. Electric railway journal . Fig. 11—Boston Elevated Shops Armature Coil StorageRack in Insulating Room prevents the mechanical chafing of coils under service condi-tions. Whenever the company uses an asbestos field coil it isstill invariably necessary to have the winding asbestos coils are generally used. Common practicesare followed in winding field coils and in handing 13 illustrates a device which was used in the department 655 for the straightening of shafts. It consisted of two hollowcylindrical castings 14 in. in diameter when assembled, with acentral h
. Electric railway journal . Fig. 11—Boston Elevated Shops Armature Coil StorageRack in Insulating Room prevents the mechanical chafing of coils under service condi-tions. Whenever the company uses an asbestos field coil it isstill invariably necessary to have the winding asbestos coils are generally used. Common practicesare followed in winding field coils and in handing 13 illustrates a device which was used in the department 655 for the straightening of shafts. It consisted of two hollowcylindrical castings 14 in. in diameter when assembled, with acentral hollow core 5 in. in diameter in which the shaft wasplaced. The length of the device was y1/-! in., and the thicknessof the cast-iron shell was in. Each half of the assembled. Fig. 10—Boston Elevated Shops—Winding Machine forTrack Switch and Other Coils collar is supplied with a mixture of gas and air through pipesleading to appropriate controlling valves on a post near brass leads were used beyond the Y where the twosupplies were joined, to avoid frequent breakage of hose linescarried around sharp corners, etc. The core holes were pluggedwith pipe plugs. On the inside of each half cylinder were rowsof 1/32-in. holes used as flame apertures, there being a total of96 in the complete collar. The device was set on a metal plateacross the bed of a lathe for convenience, the gas and air beingserved through J^-in. pipes on each side. A latch was providedto hold the halves together in service. In operation the shaftwas placed inside the collar and the jets lighted, the shaft be-ing left by itself until red hot. Special points were used in thelathe to hold the shaft in position, and to save injury to theregular pointers. Shafts were formerly bent in c
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