Patent US3586891A successfully refreshed from Google Patents.
US3586891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording disc drive
Assignee: Memorex Corp
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Filing: 1970-02-26
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Granted: 1971-06-22
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Expires: 1990-02-26
Abstract
Abstract An apparatus for linear positioning of magnetic recording heads in a disc-type recording machine containing a linear positioning motor which converts an electrical address signal directly into linear motion, a rack and pawl mechanism for locking the recording heads at predetermined locations over the recording surface, a stationary cam cooperating with a loading ramp on a head access arm for direct head loading and unloading as the access arm is moved radially of the disc, and a recording head suspension which permits the heads to be loaded at the peripheral, high speed area of the disc rather than the central low speed area, while eliminating the need for control of tolerances during assembly of the apparatus.
Inventors
- 👤 Roy A Applequist
- 👤 Laurence M Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:41
CPC Classifications
H; H01; H01R; H01R35/00; H01R35/02; G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4826; G11B5/54; G11B5/55; G11B5/5521; G11B5/5526; G11B5/553; G11B5/5547; G11B5/5552; G11B5/5556; G11B5/58; G11B5/60; H02; H02K; H02K41/00; H02K41/02; H02K41/035; H02K41/0352; H02K41/0354; H02K41/0356; H02P; H02P25/00; H02P25/02; H02P25/032; H02P25/034
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
161 words
A drive motor for the linear positioning of a magnetic recording head, having a stationary permanent magnet and a movable wire-wound armature that evaporated with the permanent magnet to produce a relative linear motion between magnet and armature when the armature is supplied with an electrical current, a stationary junction mount mounted in fixed position with respect to said magnet, a movable junction mount on said armature electrically connected thereto, and a flexible bus connector for electrically connecting said stationary and movable junction mounts comprising a thin, flat, elongated strip of high resiliency with an electrical conductor running longitudinally from end to end and with a curved cross section substantially defining an arc, said strip fixed at one end to said stationary junction mount and fixed at the other end to said movable junction mount with the end portions of said strip parallel and pointing in substantially identical directions and in the direction of relative movement of said magnet anD armature.
Claim 2
Dependent Claim
161 words
A drive motor for the linear positioning of a magnetic recording head, having a stationary permanent magnet and a movable wire-wound armature that evaporated with the permanent magnet to produce a relative linear motion between magnet and armature when the armature is supplied with an electrical current, a stationary junction mount mounted in fixed position with respect to said magnet, a movable junction mount on said armature electrically connected thereto, and a flexible bus connector for electrically connecting said stationary and movable junction mounts comprising a thin, flat, elongated strip of high resiliency with an electrical conductor running longitudinally from end to end and with a curved cross section substantially defining an arc, said strip fixed at one end to said stationary junction mount and fixed at the other end to said movable junction mount with the end portions of said strip parallel and pointing in substantially identical directions and in the direction of relative movement of said magnet anD armature.
Claim 3
Dependent Claim
20 words
The flexible bus connector of claim 1 further characterized by the strip being comprised of a metallic, electrically conductive material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |