US3205503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for maintaining a predetermined air gap between a transducer head and a record medium in a magnetic data storage device
Assignee: Ex-Cell-O Corp
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Filing: 1962-05-15
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Granted: 1965-09-07
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Expires: 1982-05-15
Abstract
No abstract record available.
Inventors
- 👤 Forrest A Johnson
- 👤 Herbert E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:18
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012; G11B5/48; G11B5/58; G11B5/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A MAGNETIC DATA STORAGE DEVICE HAVING A ROTATABLE BODY PROVIDED WITH A MAGNETIZABLE SURFACE LAYER, A PLURALITY OF MAGNETIC TRANSDUCER HEADS POSITIONED TRANSVERSELY TO THE DIRECTION OF ROTATION OF THE BODY, THESE HEADS HAVING FLUX PATH FORMING POLES TERMINATING IN ONE EXTERMITY THEREOF AND BEING SPACED FROM THE SURFACE LAYER OF THE BODY TO FORM AN AIR GAP THEREBETWEEN, AND IMPROVED MEANS TO CNSISTENTLY AND AUTOMALTICALLY MAINTAIN THIS AIR GAP AT A PREDETERMINED MAGNITUDE, SAID MEANS COMPRISING: A FRAME MEMBER DISPOSED INFISED SPATIAL RELATIONSHIP TO THE SURFACE LAYER ON THE BODY, THE FRAME MEMBER EXTENDING OVER THE SURFACE LAYER IN A DIRECTION SUBSTANTIALLY TRANSVERSE TO THE DIRECTION OF ROTATION OF THE BODY; A CARRIER MEMBER MOUNTING THE MAGNETIC HEADS, THE CARRIER MEMBER BEING OFF SUBSTANTIALLY THE SAME EXTENSION AS THE FRAME MEMBER; INDEPENDENT YIELDABLE SPRING MEANS ATTACHED ADJACENT THE ENDS OF THE FRAME MEMBER AND CARRIER MEMBER RESPECTIVELY FOR SUPPORTING THE CARRIER MEMBER IN JUXTAPOSITION PARALLEL TO THE FRAME MEMBER, SAID SPRING MEANS PERMITTING A LIMITED MOVEMENT OF THE
Claim 2
Dependent Claim
169 words
A MAGNETIC DATA STORAGE DEVICE HAVING A ROTATABLE BODY PROVIDED WITH A MAGNETIZABLE SURFACE LAYER, A PLURALITY OF MAGNETIC TRANSDUCER HEADS POSITIONED TRANSVERSELY TO THE DIRECTION OF ROTATION OF THE BODY, THESE HEADS HAVING FLUX PATH FORMING POLES TERMINATING IN ONE EXTERMITY THEREOF AND BEING SPACED FROM THE SURFACE LAYER OF THE BODY TO FORM AN AIR GAP THEREBETWEEN, AND IMPROVED MEANS TO CNSISTENTLY AND AUTOMALTICALLY MAINTAIN THIS AIR GAP AT A PREDETERMINED MAGNITUDE, SAID MEANS COMPRISING: A FRAME MEMBER DISPOSED INFISED SPATIAL RELATIONSHIP TO THE SURFACE LAYER ON THE BODY, THE FRAME MEMBER EXTENDING OVER THE SURFACE LAYER IN A DIRECTION SUBSTANTIALLY TRANSVERSE TO THE DIRECTION OF ROTATION OF THE BODY; A CARRIER MEMBER MOUNTING THE MAGNETIC HEADS, THE CARRIER MEMBER BEING OFF SUBSTANTIALLY THE SAME EXTENSION AS THE FRAME MEMBER; INDEPENDENT YIELDABLE SPRING MEANS ATTACHED ADJACENT THE ENDS OF THE FRAME MEMBER AND CARRIER MEMBER RESPECTIVELY FOR SUPPORTING THE CARRIER MEMBER IN JUXTAPOSITION PARALLEL TO THE FRAME MEMBER, SAID SPRING MEANS PERMITTING A LIMITED MOVEMENT OF THE
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |