US3680806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding mandrel
Assignee: Siemens AG
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Filing: 1970-09-30
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Granted: 1972-08-01
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Expires: 1990-09-30
Abstract
Abstract A winding mandrel for winding webs of a conductor and a dielectric in the formation of an electric capacitor may be made of a plastic material to which the webs may be attached and is of a length less than the width of the webs so that when it is left in place in the completed capacitor the mandrel will have its ends recessed inwardly from the outer end faces of the completed capacitor. To facilitate winding of webs on the shorter winding mandrel the generally cylindrical body member of the mandrel has opposite first and second ends with at least one of the ends having a configuration including a self-centering bore and a tooth means. The bore is in the shape of a conicalfrustrum with a cone shaped smaller inner end. The tooth means includes a plurality of teeth shaped complementary to a winding chuck means. Each tooth is configured to have a generally flat surface lying in a generally longitudinal plane with a sloping surface adjacent the inner end of the flat surface and extending upwardly therefrom. The outer end of the generally flat surface intersects a narrow generally planar surface extending generally transverse to both the axis of the body member and the flat surface. The opposite edge of the narrow planar surface intersects the upwardly sloping surface from the next adjacent tooth. Four teeth are advantageously provided on an end. The teeth may be provided on both ends and may be set to have the sloping surface face in the same or opposite directions on each end. Mandrels of different lengths may be provided with each different length having a different color for identification.
Inventors
- 👤 Georg Obermaier
- 👤 Anton Stangl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:04
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/30; H; H01; H01G; H01G13/00; H01G13/02; Y; Y10; Y10S; Y10S242/00; Y10S242/912
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
196 words
A winding mandrel for winding webs of a conductor and a dielectric in the formation of an electrical capacitor comprising a generally cylindrical body member having first and second ends, each of said first and second ends having an outer end face, said outer end faces having tooth means thereon, said ends having a dead end bore therein, said bores extending from their respective end face into the winding mandrel body member; and At least one of said end face tooth means thereon adapted to engage a winding means, said bore having a first portion and a second portion; said first portion of said bore being in the shape of a conicalfrustrum with a larger diameter on the outside near the end face and a smaller diameter on the inside near the dead end, said second portion being of a conical configuration and forming said dead end, said tooth means including a plurality of teeth each having a generally flat surface lying in a generally longitudinal plane and a sloping surface adjacent said flat surface; said sloping surfaces extending from said flat surfaces of said teeth in the same direction on said first and second ends.
Claim 2
Dependent Claim
196 words
A winding mandrel for winding webs of a conductor and a dielectric in the formation of an electrical capacitor comprising a generally cylindrical body member having first and second ends, each of said first and second ends having an outer end face, said outer end faces having tooth means thereon, said ends having a dead end bore therein, said bores extending from their respective end face into the winding mandrel body member; and At least one of said end face tooth means thereon adapted to engage a winding means, said bore having a first portion and a second portion; said first portion of said bore being in the shape of a conicalfrustrum with a larger diameter on the outside near the end face and a smaller diameter on the inside near the dead end, said second portion being of a conical configuration and forming said dead end, said tooth means including a plurality of teeth each having a generally flat surface lying in a generally longitudinal plane and a sloping surface adjacent said flat surface; said sloping surfaces extending from said flat surfaces of said teeth in the same direction on said first and second ends.
Claim 3
Dependent Claim
35 words
A winding mandrel according to claim 1 wherein said mandrel length is less than the width of the said webs of material wound thereon and wherein said body member consists of an electrically insulating material.
Claim 4
Dependent Claim
27 words
A winding mandrel according to claim 1 wherein each sloping surface intersects a narrow, generally planar surface extending generally transverse to the axis of said body member.
Claim 5
Dependent Claim
25 words
A winding mandrel according to claim 1 wherein a plurality of mandrel lengths are provided, each of said different mandrel lengths having a different color.
Claim 6
Dependent Claim
233 words
A winding mandrel for winding webs of a conductor and a dielectric in the formation of an electrical capacitor comprising a generally cylindrical body member having first and second ends, each of said first and second ends having an outer end face, said outer end faces having tooth means thereon, said ends having a dead end bore therein, said bores extending from their respective end face into the winding mandrel body member; and at least one of said end face tooth means thereon adapted to engage a winding means, said bore having a first portion and a second portion; said first portion of said bore being in the shape of a conicalfrustrum with a larger diameter on the outside near the end face and a smaller diameter on the inside near the dead end, said second portion being of a conical configuration and forming said dead end, said tooth means including a plurality of teeth each having a generally flat surface lying in a generally longitudinal plane and a sloping surface adjacent said flat surface; said tooth means being provided on said first and second ends; said sloping surface extending in one direction from each of said flat surfaces of said teeth on said first end, and said sloping surfaces extending from said flat surfaces on said second end in a direction opposite to that of said sloping surfaces of said first end.
Claim 7
Dependent Claim
233 words
A winding mandrel for winding webs of a conductor and a dielectric in the formation of an electrical capacitor comprising a generally cylindrical body member having first and second ends, each of said first and second ends having an outer end face, said outer end faces having tooth means thereon, said ends having a dead end bore therein, said bores extending from their respective end face into the winding mandrel body member; and at least one of said end face tooth means thereon adapted to engage a winding means, said bore having a first portion and a second portion; said first portion of said bore being in the shape of a conicalfrustrum with a larger diameter on the outside near the end face and a smaller diameter on the inside near the dead end, said second portion being of a conical configuration and forming said dead end, said tooth means including a plurality of teeth each having a generally flat surface lying in a generally longitudinal plane and a sloping surface adjacent said flat surface; said tooth means being provided on said first and second ends; said sloping surface extending in one direction from each of said flat surfaces of said teeth on said first end, and said sloping surfaces extending from said flat surfaces on said second end in a direction opposite to that of said sloping surfaces of said first end.
Claim 8
Dependent Claim
34 words
A winding mandrel according to claim 5 wherein said body member consists of an electric insulating material and said mandrel length is less than the width of the said webs of material wound thereon.
Claim 9
Dependent Claim
29 words
A winding mandrel according to claim 5 wherein each of said sloping surfaces intersects a narrow, generally planar surface extending generally transverse to the axis of said body member.
Claim 10
Dependent Claim
25 words
A winding mandrel according to claim 5 wherein a plurality of mandrel lengths are provided, each of said different mandrel lengths having a different color.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |