US3848876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning element
Assignee: Deutsche Thomson OHG
•
Filing: 1972-09-29
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Granted: 1974-11-19
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Expires: 1992-09-29
Abstract
Abstract A stylus for scanning signal-storing undulations on the surface of a carrier, which stylus includes a diamond whose tracing portion lies at the intersection of at least two natural crystal faces.
Inventors
- 👤 G Joschko
- 👤 H Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:43
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
In a signal scanning means for scanning of signals stored on an information carrier which is moving with a velocity relative to the signal scanning means, the combination of a transducer body, and a scanning element attached to the transducer body for scanning signal-storing undulations on the surface of the information carrier, the scanning element comprising a diamond having natural crystal faces and at its tracing portion a rounded intersection of at least two natural crystal faces and at the intersection a sharply retreating trailing edge.
Claim 2
Dependent Claim
86 words
In a signal scanning means for scanning of signals stored on an information carrier which is moving with a velocity relative to the signal scanning means, the combination of a transducer body, and a scanning element attached to the transducer body for scanning signal-storing undulations on the surface of the information carrier, the scanning element comprising a diamond having natural crystal faces and at its tracing portion a rounded intersection of at least two natural crystal faces and at the intersection a sharply retreating trailing edge.
Claim 3
Dependent Claim
21 words
A signal scanning means as claimed in claim 1, said diamond having at its tracing portion a rounded natural crystal edge.
Claim 4
Dependent Claim
21 words
A signal scanning means as claimed in claim 1, said diamoNd having at its tracing portion a rounded natural crystal corner.
Claim 5
Dependent Claim
16 words
A signal scanning means as claimed in claim 1, said diamond being a cubic diamond crystal.
Claim 6
Dependent Claim
13 words
A signal scanning means as claimed in claim 4, said diamond being synthetic.
Claim 7
Dependent Claim
32 words
A signal scanning means as claimed in claim 5, said tracing portion consisting of a corner formed by the intersection of three natural crystal faces of the diamond, said corner being rounded.
Claim 8
Dependent Claim
21 words
A signal scanning means as claimed in claim 5, said diamond containing nitrogen in an amount effective for increasing impact resistance.
Claim 9
Dependent Claim
28 words
A signal scanning means as claimed in claim 1, said diamond having a face coated with an electrically conductive substance, further comprising a piezoelectric transducer contacting said substance.
Claim 10
Dependent Claim
16 words
A signal scanning means as claimed in claim 8, said transducer being sinter-bonded to said substance.
Claim 11
Dependent Claim
16 words
A signal scanning means as claimed in claim 1, said diamond being a cubo-octahedral diamond crystal.
Claim 12
Dependent Claim
13 words
A signal scanning means as claimed in claim 10, said diamond being synthetic.
Claim 13
Dependent Claim
32 words
A signal scanning means as claimed in claim 11, said tracing portion consisting of a corner formed by the intersection of three natural crystal faces of the diamond, said corner being rounded.
Claim 14
Dependent Claim
96 words
In a signal scanning means for scanning of signals stored on an information carrier which is moving with a velocity relative to the signal scanning means, the combination of a transducer body, and a scanning element attached to the transducer body for scanning signal-storing undulations on the surface of the information carrier, the scanning element comprising a diamond having natural crystal faces and at its tracing portion a natural crystal edge formed by the intersection of two natural crystal faces, said edge showing a natural chamfer and having at one end a sharply retreating trailing edge.
Claim 15
Dependent Claim
96 words
In a signal scanning means for scanning of signals stored on an information carrier which is moving with a velocity relative to the signal scanning means, the combination of a transducer body, and a scanning element attached to the transducer body for scanning signal-storing undulations on the surface of the information carrier, the scanning element comprising a diamond having natural crystal faces and at its tracing portion a natural crystal edge formed by the intersection of two natural crystal faces, said edge showing a natural chamfer and having at one end a sharply retreating trailing edge.
Claim 16
Dependent Claim
17 words
A signal scanning means as claimed in claim 13, said chamfer being a natural dodecahedral crystal face.
Claim 17
Dependent Claim
14 words
A signal scanning means as claimed in claim 13, said chamfer being rounded off.
Claim 18
Dependent Claim
24 words
A signal scanning means as claimed in claim 13, said diamond being synthetic and containing nitrogen in an amount effective for increasing impact resistance.
Claim 19
Dependent Claim
28 words
A signal scanning means as claimed in claim 13, said diamond having a face coated with an electrically conductive substance, further comprising a piezoelectric transducer contacting said substance.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |