US3867724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head drive apparatus
Assignee: International Business Machines Corp
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Filing: 1973-12-10
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Granted: 1975-02-18
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Expires: 1993-12-10
Abstract
Abstract An apparatus for driving a magnetic head relative to a rotatable recording medium upon rotation thereof. The apparatus has a turntable for accepting the recording medium; a spindle for aligning the recording medium; a tripod for supporting the turntable; a tubular member for aligning the turntable, spindle, and tripod; and a flange connected to the spindle for causing the spindle to be lowered upon the lowering of the turntable. With a recording medium positioned on the turntable and rotated, a leadscrew connected, through a gear arrangement, to the turntable and the magnetic head will cause the magnetic head to be driven relative to the recording medium. When a new recording medium is to be placed on the turntable, the turntable is lowered; causing the tripod to engage the flange and thereby lower the spindle for facilitating removal of the original recording medium.
Inventors
- 👤 James Dudley Bruer
- 👤 Ronald Eugene Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/0284
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
A recording medium spindle assembly comprising: a. turntable means for carrying a recording medium and having an opening extending therethrough perpendicular to the plane of said recording medium; b. spindle means positioned in said opening in said turntable means for aligning said recording medium on said turntable means; c. support means for supporting said turntable means and biasing said turntable means toward said recording medium, said support means having an opening therein through which said spindle means extends; d. aligning means positoned in said opening in said turntable means and said opening in said support means between said turntable means and said spindle means, and said support means and said spindle means for aligning said turntable means, said spindle means, and said support means; e. translation means for causing said turntable means and said support means to be translated away from said recording medium, and permitting said turntable means and said support means to be translated toward said recording medium; and f. means connected to said support means for causing said spindle means to be translated away from said recording medium after said turntable means, and permitting said spindle means to be translated toward and contact said recording medium before said turntable means.
Claim 2
Dependent Claim
203 words
A recording medium spindle assembly comprising: a. turntable means for carrying a recording medium and having an opening extending therethrough perpendicular to the plane of said recording medium; b. spindle means positioned in said opening in said turntable means for aligning said recording medium on said turntable means; c. support means for supporting said turntable means and biasing said turntable means toward said recording medium, said support means having an opening therein through which said spindle means extends; d. aligning means positoned in said opening in said turntable means and said opening in said support means between said turntable means and said spindle means, and said support means and said spindle means for aligning said turntable means, said spindle means, and said support means; e. translation means for causing said turntable means and said support means to be translated away from said recording medium, and permitting said turntable means and said support means to be translated toward said recording medium; and f. means connected to said support means for causing said spindle means to be translated away from said recording medium after said turntable means, and permitting said spindle means to be translated toward and contact said recording medium before said turntable means.
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1 including a cap means for maintaining said recording medium in contact with said turntable means.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 2 including means connected to said turntable means for engagement by said translation means for translating said turntable means.
Claim 5
Dependent Claim
19 words
An aPparatus according to claim 3 including a biasing means for biasing said spindle means toward said recording medium.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 4 including a base means for supporting said aligning means.
Claim 7
Dependent Claim
24 words
An apparatus according to claim 5 including flange means connected to said spindle means for engagement by said means connected to said support means.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |