Patent US3784784A successfully refreshed from Google Patents.
US3784784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hair curler heating device with electric resistance cable
Assignee: US Philips Corp
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Filing: 1971-11-08
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Granted: 1974-01-08
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Expires: 1991-11-08
Abstract
Abstract A hair curler heater device having a base plate and a plurality of hollow cylindrical fingers mounted on and projecting from the base plate for receiving a hair curler to be heated. An electric resistance heating cable having high and low temperature sectors is arranged for heating the fingers. The high temperature sectors are accommodated within the fingers and the low temperature sectors are provided in the base plate. The heating cable has a core of flexible non-conducting material and a heating wire helically wound about the core so as to form the high and low temperature sectors. The low temperature sectors are formed by an odd number of layers of heating wire wound around the core in electrical contact with each other to form a plurality of partial resistors electrically connected in parallel. Alternate layers of the cold sectors are wound about the core in the same direction as the heating wire is wound about the core in the high temperature sectors and the number of layers in each of the low temperature sectors exceeds the number of layers in each high temperature sector by at least two.
Inventors
- 👤 L Geominy
- 👤 H Gommans
- 👤 L Mans
- 👤 S Ruytenbeek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:54
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
A hair curler heater device comprising a base plate, at least one hollow cylinder mounted on and projecting from said base plate for receiving thereon a hair curler to be heated, an electric resistance heating cable having high and low temperature sectors arranged for heating said hollow cylinder, said high temperature sector being accommodated within said cylinders and said low temperature sectors being provided in said base plate, said heavint cable comprising a core of flexible non-conducting material, a heating wire helically wound about said core so as to form said high and low temperature sectors, said low temperature sectors being formed by an odd number of layers of heating wire in electrical contact with each other, alternate layers being wound about said core in the same direction as the heating wire wound about the core through the high temperature sector, said number of layers in the low temperature sector exceeding the number of layers in the high temperature sector by at least two, and an electrically insulating coveRing about said cable.
Claim 2
Dependent Claim
172 words
A hair curler heater device comprising a base plate, at least one hollow cylinder mounted on and projecting from said base plate for receiving thereon a hair curler to be heated, an electric resistance heating cable having high and low temperature sectors arranged for heating said hollow cylinder, said high temperature sector being accommodated within said cylinders and said low temperature sectors being provided in said base plate, said heavint cable comprising a core of flexible non-conducting material, a heating wire helically wound about said core so as to form said high and low temperature sectors, said low temperature sectors being formed by an odd number of layers of heating wire in electrical contact with each other, alternate layers being wound about said core in the same direction as the heating wire wound about the core through the high temperature sector, said number of layers in the low temperature sector exceeding the number of layers in the high temperature sector by at least two, and an electrically insulating coveRing about said cable.
Claim 3
Dependent Claim
144 words
A hair curler heater device comprising a base plate, at least one hollow cylinder mounted on and projecting from said base plate for receiving thereon a hair curler to be heated, an electric resistance heating cable having high and low temperature sectors arranged for heating said hollow cylinder, said high temperature sector being accommodated within said cylinders and said low temperature sectors being provided in said base plate, said heating cable comprising a core of flexible non-conducting material, a heating wire helically wound about said core so as to form said high and low temperature sectors, said low temperature sectors comprising means cooperating with said heating cable to define a plurality of partial resistors electrically connected in parallel, each resistor conveying only part of the current conveyed by the heating wire in the high temperature sector, and an electrically insulating covering about said cable.
Claim 4
Dependent Claim
144 words
A hair curler heater device comprising a base plate, at least one hollow cylinder mounted on and projecting from said base plate for receiving thereon a hair curler to be heated, an electric resistance heating cable having high and low temperature sectors arranged for heating said hollow cylinder, said high temperature sector being accommodated within said cylinders and said low temperature sectors being provided in said base plate, said heating cable comprising a core of flexible non-conducting material, a heating wire helically wound about said core so as to form said high and low temperature sectors, said low temperature sectors comprising means cooperating with said heating cable to define a plurality of partial resistors electrically connected in parallel, each resistor conveying only part of the current conveyed by the heating wire in the high temperature sector, and an electrically insulating covering about said cable.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |