Patent US3878357A successfully refreshed from Google Patents.
US3878357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Component oven
Assignee: Texas Instruments Inc
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Filing: 1968-11-29
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Granted: 1975-04-15
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Expires: 1988-11-29
Abstract
Abstract Method and means for providing a relatively constant ambient for temperature sensitive devices is disclosed. The method includes the steps of forming an enclosure, in which the controlled ambient will lbe effected, at least partially, of a positive temperature coefficient of resistance (hereinafter referred to as PTC) material and applying a voltage to the PTC material. The material acts as a heater and also as its own temperature regulator. The enclosure is formed, at least partially, by various structures or means including a single hollow cylindrical element, a stack of annular discs and two or more pieces of PTC material. Another embodiment discloses a design particularly useful with transistor-type devices while yet another is particularly useful with diode-type devices. Several materials are disclosed which exhibit a PTC characteristic.
Inventors
- 👤 Leo Marcoux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/141; G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2401; H01; H01C; H01C7/00; H01C7/02; H01C7/022; H05B3/0014
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
An electronic assembly with built-in thermal regulation, said assembly including a thermo-sensitive device having a positive temperature coefficient and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a solid block having a plane warm face; at least one electronic component mounted on said plane face and electrically insulated therefrom, and means for applying electric power to said solid block independently of said component.
Claim 2
Dependent Claim
77 words
An electronic assembly with built-in thermal regulation, said assembly including a thermo-sensitive device having a positive temperature coefficient and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a solid block having a plane warm face; at least one electronic component mounted on said plane face and electrically insulated therefrom, and means for applying electric power to said solid block independently of said component.
Claim 3
Dependent Claim
78 words
An electronic assembly with built-in regulation, said assembly including a thermo-sensitive device having a positive temperature coefficieNt and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a substantially solid block having a plane warm face; at least one electronic component mounted juxtaposed said plane face and electrically insulated therefrom, and means for applying the electric power to said solid block independently of said compound.
Claim 4
Dependent Claim
78 words
An electronic assembly with built-in regulation, said assembly including a thermo-sensitive device having a positive temperature coefficieNt and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a substantially solid block having a plane warm face; at least one electronic component mounted juxtaposed said plane face and electrically insulated therefrom, and means for applying the electric power to said solid block independently of said compound.
Claim 5
Dependent Claim
82 words
An electronic assembly with build-in thermal regulation, said assembly including a thermo-sensitive device having a positive temperature coefficient and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a substantially solid block having a plane warm face; at least one electronic component mounted in heat transfer relation to said plane face and electrically insulated therefrom, and means for applying electric power to said solid block independently of said component.
Claim 6
Dependent Claim
82 words
An electronic assembly with build-in thermal regulation, said assembly including a thermo-sensitive device having a positive temperature coefficient and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a substantially solid block having a plane warm face; at least one electronic component mounted in heat transfer relation to said plane face and electrically insulated therefrom, and means for applying electric power to said solid block independently of said component.
Claim 7
Dependent Claim
78 words
An electronic assembly with built-in thermal regulation, said assembly including a thermo-sensitive device having a positive temperature coefficient and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a substantially solid block having a plane warm face; at least one electric component mounted on said plane face and electrically insulated therefrom, and means for applying electric power to said solid block independently of said component.
Claim 8
Dependent Claim
78 words
An electronic assembly with built-in thermal regulation, said assembly including a thermo-sensitive device having a positive temperature coefficient and a sharp resistance variation in a regulation range located on both sides of a critical reference temperature; said device being shaped as a substantially solid block having a plane warm face; at least one electric component mounted on said plane face and electrically insulated therefrom, and means for applying electric power to said solid block independently of said component.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |