Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1978-12-15
1980-09-30
Reynolds, B. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
34 98, 219370, H05B 302, A45D 2010
Patent
active
042257751
ABSTRACT:
A hair dryer is provided having a first cup-shaped plastic housing with an air inlet and generally tangentially directed outlet to be connected to a hose coupling and thence to a soft bonnet on the head of the user. A sheet metal plate provides a motor and other internal components on one side and a fan on the opposite side with the fan directing air through the outlet. A second plastic cup-shaped housing is provided facing the first and the housing are secured together with the plate between them, the hair dryer having a controlled air heater in the outlet. To this general overall arrangement an improvement comprises a heater formed in the shape of a cone in at least one plane of the outlet and secured to a mounting plate covering the outlet such that, with the housing, the mounting plate and housing form the outlet duct which is faired to form a substantial rectangular-to-round outlet path. The heater has the apex of the cone directed upstream with the arrangement allowing the heater and mounting plate assembly to direct the air flow from rectangular-to-round to minimize air flow restriction to the outlet and the heater provides a constantly increasing heater surface to improve heat transfer to the outlet air. Additionally, the outlet is formed on a radius from the center of the housings to reduce the maximum dimension of the dryer.
REFERENCES:
patent: 901871 (1908-10-01), Blanchard
patent: 1468593 (1924-09-01), Erb
patent: 1490088 (1924-04-01), Bridges
patent: 2677041 (1954-04-01), Oliver et al.
patent: 2730609 (1956-01-01), Constantinesco
patent: 3095496 (1963-06-01), Omohundro
patent: 3304625 (1967-02-01), Gesmar
Cullen John F.
General Electric Company
Platt Leonard J.
Powers George R.
Reynolds B. A.
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