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US3598959A
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Method for partially increasing heat to be generated in a heat-generating pipe utilizing skin effect current
Assignee: JNC Corp
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Filing: 1970-08-06
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Granted: 1971-08-10
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Expires: 1990-08-06
Abstract
Abstract In a heat-generating pipe composed of a ferromagnetic pipe or pipes and an insulated wire passing therethrough, and having such a circuit that alternating current flowing through said ferromagnetic pipe flows concentratedly only on the inner skin portion of the ferromagnetic pipe, the ferromagnetic pipe is cut and divided into two portions, within a section where increase of heat to be generated is required, and the two points on the outer surfaces of the divided ferromagnetic pipes at both the ends of the section are connected by a conductor, whereby, within the section, AC flows also on the outer skin portion of the ferromagnetic pipes, and the amount of heat to be generated within the section is increased. Further, within the section, a ferromagnetic ring or rings are strung on the ferromagnetic pipe(s), whereby an induction current flows on the ring(s) correspondingly to the AC flowing through the outer skin portions of the ferromagnetic pipe(s), and the amount of heat to be generated within the section can be further increased.
Inventors
- 👤 Masao Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L53/00; F16L53/30; F16L53/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
In a heat-generating pipe utilizing skin effect current, composed of a ferromagnetic pipe or pipes and an insulated wire passing through the inside thereof, and having such a circuit that when an alternating current is passed through the insulated wire, a current flowing through said ferromagnetic pipe(s) correspondingly to the alternating current flowing through the insulated wire, flows concentratedly only on the inner skin portion of said ferromagnetic pipe(s), a method for partially increasing the amount of heat to be generated in said heatgenerating pipe utilizing skin effect current which comprises cutting and dividing said ferromagnetic pipe into two portions, within a section where increase of heat to be generated is desired, and connecting the two points (18 and 18'') on the outer surfaces of the divided pipe portions at both the ends of the section by an electrical conductor, whereby, within the section, the current flows through not only the inner skin portions but also the outer skin portions of the pipe portions within the section.
Claim 2
Dependent Claim
167 words
In a heat-generating pipe utilizing skin effect current, composed of a ferromagnetic pipe or pipes and an insulated wire passing through the inside thereof, and having such a circuit that when an alternating current is passed through the insulated wire, a current flowing through said ferromagnetic pipe(s) correspondingly to the alternating current flowing through the insulated wire, flows concentratedly only on the inner skin portion of said ferromagnetic pipe(s), a method for partially increasing the amount of heat to be generated in said heatgenerating pipe utilizing skin effect current which comprises cutting and dividing said ferromagnetic pipe into two portions, within a section where increase of heat to be generated is desired, and connecting the two points (18 and 18'') on the outer surfaces of the divided pipe portions at both the ends of the section by an electrical conductor, whereby, within the section, the current flows through not only the inner skin portions but also the outer skin portions of the pipe portions within the section.
Claim 3
Dependent Claim
44 words
A method according to claim 1, wherein a substance which has an electrically inferior but thermally good conductivity, is filled in the clearance space between the ferromagnetic pipe portions and an object to be heated, within said section to improve the heat conductivity therebetween.
Claim 4
Dependent Claim
26 words
A method according to claim 2, wherein said substance which has an electrically inferior but thermally good conductivity is a heat-conductive cement composed mainly of graphite.
Claim 5
Dependent Claim
52 words
A method according to claim 1, wherein the electrical conductor connecting the two points (18, 18'') is a box composed of a plate or plates of ferromagnetic material having each a thickness more than twice the depth of the skin effect current and containing therein the ferromagnetic pipe portions within the section.
Claim 6
Dependent Claim
25 words
A method according to claim 1, wherein one or more rings of a ferromagnetic material are strung on the ferromagnetic pipe portions within said section.
Claim 7
Dependent Claim
47 words
A method according to claim 5, wherein a substance which has an electrically inferior but thermally good conductivity, is filled in the clearance space among said ferromagnetic pipe portions, said rings and the object to be heated, within said section to improve the heat conductivity among them.
Claim 8
Dependent Claim
26 words
A method according to claim 6, wherein said substance which has an electrically inferior but thermally good conductivity is a heat-conductive cement composed mainly of graphite.
Claim 9
Dependent Claim
70 words
A method according to claim 5, wherein the electrical conductor connecting the two points (18, 18'') on the outer surfaces of the divided pipe portions at both ends of the section, is a box composed of a plate or plates of a ferromagnetic material having a thickness more than twice the depth of the skin effect current and accommodating therein the ferromagnetic pipe portions and the rings within the section.
References Cited (Backward Citations)
US3524966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |