US3593326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head mounting with plural gimbals
Assignee: Fujitsu Services Ltd
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Filing: 1969-07-07
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Granted: 1971-07-13
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Expires: 1989-07-07
Abstract
Abstract A gimbal mounting for a magnetic head is disclosed which is constructed of a sheet of resilient material which has apertures therein defining a first gimbal supporting an intermediate area within an outer area of the sheet and further apertures defining a second gimbal supporting an inner area of the sheet within the intermediate area. The outer area is secured to a support member and a magnetic head is secured to the inner area. The intermediate area also carries a pair of skids, or alternatively a pair of further gimballed inner areas to which magnetic heads are secured. The skids and head, or the three heads form, in cooperation with a record surface form, a three-point suspension for the intermediate area. The first gimbal ensures that the three-point suspension is able to follow relatively slow surface changes of the record whilst the second gimbal supporting the inner area permits the head to be closely in contact with the record surface in spite of relatively rapid surface changes.
Inventors
- 👤 Ian Turner
- 👤 Peter George Jackaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/488; G11B5/4886; G11B5/58
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A magnetic head mounting including a sheet of resilient material on which a first gimbal arrangement is formed around a second gimbal arrangement, said resilient material having apertures therein defining outer, intermediate and inner areas of the material, said intermediate area being within said outer area and said inner area being within said intermediate area, said inner area being effective to carry a magnetic head mounted directly therein, a first portion of said material forming a first mounting ring between said outer and intermediate areas, first bridging portions of said resilient material connecting said first mounting ring to both said outer and intermediate areas, a second portion of said resilient material forming a second mounting ring between said inner and intermediate areas, and second bridging portions of said material connecting said second mounting ring to both said inner and intermediate areas such that said first mounting ring and first bridging portions form said first gimbal arrangement and said second mounting ring and said second bridging portions form said second gimbal arrangement.
Claim 2
Dependent Claim
171 words
A magnetic head mounting including a sheet of resilient material on which a first gimbal arrangement is formed around a second gimbal arrangement, said resilient material having apertures therein defining outer, intermediate and inner areas of the material, said intermediate area being within said outer area and said inner area being within said intermediate area, said inner area being effective to carry a magnetic head mounted directly therein, a first portion of said material forming a first mounting ring between said outer and intermediate areas, first bridging portions of said resilient material connecting said first mounting ring to both said outer and intermediate areas, a second portion of said resilient material forming a second mounting ring between said inner and intermediate areas, and second bridging portions of said material connecting said second mounting ring to both said inner and intermediate areas such that said first mounting ring and first bridging portions form said first gimbal arrangement and said second mounting ring and said second bridging portions form said second gimbal arrangement.
Claim 3
Dependent Claim
73 words
A mounting as claimed in claim 1 in which said sheet of resilient material has further apertures to define a plurality of inner areas; a like plurality of second mounting rings each extending around a different one of the inner areas respectively and further second bridging portions of said resilient material connecting said second mounting rings to both said inner areas and said intermediate areas to form a plurality of second gimbal arrangements.
Claim 4
Dependent Claim
22 words
A mounting as claimed in claim 1 in which the center of said inner area is eccentrically positioned within said intermediate area.
Claim 5
Dependent Claim
49 words
A mounting as claimed in claim 1 in which said first gimbal arrangement allows the head to follow slow variations in the surface of the magnetic recording medium and the second gimbal arrangement allows said magnetic head to follow rapid variations in the surface of said magnetic recording medium.
Claim 6
Dependent Claim
54 words
A mounting as claimed in claim 1 and further including a magnetic head, a support member secured to the outer area of said resilient material and spring means carried by said support member effective to apply pressure perpendicular to the plane of the resilient material to said magnetic head carried by said inner area.
Claim 7
Dependent Claim
53 words
A mounting as claimed in claim 5 in which the spring means includes a further sheet of resilient material having apertures to define an outer portion and an inner portion and a pair of spiral members connecting the inner portion to the outer portion, the outer portion being mounted on said support member.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |