Patent US4037082A successfully refreshed from Google Patents.
US4037082A
Expired / Lapsed
US
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Positive temperature coefficient semiconductor heating device
Assignee: Murata Manufacturing Co Ltd
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Filing: 1976-04-30
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Granted: 1977-07-19
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Expires: 1996-04-30
Abstract
Abstract An arrangement of components for constructing a heating device employing positive temperature coefficient semiconductor (PTCS) heating elements comprising the PTCS heating element, upper and lower insulating plates, a heat emission plate and a case for entirely covering the layers of the PTCS heating element and the upper and lower insulating plates.
Inventors
- 👤 Minoru Tamada
- 👤 Takashi Shikama
- 👤 Toshikazu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:38
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H01; H01C; H01C1/00; H01C1/08; H01C1/084; H01C1/14; H01C1/1406; H01C7/00; H01C7/02; H01C7/022; H05B3/20; H05B2203/00; H05B2203/002; H05B2203/006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
233 words
A positive temperature coefficient semiconductor (PTCS) heating device comprising: a. a PTCS body having two opposed flat and mutually parallel faces; b. a first electrode means having a plurality of strips of metal film electrically connected to each other at one end thereof and being separated from each other along their respective lengths with at least one of said strips being shorter than the other strips and said first electrode means being provided on one of said two opposed faces of said PTCS body; c. a second electrode means having a plurality of strips of metal film electrically connected to each other at one end thereof and being separated from each other along their respective lengths with at least one of said strips being shorter than the other strips and said second electrode means being provided on said one of said opposed faces in such a manner that the strips of opposite electrodes are alternately disposed on said one face so that adjacent strips of the respective strips are members of different ones of said first and second electrode means; d. a first terminal of a pair of terminals for applying a predetermined voltage to said first electrode means and provided on the other of said opposed faces at such a position that said first terminal does not overlap, through the PTCS body, with any of the strips of said second electrode means;
Claim 2
Dependent Claim
233 words
A positive temperature coefficient semiconductor (PTCS) heating device comprising: a. a PTCS body having two opposed flat and mutually parallel faces; b. a first electrode means having a plurality of strips of metal film electrically connected to each other at one end thereof and being separated from each other along their respective lengths with at least one of said strips being shorter than the other strips and said first electrode means being provided on one of said two opposed faces of said PTCS body; c. a second electrode means having a plurality of strips of metal film electrically connected to each other at one end thereof and being separated from each other along their respective lengths with at least one of said strips being shorter than the other strips and said second electrode means being provided on said one of said opposed faces in such a manner that the strips of opposite electrodes are alternately disposed on said one face so that adjacent strips of the respective strips are members of different ones of said first and second electrode means; d. a first terminal of a pair of terminals for applying a predetermined voltage to said first electrode means and provided on the other of said opposed faces at such a position that said first terminal does not overlap, through the PTCS body, with any of the strips of said second electrode means;
Claim 3
Dependent Claim
191 words
e. a second terminal of said pair of terminals, said second terminal electrically connected to said second electrode means and provided on said other of said opposed faces at such a position that said second terminal does not overlap, through the PTCS body, with any of the strips of said first electrode; f. a lower insulating means provided on a lower face of said two faces of the PTCS body for electrically insulating said electrodes; g. an upper insulating means provided on an upper face of said two faces of the PTSC body for electrically insulating said terminals; h. a metallic heat emission plate provided directly below said lower insulating means for emitting heat therefrom obtained from said PTCS heating element through said lower insulating means; i. a metallic case means for entirely covering said PTCS heating element and said lower and upper insulating means together with said heat emission plate; and j. a pair of terminal units each having base portions for electrically connecting with corresponding said terminals and a pin portion extending outwardly from said case means through said upper insulating means for connecting to an electrical power supply.
Claim 4
Dependent Claim
191 words
e. a second terminal of said pair of terminals, said second terminal electrically connected to said second electrode means and provided on said other of said opposed faces at such a position that said second terminal does not overlap, through the PTCS body, with any of the strips of said first electrode; f. a lower insulating means provided on a lower face of said two faces of the PTCS body for electrically insulating said electrodes; g. an upper insulating means provided on an upper face of said two faces of the PTSC body for electrically insulating said terminals; h. a metallic heat emission plate provided directly below said lower insulating means for emitting heat therefrom obtained from said PTCS heating element through said lower insulating means; i. a metallic case means for entirely covering said PTCS heating element and said lower and upper insulating means together with said heat emission plate; and j. a pair of terminal units each having base portions for electrically connecting with corresponding said terminals and a pin portion extending outwardly from said case means through said upper insulating means for connecting to an electrical power supply.
Claim 5
Dependent Claim
26 words
A PTCS heating device as claimed in claim 1, wherein said lower insulating means is a plate made of electrically insulating and high heat conductive material.
Claim 6
Dependent Claim
26 words
A PTCS heating device as claimed in claim 2, wherein said upper insulating means is a plate made of electrically insulating and high heat conductive material.
Claim 7
Dependent Claim
53 words
A PTCS heating device as claimed in claim 2, wherein said upper insulating means is a pair of bushings each provided around a pin portion of said terminal unit and having shoulder-like edge portions for engaging with said case means, thereby maintaining predetermined clearance between the case means and the PTCS heating element.
Claim 8
Dependent Claim
28 words
A PTCS heating device as claimed in claim 4, further comprises electrically insulating injected material injected in said clearance through a suitable opening formed in the case means.
Claim 9
Dependent Claim
28 words
A PTCS heating device as claimed in claim 2, wherein said upper insulating means is an injected material injected through a suitable opening formed in the case means.
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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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |