Gas sampling probe

Claim 1

A PROBE FOR WITHDRAWAL OF GASES FROM A DUST-LADENED ATMOSPHERE COMPRISING AN END CAP OF SUBSTANTIALY THICKNESS, SAID END CAP HAVING A RECESS IN THE FORM OF A FRUSTUM OF A CONE WITH THE LARGER DIAMETER OF SAID RECESS AT THE SURFACE OF THE END CAP AND THE SMALLER DIAMETER OF SAID RECESS LOCATED INWARDLY OF SAID SURFACE, A GAS PASSAGEWAY EXTENDING THROUGH SAID END CAP AND HAVING A DIAMETER LESS THAN SAID LARGER DIAMETER AND DISPOSED FOR MERGING RELATIONSHIP WITH SAID CONE ON ONE SIDE THEREOF RELATIVE TO SAID SMALLER DIAMETER, WHEREBY THERE IS FORMED A WIDE MOUNTED OPENING TO SAID GAS PASSAGE, SAID WIDE MOUTH OPENING BEING CHARACTERIZED BY ONE PORTION IN THE SHAPE OF SAID FRUSTUM OF A CONE AND ANOTHER PORTION BY THE CYLINDDRICAL WALLS OF SAID GAS PASSAGEWAY, SAID END CAP HAVING RADIALLY THEREOF A FLUID-DIRECTING PASSAGEWAY, SAID FLUIDDIRECTING PASSAGE BEING IN SPACED RELATION TO THE CYLINDRICAL SURFACE OF SAID GAS PASSAGEWAY AND BETWEEN SAID LARGER AND SMALLER DIAMETERS OF SAID FRUSTUM OF SAID CONE, AND A CONNECTION TO SAID FLUID-DIRECTING PASSAGE FOR SUPPLY OF WASH WATER THERETO UNDER PRESSURE FOR PRODUCING A STREAM OF WASH WATER DIRECTED RADIALLY ACROSS SAID FRUSTUM OF A CONE AND AGAINST SAID CYLINDRICAL SURFACE OF SAID GAS PASSAGEWAY, SAID CYLINDIRCAL SURFACE REDIRECTING SAID STREAM OF WASH WATER TO PRODUCE A WIDESPREAD SPRAY CONSISTING OF SMALL DROPLETS OF LIQUID, WHEREBY THE EXPOSED SURFACES OF SAID GAS PASSAGEWAY ARE MAINTAINED WET AND SAID SPRAY IS EFFECTIVE IN PREVENTING ACCUMULATION OF DUST PARTICLES IN AND ABOUT SAID WIDE-MOUTH OPENING AND IN AND ABOUT SAID GAS PASSAGEWAY.