Patent US3573769A successfully refreshed from Google Patents.
US3573769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head with air relief slots
Assignee: General Electric Co
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Filing: 1967-10-30
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Granted: 1971-04-06
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Expires: 1987-10-30
Abstract
Abstract An improved arrangement is disclosed of magnetic heads and tape for writing, reading, and erasing. The arrangement is particularly advantageous for high-speed tape operation, such as for electronic computers, where reliable operation is required and minimum wear is desired in order to achieve long life for the magnetic heads. A particular angle is disclosed for entry of the tape against the head. One or more air diversion means such as lateral slots are provided in the head to divert the airflow which accompanies the moving tape, thus preventing it from tending to lift the tape out of contact with the head. These air slots may be slanted and/or tapered to direct the diverted airflow in a desired direction. For a dual-gap head, an air relief means is disclosed for use between the gaps. An erase head is adjustably secured to the read-write head, to provide a unitary combination.
Inventors
- 👤 James D Flora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:23
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/488; G11B5/4893; G11B15/00; G11B15/60; G11B15/62; G11B5/127; G11B5/265; G11B5/62
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
148 words
A magnetic head arrangement for use with magnetic tape, including a magnetic head having a first tape contact region provided with at least one reading magnetic gap and a second tape contact region provided with at least one writing magnetic gap, said head being recessed to provide a valley between said first and second tape contact regions, said tape contact regions being arranged in tandem with respect to the direction of tape motion over the head, wherein the improvement comprises an air deflection slot provided at said magnetic head at positions prior to the locations of initial contact of said tape with said tape contact regions, said air deflection slot being adapted to deflect airflow that accompanies the moving tape, and including a slot provided laterally across said head substantially at the bottom of said valley, said last-named slot being adapted to relieve air pressure from said valley.
Claim 2
Dependent Claim
148 words
A magnetic head arrangement for use with magnetic tape, including a magnetic head having a first tape contact region provided with at least one reading magnetic gap and a second tape contact region provided with at least one writing magnetic gap, said head being recessed to provide a valley between said first and second tape contact regions, said tape contact regions being arranged in tandem with respect to the direction of tape motion over the head, wherein the improvement comprises an air deflection slot provided at said magnetic head at positions prior to the locations of initial contact of said tape with said tape contact regions, said air deflection slot being adapted to deflect airflow that accompanies the moving tape, and including a slot provided laterally across said head substantially at the bottom of said valley, said last-named slot being adapted to relieve air pressure from said valley.
Claim 3
Dependent Claim
55 words
The arrangement as claimed in claim 1, in which said slot is positioned below said valley, and including a slit extending alongside said slot and communicating said slot with said valley, said slit being narrower than said slot thereby to reduce any influence by said slot on the shielding effectiveness between said tape contact regions.
Claim 4
Dependent Claim
29 words
The arrangement as claimed in claim 1, including an erase head adjustably attached within a recess provided in said magnetic head in a position for magnetically erasing said tape.
Claim 5
Dependent Claim
26 words
The arrangement as claimed in claim 1, in which said air deflection slots provided in said head extend substantially laterally across the width of the head.
Claim 6
Dependent Claim
27 words
The arrangement as claimed in claim 4, in which said slots are slanted from true lateral so as to direct the deflected air sideways of said head.
Claim 7
Dependent Claim
24 words
The arrangement as claimed in claim 4, in which said slots are tapered so as to direct the deflected air sideways of said head.
Claim 8
Dependent Claim
122 words
A magnetic head arrangement for use with magnetic tape, including a magnetic head having a first tape contact region provided with at least one magnetic gap and a second tape contact region, said head being recessed to provide a valley between said first and second tape contact regions, wherein the improvement comprises an air deflection slot proviDed in said magnetic head at positions prior to the locations of initial contact of said tape with said tape contact regions, said air deflection slot being adapted to deflect airflow that accompanies the tape when moving, and including a second slot provided laterally across said head substantially at the bottom of said valley, said second slot being adapted to relieve air pressure from said valley.
Claim 9
Dependent Claim
122 words
A magnetic head arrangement for use with magnetic tape, including a magnetic head having a first tape contact region provided with at least one magnetic gap and a second tape contact region, said head being recessed to provide a valley between said first and second tape contact regions, wherein the improvement comprises an air deflection slot proviDed in said magnetic head at positions prior to the locations of initial contact of said tape with said tape contact regions, said air deflection slot being adapted to deflect airflow that accompanies the tape when moving, and including a second slot provided laterally across said head substantially at the bottom of said valley, said second slot being adapted to relieve air pressure from said valley.
Claim 10
Dependent Claim
60 words
The arrangement as claimed in claim 7, in which said second slot is positioned below said valley, and including a slit extending alongside said second slot and communicating said second slot with said valley, said slit being narrower than said second slot thereby to reduce any influence by said second slot on the shielding effectiveness between said tape contact regions.
Claim 11
Dependent Claim
26 words
The arrangement as claimed in claim 7, in which said air deflection slot provided in said head extends substantially laterally across the width of the head.
Claim 12
Dependent Claim
27 words
The arrangement as claimed in claim 9, in which said slots are slanted from true lateral so as to direct the deflected air sideways of said head.
Claim 13
Dependent Claim
24 words
The arrangement as claimed in claim 9, in which said slots are tapered so as to direct the deflected air sideways of said head.
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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) | 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 |