Moving coil electromechanical drive means for a mossbauer effect velocity spectrometer

Claim 1

IN APPARATUS FOR DETECTING NUCLEAR RESONANT ABSORPTION OF RADIATION PASSING THROUGH A MATERIAL CONTAINING THE ABSORBING NUCLEI, SAID APPARATUS HAVING DRIVE MEANS COMPRISING, A HOUSING, A PAIR OF MAGNETIC MEANS SECURED WITHIN THE HOUSING IN SPACED RELATION WITH EACH OTHER, THE COMBINATION OF THE HOUSING WITH THE PAIR OF SPACED MAGNETIC MEANS FORMING A CHAMBER THEREBETWEEN, EACH OF THE MAGNETIC MEANS HAVING A RADIAL AIR GAP THEREIN, THE HOUSING AND MAGNETIC MEANS HAVING A PASSAGE EXTENDING LONGITUDINALLY THERETHROUGH CONCENTRIC WITH THE RADIAL AIR GAPS, AND A PAIR OF RESILIENT METALLIC SUPPORT MEMBERS SECURED AT OPPOSITE ENDS OF THE HOUSING ADJACENT AND SPACED FROM THE ENDS OF THE LONGITUDINAL PASSAGE, EACH OF THE RESILIENT SUPPORT MEMBERS HAVING A HOLE THERETHROUGH CONCENTRICALLY ALIGNED WITH THE PASSAGE, THE IMPROVEMENT CONSISTING OF AN ELECTROMECHANICAL TRANSDUCER COMPRISING, AN ELONGATED METALLIC SHAFT EXTENDING THROUGH THE PASSAGE WITH ITS ENDS SLIDABLY SECURED IN THE HOLES THROUGH THE SUPPORT MEMBERS AND WITH THE SHAFT MOUNTED IN SPACED RELATION TO THE SURFACES OF THE MAGNETIC MEANS AND THE SURFACES OF THE HOUSING, METALLIC COIL MOUNTING MEANS COMPRISING A DRIVE COIL CUP AND A PICKUP COIL CUP INTEGRAL WITH THE SHAFT AND SPACED FROM EACH OTHER WITHIN THE CHAMBER BETWEEN THE MAGNETIC MEANS, EACH OF THE COIL CUPS COMPRISING A TUBULAR SIDE WALL SURROUNDING THE SHAFT AND HAVING, AT THE END OF EACH COIL CUP THAT IS ADJACENT THE OTHER COIL CUP, A CLOSURE INTEGRAL WITH THE SHAFT, EACH OF THE COIL CUPS HAVING ITS OPEN END EXTENDING INTO THE AIR GAP OF THE ADJACENT MAGNETIC MEANS WITH THE SURFACES OF THE COIL CUP SPACED FROM THE SURFACES OF THE MAGNETIC MEANS, A CIRCUMFERENTIAL COIL CHANNEL CUT IN THE OUTER SURFACE OF THE SIDE WALL OF EACH COIL CUP IN THE PORTION THEREOF WITHIN THE AIR GAP, ELECTRICAL DRIVE CONNECTING MEANS INTEGRAL WITH THE SIDE WALL OF THE DRIVE COIL CUP NEAR THE CLOSED END THEREOF WITHIN THE CHAMBER, ELECTRICAL PICKUP CONNECTING MEANS INTEGRAL WITH THE SIDE WALL OF THE PICKUP COIL NEAR THE CLOSED END THEREOF WITHIN THE CHAMBER, A DRIVE COIL MOUNTED ON THE CHANNEL OF THE DRIVE COIL CUP WITH THE ENDS OF THE COIL WIRES SECURED TO THE ELECTRICAL DRIVE CONNECTING MEANS, A PICKUP COIL MOUNTED IN THE CHANNEL OF THE PICKUP COIL CUP WITH THE ENDS OF THE COIL WIRES CONNECTED TO THE ELECTRICAL PICKUP CONNECTING MEANS, EACH OF THE COILS AND CHANNELS BEING CONSTRUCTED AND ARRANGED SUCH THAT THE OUTER RADIUS OF THE COIL MEASURED FROM THE LONGITUDINAL AXIS OF THE SHAFT IS NOT GREATER THAN THE OUTER RADIUS OF THE SIDE WALL OF THE COIL CUP MEASURED FROM THE LONGITUDINAL AXIS OF THE SHAFT, AND EACH OF THE DRIVE COIL CUP AND THE PICKUP COIL CUP HAVING CONDUIT MEANS EXTENDING FROM THE OPEN END THEREOF TOWARD THE ELECTRICAL CONNECTING MEANS NEAR THE CLOSED END THEREOF, SAID CONDUIT MEANS BEING CONSTRUCTED AND ARRANGED SUCH THAT THE COIL LEADS EXTENDING FROM EACH COIL TOWARD ITS ASSOCIATED ELECTRICAL CONNECTING MEANS ARE BELOW THE OUTER SURFACE OF THE COIL CUP SIDE WALL OVER THAT PORTION OF THE SIDE WALL THAT IS INTERPOSED IN THE AIR GAP.