US4620251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer support structure
Assignee: Seagate Technology LLC
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Filing: 1983-05-13
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Granted: 1986-10-28
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Expires: 2003-05-13
Abstract
Abstract An apparatus for positioning a magnetic transducer member with respect to a magnetic disk has an actuator which is rotated about an axis and includes an arm having a first end secured to the actuator for rotation of the arm about the axis. The arm has an oppositely disposed second end. A load spring member has a first end and a second end and is secured at its first end to the second end of the arm. A gimbal spring is secured to the second end of the load spring member and supports the transducer member. The gimbal spring permits the transducer member to move vertically and to pitch and roll as it flies over the rotating surface of the magnetic disk. The arm, load spring member, and gimbal spring are symmetrical with respect to a straight line running from the axis of rotation of the actuator to the center of the transducer. The transducer member is a two ski head and has a magnetic read/write core secured to the trailing edge of one of the skis. The center line of the core gap is substantially parallel to the trailing edge of the ski.
Inventors
- 👤 Louis G. Gitzendanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:31
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4833; G11B5/4826
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
192 words
In a magnetic recording system including an apparatus for supporting and selectively positioning a transducer having a surface for flying and a center therein, with respect to a rotatable magnetic disk medium, the improvement comprising: an actuator selectively rotatable about an axis; a substantially straight arm rigidly secured to said actuator at a first end of said arm whereby said arm rotates about said axis with said actuator; a load spring having a first end secured to a second end of said arm; and a gimbal spring secured to a second end of said load spring, said gimbal spring supporting the transducer with its flying surface adjacent to the recording surface of the magnetic disk medium for reading and/or writing information at locations on said recording surface selected in accordance with rotational movement of said medium and rotation of said actuator; said arm, transducer flying surface, load spring and gimbal spring being symmetrical about a first line from said axis to the center of said transducer flying surface; said arm and load spring with said line all extending substantially in the direction of said relative medium movement adjacent the transducer flying surface.
Claim 2
Dependent Claim
192 words
In a magnetic recording system including an apparatus for supporting and selectively positioning a transducer having a surface for flying and a center therein, with respect to a rotatable magnetic disk medium, the improvement comprising: an actuator selectively rotatable about an axis; a substantially straight arm rigidly secured to said actuator at a first end of said arm whereby said arm rotates about said axis with said actuator; a load spring having a first end secured to a second end of said arm; and a gimbal spring secured to a second end of said load spring, said gimbal spring supporting the transducer with its flying surface adjacent to the recording surface of the magnetic disk medium for reading and/or writing information at locations on said recording surface selected in accordance with rotational movement of said medium and rotation of said actuator; said arm, transducer flying surface, load spring and gimbal spring being symmetrical about a first line from said axis to the center of said transducer flying surface; said arm and load spring with said line all extending substantially in the direction of said relative medium movement adjacent the transducer flying surface.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 including a magnetic core secured to said transducer and having a gap with a center line substantially perpendicular to said first line.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein said load spring biases said gimbal spring and said transducer towards said recording surface of said disk.
Claim 5
Dependent Claim
117 words
The apparatus of claim 1 wherein said load spring includes a deflected portion and a base portion, said base portion being secured to said second end of said arm and being joined to said deflected portion by an elastic hinge, said deflected portion having a first end and a second end; and wherein said gimbal spring comprises an elongated member having a forward portion and a rearward portion, said rearward portion being secured to said second end deflected portion, said forward portion including a tab cut out of said forward portion along opposing sides and an end of said tab, said tab being elastically hinged to said elongated member, said transducer member being secured to said tab.
Claim 6
Dependent Claim
56 words
The apparatus of claim 1 wherein said transducer has a first ski, and a second ski, and a trailing edge, and wherein a magnetic core is secured to said first ski along the trailing edge thereof such that said center line of a gap of said runs substantially parallel to said trailing edge of said transducer.
Claim 7
Dependent Claim
29 words
The apparatus of claim 1 wherein said first line extends substantially perpendicular to the radius of said disk passing through the point of transducer proximity to the recording surface.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |