. Electric railway journal . er this treatment the coilis thoroughly baked in the oven. Standard instruction prints 5^4 m- x 4JA in- m size havelong been used in these shops to aid the shopmen in makingthe proper connections of motors, setting of brushes, wiring and brush-setting diagrams for National andWestinghouse compressors reproduced herewith have re-cently been added to the album of instruction prints. SHOP ECONOMIES An interesting piece of axle welding has recently beencarried out in the blacksmith shop, where two pony axleshave been made out of three old motor axles by cutting
. Electric railway journal . er this treatment the coilis thoroughly baked in the oven. Standard instruction prints 5^4 m- x 4JA in- m size havelong been used in these shops to aid the shopmen in makingthe proper connections of motors, setting of brushes, wiring and brush-setting diagrams for National andWestinghouse compressors reproduced herewith have re-cently been added to the album of instruction prints. SHOP ECONOMIES An interesting piece of axle welding has recently beencarried out in the blacksmith shop, where two pony axleshave been made out of three old motor axles by cutting off the journals and welding in a new piece which is longenough to extend the pony axle to the proper length. Suchrewelded axles have been found of ample strength for usewith pony wheels. Including overhead charges, they costbut $4 each against $12 for new axles. One of the illustrations shows a reversible emerygrinder which was reconstructed to grind valves at one endof the shaft and drain cocks at the other end. The prin-. itoctfrw: Ry. Journal Baltimore Shops—Connections for Compressor Motors cipal changes required to adapt the grinder for this pur-pose were the installation of a new shaft and of a mandrelfor holding the valves. The valves are principally of therotary type, but slide valves can also be ground on thesemachines, although they require a little hand finishing. Two other illustrations show how a planer and shaperare used for making wheelguard fingers. The first step isto place the original stock, consisting of 35-in. bars of , between guide pieces or blocks upon the bed ofthe planer to bend them into long Us, as pieces are then placed in the shaper for two addi-tional bendings. The first bend is made along the sides ofthe U by means of an old car axle which has been in-dented for this purpose. The ends of the fingers are turnedup through the same movement of the machine after theyhave been anchored in the two ^-in. holes of the
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