Patent US4257027A successfully refreshed from Google Patents.
US4257027A
Expired / Lapsed
US
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Transformer bobbin assembly
Assignee: SHIMODA ELECTRIC Co
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Filing: 1979-05-21
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Granted: 1981-03-17
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Expires: 1999-05-21
Abstract
Abstract A transformer bobbin assembly comprising in combination an outer frame bobbin having outer frame flanges integrally secured thereto at both axial ends of an inner drum thereof, on which a primary coil is arranged, an inner frame bobbin having inner frame flanges integrally secured thereto at both axial ends of an outer drum thereof, on which a secondary coil is arranged, said outer drum of said inner frame bobbin being located in coaxial alignment with the inner drum of the outer frame bobbin so that the inner frame bobbin is mounted over the outer frame bobbin so as to surround the same. Protection covers are secured to the outer frame bobbin to cover the primary and secondary coils as well as the connected portions of the lead wires thereof to the outside circuit. In a modified embodiment of the transformer bobbin assembly the inner frame bobbin is constructed of two bobbin segments which have a U shaped configuration, said bobbin segments being adapted to be displaced toward each other so as to be joined together to build an inner frame bobbin and thus surround the outer frame bobbin between the bobbin segments.
Inventors
- 👤 Saburo Yasuhisa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:20
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/29; H01F27/30; H01F27/306; H01F5/00; H01F5/04; H01F2005/043
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
238 words
A transformer bobbin assembly comprising: an outer frame bobbin having an inner drum on which a primary coil is arranged and outer frame flanges formed integrally with the inner drum at both ends of the inner drum, said outer frame flanges having guide slots or grooves through which the lead wires of primary and secondary coils are extended axially of said outer bobbin, at least one of said outer frame flanges having pin holes into which connecting pins are inserted to interconnect said primary and secondary coils with an outside circuit, said slots or grooves and said pin holes being located in a closely spaced relation, an inner frame bobbin having an outer drum on which a secondary coil is arranged and inner frame flanges formed integrally with the outer drum at both ends of the outer drum, said inner frame flanges having guide grooves through which lead wires of the secondary coil are extended axially of said inner bobbin, said outer drum of the inner frame bobbin being located in coaxial alignment with the inner drum of the outer frame bobbin so that the outer drum surrounds the inner drum, said inner frame flanges being positioned at the inside of the outer frame flanges, and protection covers attached to the outside of the at least one outer frame flange to cover connected portions of the lead wires of said primary and secondary coils to the outside circuit.
Claim 2
Dependent Claim
238 words
A transformer bobbin assembly comprising: an outer frame bobbin having an inner drum on which a primary coil is arranged and outer frame flanges formed integrally with the inner drum at both ends of the inner drum, said outer frame flanges having guide slots or grooves through which the lead wires of primary and secondary coils are extended axially of said outer bobbin, at least one of said outer frame flanges having pin holes into which connecting pins are inserted to interconnect said primary and secondary coils with an outside circuit, said slots or grooves and said pin holes being located in a closely spaced relation, an inner frame bobbin having an outer drum on which a secondary coil is arranged and inner frame flanges formed integrally with the outer drum at both ends of the outer drum, said inner frame flanges having guide grooves through which lead wires of the secondary coil are extended axially of said inner bobbin, said outer drum of the inner frame bobbin being located in coaxial alignment with the inner drum of the outer frame bobbin so that the outer drum surrounds the inner drum, said inner frame flanges being positioned at the inside of the outer frame flanges, and protection covers attached to the outside of the at least one outer frame flange to cover connected portions of the lead wires of said primary and secondary coils to the outside circuit.
Claim 3
Dependent Claim
61 words
A transformer bobbin assembly as set forth in claim 1, wherein the inner frame bobbin is made of flexible material and slit over the whole axial length thereof to be restorably expanded outwards so that the inner drum of the outer frame bobbin is inserted in the enlarged opening of the inner frame bobbin, which is caused by the aforesaid expansion.
Claim 4
Dependent Claim
39 words
A transformer bobbin assembly as set forth in claim 1, wherein the outer and inner frame bobbins are engaged to each other by means of engagement portions which are formed in place on said outer and inner frame bobbins.
Claim 5
Dependent Claim
41 words
A transformer bobbin assembly as set forth in claim 1, wherein the protection covers are formed with guide slots through which the lead wires of the outside circuit are extended to make a connection to the respective primary and secondary coils.
Claim 6
Dependent Claim
54 words
A transformer bobbin assembly as set forth in claim 1, wherein the inner frame bobbin is composed of two bobbin segments which have a U shaped configuration, said bobbin segments being displaced toward each other so as to be joined together to build an inner frame bobbin and surround the outer frame bobbin therebetween.
Claim 7
Dependent Claim
40 words
A transformer bobbin assembly as set forth in claim 5, wherein the bobbin segments are provided with engagement protrusions respectively, each of which is formed with a guide groove through which the lead wires of the secondary coil are extended.
References Cited (Backward Citations)
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |