Patent EP0158434A2 successfully refreshed from Google Patents.
EP0158434A2
Expired / Lapsed
EP
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Slotted autoregulating heater
Assignee: Metcal Inc
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Filing: 1985-03-05
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Granted: —
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Expires: 2005-03-05
Abstract
Abstract Designation of specific heating zones and increase in minimum resistance relative to prior heaters of the type to which the present invention pertains is achieved, together with flexibility or bendability, if desired, by slotting the outer conductor of the heater. Additional flexibility is also achieved by confining the high mu material only to those regions of the device where heating is desired, the unslotted regions.
Inventors
- 👤 John F. Krumme
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 18:29
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; B; B23; B23K; B23K3/00; B23K3/04; B23K3/047; B23K3/0475; B23K9/00; B23K9/235; H05B3/00; H05B3/10; H05B3/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
67 words
A Curie temperature autoregulating heater comprising an outer conductor having a plurality of surfaces and at least one slot in at least one of said surfaces, which slot is less in length than said surfaces, ferromagnetic material disposed adjacent a surface of said outer conductor other than adjacent said slot in said one of said surfaces, a return conductor electrically connected in series with said ferromagnetic member.
Claim 2
Dependent Claim
67 words
A Curie temperature autoregulating heater comprising an outer conductor having a plurality of surfaces and at least one slot in at least one of said surfaces, which slot is less in length than said surfaces, ferromagnetic material disposed adjacent a surface of said outer conductor other than adjacent said slot in said one of said surfaces, a return conductor electrically connected in series with said ferromagnetic member.
Claim 3
Dependent Claim
31 words
A Curie temperature autoregulating heater as defined in claim 1 wherein said outer conductor is a hollow elongated open ended structure, said ferromagnetic material being located interiorly of said hollow structure.
Claim 4
Dependent Claim
22 words
A Curie temperature autoregulating heater as defined in claim 2 wherein said ferromagnetic material is in thermal contact with said hollow structure.
Claim 5
Dependent Claim
22 words
A Curie temperature autoregulating heater as defined in claim 3 wherein said ferromagnetic material is in electrical contact with said hollow structure.
Claim 6
Dependent Claim
29 words
A Curie temperature autoregulating heater as defined in claim 2 or claim 4 wherein said one surface of said outer conductor has a plurality of spaced, generally transverse slots.
Claim 7
Dependent Claim
28 words
A Curie temperature autoregulating heater as defined in claim 5 wherein said plurality of slots are arranged along a majority of the elongated length of said hollow structure.
Claim 8
Dependent Claim
50 words
A Curie temperature autoregulating heater as defined in claim 6 wherein said elongated hollow structure is rectangular in cross-section and some of said slots extend across at least three of the sides of said hollow structure, and said ferromagnetic material is disposed adjacent the fourth side of said hollow structure.
Claim 9
Dependent Claim
30 words
A Curie temperature autoregulating heater as defined in claim 1 wherein said ferromagnetic material comprises a plurality of distinct lengths of ferromagnetic materials various of which have different Curie temperatures.
Claim 10
Dependent Claim
29 words
A Curie temperature autoregulating heater as defined in claim 8 wherein said ferromagnetic material comprises a plurality of distinct lengths of ferromagnetic-materials various of which have different Curie temperatures.
Claim 11
Dependent Claim
31 words
A Curie temperature autoregulating heater as defined in claim 2 wherein said one surface has a plurality of slots having different widths transverse to the elongated dimension of said hollow structure.
Claim 12
Dependent Claim
50 words
A Curie temperature autoregulating heater as defined in claim 1 or claim 2 further comprising means for defining zones of different rates of heating of said heater, said means including slots in the surfaces of said hollow structure to define specific current densities in different regions of said ferromagnetic material.
Claim 13
Dependent Claim
34 words
A Curie temperature autoregulating heater as defined in claim 11 further comprising means controlling the electrical resistance of said heater, said means including slots formed in various of said surfaces of said hollow structure.
Claim 14
Dependent Claim
37 words
A Curie temperature autoregulating heater as defined in claim 1 or claim 2 further comprising means controlling the electrical resistance of said heater, said means including slots formed in various of said surfaces of said hollow structure.
Claim 15
Dependent Claim
32 words
A Curie temperature autoregulating heater as defined in claim 1 wherein said ferromagnetic material is at least five skin depths thick above Curie temperature at the operating frequency of current applied thereto.
Claim 16
Dependent Claim
20 words
A Curie temperature autoregulating heater as defined -in claim 1 wherein said ferromagnetic material is less than two skin depths.
Claim 17
Dependent Claim
26 words
A Curie temperature autoregulating heater as defined in claim 15 further comprising a layer of conductive material lying between said ferromagnetic material and said outer conductor.
Claim 18
Dependent Claim
20 words
A Curie temperature autoregulating heater as defined in claim 6 wherein said slots are equally spaced along said elongated lengths.
Claim 19
Dependent Claim
28 words
A Curie temperature autoregulating heater as defined in claim 6 wherein said slots lie at an angle of other than 90° to the elongated length of said heater.
References Cited (Backward Citations)
No citation records indexed.
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