Patent US3605055A successfully refreshed from Google Patents.
US3605055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-piece winding bobbin for watt-hour meter potential coil
Assignee: General Electric Co
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Filing: 1970-07-02
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Granted: 1971-09-14
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Expires: 1990-07-02
Abstract
Abstract A winding bobbin for a watt-hour potential coil is formed of two flanged spools that are fitted together to make a unitary bobbin assembly. The two-piece bobbin arrangement is characterized by incorporating an insulated chamber between the adjacent spools when they are in their assembled position, thereby to afford an insulated passageway for connecting the respective electromagnetic coils wound on the two spools in a manner such that the voltage gradient between successive end turns of wire on each coil is reduced to approximately 50 percent of the end-turn gradient that would exist on a single-coil bobbin having an equal number of turns on its supported coil.
Inventors
- 👤 James J Grady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:23
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/325; G; G01; G01R; G01R11/00; G01R11/02; H01F5/00; H01F5/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
267 words
A transformer winding bobbin comprising: a. a first spool having an elongated central core portion with a pair of flanges extending radially outward therefrom, said flanges being mounted in fixed relation respectively adjacent opposite ends of said core portion, b. a second spool having an elongated central core portion with a pair of flanges extending radially outward therefrom, said flanges being mounted in fixed relation respectively adjacent opposite ends of said core portion, c. spool-holding means holding first and second spool in a predetermined position with their respective longitudinal axes generally in alignment and with one end of the first spool in contact with one end of the second spool, d. means defining an aperture in the flange of said first spool nearest the second spool and means defining an aperture in the flange of said second spool nearest the first spool, said apertures in said flanges affording a passageway through the flanges, e. wall means defining a chamber and contacting each of the apertured flanges of said first and second spools, said chamber being substantially closed except for the access thereto afforded by the passageways through said flanges, whereby a continuous substantially closed passageway is formed from the central core portion of the first spool through the passageway in the apertured flanges and the chamber to the central core portion of the second spool. , 2 A transformer winding bobbin as defined in claim 1 wherein said first and second spools are formed of a moldable thermal plastic electrical insulating material, and said flanges are integrally molded with the core portion on which they are mounted.
Claim 2
Dependent Claim
107 words
A transformer winding bobbin as defined in claim 1 wherein said spool-holding means comprises means defining a recess in one end of the core portion of the first spool, and means forming an abutment on one end of the core portion of the second Spool, said abutment being adapted to extend into said recess inclose, sliding engagement therewith whereby the engagement between said recess and the abutment effectively prevents relative angular movement between said first and second spools, and provides a long tortuous electrical creep path between an uninsulated junction of windings on said spools and a conductive member mounted within the core portion of said spools.
Claim 3
Dependent Claim
46 words
A transformer winding bobbin as defined in claim 3 wherein said means defining a recess comprises a plurality of generally flat walls disposed respectively in planes that substantially parallel juxtaposed surfaces of the central portion of said first spool located between the pair of flanges thereon.
Claim 4
Dependent Claim
35 words
A transformer winding bobbin as defined in claim 1 wherein said wall means comprises a wall member mounted on the side of one of said apertured flanges that is closest to the other apertured flange.
Claim 5
Dependent Claim
27 words
A transformer winding bobbin as defined in claim 5 wherein said wall member is mounted closely adjacent the periphery of at least one of said apertured flanges.
Claim 6
Dependent Claim
24 words
A transformer winding bobbin as defined in claim 5 wherein said wall member is integrally formed with the flange on which it is mounted.
Claim 7
Dependent Claim
52 words
A transformer winding bobbin as defined in claim 1 wherein each aperture in the respective flanges of both said first and second spools is in the form of a slot extending from the outer edge of the flange in which it is positioned to a point adjacent the base of said flange.
Claim 8
Dependent Claim
27 words
An invention as defined in claim 8 in which the longitudinal axes of said slots extend radially outward from the respective central core portions of said spools.
Claim 9
Dependent Claim
39 words
An invention as defined in claim 8 wherein the slot in the flange on the first spool is angularly displaced from the slot in the flange on the second spool with respect to the longitudinal axes of said spools.
Claim 10
Dependent Claim
101 words
An invention as defined in claim 10 wherein said wall means comprises a wall member mounted on the side on one of said apertured flanges closet to the other apertured flange, said wall member being arranged to form a wall adjacent the periphery of the flange on which it is mounted around substantially its entire periphery except for the area thereof removed by the slot therein, and wherein said angular displacement of the slots in said flanges is sufficient to cause a portion of the top of said wall member to abut the slot in the flange of the other spool.
Claim 11
Dependent Claim
61 words
An invention ad defined in claim 1 including a first coil of insulated wire wound on the first spool, and including a second coil of insulated wire wound on said second spool, said first and second coils of wire both having first ends respectively that are positioned in current-carrying contact with each other, whereby said coils form a single continuous winding.
Claim 12
Dependent Claim
50 words
An invention as defined in claim 12 wherein said first ends of the coils are both positioned adjacent the central core portion of their respective spools, and said coils are wound so they develop aiding magnetic fields in said core portions when an electric current is passed through the winding.
Claim 13
Dependent Claim
76 words
An invention as defined in claim 13 wherein both unapertured flanges respectively are provided with contact-supporting means mounted adjacent the respective peripheral edges thereof, and including a pair of metal contacts mounted respectively on said contact-supporting means, said contacts being electrically connected respectively to the second ends of said coils, thereby to form a complete electrical circuit from one of said contracts, through both of said coils and the junction between them to the other contact.
Claim 14
Dependent Claim
63 words
An invention as defined in claim 12 wherein the central core portion of each of said spools is hollow to form a continuous passageway through said core portions when the spools are in said predetermined position, said continuous passageway being adapted to receive therein a magnetic metal core that is effective to concentrate said magnetic fields within The core portions of said spools.
Claim 15
Dependent Claim
34 words
An invention as defined in claim 14 wherein the respective second ends of said coils are positioned adjacent the outer peripheral edges of the unapertured flanges when said coils are coupled in operating position.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |