Hair dryer variable control

Toilet – Nail device – Compound tools

Patent

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Details

34 91, A45D 2000

Patent

active

040033880

ABSTRACT:
In a hair dryer having an electric selectively variable motor driven fan, and plural wattage heaters in the fan stream for selectively heating the air and having thermostat means sensing air temperature to shut off the dryer on an over-temperature condition, an improvement is provided in a combination switch and sliding contact variable control for heat and speed that comprises an elongated continuous bus bar connected to one side of the line with two separate sets of discrete spaced contacts being spaced on opposite sides of the bus bar parallel thereto and to each other. Two separate sliding means are provided each being sized to bridge at least two spaced contacts in a set as it moves along the bar parallel to the other sliding means. One of the sliding means provides smooth continuous adjustment of a preferably segmented resistance in the heating circuit and the other sliding means provides smooth continuous adjustment of a preferably segmented resistance in the motor driven fan circuit for independent smooth heat adjustment and fan speed of the dryer. Additionally, an automatic pick-up structural interlocking means between the two sliding means prevents overheating by increasing the fan speed as the heat is increased.

REFERENCES:
patent: 3903905 (1975-09-01), Tucker
patent: 3911934 (1975-10-01), Helbling
patent: 3934596 (1976-01-01), Suntheimer

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