Detector for X-ray spectroscopes with means to detect different wavelengths of x-radiation

Claim 1

AN X-RAY SPECTROSCOPE COMPRISING: A POINT X-RAY SOURCE; AN X-RAY DETECTOR ADAPTED TO TRANSMIT SELECTED RAYS OF A CERTAIN WAVELENGTH; AT LEAST ONE SINGLE CRYSTAL MEMBER IN THE FORM OF A HOLLOW CYLINDER FOR REFLECTING X-RAYS HAVING A CYLINDRICAL INNER SURFACE, WHICH IS DISPOSED BETWEEN, COAXIALLY WITH, AND ON THE COMMON AXIS WITH THE SAID POINT X-RAY SOURCE AND THE DETECTOR AND HAS PARALLEL LATTICE PLANES OF CONCENTRIC CYLINDRICAL SURFACE FORM WITH A STRAIGHT LINE CONNECTING THE SAID POINT X-RAY SOURCE AND THE DETECTOR AS ITS AXIS; AT LEAST ONE SHIELDING PLATE ADAPTED TO ARREST X-RAYS TRAVELLING IN A DIRECT STRAIGHT LINE FROM THE SAID SOURCE, THROUGH THE HOLLOW PART OF THE SAID SINGLE CRYSTAL MEMBER, TOWARD SAID DETECTOR; AND MEANS FOR RENDERING RELATIVELY SHIFTABLE SAID SINGLE CRYSTAL MEMBER, SHIELDING PLATE AND DETECTOR WITH RESPECT TO THE POINT X-RAY SOURCE ALONG SAID AXIS LINE, WHILE MAINTAINING SAID MEMBERS AT A DEFINITE POSITION SUCH THAT THE LONGER THE WAVELENGTH OF THE X-RAY TO BE PROJECTED INTO SAID DETECTOR AND TO BE DETECTED, THE SHORTER THE LENGTH OF THE X-RAY PATH FROM THE SAID SOURCE TO THE DETECTOR.