Sectional grain sampling probe

Claim 1

IN A SECTIONAL SAMPLING PROBE, COMPRISING TWO PAIRS OF COAXIAL TUBES HAVING AXIALLY SPACED LONGITUDINALLY ALIGNABLE APERTURES AND IN WHICH THE INNER TUBE OF EACH PAIR IS ROTATABLE RELATIVE TO THE RESPECTIVE OUTER TUBE, MEANS FOR UNITING SAID TWO PAIRS OF TUBES IN ENDTO-END RELATION WITH THEIR APERTURES LONGITUDINALLY ALIGNABLE INCLUDING A PAIR OF COACTING MEMBERS DISPOSED RESPECTIVELY WITHIN THE RADIUS OF THE INNER TUBES, SAID MEMBERS AT THEIR RESPECTIVE OUTER ENDS FORMED FOR AXIALLY INTERDIGITATION ONLY WHEN THE APERTURES OF THE INNER TUBES ARE SO ALIGNED TO TRANSMIT ROTARY MOTION TO THE INNER TUBES, A PAIR OF OUTER LOCKING JOINT MEMBERS DISPOSED RESPECTIVELY ON THE OUTER END SURFACES OF THE OUTER TUBES AND ADAPTED TO INTERLOCK ON RELATIVE ROTATIONAL MOVEMENT ONLY AFTER SAID INTERDIGITATION IS EFFECTED, AND ABUTMENT MEANS CARRIED BY SAID OUTER JOINT MEMBERS AND COACTING TO LIMIT THE EXTENT OF SAID RELATIVE ROTATIONAL MOVEMENT TO LONGITUDINALLY ALIGN THE APERTURES OF THE OUTER TUBES.