Patent US4012783A successfully refreshed from Google Patents.
US4012783A
Expired / Lapsed
US
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Magnetic head
Assignee: Olympus Corp
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Filing: 1976-01-14
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Granted: 1977-03-15
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Expires: 1996-01-14
Abstract
Abstract A magnetic head comprises a pair of core pieces with a spacer interposed therebetween which defines a gap, a yoke which interconnects the ends of the both core pieces located remote from the gap, a bobbin into which the both core pieces and the yoke are fitted to maintain them joined together, and a coil wound around the bobbin. The head is manufactured by the steps of joining together a pair of core pieces with an interposed spacer which defines a gap, applying an adhesive to the mating ends of the both core pieces and the yoke, and fitting the core pieces and the yoke into the bobbin.
Inventors
- 👤 Naohiro Hanaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; G11B5/1272; G11B5/17
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A magnetic head comprising a pair of core pieces having a spacer interposed therebetween to define a gap, a yoke interconnecting the ends of the core pieces which are remote from the gap, a bobbin having a pair of flanges at its opposite ends which are adapted to maintain portions of the core pieces and the yoke which are to be bonded together in abutting engagement when they are engaged with the flanges, and a coil disposed on the bobbin intermediate the flanges.
Claim 2
Dependent Claim
83 words
A magnetic head comprising a pair of core pieces having a spacer interposed therebetween to define a gap, a yoke interconnecting the ends of the core pieces which are remote from the gap, a bobbin having a pair of flanges at its opposite ends which are adapted to maintain portions of the core pieces and the yoke which are to be bonded together in abutting engagement when they are engaged with the flanges, and a coil disposed on the bobbin intermediate the flanges.
Claim 3
Dependent Claim
67 words
A magnetic head according to claim 1 in which the bobbin is formed with a bore for receiving the yoke which extends through the length of the bobbin and the both flanges, each of the flanges being formed with a notch which defines a core piece receiving opening and a pair of jaws located on the opposite sides of the opening for holding the core piece therebetween.
Claim 4
Dependent Claim
103 words
A magnetic head comprising a pair of core pieces having a spacer interposed therebetween to define a gap, a yoke having a pair of arms which interconnect the ends of the core pieces located remote from the gap, a pair of bobbins each having a pair of flanges at its opposite ends, the flanges being adapted to maintain portions of the core pieces and the both arms of the yoke which are to be bonded together in abutting engagement when they are fitted into the flanges, and a pair of coils disposed on the respective bobbins intermediate the pair of flanges associated therewith.
Claim 5
Dependent Claim
103 words
A magnetic head comprising a pair of core pieces having a spacer interposed therebetween to define a gap, a yoke having a pair of arms which interconnect the ends of the core pieces located remote from the gap, a pair of bobbins each having a pair of flanges at its opposite ends, the flanges being adapted to maintain portions of the core pieces and the both arms of the yoke which are to be bonded together in abutting engagement when they are fitted into the flanges, and a pair of coils disposed on the respective bobbins intermediate the pair of flanges associated therewith.
Claim 6
Dependent Claim
196 words
A multi-channel magnetic head comprising a plurality of magnetic head sub-assemblies, each of the magnetic head sub-assemblies comprising a pair of core pieces having a spacer interposed therebetween to define a gap, a yoke including a pair of arms which interconnect the ends of the both core pieces located remote from the gap, a pair of bobbins each having a pair of flanges at its opposite ends, the flanges being adapted to maintain portions of the both core pieces and the both arms of the yoke which are to be bonded together in abutting engagement with each other when they are fitted into the flanges, a coil disposed on the both bobbins intermediate the pair of flanges associated therewith, and detent means formed in one of the flanges of the respective bobbins, the plurality of magnetic head sub-assemblies being disposed one above another to form a stack; at least one insulating plate interposed between adjacent magnetic head sub-assemblies; and retention spring means engaged with the detent means formed in those bobbins which are located at the opposite ends of the stack for maintaining the magnetic head sub-assemblies of the stack in abutting engagement with each other.
Claim 7
Dependent Claim
196 words
A multi-channel magnetic head comprising a plurality of magnetic head sub-assemblies, each of the magnetic head sub-assemblies comprising a pair of core pieces having a spacer interposed therebetween to define a gap, a yoke including a pair of arms which interconnect the ends of the both core pieces located remote from the gap, a pair of bobbins each having a pair of flanges at its opposite ends, the flanges being adapted to maintain portions of the both core pieces and the both arms of the yoke which are to be bonded together in abutting engagement with each other when they are fitted into the flanges, a coil disposed on the both bobbins intermediate the pair of flanges associated therewith, and detent means formed in one of the flanges of the respective bobbins, the plurality of magnetic head sub-assemblies being disposed one above another to form a stack; at least one insulating plate interposed between adjacent magnetic head sub-assemblies; and retention spring means engaged with the detent means formed in those bobbins which are located at the opposite ends of the stack for maintaining the magnetic head sub-assemblies of the stack in abutting engagement with each other.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |