US3787638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hall element magnetic head having integral means for detecting the amount of head material ground away during a machine operation
Assignee: Pioneer Corp
•
Filing: 1972-04-25
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Granted: 1974-01-22
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Expires: 1992-04-25
Abstract
Abstract A magnetic head having one or more magneto-electric converting elements, for example, a Hall element, comprises one or more leads which are used, when the magnetic head is manufactured, for measuring the amount of head material ground away from between a front surface of the magnetic head and the front edge of the magneto-electric converting element.
Inventors
- 👤 M Murai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G11B5/187; G11B5/1871; G11B5/332; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49037; Y10T29/49055
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A magnetic head for use with a magnetic recording medium comprising: at least one substrate, one or more magneto-electric converting element means vapor deposited onto the substrate, necessary leads vapor deposited on said substrate and connected to said element means, and detector means including detector leads vapor deposited on said substrate for measuring the position of said element means relative to the operative surface of said substrate which contacts the magnetic recording medium.
Claim 2
Dependent Claim
73 words
A magnetic head for use with a magnetic recording medium comprising: at least one substrate, one or more magneto-electric converting element means vapor deposited onto the substrate, necessary leads vapor deposited on said substrate and connected to said element means, and detector means including detector leads vapor deposited on said substrate for measuring the position of said element means relative to the operative surface of said substrate which contacts the magnetic recording medium.
Claim 3
Dependent Claim
21 words
A magnetic head as defined in claim 1 wherein said detector leads and said necessary leads are of the same material.
Claim 4
Dependent Claim
29 words
A magnetic head as defined in claim 1 wherein said detector leads are made of relatively high resistance material and the remaining leads are made of highly conductive material.
Claim 5
Dependent Claim
23 words
A magnetic head as defined in claim 1 wherein at least one of said detector leads is also connected to said element means.
Claim 6
Dependent Claim
37 words
A magnetic head as defined in claim 1 wherein at least one of said detector leads and one of said necessary leads are electrically connected together such that removal of the substrate material interrupts the connection therebetween.
Claim 7
Dependent Claim
18 words
A magnetic head as defined in claim 1 wherein said magnetoelectric converting element means is a Hall element.
Claim 8
Dependent Claim
23 words
A magnetic head as set forth in claim 1 wherein said at least one substrate is made of a highly permeable magnetic material.
Claim 9
Dependent Claim
55 words
A magnetic head as defined in claim 7 wherein said magnetic head comprises two detector leads, and wherein said magneto-electric converting means comprises two Hall elements, each of said detector leads being connected in an electric circuit with the corresponding Hall elements, whereby removal of the substrate material interrupts either or both of the connections.
References Cited (Backward Citations)
US3495049A
Cited
US3643035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |