Electric heating – Heating devices – Tool or instrument
Patent
1979-09-28
1982-10-12
Bartis, A.
Electric heating
Heating devices
Tool or instrument
132 31R, 132 37R, 219240, 219242, 219505, 219506, 219533, 219543, 320 2, A45D 104, H05B 102, H05B 310
Patent
active
043540929
ABSTRACT:
An electrically heated hair curling iron includes a sheet-shaped heater with electrodes affixed to an electrically resistive layer, wrapped around an elongated cylindrical support, and capable of being rapidly heated and maintained hot by electric current available from a rechargeable storage battery. The resistive layer has a positive temperature coefficient of resistance so that its temperature is self limiting. The storage battery is contained in a handle attached to the cylindrical support, and a battery charger is disclosed which comes into electrical contact with the battery when the handle is inserted in a cavity located in the battery charger. An elongated longitudinal clip is used to retain the hair in contact with the heater; a removable cap protects the heater and clip when the iron is not in use, and also engages a switch which ensures that the iron does not remain on. The charger and the curling iron are each provided with an LED to indicate operation of the charger and state of charge of the battery, respectively.
REFERENCES:
patent: 2414351 (1947-01-01), Bender
patent: 2861163 (1958-11-01), Asakawa
patent: 3114819 (1963-12-01), Woodling
patent: 3243753 (1966-03-01), Kohler
patent: 3287684 (1966-11-01), Armbruster
patent: 3560703 (1971-02-01), Chedister
patent: 3603765 (1971-09-01), Underwood
patent: 3617694 (1971-11-01), D'Entremont
patent: 4029954 (1977-06-01), Moyer
patent: 4074110 (1978-02-01), Slaughter
patent: 4097718 (1978-06-01), Weise
patent: 4151401 (1979-04-01), Van Bokestal et al.
Fukunaga Masao
Kawamura Tadanori
Manabe Keiji
Nagakoshi Toshiaki
Nishida Takeo
Bartis A.
Matsushita Electric - Industrial Co., Ltd.
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