Patent US3739142A successfully refreshed from Google Patents.
US3739142A
Expired / Lapsed
US
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Electric blanket having auxiliary heating element
Assignee: Individual
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Filing: 1972-02-01
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Granted: 1973-06-12
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Expires: 1992-02-01
Abstract
Abstract Presented is an electric blanket construction in which the conventional heating element adapted to transmit heat over the major area of the blanket is augmented by an auxiliary heating element which is superimposed over a portion of the conventional heating element to increase the transmission of heat from a selected portion of the blanket.
Inventors
- 👤 J Johns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:43
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
In an electric blanket having top and bottom layers, the combination comprising: a. a primary heating element encompassing substantially the entire area of said blanket so as to provide a uniform degree of heat over the entire area when said primary heating element is energized; b. an auxiliary heating element superimposed over a selected portion of said primary heating element and superimposed over a substantially smaller selected area of said blanket so as to provide an increase in the degree of heat over said substantially smaller selected area when both the primary and auxiliary heating elements are energized and a selected degree of heat only to said smaller selected area when said primary heating element is deenergized and said auxiliary heating element is energized; and c. control means operatively associated with said primary and auxiliary heating elements and selectively operable to independently energize each said heating element.
Claim 2
Dependent Claim
147 words
In an electric blanket having top and bottom layers, the combination comprising: a. a primary heating element encompassing substantially the entire area of said blanket so as to provide a uniform degree of heat over the entire area when said primary heating element is energized; b. an auxiliary heating element superimposed over a selected portion of said primary heating element and superimposed over a substantially smaller selected area of said blanket so as to provide an increase in the degree of heat over said substantially smaller selected area when both the primary and auxiliary heating elements are energized and a selected degree of heat only to said smaller selected area when said primary heating element is deenergized and said auxiliary heating element is energized; and c. control means operatively associated with said primary and auxiliary heating elements and selectively operable to independently energize each said heating element.
Claim 3
Dependent Claim
61 words
The combination according to claim 1, in which said primary heating element is comprised of a resistance member oriented in sections extending longitudinally the full length of said blanket, and said auxiliary heating element is comprised of a resistance member having sections oriented parallel with corresponding sections less than the full length of the resistance member of said primary heating element.
Claim 4
Dependent Claim
30 words
The combination according to claim 1, in which each said heating element is provided with an independent prong plug for attachment to a source of power through said control means.
Claim 5
Dependent Claim
55 words
The combination according to claim 1, in which an auxiliary layer of woven material is superimposed over a portion of said primary heating element adjacent one end thereof, said auxiliary heating element is independently attached to said auxiliary layer of woven material, and said top layer of the blanket is superimposed over the entire assembly.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |