. American engineer and railroad journal . tiEAKEU DKIVE UPON AN 84-IN. BORING MILL, BUILT FOB THE PENKSLVANI THE BB;TTS machine INDUCTION MOTOB (CONSTANT SPEED).—WESTINGIIOUSE ELECTRIC TUBING COMPANY. RAILROAD BY AND MANUFAC-. GEARED DBIVE UPON A 51-IN. BOBINO MILL. NILES TOOL WORKS. MULTIPLE-VOLTAGE MOTOE.—^BULLOCK ELECTBIO AND MANUFACTDBING COMPANY by a lever which operates a clutch to (;onnect the drive director lo throw it ihroiigh the gearing. ThuH a speed range ofS to 1 is most easily oljtainabie in small increments, in amanner most advantageous for the service. A power
. American engineer and railroad journal . tiEAKEU DKIVE UPON AN 84-IN. BORING MILL, BUILT FOB THE PENKSLVANI THE BB;TTS machine INDUCTION MOTOB (CONSTANT SPEED).—WESTINGIIOUSE ELECTRIC TUBING COMPANY. RAILROAD BY AND MANUFAC-. GEARED DBIVE UPON A 51-IN. BOBINO MILL. NILES TOOL WORKS. MULTIPLE-VOLTAGE MOTOE.—^BULLOCK ELECTBIO AND MANUFACTDBING COMPANY by a lever which operates a clutch to (;onnect the drive director lo throw it ihroiigh the gearing. ThuH a speed range ofS to 1 is most easily oljtainabie in small increments, in amanner most advantageous for the service. A power attach-ment for raising and lowering the cross-rail is also included,the drive being oblained by belling from the driving shaft tothe pulley on top of the machine; in this way the cr^ss-railmay be raised while the face-plate is at rest. Positive-drivegeared feeds are also used upon this tool, the drive tor whichis taken direct from the spindle by spiral gearing. On page 244 is illustrated one of the most recent arrange-ments for motor driving, which has been devised by the Dul-lard Machine Tool Company, Bridgeport. Conn. The ntachinehere shown is the .37-in. Bullard boring mill, of the same typethat was inslalled al the Collinwood sh
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
