Elastic hair dryer having selectively variable air output temper

Details Elastic hair dryer having selectively variable air output temper Elastic hair dryer having selectively variable air output temper

1975-12-31

1982-02-16

Bartis, A.

Electric heating

Heating devices

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

34 97, 165 96, 165103, 165122, 219367, 219374, 219375, 219381, 219505, A45D 2010, F24H 304, H05B 312

Patent

active

043160778

ABSTRACT:
A hair dryer for use in personal beauty care incorporates a blower for moving a stream of air through a dryer housing onto the hair. A self-regulating, disc-shaped, electrical resistance heater body formed of a ceramic material of positive temperature coefficient of resistivity (PTC) and having a multiplicity of air flow passages extending between the opposite faces thereof is arranged the housing for heating the air stream. The heater body is mounted for rotational movement between a first position wherein the passages are parallel to the air flow direction so that substantially all of the air stream is directed through the passages and a second position wherein the passages are oblique to the air flow direction so that a substantial part of the air stream passes around the heater body without passing through the passages, whereby the temperature of the heated air directed onto the hair can be selectively varied by rotating the heater body to adjust the proportion of the air stream which is allowed to flow through the heater body passages. The heater body may be provided with baffles to maintain the air flow constant while the air temperature is varied by rotation of the heater body.

REFERENCES:
patent: 1626400 (1927-04-01), Frank
patent: 1707554 (1929-04-01), Hendry
patent: 2147283 (1939-02-01), Covell
patent: 3305665 (1967-02-01), Laing
patent: 3674980 (1972-07-01), Cox
patent: 3927300 (1975-12-01), Wada

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