US4479156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic disk recorder
Assignee: Mitsubishi Electric Corp
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Filing: 1982-05-05
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Granted: 1984-10-23
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Expires: 2002-05-05
Abstract
Abstract A magnetic disk recorder which applies an azimuth recording system and which can use all of the tracks of a magnetic disk. In particular, a plurality of magnetic head chips, each of which is formed with a head gap having a predetermined azimuth angle, are respectively assembled into separate head sliders along with dummy heads, and the head sliders are driven by separate actuators.
Inventors
- 👤 Munehito Kumagai
- 👤 Shigehisa Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012; G11B5/48; G11B5/488; G11B5/4886; G11B5/56
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
207 words
A magnetic disk recorder comprising: a plurality of magnetic head chips, each of which is formed with a head gap having a predetermined azimuth angle; at least two separate head sliders, each of which having one of said plurality of magnetic head chips assembled thereon; and at least two separate actuators, each of which actuates a respective one of said head sliders by associated connecting means, said azimuth angle of said head gap of one of said plurality of magnetic head chips is defined to be positive in a clockwise direction with respect to a radial line extending from the center of said magnetic disk and wherein said azimuth angle of said head gap of another of said magnetic head chips is defined to be negative in a clockwise direction with respect to said radial line, said magnetic head chips having said positive azimuth angle is assembled on one of said head sliders, while said magnetic head chip having said negative angle is assembled on another of said head sliders, wherein two of said magnetic head chips are arranged at a distance which is equal to a track pitch T p , and said head chips are moved by said actuators at 2·T p steps in succession.
Claim 2
Dependent Claim
207 words
A magnetic disk recorder comprising: a plurality of magnetic head chips, each of which is formed with a head gap having a predetermined azimuth angle; at least two separate head sliders, each of which having one of said plurality of magnetic head chips assembled thereon; and at least two separate actuators, each of which actuates a respective one of said head sliders by associated connecting means, said azimuth angle of said head gap of one of said plurality of magnetic head chips is defined to be positive in a clockwise direction with respect to a radial line extending from the center of said magnetic disk and wherein said azimuth angle of said head gap of another of said magnetic head chips is defined to be negative in a clockwise direction with respect to said radial line, said magnetic head chips having said positive azimuth angle is assembled on one of said head sliders, while said magnetic head chip having said negative angle is assembled on another of said head sliders, wherein two of said magnetic head chips are arranged at a distance which is equal to a track pitch T p , and said head chips are moved by said actuators at 2·T p steps in succession.
Claim 3
Dependent Claim
34 words
A magnetic disk recorder according to claim 1, further comprising at least two dummy heads, each of which is assembled in a respective one of said head sliders along with said magnetic head chips.
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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |