Means for obtaining samples from placer formation

Claim 1

APPARATUS FOR OBTAINING SAMPLES FROM PLACER FORMATION IN THE GROUND, COMPRISING: (A) A PLURALITY OF CYLINDRICAL CASINGS CONNECTED TOGETHER IN LONGITUDINAL ALIGNMENT, INCLUDING A CYLINDRICAL BIT AT ONE END OF SAID CASINGS AND A DRIVE ASSAMBLY AT THE OPPOSITE END THEREOF AND AT LEAST ONE INTERMEDIATE SECCTION; (B) SAID INTERMEDIATE SECTION CCOMPRRISING AN INNER CYLINDRICAL CASING AND AN OUTER CYLINDRICAL CASING RIGIDLY CONNECTED TOGETHER IN CONCENTRIC SPACED RELATION PROVIDING AN ANNULAR PASSAGEWAY BETWEEN THEM EXTENDING FROM END TO END THEREOF, AND SAID INNER AND OUTER CASINGS BEING SUBSTANTIALLY COTERMINOUS AT THEIR OPPOSITE ENDS; (C) SAID DRIVE ASSEMBLY COMPRISING AN EXTENSION CASING COAXIAL WITH AND IN LONGITUDINAL EXTENSION OF SAID INNER CASING; (D) A DRIVING WEIGGHT RECIPROCABLY SUPPORTED ON SAID EXTENSION CASING AND AN ANNULAR ANVIL COAXIAL WITH SAID EXTENSION CASING AND SAID CASING PIPE ADAPTED TO BE IMPACTED BY SAID DRIVING WEIGHT UPON SAID RECIPROCATION OF THE LATTER; (E) MEANS ON SAID ANVIL CONNECTING SAID OUTER CASING WITH SAID ANVIL AND CONNECTING SAID INNER CASING WITH SAID EXTENSION CASING; (F) SAID MEANS BEING A CYLINDRICAL OUTER MEMBER IN EXTENSION OF SAID OUTER CASING COAXIAL WITH SAID ANVIL; (G) SAID ANVIL EXTENDING ACROSS SAID SPACE BETWEEN SAID EXTENSION CASING AND SAID CYLINDRICAL OUTER MEEMBER CLOSING THE UPPER END OF SAID ANNULARR PASSAGEWAY; (H) SAID OUTER CYLINDRICAL MEMBER BEING FORMED WITH AN INLET FOR ADMITTING WATER UNDER PRESSURE INTO SAID ANNULAR PASSAGEWAY;