Patent US3650074A successfully refreshed from Google Patents.
US3650074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for cutting, grinding and polishing single-crystal workpieces
Assignee: Individual
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Filing: 1970-04-10
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Granted: 1972-03-21
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Expires: 1990-04-10
Abstract
Abstract Mechanical vibrations generated during the cutting, grinding and polishing of single-crystal material, such as diamonds, are converted into electrical signals by a transducer; amplified; and used to control the rotation of the workpiece holder. The control is such that the single-crystal material is oriented along its ''''easy'''' axis, for ease of cutting, etc.
Inventors
- 👤 Ernst August Weinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:16
CPC Classifications
B; B24; B24B; B24B9/00; B24B9/02; B24B9/06; B24B9/16; B24B9/167
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A method of adjusting the orientation of a single-crystal workpiece, with respect to a cutting tool, so that said workpiece attains a preferred orientation, comprising the steps of: generating an electrical signal representative of the difference between the present orientation of the workpiece and said preferred orientation; and rotating said workpiece, with respect to said tool, under control of said electrical signal, until the workpiece attains said preferred orientation.
Claim 2
Independent Claim
69 words
A method of adjusting the orientation of a single-crystal workpiece, with respect to a cutting tool, so that said workpiece attains a preferred orientation, comprising the steps of: generating an electrical signal representative of the difference between the present orientation of the workpiece and said preferred orientation; and rotating said workpiece, with respect to said tool, under control of said electrical signal, until the workpiece attains said preferred orientation.
Claim 3
Dependent Claim
73 words
The method according to claim 1, wherein the magnitude of said electrical signal decreases as the orientation of said workpiece approaches the preferred orientation; the method comprising the further steps of: amplifying said electrical signal in a control circuit including a bistable device having a predetermined threshold; and terminating the rotation of said workpiece, under control of said bistable device, whenever the magnitude of said amplified electrical signal falls below said predetermined threshold.
Claim 4
Dependent Claim
56 words
The method according to claim 2, comprising the further step of: adjusting the amplifying sensitivity of said control circuit to compensate for variations in the magnitude of said electrical signal caused by variations in the relative movement of said workpiece and said tool; and by variations in the mechanical properties of said workpiece and said tool.
Claim 5
Dependent Claim
72 words
The method according to claim 1, wherein the magnitude of said electrical signal increases as the orientation of said workpiece approaches the preferred orientation; the method comprising the further steps of: amplifying said electrical signal in a control circuit including a bistable device having a predetermined threshold; and terminating the rotation of said workpiece, under control of said bistable device, whenever the magnitude of said amplified electrical signal exceeds said predetermined threshold.
Claim 6
Dependent Claim
56 words
The method according to claim 4, comprising the further step of: adjusting the amplifying sensitivity of said control circuit to compensate for variations in the magnitude of said electrical signal caused by variations in the relative movement of said workpiece and said tool; and by variations in the mechanical properties of said workpiece and said tool.
Claim 7
Dependent Claim
101 words
Apparatus for automatically rotating a single crystal workpiece, with respect to a cutting tool, so that said workpiece attains a preferred orientation, which comprises: means for supporting said workpiece proximate said cutting tool; a vibration-sensitive pickup device mounted to said supporting means for converting mechanical vibrations established therein by the interaction of said tool and said workpiece into an electrical signal, the magnitude of said electrical signal being proportional to the difference between the present orientation of the workpiece and the preferred orientation; and means, responsive to the magnitude of said electrical signal, for rotating said workpiece towards said preferred orientation.
Claim 8
Dependent Claim
101 words
Apparatus for automatically rotating a single crystal workpiece, with respect to a cutting tool, so that said workpiece attains a preferred orientation, which comprises: means for supporting said workpiece proximate said cutting tool; a vibration-sensitive pickup device mounted to said supporting means for converting mechanical vibrations established therein by the interaction of said tool and said workpiece into an electrical signal, the magnitude of said electrical signal being proportional to the difference between the present orientation of the workpiece and the preferred orientation; and means, responsive to the magnitude of said electrical signal, for rotating said workpiece towards said preferred orientation.
Claim 9
Dependent Claim
80 words
The apparatus according to claim 6, wherein said rotating means comprises an electric motor; and the apparatus further comprises: amplifying means for amplifying the magnitude of the electrical signal from said pickup device; and control means, connected to the output of said amplifying means, including a bistable device having a predetermined threshold, for disconnecting the energizing potential applied to said motor whenever the magnitude of said Amplified electrical signal exceeds said predetermined threshold thereby terminating further rotation of said workpiece.
Claim 10
Dependent Claim
34 words
The apparatus according to claim 7, further comprising: means, connected to the input of said amplifying means, for adjusting the sensitivity thereof to compensate for variations in the magnitude of said electrical signal caused.
Claim 11
Dependent Claim
81 words
The apparatus according to claim 6, wherein said rotating means comprises an electric motor; and the apparatus further comprises: amplifying means for amplifying the magnitude of the electrical signal from said pickup device; and control means, connected to the output of said amplifying means, including a bistable device having a predetermined threshold, for disconnecting the energizing potential applied to said motor whenever the magnitude of said amplified electrical signal falls below said predetermined threshold thereby terminating further rotation of said workpiece.
Claim 12
Dependent Claim
34 words
The apparatus according to claim 9, further comprising: means, connected to the input of said amplifying means, for adjusting the sensitivity thereof to compensate for variations in the magnitude of said electrical signal caused.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |