Patent US3643035A successfully refreshed from Google Patents.
US3643035A
Expired / Lapsed
US
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Multichannel magnetic head having a common ground terminal coupled to a piece of magnetic material on the face of the head
Assignee: Pioneer Corp
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Filing: 1969-09-17
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Granted: 1972-02-15
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Expires: 1989-09-17
Abstract
Abstract A magnetic head having a sheet of magnetic material deposited or adhered with an insulating film directly to a sheet of conductive material and indirectly through a conductive film to a sheet of nonconductive material; a plurality of electromagnetic converting films provided on said insulating film; current, voltage and ground terminals formed on said electromagnetic converting films by ohmic connection of conductive material, said ground terminal being connected by said magnetic material or said conductive film at the side of sliding contact with a magnetic tape; and a magnetic substance having an insulating portion, at least at the surface thereof, connected independently of each other to each of said electromagnetic converting films. This magnetic head is manufactured by a method having the steps of depositing or adhering a plurality of electromagnetic converting films on a sheet of magnetic material, connecting a magnetic substance independently of each other on said respective electromagnetic converting films for supporting said electromagnetic converting films therebetween.
Inventors
- 👤 Tsunehiro Tsukagoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:53
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G11B5/332; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A plural track magnetic head having a face for contacting a magnetic tape and comprising: a. a first piece of magnetic material; b. an insulating film covering a portion of said first piece of magnetic material; c. a plurality of electromagnetic converting means for converting between magnetic signals and electrical signals and affixed to said insulating film wherein each of said electromagnetic converting means corresponds to one of said tracks; d. a plurality of second pieces of magnetic material having an insulating layer on a surface thereof, each of said second pieces of magnetic material being affixed to a different one of said electromagnetic converting means; and e. control current terminals, output terminals and ground terminals on each of said electromagnetic converting means, all of said ground terminals being coupled in common to said first piece of magnetic material on the face of said head and each of said output terminals corresponding to one of said tracks.
Claim 2
Dependent Claim
157 words
A plural track magnetic head having a face for contacting a magnetic tape and comprising: a. a first piece of magnetic material; b. an insulating film covering a portion of said first piece of magnetic material; c. a plurality of electromagnetic converting means for converting between magnetic signals and electrical signals and affixed to said insulating film wherein each of said electromagnetic converting means corresponds to one of said tracks; d. a plurality of second pieces of magnetic material having an insulating layer on a surface thereof, each of said second pieces of magnetic material being affixed to a different one of said electromagnetic converting means; and e. control current terminals, output terminals and ground terminals on each of said electromagnetic converting means, all of said ground terminals being coupled in common to said first piece of magnetic material on the face of said head and each of said output terminals corresponding to one of said tracks.
Claim 3
Dependent Claim
45 words
A magnetic head as set forth in claim 1 further including short-circuiting means for coupling the control current terminals of each electromagnetic converting means to the control current terminals of the adjacent electromagnetic converting means for providing a short circuit between adjacent electromagnetic converting means.
Claim 4
Dependent Claim
22 words
A magnetic head as set forth in claim 1 wherein said electromagnetic converting means is recessed from said face of said head.
Claim 5
Dependent Claim
72 words
A magnetic head as set forth in claim 3 wherein: said first piece of magnetic material supports said electromagnetic converting means and is conductive; said insulating layer is between said electromagnetic converting means and said second piece of magnetic material; and wherein said electromagnetic converting means is connected to said first piece of magnetic material at a point adjacent to the magnetic tape so that said piece of magnetic material is grounded.
Claim 6
Dependent Claim
58 words
A magnetic head as set forth in claim 3 wherein said first piece of magnetic material supports said electromagnetic converting means and is nonconductive, and wherein said electromagnetic converting means is connected to a conductive film on said first piece of magnetic material at a position adjacent to the magnetic tape and wherein said conductive film is grounded.
Claim 7
Dependent Claim
26 words
A magnetic head as set forth in claim 3 wherein one of said terminals of said electromagnetic converting means is positioned adjacent to the magnetic tape.
Claim 8
Dependent Claim
25 words
A magnetic head as set forth in claim 6 wherein the ground terminal of said electromagnetic converting means is positioned adjacent to the magnetic tape.
Claim 9
Independent Claim
123 words
A method of manufacturing a plural track magnetic head on a first piece of material having a high magnetic permeability comprising the steps of: a. affixing an insulating layer to said first piece of material; b. depositing a plurality of Hall elements on said insulating layer and said first piece of material such that said Hall elements have a common ground terminal on said first piece of material each of said Hall elements corresponding to one of said tracks; c. affixing a second piece of magnetic material over said Hall elements such that said Hall elements are supported between said first piece and said second piece of material; and d. affixing control current terminals and output terminals on each of said Hall elements.
Claim 10
Independent Claim
123 words
A method of manufacturing a plural track magnetic head on a first piece of material having a high magnetic permeability comprising the steps of: a. affixing an insulating layer to said first piece of material; b. depositing a plurality of Hall elements on said insulating layer and said first piece of material such that said Hall elements have a common ground terminal on said first piece of material each of said Hall elements corresponding to one of said tracks; c. affixing a second piece of magnetic material over said Hall elements such that said Hall elements are supported between said first piece and said second piece of material; and d. affixing control current terminals and output terminals on each of said Hall elements.
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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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |