US3735091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated hair curling apparatus
Assignee: General Electric Co
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Filing: 1971-12-17
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Granted: 1973-05-22
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Expires: 1991-12-17
Abstract
Abstract Hair curling apparatus that employs heated air for heating hair curlers. A drum housing has bottom, side, and a removable top wall with a central opening in the top wall. An electrical resistance heating element is disposed low in the housing under a horizontal partition that forms upper and lower chambers and has openings around the partition and centrally thereof for continuous circulation of warm air from one chamber to the other. A motor-driven fan is centrally disposed in the upper chamber under the central opening and its shaft extends through the partition to a fan in the lower chamber. The motor is surrounded by a double-walled cylinder so that cool make-up air is continuously circulated through the central opening over the motor while the warmed air is continuously recirculated in the housing over the curlers.
Inventors
- 👤 F Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:00
CPC Classifications
A; A45; A45D; A45D4/00; A45D4/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
Apparatus for heating hair curlers comprising: a. a drum-shaped housing having a bottom wall, side walls, and a removable top wall having centrally disposed air passage means therethrough, b. an electrical resistance heating element secured to an electrical insulating board and located inside the housing near the bottom wall thereof, c. a horizontal curler supporting partition located above the heating element, said partition dividing the inside of the housing into a lower chamber and an upper chamber, d. air passage means through the partition at the center and near the side walls of the housing around said partition to permit continuous circulation of air from one chamber to the other, e. an electric motor located in the upper chamber at the center of the housing under said top wall passage means and having a shaft projecting through the central air passage, and f. a fan secured to said motor shaft and located in the lower chamber to provide said continuous circulation of warm air from one chamber to the other and induce outer air flow through said top wall passage means over said motor.
Claim 2
Dependent Claim
184 words
Apparatus for heating hair curlers comprising: a. a drum-shaped housing having a bottom wall, side walls, and a removable top wall having centrally disposed air passage means therethrough, b. an electrical resistance heating element secured to an electrical insulating board and located inside the housing near the bottom wall thereof, c. a horizontal curler supporting partition located above the heating element, said partition dividing the inside of the housing into a lower chamber and an upper chamber, d. air passage means through the partition at the center and near the side walls of the housing around said partition to permit continuous circulation of air from one chamber to the other, e. an electric motor located in the upper chamber at the center of the housing under said top wall passage means and having a shaft projecting through the central air passage, and f. a fan secured to said motor shaft and located in the lower chamber to provide said continuous circulation of warm air from one chamber to the other and induce outer air flow through said top wall passage means over said motor.
Claim 3
Dependent Claim
69 words
The apparatus of claim 1 wherein the centrally located electric motor is surrounded by vertical cylinder means having spaced double walls and air passage openings at the top and at the bottom in both of said double walls whereby the warm air is recirculated by said fan and said motor is insulated from said warm air by a flowing curtain of cool air through said top air passage openings.
Claim 4
Dependent Claim
29 words
The apparatus of claim 1 wherein an upwardly directed air deflector member is positioned circumferentially around the housing at the junction of the bottom wall and the side walls.
Claim 5
Dependent Claim
33 words
The apparatus of claim 3 wherein the upper chamber has a circumferential inwardly directed air deflection member secured to the side walls and located in close proximity to and above the horizontal partition.
Claim 6
Dependent Claim
26 words
The apparatus of claim 3 wherein an additional circumferential inwardly directed air deflecting member is located near the top of the side walls of the housing.
References Cited (Backward Citations)
DE538791C
Cited
GB411670A
Cited
US1986088A
Cited
GB520031A
Cited
US2408331A
Cited
US2601765A
Cited
US3454318A
Cited
US3521032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |