Patent US4267154A successfully refreshed from Google Patents.
US4267154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing high quality crystals
Assignee: Individual
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Filing: 1979-08-20
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Granted: 1981-05-12
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Expires: 1999-08-20
Abstract
Abstract Method and apparatus for manufacturing high quality crystals whereby crystal growth occurs from a melt or a gas phase and during such growth, the growing crystals are subjected to a gravitational acceleration generating and reinforcing the development of a chronologically constant, highly stationary, convection current within the growing crystal. The apparatus includes a centrifuge means having a crystal growth means mounted thereon, along with means for controlling the centrifuge and for controlling the thermal system associated with the crystal growth means.
Inventors
- 👤 Georg Mueller
- 👤 Herbert Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:54
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/30; C30B15/305; C30B13/00; C30B13/26; C30B13/32; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10T; Y10T117/00; Y10T117/10; Y10T117/1004; Y10T117/1008; Y10T117/1024; Y10T117/1032; Y10T117/1068; Y10T117/1076; Y10T117/108; Y10T117/1092
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
An apparatus for manufacture of highly quality crystals comprising: (a) a centrifuge means having a horizontally operated arm; (b) a temperature controllable crystal growth system positioned on said arm in a rotatable and tiltable manner; (c) a furnace trap mounted on said centrifuge in a symmetrical fashion relative to the center of rotation; (d) a shunt-motor operationally coupled to said centrifuge means for driving said centrifuge; (e) an electromagnetic proximity switch in operational association with said centrifuge for measuring the number of revolutions of said centrifuge; (f) a current supply means operationally associated with said crystal growth system; (g) thermo-couples operationally associated with said crystal growth system for regulating and sensing the temperature thereof; (h) acceleration-proof amplifiers positioned on said centrifuge arm for providing thermo-electrical voltages to said crystal growth system; and (i) a slip ring system mounted on said centrifuge means and operationally associated with said crystal growth system and said amplifiers for transmitting the thermo-electrical voltage from said amplifiers to said crystal growth system.
Claim 2
Independent Claim
166 words
An apparatus for manufacture of highly quality crystals comprising: (a) a centrifuge means having a horizontally operated arm; (b) a temperature controllable crystal growth system positioned on said arm in a rotatable and tiltable manner; (c) a furnace trap mounted on said centrifuge in a symmetrical fashion relative to the center of rotation; (d) a shunt-motor operationally coupled to said centrifuge means for driving said centrifuge; (e) an electromagnetic proximity switch in operational association with said centrifuge for measuring the number of revolutions of said centrifuge; (f) a current supply means operationally associated with said crystal growth system; (g) thermo-couples operationally associated with said crystal growth system for regulating and sensing the temperature thereof; (h) acceleration-proof amplifiers positioned on said centrifuge arm for providing thermo-electrical voltages to said crystal growth system; and (i) a slip ring system mounted on said centrifuge means and operationally associated with said crystal growth system and said amplifiers for transmitting the thermo-electrical voltage from said amplifiers to said crystal growth system.
Claim 3
Dependent Claim
25 words
An apparatus as defined in claim 1, wherein the crystal growth system comprises a three-zone furnace and a heat-exchange means is associated with such furnace.
Claim 4
Dependent Claim
17 words
An apparatus as defined in claim 1, wherein said crystal growth system comprises a zone pulling apparatus.
Claim 5
Dependent Claim
28 words
An apparatus as defined in claim 1, wherein a data detection means and a control means coupled to a program generator are operationally coupled with said centrifuge means.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |