Compressed air . -tion of a supporting-frame, a drill-rod mountedthereon, a rotatable bearing for the drill-rodhaving threaded connection therewith, a maingear having spline connection with the drill-rod and adapted to rotate the same, means foractuating said main gear, adjustable bearing-brackets attached to the frame, and a train ofgears mounted on said bearing-brackets andarranged to connect the main gear aforesaidwith the rotatable bearing, whereby rotationmay be imparted to said bearing, adjustmentof the bearing-brackets above mentioned beingadapted to connect or disconnect the main gearf
Compressed air . -tion of a supporting-frame, a drill-rod mountedthereon, a rotatable bearing for the drill-rodhaving threaded connection therewith, a maingear having spline connection with the drill-rod and adapted to rotate the same, means foractuating said main gear, adjustable bearing-brackets attached to the frame, and a train ofgears mounted on said bearing-brackets andarranged to connect the main gear aforesaidwith the rotatable bearing, whereby rotationmay be imparted to said bearing, adjustmentof the bearing-brackets above mentioned beingadapted to connect or disconnect the main gearfrom the rotatable bearing as described. 816,642. .Air Lock. Sinclair W. Chiles. South Bethlehem, Pa. Filed June 15. I905- Serial No. Claim.—I. In an air-lock, the combination of a movable head having an aperture for the passage of the bucket and adapted, when nioved in one direction to partiallv close the air-lock chamber, a valve member operatively connected with the head to close the aperture therein. 816,761. Hokse C<\k. IngebertJ. Thomsen. Minden, Xeb. Filed -Vug. 22,1905. Serial No. )—I. The combination with a horsecollar of pneumatic pads connected by a re-stricted air passage, and a valve controllingthe passage of air through said air passage. 816,859. Fluid Pressure Maury , Chicago, III. Filed July 6. No. 164,—I. In an automatic fluid-pressurebrake apparatus, having a movable abutment,governing the passage of pressure to the brakecylinder, and a passage for feeding pressurefrom the train pipe to the auxiliary reservoir,the combination of a separate movable flexiblediaphragm device exposed on opposite sidesto pressure from the train pipe and auxiliaryreservoir respectively, and a valve in said feedpassage actuated by movement of said dia-phragm device to open said passage when thetrain-pipe pressure exceeds that in the auxili-arv reservoir. H.\RLE Tire. Chas.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896
