Patent US3413627A successfully refreshed from Google Patents.
US3413627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head mounting
Assignee: PRAKLA GES fur PRAKTISCHE LAGE
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Filing: 1965-10-06
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Granted: 1968-11-26
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Expires: 1985-10-06
Abstract
No abstract record available.
Inventors
- 👤 Friedhelm K Sender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A MAGNETIC HEAD POSITIONING DEVICE FOR GUIDING A MAGNETIC HEAD IN A DIRECTION NORMAL TO THE SURFACE OF A MOVABLE MAGNETIC RECORDING MEDIUM, COMPRISING AN INSTRUMENT FRAME SUITABLY POSITIONED OPPOSITE THE RECORDING MEDIUM AND HAVING A GUIDE TRACK ALONG AN INSIDE SURFACE THEREOF THAT IS SUBSTANTIALLY NORMAL TO A PLANE TANGENT TO THE RECORDING MEDIUM AT THE POINT OF RECORDING, A MAGNETIC HEAD HAVING A NORMAL GUIDE TRACK ALONG AN OUTSIDE SURFACE THEREOF AND DISPOSED OPPOSITE SAID NORMAL TRACK OF SAID INSTRUMENT FRAME, AT LEAST TWO BALLS SPACED APART FOR TRAVELING BETWEEN SAID NORMAL TRACKS, SAID MAGNETIC HEAD HAVING AN OUTSIDE TRACK INCLINED TO THE NORMAL IN THE DIRECTION OF MOTION OF THE RECORDING MEDIUM ON ANOTHER SIDE OF SAID MAGNETIC HEAD FROM SAID NORMAL TRACKS, SAID INSTRUMENT FRAME CARRYING A RESILIENTLY MOUNTED COUNTERTRACK SIMILARLY INCLINED AND OPPOSITELY DISPOSED TO SAID INCLINED TRACK, A THIRD BALL FOR TRAVELING BETWEEN SAID INCLINED TRACK AND COUNTERTRACK, WHEREBY SAID MAGNETIC HEAD IS URGED NORMALLY TO THE SURFACE OF THE RECORDING MEDIUM WITHOUT INTERSPACES.
Claim 2
Dependent Claim
170 words
A MAGNETIC HEAD POSITIONING DEVICE FOR GUIDING A MAGNETIC HEAD IN A DIRECTION NORMAL TO THE SURFACE OF A MOVABLE MAGNETIC RECORDING MEDIUM, COMPRISING AN INSTRUMENT FRAME SUITABLY POSITIONED OPPOSITE THE RECORDING MEDIUM AND HAVING A GUIDE TRACK ALONG AN INSIDE SURFACE THEREOF THAT IS SUBSTANTIALLY NORMAL TO A PLANE TANGENT TO THE RECORDING MEDIUM AT THE POINT OF RECORDING, A MAGNETIC HEAD HAVING A NORMAL GUIDE TRACK ALONG AN OUTSIDE SURFACE THEREOF AND DISPOSED OPPOSITE SAID NORMAL TRACK OF SAID INSTRUMENT FRAME, AT LEAST TWO BALLS SPACED APART FOR TRAVELING BETWEEN SAID NORMAL TRACKS, SAID MAGNETIC HEAD HAVING AN OUTSIDE TRACK INCLINED TO THE NORMAL IN THE DIRECTION OF MOTION OF THE RECORDING MEDIUM ON ANOTHER SIDE OF SAID MAGNETIC HEAD FROM SAID NORMAL TRACKS, SAID INSTRUMENT FRAME CARRYING A RESILIENTLY MOUNTED COUNTERTRACK SIMILARLY INCLINED AND OPPOSITELY DISPOSED TO SAID INCLINED TRACK, A THIRD BALL FOR TRAVELING BETWEEN SAID INCLINED TRACK AND COUNTERTRACK, WHEREBY SAID MAGNETIC HEAD IS URGED NORMALLY TO THE SURFACE OF THE RECORDING MEDIUM WITHOUT INTERSPACES.
References Cited (Backward Citations)
US2887890A
Cited
US3310791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |