Rock Drills, Mining and Quarrying Machinery; Rock Drills, Stone Channeling Machines, Quarry Bars, Gadders, Coal Cutters

Rock Drills, Mining and Quarrying Machinery; Rock Drills, Stone Channeling Machines, Quarry Bars, Gadders, Coal Cutters

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...is wanted. Single Screw Column or Shaft Bar with Clamp, and Sergeant "Auxiliary Valve" Drill Double Screw Columns Single Screw Columns or Shaft Bars ings and enlarging, it has been found that the column is the best means of mounting rock drills. These columns are simply round, extra heavy wrought steel tubes, with a suitable claw-foot or rosette on one end, and either one or two clamping or jack screws at theother. The column is set up and the screw run out, thus jacking the column between the floor and the ceiling or between side and side of the tunnel or shaft. In shaft sinking or tunnels of small section, such as 6 ft. x 6 ft., single screw columns are generally used on which is mounted one drill by means of a special patent clamp, .which permits the drill to be adjusted so as to put in a hole at any height or angle. 4' In tunnels of larger section the double screw column is always employed, with one or two swinging arms on which IN shaft sinking and tunneling work, as in driving head Number and Name of Part Number and Name of Part 1 aw 50 Column Arm 2 Bolt and Nut 51 Column Arm Cap 3 Vasher for T Bolt 52 Column Arm Bolt 5 jaw Bolt 53 Safety Clamp 41 Column Arm Clamp--Cup Half--54 Safety Clamp Bolt Ingersoll 56 Column Base Block (2 pieces) 42 Column Arm Clamp--Cap Half---57 Base Block Bolt Ingersoll 58 jack Screw for Double Screw 43 Column Arm Clamp---Bolt Column 45 Column Arm ClampCone Half---59 ack Screw Nut for No. 58 Sergeant 60 ack Screw Cup for No. 58 46 Column Arm Clamp--Cap Half---61 ack Screw Nut for Single Screw Sergeant Column 47 Column Arm Clamp---Bolt--Ser-64 jack Screw for Single Screw geant Column 48 Column Cap 65 Base Block fcr No. 64 49 Pipe for Column 66 Base Block Screw for No.65 NO'I'E--N'hen...show more

Product details

  • Paperback | 38 pages
  • 189 x 246 x 2mm | 86g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236794893
  • 9781236794895