US3874075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of an inductive component element
Assignee: Siemens AG
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Filing: 1973-10-26
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Granted: 1975-04-01
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Expires: 1993-10-26
Abstract
Abstract A method for producing an inductive component element in which a magnetic core is covered at least partially with a non-magnetic, metallic layer which is thereafter impacted with a laser beam to partially sever selected portions of the metallic layer from other portions thereof to the finally generally helically shaped inductive coil, a layer of insulating material being interposed between the metallic layer and the magnetic core if the latter is constructed of a magnetic material having insufficient insulating properties.
Inventors
- 👤 Hartwig Lohse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:43
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/041; H01F41/046; B; B23; B23K; B23K26/00; B23K26/36; B23K26/40; H01F17/00; H01F17/04; B23K2103/00; B23K2103/50; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A method for the production of an inductive component element, comprising the steps of applying a non-magnetic layer to and at least partially covering a magnetic core of rectangular, ring-shaped configuration having generally oppositely disposed faces connected by respective edge portions, and impacting the layer with a laser beam, incident at an angle of less than 90*, to partially sever selected portions of the layer from other portions thereof on both the faces and adjoining edge portions, and thereby define a generally helically shaped inductive coil.
Claim 2
Independent Claim
86 words
A method for the production of an inductive component element, comprising the steps of applying a non-magnetic layer to and at least partially covering a magnetic core of rectangular, ring-shaped configuration having generally oppositely disposed faces connected by respective edge portions, and impacting the layer with a laser beam, incident at an angle of less than 90*, to partially sever selected portions of the layer from other portions thereof on both the faces and adjoining edge portions, and thereby define a generally helically shaped inductive coil.
Claim 3
Dependent Claim
29 words
A method according to claim 1, comprising the further step of applying an insulating intermediate layer directly upon the magnetic core prior to the application of said metallic layer.
Claim 4
Dependent Claim
54 words
A method according to claim 1, wherein a selected base and edge portions are initially impacted, the core rotated through 180* about an axis operative to correspondingly dispose the other face of the core and corresponding edge portions for beam impact, and thereafter impacting the last-mentioned face and edge portions with said laser beam.
Claim 5
Independent Claim
163 words
A method for the production of an inductive component element, comprising the steps of applying a non-magnetic metallic layer to and at least partially covering a magnetic core of ring-like configuration, comprising a pair of spaced longitudinally extending side portions connected at their ends by respective transversely extending side portions, impacting the layer with a laser beam to partially sever selected portions of the layer from other portions thereof, while advancing the core in the direction of the longitudinal side portions (Y-direction) by an amount to provide a desired spiral pitch, and reciprocating back and forth in the direction of its transverse side portions (X-direction) by an amount which is greater than the width of the longitudinal side portions, subsequently rotating the ring core 180* about an axis in the X-Y plane, and repeating such advancing and reciprocating steps while impacting the core, whereby the metallic layer is divided into a generally helically shaped inductive coil by the action of said laser beam.
Claim 6
Independent Claim
163 words
A method for the production of an inductive component element, comprising the steps of applying a non-magnetic metallic layer to and at least partially covering a magnetic core of ring-like configuration, comprising a pair of spaced longitudinally extending side portions connected at their ends by respective transversely extending side portions, impacting the layer with a laser beam to partially sever selected portions of the layer from other portions thereof, while advancing the core in the direction of the longitudinal side portions (Y-direction) by an amount to provide a desired spiral pitch, and reciprocating back and forth in the direction of its transverse side portions (X-direction) by an amount which is greater than the width of the longitudinal side portions, subsequently rotating the ring core 180* about an axis in the X-Y plane, and repeating such advancing and reciprocating steps while impacting the core, whereby the metallic layer is divided into a generally helically shaped inductive coil by the action of said laser beam.
Claim 7
Dependent Claim
52 words
A method according to claim 4, comprising impacting the metallic layer with such laser beam at an angle of approximately 45* with respect to the XY-plane and at an angle with respect to the X- or Y-axis, respectively, at an angle determined by the ring core thickness and the desired spiral pitch.
Claim 8
Dependent Claim
29 words
A method according to claim 5, comprising the further step of applying an insulating intermediate layer directly upon the magnetic core piror to the application of said metallic layer.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |