Patent US3728541A successfully refreshed from Google Patents.
US3728541A
Expired / Lapsed
US
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X-ray diffractometer
Assignee: Yeda Research and Development Co Ltd
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Filing: 1972-01-05
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Granted: 1973-04-17
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Expires: 1992-01-05
Abstract
Abstract An X-ray diffractometer has a yoke on which a crystal is mounted so that a particular rational axis thereof intersects the axis of the X-ray beam at a predetermined angle. A direct counting detector mounted on the yoke is selectively positionable in both azimuth and elevation with respect to the particular rational axis of the crystal. The yoke is constructed and arranged to effect precession of both the particular rational axis of the crystal and the detector about the axis of the beam.
Inventors
- 👤 D Rabinovich
- 👤 G Schmidt
- 👤 E Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:42
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/20; G01N23/20008; G01N23/20025
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
117 words
An X-ray diffractometer for positioning a crystal in an X-ray beam and measuring the intensity of reflected radiation comprising: a yoke on which a crystal can be mounted so that a particular rational direction thereof intersects the axis of the beam at a predetermined angle, a photon-sensitive detector movably mounted on the yoke and selectively positionable in azimuth and elevation with respect to the particular rational direction of the crystal, the output of the detector being proportional to the intensity of the reflected radiation intercepted by the detector, and the yoke being constructed and arranged to effect precession of both the particular rational direction of the crystal and the detector about the axis of the X-ray beam.
Claim 2
Dependent Claim
117 words
An X-ray diffractometer for positioning a crystal in an X-ray beam and measuring the intensity of reflected radiation comprising: a yoke on which a crystal can be mounted so that a particular rational direction thereof intersects the axis of the beam at a predetermined angle, a photon-sensitive detector movably mounted on the yoke and selectively positionable in azimuth and elevation with respect to the particular rational direction of the crystal, the output of the detector being proportional to the intensity of the reflected radiation intercepted by the detector, and the yoke being constructed and arranged to effect precession of both the particular rational direction of the crystal and the detector about the axis of the X-ray beam.
Claim 3
Dependent Claim
108 words
An X-ray diffractometer according to claim 1, wherein the yoke comprises a first gimbal fork mounted for pivotal movement about a first axis intersecting the beam at a right angle, a second gimbal fork mounted on the first fork for pivotal movement about a second axis perpendicular to the first axis and passing through the point where the beam intersects the first axis, a drive member mounted for rotation about the axis of the beam, and a pivotal connection between the drive member and the second fork, the axis of the pivotal connection passing through the point at which the first and second axes intersect with the beam.
Claim 4
Dependent Claim
36 words
An X-ray diffractometer according to claim 2, wherein the drive member is arcuate in shape, the center of curvature of the drive member being the point at which the first and second axes intersect the beam.
Claim 5
Dependent Claim
43 words
An X-ray diffractometer according to claim 3, including a drive motor for moving the drive member to preselected angular positions, and an azimuth motor for rotating the detector about the axis of the pivotal connection between the drive member and the second fork.
Claim 6
Dependent Claim
45 words
An X-ray diffractometer according to claim 4, including a drum rotatable on the second gimbal yoke about the same axis as the pivotal connection; the detector being mounted eccentrically in the drum and the azimuth motor serving to move the drum to preselected angular positions.
Claim 7
Dependent Claim
30 words
An X-ray diffractometer according to claim 5, wherein the drive motor and the azimuth motor are stepping motors that impart incremental movement to the drive member and the drum respectively.
Claim 8
Dependent Claim
25 words
An X-ray diffractometer according to claim 6, including motor control means for controlling the drive and drum motors in accordance with a computer controlled program.
Claim 9
Dependent Claim
61 words
A method for using the X-ray diffractometer according to claim 1, wherein the yoke is operated to cause precession of both the particular rational axis of the crystal and the detector about the beam direction, and the azimuth and elevation of the detector are periodically changed in a manner to cause the detector to map the intensity of the reflected beam.
Claim 10
Dependent Claim
40 words
An X-ray diffractometer according to claim 1, wherein the detector is constituted by a counter having an aperture defining means masking the counter and limiting the field of view of the detector for preventing unwanted reflections from reaching the surface.
Claim 11
Dependent Claim
47 words
An X-ray diffractometer according to claim 9, including a drum mounted on the yoke so as to be rotatable about the particular rational direction of the crystal, the counter being eccentrically mOunted on the drum so that rotation of the drum changes the aximuth of the detector.
Claim 12
Dependent Claim
24 words
An X-ray diffractometer according to claim 1, wherein the axis of the detector is substantially parallel to the particular rational direction of the crystal.
Claim 13
Dependent Claim
28 words
An X-ray diffractometer according to claim 1 wherein the axis of the detector passes through the point where the beam intersects the particular rational direction of the crystal.
Claim 14
Dependent Claim
29 words
An X-ray diffractometer according to claim 4, wherein the axis of the detector passes through the point at which the first and second axes intersect with the X-ray beam.
Claim 15
Dependent Claim
128 words
An X-ray diffractometer according to claim 13 wherein the second gimbal fork includes a first support ring pivotally connected to the first gimbal fork, a second support ring mounted on a first support ring for rotation thereon about the axis of the pivotal connection between the drive member and the second gimbal fork, a curved guide diametrically spanning and rigidly connected to the second support ring for establishing a cylindrical guide surface whose axis of perpendicular to the axis of the pivotal connection between the drive member and the second gimbal fork and passes through the intersection of the first and second axes, the detector being adjustably mounted on the second support ring so that the axis of the detector is perpendicular to the cylindrical guide surface period.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |