. Railway mechanical engineer . ordered and fired up andthen not used, a report should be made to the proper offi-cers. Thousands of tons of coal have been wasted due toengines being ordered and then the order cancelled. Forthe protection of the enginehouse force, three hours timeshould be required to prepare an engine when it is orderedfor a run not shown on the schedule. The order shouldbe in writing, and, if taken over the telephone, it should beconfirmed in writing. BABBITTING CROSSHEADS BY H. C. GILLESPIE Master Mechanic, Chesapeake & Ohio, Peru, Indiana The accompanying drawing shows a j
. Railway mechanical engineer . ordered and fired up andthen not used, a report should be made to the proper offi-cers. Thousands of tons of coal have been wasted due toengines being ordered and then the order cancelled. Forthe protection of the enginehouse force, three hours timeshould be required to prepare an engine when it is orderedfor a run not shown on the schedule. The order shouldbe in writing, and, if taken over the telephone, it should beconfirmed in writing. BABBITTING CROSSHEADS BY H. C. GILLESPIE Master Mechanic, Chesapeake & Ohio, Peru, Indiana The accompanying drawing shows a jig which is used tobabbitt the guide bearings of crossheads. It consists of aframe to the top of which is attached a crossbar and in theends of which are provided V-bearings for the ends of themandrel on which the crosshead is mounted. This is pro-vided with a taper fit, the taper being the same as that ofthe crossheads, which facilitates mounting the latter andmakes it only necessary to square the crossheads with the i ■. Mandrel and Jig for Babbitting Crossheads base of the jig after the mandrel has been placed on its bear-ings. To the crossbar is attached a shoe which has beenplaned to the proper size for the guides of the engine classon which the work is being done. The height of the cross-bar may be varied as required. By the use of this jig a cross-head can be finished ready for the engine in about one is ready for application as soon as the babbitting is done,no machine work being required. PREVENTION OF BOILER CORROSIONBY ELECTRICITY The method of preventing boiler corrosion, known as theCumberland system, is being tried by the British system is based on the electrolytic theory of corrosionand makes use of suitable iron plates placed within the boilerand insulated from it These plates are connected to thepositive terminal of a low tension generator, the boiler shellitself forming the negative terminal. The corrosion and pit-ting caused by local
Size: 2124px × 1176px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
