US3870880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for studying the structure of single crystals
Assignee: Individual
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Filing: 1973-10-09
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Granted: 1975-03-11
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Expires: 1993-10-09
Abstract
Abstract A method and apparatus for studying the structure of a single crystal by the detection of X-ray reflections from said crystal operates in a manner such that the sample crystal is first positioned on a rotatable support having means for indicating its angular position and means for driving it at either one of two speeds of rotation, i.e., one rapid and one slow. The crystal support is rotated at its fast speed of rotation while sweeping the angular field of irradiation of the X-rays to obtain reflections. The rotatable support is then replaced at one of the positions where a reflection was observed during the fast rotation and such rotatable support is then rotated at its slow speed of rotation until a reflection occurs again. Means are provided for reading the angular position of the rotatable support, and from those angular positions determining the structure of the crystal.
Inventors
- 👤 Henri Merigoux
- 👤 Jean-Francois Darces
- 👤 Jean-Yves Exertier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:08
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/20; G01N23/20008; G01N23/20025
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
149 words
A method for the control of single crystals by the detection of the reflections of X-rays irradiating said single crystals, comprising the steps of: a. positioning a specimen crystal on a rotatable support; b. rotating said support about its own axis at a fast speed of rotation and simultaneously sweeping with said rotatable support at least a part of the angular field of irradiation of the X-rays to obtain reflections; c. determining the orientation of a direction of the specimen from the angles of said reflections; d. replacing said rotatable support at one of the positions of reflection derived from said fast rotation of the rotatable support; e. rotating said rotatable support about its own axis at a low speed of rotation until the said reflection occurs again; f. reading the angular position of said rotatable support; and g. determining therefrom the orientation of another direction of the specimen.
Claim 2
Independent Claim
149 words
A method for the control of single crystals by the detection of the reflections of X-rays irradiating said single crystals, comprising the steps of: a. positioning a specimen crystal on a rotatable support; b. rotating said support about its own axis at a fast speed of rotation and simultaneously sweeping with said rotatable support at least a part of the angular field of irradiation of the X-rays to obtain reflections; c. determining the orientation of a direction of the specimen from the angles of said reflections; d. replacing said rotatable support at one of the positions of reflection derived from said fast rotation of the rotatable support; e. rotating said rotatable support about its own axis at a low speed of rotation until the said reflection occurs again; f. reading the angular position of said rotatable support; and g. determining therefrom the orientation of another direction of the specimen.
Claim 3
Independent Claim
149 words
A method for the control of single crystals by the detection of the reflections of X-rays irradiating said single crystals, comprising the steps of: a. positioning a specimen crystal on a rotatable support; b. rotating said support about its own axis at a fast speed of rotation and simultaneously sweeping with said rotatable support at least a part of the angular field of irradiation of the X-rays to obtain reflections; c. determining the orientation of a direction of the specimen from the angles of said reflections; d. replacing said rotatable support at one of the positions of reflection derived from said fast rotation of the rotatable support; e. rotating said rotatable support about its own axis at a low speed of rotation until the said reflection occurs again; f. reading the angular position of said rotatable support; and g. determining therefrom the orientation of another direction of the specimen.
Claim 4
Independent Claim
149 words
A method for the control of single crystals by the detection of the reflections of X-rays irradiating said single crystals, comprising the steps of: a. positioning a specimen crystal on a rotatable support; b. rotating said support about its own axis at a fast speed of rotation and simultaneously sweeping with said rotatable support at least a part of the angular field of irradiation of the X-rays to obtain reflections; c. determining the orientation of a direction of the specimen from the angles of said reflections; d. replacing said rotatable support at one of the positions of reflection derived from said fast rotation of the rotatable support; e. rotating said rotatable support about its own axis at a low speed of rotation until the said reflection occurs again; f. reading the angular position of said rotatable support; and g. determining therefrom the orientation of another direction of the specimen.
Claim 5
Dependent Claim
36 words
A method according to claim 1, wherein the specimen is submitted to at least one translational movement in the plane of the rotatable support to detect a disoriented zone in said specimen by loss of reflection.
Claim 6
Dependent Claim
31 words
A method according to claim 2, wherein said translational movement is coupled to said rotational movement of the support, said translational movement being made during the fast rotation of the support.
Claim 7
Dependent Claim
34 words
A method according to claim 2, wherein said translational movement is independent from the rotational movement of the support, said translational movement being made after stopping of the low speed rotation of said support.
Claim 8
Independent Claim
84 words
A device for the control of single crystals by the detection of the reflections of X-rays, comprising; a. a movable carriage; b. a specimen-carrying support rotatably mounted on said movable carriage, said support capable of two speeds of rotation, one fast and the other slow; c. means for controlling the rotational displacement of said specimen-carrying support; d. means for alternatively selecting one of said two speeds of rotation of the specimen-carrying support; and e. means for reading the angular position of said specimen-carrying support.
Claim 9
Independent Claim
84 words
A device for the control of single crystals by the detection of the reflections of X-rays, comprising; a. a movable carriage; b. a specimen-carrying support rotatably mounted on said movable carriage, said support capable of two speeds of rotation, one fast and the other slow; c. means for controlling the rotational displacement of said specimen-carrying support; d. means for alternatively selecting one of said two speeds of rotation of the specimen-carrying support; and e. means for reading the angular position of said specimen-carrying support.
Claim 10
Dependent Claim
45 words
A device according to claim 5, wherein the specimen-carrying support is mounted on a shaft rotatably arranged on said movable carriage, said shaft selectively coupled to a driving motor and pulley for rapid rotation or to a step-by-step motor and gear assembly for slow rotation.
Claim 11
Dependent Claim
37 words
A device according to claim 6, wherein said motor for rapid rotation is direct current operated, wherein said step-by-step motor for slow rotation is operated by a variable frequency impulse generator, and wherein both motors are reversible.
Claim 12
Dependent Claim
128 words
A device according to claim 7, further comprising: a. a base carrying a fixed toothed wheel; b. a detector carrying arm rotatably mounted on said base, said arm carrying a reflection detector, said arm provided with a gear meshing with said toothed wheel; c. a specimen carrying arm rotatably mounted on said base, said specimen carrying arm provided with a gear meshing with said toothed wheel, said specimen carrying arm carrying said movable carriage carrying said specimen carrying support; d. a reversible step-by-step motor coupled to said detector carrying arm and a reversible step-by-step motor coupled to said specimen carrying arm, said motors driven from a variable frequency impulse generator; and e. means for indicating the angular positioN of said detector carrying arm and said specimen carrying arm.
Claim 13
Dependent Claim
30 words
A device according to claim 5, wherein said specimen carrying support is provided with a means for the translation of the specimen in the plane of said specimen carrying support.
Claim 14
Dependent Claim
25 words
A device according to claim 9, wherein said means for the translation of the specimen is independent from the rotation of said specimen carrying support.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |