US3737992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing multiple track, dual gap magnetic heads
Assignee: Magnetic Head Corp
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Filing: 1972-06-09
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Granted: 1973-06-12
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Expires: 1992-06-09
Abstract
Abstract Three sub-assemblies, consisting of an elongate center section having elongate, compound core members assembled with opposite sides thereof and a pair of elongate housing sections having elongate, compound core members assembled therewith, are joined with the housing assemblies sandwiching the center section assembly therebetween with an opposite end portion of each elongate core member of the center section assembly forming a magnetic circuit, including an air gap, with a corresponding end portion of an elongate core member assembled with one of the housing sections. Separation of the joined sub-assemblies substantially perpendicular to the longitudinal axes thereof at a position intermediate the opposite end portions of the elongate, compound core members results in the formation of two complete, dual gap head assemblies.
Inventors
- 👤 R Braun
- 👤 L Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041; Y10T29/49055
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A method of manufacturing multiple track, dual gap magnetic heads, comprising; providing first and second pluralities of elongate, magnetic core members, each having core portions spaced along the longitudinal axes thereof; providing a winding on each of said spaced core portions; providing third and fourth pluralities of elongate, magnetic core members, each, having core portions spaced along the longitudinal axes thereof; assembling a like number of said first and second plurality of core members with first and second elongate housings, respectively; assembling a like number of said third and fourth plurality of core members with opposite sides, respectively, of an elongate center section; joining the housing assemblies in face-to-face engagement with said opposite sides of said center section with each of the spaced core portions of each housing assembly defining individual magnetic circuits, including transducing gaps, with spaced core portions of the center section assembly; and dividing the joined housing and center section assemblies at a position intermediate the spaced core portions of the assembled core members to produce two dual gap magnetic heads.
Claim 2
Independent Claim
174 words
A method of manufacturing multiple track, dual gap magnetic heads, comprising; providing first and second pluralities of elongate, magnetic core members, each having core portions spaced along the longitudinal axes thereof; providing a winding on each of said spaced core portions; providing third and fourth pluralities of elongate, magnetic core members, each, having core portions spaced along the longitudinal axes thereof; assembling a like number of said first and second plurality of core members with first and second elongate housings, respectively; assembling a like number of said third and fourth plurality of core members with opposite sides, respectively, of an elongate center section; joining the housing assemblies in face-to-face engagement with said opposite sides of said center section with each of the spaced core portions of each housing assembly defining individual magnetic circuits, including transducing gaps, with spaced core portions of the center section assembly; and dividing the joined housing and center section assemblies at a position intermediate the spaced core portions of the assembled core members to produce two dual gap magnetic heads.
Claim 3
Independent Claim
167 words
A method of manufacturing multiple track, dual gap magnetic heads, comprising; providing first and second pluralities of elongate, magnetic core members, each having core portions spaced along the longitudinal axes thereof; providing third and fourth pluralities of elongate, magnetic core members, each, having core portions spaced along the longitudinal axes thereof; assembling a like number of said first and second pluralities of core members with first and second elongate housings, respectively; assembling a like number of said third and fourth pluralities of core members with oPposite sides, respectively, of an elongate center section; joining the housing assemblies in face-to-face engagement with said opposite sides of said center section whereby each of the spaced core portions of each housing assembly defines an individual magnetic circuit, including a transducing gap, with a spaced core portion of the center section assembly; and dividing the joined housing and center section assemblies at a position intermediate the spaced core portions of the assembled core members to produce two dual gap magnetic heads.
Claim 4
Independent Claim
167 words
A method of manufacturing multiple track, dual gap magnetic heads, comprising; providing first and second pluralities of elongate, magnetic core members, each having core portions spaced along the longitudinal axes thereof; providing third and fourth pluralities of elongate, magnetic core members, each, having core portions spaced along the longitudinal axes thereof; assembling a like number of said first and second pluralities of core members with first and second elongate housings, respectively; assembling a like number of said third and fourth pluralities of core members with oPposite sides, respectively, of an elongate center section; joining the housing assemblies in face-to-face engagement with said opposite sides of said center section whereby each of the spaced core portions of each housing assembly defines an individual magnetic circuit, including a transducing gap, with a spaced core portion of the center section assembly; and dividing the joined housing and center section assemblies at a position intermediate the spaced core portions of the assembled core members to produce two dual gap magnetic heads.
Claim 5
Dependent Claim
30 words
The method of claim 2 including the prior step of machining core member receiving recesses in opposite sides of said elongate center section and in each of said elongate housings.
Claim 6
Dependent Claim
25 words
The method of claim 3 including the step of machining greater width core member receiving recesses in one of said housing than in the other.
Claim 7
Dependent Claim
22 words
The method of claim 4 wherein the core member receiving recesses in each said elongate housing is machined in a single pass.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |