US3573768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepped magnetic head with offset biasing
Assignee: Singer Co
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Filing: 1967-10-20
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Granted: 1971-04-06
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Expires: 1987-10-20
Abstract
Abstract The slider of a flying head is stepped to provide a plurality of support areas, equal or not, preferably two, one upstream from the other, which fly with their trailing edges at equal distances from the record disc and with a stable up-attitude. The step may be formed by the vacuum deposition of, for example, 50 microinches of metal on the upstream support area.
Inventors
- 👤 George A Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:30
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B5/127; G11B5/187; G11B5/1871
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
197 words
In an air-lubricated, flying-head construction for supporting a magnetic transducer adjacent a movable magnetic record surface, the combination comprising: a. a slider having stepped separate support areas spaced-apart in the direction of motion of said record surface relative to said slider, the upstream one of said support areas having a leading edge and a lagging edge with respect to the direction of motion of said record surface, the support forces due to the pressure of the air lubrication being concentrated in said separate areas; b. means supporting the slider for rotation in the pitch direction; and c. yieldable biasing means for applying a force to said slider toward said record surface at a location situated downstream of said lagging edge, for causing said lagging edge to contact said record surface when the support forces due to the pressure of the air lubrication between said support areas and said record surface is less than the force of said biasing means, the contact between said lagging edge and said record surface acting as a pitch axis about which said biasing force imposes a torque on said slider so as to bias said leading edge away from said record surface.
Claim 2
Dependent Claim
197 words
In an air-lubricated, flying-head construction for supporting a magnetic transducer adjacent a movable magnetic record surface, the combination comprising: a. a slider having stepped separate support areas spaced-apart in the direction of motion of said record surface relative to said slider, the upstream one of said support areas having a leading edge and a lagging edge with respect to the direction of motion of said record surface, the support forces due to the pressure of the air lubrication being concentrated in said separate areas; b. means supporting the slider for rotation in the pitch direction; and c. yieldable biasing means for applying a force to said slider toward said record surface at a location situated downstream of said lagging edge, for causing said lagging edge to contact said record surface when the support forces due to the pressure of the air lubrication between said support areas and said record surface is less than the force of said biasing means, the contact between said lagging edge and said record surface acting as a pitch axis about which said biasing force imposes a torque on said slider so as to bias said leading edge away from said record surface.
Claim 3
Dependent Claim
57 words
The combination of claim 1 wherein the force and rate of said biasing means is proportioned and adjusted with respect to the size of said slider and the speed of said motion to cause said slider to fly with the trailing edges of the leading and trailing support areas at substantially equal distances from said record surface.
Claim 4
Dependent Claim
15 words
The combination of claim 2 wherein said separate support areas are substantially flat and parallel.
Claim 5
Dependent Claim
65 words
The combination of claim 1 wherein the force and rate of said biasing means is proportioned and adjusted with respect to the size of said slider and the speed of said motion to cause said slider to fly with the trailing edges of the leading and trailing support areas at a distance from said record surface substantially equal to the step between adjacent support areas.
Claim 6
Dependent Claim
226 words
In an air-lubricated, flying-head construction for supporting a magnetic transducer adjacent a movable magnetic record surface, the combination comprising: a. a slider having separate support areas spaced-apart in the direction of motion of said record surface relative to said slider, the upstream one of said support areas having a leading edge and a lagging edge with respect to the direction of motion of said record surface, the support forces due to the pressure of the air lubrication being concentrated in said separate areas; b. means supporting the slider for rotation in the pitch direction; and c. yieldable biasing means for applying a force to said slider toward said record surface, the foremost support area being stepped toward said record surface relative to the support area immediately downstream from it; said force of said biasing means being applied to said slider at a location situated downstream of said lagging edge, for causing said lagging edge to contact said record surface when the support forces due to the pressure of the air lubrication between said support areas and said record surface is less than the force of said biasing means, the contact between said lagging edge and said record surface acting as a pitch axis about which said biasing force imposes a torque on said slider so as to bias said leading edge away from said record surface.
Claim 7
Dependent Claim
226 words
In an air-lubricated, flying-head construction for supporting a magnetic transducer adjacent a movable magnetic record surface, the combination comprising: a. a slider having separate support areas spaced-apart in the direction of motion of said record surface relative to said slider, the upstream one of said support areas having a leading edge and a lagging edge with respect to the direction of motion of said record surface, the support forces due to the pressure of the air lubrication being concentrated in said separate areas; b. means supporting the slider for rotation in the pitch direction; and c. yieldable biasing means for applying a force to said slider toward said record surface, the foremost support area being stepped toward said record surface relative to the support area immediately downstream from it; said force of said biasing means being applied to said slider at a location situated downstream of said lagging edge, for causing said lagging edge to contact said record surface when the support forces due to the pressure of the air lubrication between said support areas and said record surface is less than the force of said biasing means, the contact between said lagging edge and said record surface acting as a pitch axis about which said biasing force imposes a torque on said slider so as to bias said leading edge away from said record surface.
Claim 8
Dependent Claim
33 words
The combination of claim 5 wherein the upstream one of said separate support areas extends less than half the distance from its leaDing edge to the trailing edge of the downstream support area.
Claim 9
Dependent Claim
15 words
The combination of claim 5 wherein said separate support areas are substantially flat and parallel.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |