Multiple test X-ray goniometer
AssigneeMax-Planck-Gesellschaft zur Forderung der Wissenschafter e.V.
InventorAlfred Steinbichler
Life of this patent
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Abstract
To permit X-ray analysis of crystals, selectively, with respect to both pession and rotation, without repositioning of the crystal and disturbance of crystal position, a goniometer head is located in the path of a primary X-ray beam and connected to a shaft which can be stepped in rotary movement by selective engagement through precision precession drive gearing. To prevent accidental engagement of the precession drive gearing, interlocks are provided to disable energization of the motor when rotation crystal diffraction tests are being made and the shaft is locked in position by a locking screw.
Claims10
Multiple test X-ray goniometer for X-ray analysis of crystals, selectively, with respect to precession and rotation, without disturbance of crystal position with respect to an X-ray beam, comprising
- a precession camera unit (14)
- a goniometer head (18) located in the path (26) of a primary beam and having means (22) to hold a crystal test sample (24) in a predetermined position relative to said precession camera;
- a shaft (28) rotatably supporting said goniometer head (18) and hence said crystal test sample (24);
- a drive gearing (34, 36) coupled to the shaft (28) to rotate the shaft and hence the goniometer head (18), and with it the crystal test sample (24) in the holding means (22);
- motor drive means (38) coupled to the drive gearing (34, 36), the drive gearing (34, 36) and the shaft forming a drive train for the goniometer head (18);
- locking means (48) engageable with the shaft (28) of the goniometer head (20) to fix the goniometer head shaft (28) and hence the crystal test sample (24) in position;
- and wherein the drive continuity of said drive train is selectively interruptable to interrupt transmission of rotary movement between said shaft (28) of the goniometer head (20) and the drive motor (38) and prevent application of drive power to said shaft when the locking means have engaged the shaft to fix it in position.
Dependencies are inferred from the claim text.