US3698057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible fixture for positioning magnetic memory cores
Assignee: RCA Corp
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Filing: 1971-06-10
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Granted: 1972-10-17
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Expires: 1991-06-10
Abstract
Abstract A fixture for accurately positioning magnetic memory cores in an array has a top surface for receiving agitated magnetic cores and has a bottom surface for connection to a source of vacuum. The fixture comprises a flat rigid laminar metallic plate formed from a plurality of thin flexible sheets, having etched apertures, arranged in top, middle, and bottom groups, all bonded together in precise registry. The sheets of the top group and the sheets of the bottom group are the same in having rectangular apertures each dimensioned to receive a core edgewise to a depth of up to one-half of the outer diameter of the core. The sheets of the middle group have smaller apertures. The useful life of the fixture can be doubled by turning it over when the top surface becomes worn by the abrasive cores.
Inventors
- 👤 Clifford George Warner
- 👤 James Henry Kade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:34
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/02; G11C5/04; G11C5/05; Y; Y10; Y10S; Y10S269/00; Y10S269/903; Y10S29/00; Y10S29/044; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53165
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
A fixture for accurately positioning magnetic memory cores in an array and having a top surface for receiving agitated magnetic cores and having a bottom surface for connection to a source of vacuum, comprising a flat rigid laminar metallic plate formed from a plurality of thin flexible sheets arranged in top, middle, and bottom groups, all bonded together in precise registry, the top group of sheets and the bottom group of sheets each having a thickness when laminated equal to about one-half the outside diameter of said magnetic cores, and having rectangular apertures each dimensioned to receive a core edgewise to a depth of up to one-half of the outer diameter of the core, and the middle group of sheets having approximately square apertures each having dimensions on a side about equal to the thickness of said cores, whereby the useful life of the fixture can be doubled by turning it over when the top surface becomes worn.
Claim 2
Dependent Claim
158 words
A fixture for accurately positioning magnetic memory cores in an array and having a top surface for receiving agitated magnetic cores and having a bottom surface for connection to a source of vacuum, comprising a flat rigid laminar metallic plate formed from a plurality of thin flexible sheets arranged in top, middle, and bottom groups, all bonded together in precise registry, the top group of sheets and the bottom group of sheets each having a thickness when laminated equal to about one-half the outside diameter of said magnetic cores, and having rectangular apertures each dimensioned to receive a core edgewise to a depth of up to one-half of the outer diameter of the core, and the middle group of sheets having approximately square apertures each having dimensions on a side about equal to the thickness of said cores, whereby the useful life of the fixture can be doubled by turning it over when the top surface becomes worn.
Claim 3
Dependent Claim
90 words
A vacuum fixture for accurately positioning small articles in an array and having a top surface for receiving said articles and having a bottom surface for connection to a source of vacuum, comprising a metallic plate formed from top, middle, and bottom members bonded together in precise registry, the top member and the bottom member being the same and having apertures dimensioned to receive said articles, and the middle member having smaller apertures providing vacuum ports between respective apertures in the top and bottom members, whereby the fixture is reversible.
Claim 4
Dependent Claim
90 words
A vacuum fixture for accurately positioning small articles in an array and having a top surface for receiving said articles and having a bottom surface for connection to a source of vacuum, comprising a metallic plate formed from top, middle, and bottom members bonded together in precise registry, the top member and the bottom member being the same and having apertures dimensioned to receive said articles, and the middle member having smaller apertures providing vacuum ports between respective apertures in the top and bottom members, whereby the fixture is reversible.
References Cited (Backward Citations)
US2782574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |