Patent US4306258A successfully refreshed from Google Patents.
US4306258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head supporting mechanism of double side type flexible disc drive apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1979-06-14
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Granted: 1981-12-15
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Expires: 1999-06-14
Abstract
Abstract A magnetic head supporting mechanism equipped with a magnetic head positioning carriage of a interchangeable double side type flexible disc drive apparatus comprising a carriage having a pair of arms which is rotated in detachable to a double side type flexible disc and arms, and arm parts in the arms and sliding type magnetic heads which are respectively mounted on the arm part and slide on the surface of the flexible disc and gimbal spring placed between each sliding type magnetic head and each arm part.
Inventors
- 👤 Noboru Higashiyama
- 👤 Shin Isozaki
- 👤 Kanji Sakurai
- 👤 Masaru Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:26
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
In an interchangeable double side type flexible disc drive apparatus, wherein a pair of magnetic heads are supported on a magnetic head supporting mechanism fitted to a magnetic head positioning carriage, adapted for positioning of the magnetic heads on the opposite surfaces of a flexible magnetic disc, an improved magnetic head supporting mechanism comprising: first and second support arms; first and second magnetic head assemblies mounted on said first and second support arms respectively and each having at least one contacting type head slider for making flexible sliding contact with a respective surface of said flexible disc, each slider movable at least in a direction normal to said disc; both of said support arms rotatable about said carriage to be detachably removed from said flexible disc; each of said head assemblies including projected two rigid bases of a holder on which is mounted a symetrically shaped cross fulcrum gimbal spring for supporting symmetrical outer parts of said spring, each said spring having symmetrical multigrooves and each said spring coupled on a central circular part thereof to a respective contacting slider for biasing said respective head against a respective surface of said flexible disc.
Claim 2
Dependent Claim
193 words
In an interchangeable double side type flexible disc drive apparatus, wherein a pair of magnetic heads are supported on a magnetic head supporting mechanism fitted to a magnetic head positioning carriage, adapted for positioning of the magnetic heads on the opposite surfaces of a flexible magnetic disc, an improved magnetic head supporting mechanism comprising: first and second support arms; first and second magnetic head assemblies mounted on said first and second support arms respectively and each having at least one contacting type head slider for making flexible sliding contact with a respective surface of said flexible disc, each slider movable at least in a direction normal to said disc; both of said support arms rotatable about said carriage to be detachably removed from said flexible disc; each of said head assemblies including projected two rigid bases of a holder on which is mounted a symetrically shaped cross fulcrum gimbal spring for supporting symmetrical outer parts of said spring, each said spring having symmetrical multigrooves and each said spring coupled on a central circular part thereof to a respective contacting slider for biasing said respective head against a respective surface of said flexible disc.
Claim 3
Dependent Claim
73 words
A magnetic head supporting mechanism according to claim 1, wherein at least one of said head assemblies further includes: a resilient material mounted on said holder and coupled via a fulcrum to the center of the gimbal spring after contact of said spring to said disc; wherein the resilient material provides further biasing of said contacting slider against said surface of said flexible disc only after contact of said head with said disc.
Claim 4
Dependent Claim
21 words
A magnetic head supporting mechanism according to claim 2, wherein said resilient material comprises: a symmetrically shaped cross fulcrum gimbal spring.
Claim 5
Dependent Claim
17 words
A magnetic head supporting mechanism according to claim 3, wherein said resilient material comprises: a cantilever spring.
Claim 6
Dependent Claim
24 words
A magnetic head supporting mechanism according to claims 1 or 2, wherein each support arm and its respective holder are formed as one piece.
Claim 7
Dependent Claim
159 words
In an interchangeable double side type flexible disc drive apparatus, wherein a pair of magnetic heads are supported on a magnetic head supporting mechanism fitted to a magnetic head positioning carriage, adapted for positioning of the magnetic heads on opposite surfaces of a flexible magnetic disc, said disc provided with a jacket, an improved magnetic head supporting mechanism comprising: first and second support arms; first and second magnetic head assemblies mounted on said first and second support arms respectively and each having at least one contacting type head slider for making sliding contact with a respective surface of said flexible disc; each of said head assemblies including a relatively rigid branched holder on which is mounted a spring coupled to a respective contacting slider for biasing said respective contacting slider against the respective surface of said flexible disc; and said holders each including a part for contacting the disc jacket to reduce flutter caused in rotation of the disc.
Claim 8
Dependent Claim
159 words
In an interchangeable double side type flexible disc drive apparatus, wherein a pair of magnetic heads are supported on a magnetic head supporting mechanism fitted to a magnetic head positioning carriage, adapted for positioning of the magnetic heads on opposite surfaces of a flexible magnetic disc, said disc provided with a jacket, an improved magnetic head supporting mechanism comprising: first and second support arms; first and second magnetic head assemblies mounted on said first and second support arms respectively and each having at least one contacting type head slider for making sliding contact with a respective surface of said flexible disc; each of said head assemblies including a relatively rigid branched holder on which is mounted a spring coupled to a respective contacting slider for biasing said respective contacting slider against the respective surface of said flexible disc; and said holders each including a part for contacting the disc jacket to reduce flutter caused in rotation of the disc.
Claim 9
Dependent Claim
20 words
A magnetic head supporting mechanism according to claim 6, wherein said spring comprises: a symmetrically shaped cross fulcrum gimbal spring.
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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |