fan for the dryer is coupled across the bridge rectifier circuit. A switch is coupled to one arm of the bridge rectifier circuit for switching the arm in and out of the bridge rectifier circuit. When the switch is activated, the motor is operated by a full wave rectified source which operates the motor at high speed. When the switch is open, a half wave rectified source is applied to the motor thereby operating the motor at a lower speed. This simple motor speed control circuit with a minimum number of heater elements and two other switches provides a four heat, two speed dryer without the need for incorporating additional speed control circuitry or heater elements.

REFERENCES:
patent: 3358205 (1967-12-01), Wechsler
patent: 3518522 (1970-06-01), Jaffe et al.
patent: 3937231 (1976-02-01), Tucker et al.
patent: 3947659 (1976-03-01), Ono
patent: 4003388 (1977-01-01), Nopanen
patent: 4085309 (1978-04-01), Godel et al.
patent: 4088869 (1978-05-01), Nopanen

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