. The Street railway journal . Street FIG. L—SECTIONS OF COMMUTATOR CLAMP been made, which rests and is bolted on the tool carriage of thelathe. The bearing shell is clamped into the middle of thisframe. On each side of the bearing shell is a bearing of theright size for a i^-in. shaft. These two bearings have passedthrough them a boring bar, which is a piece of ij^-in. shafting,with a boring tool mounted on a slot in it, and which is rotatedin its bearings by a lathe-dog driven from the face plate of thelathe. As the boring bar is fixed in bearings w^hich are in line with the newly
. The Street railway journal . Street FIG. L—SECTIONS OF COMMUTATOR CLAMP been made, which rests and is bolted on the tool carriage of thelathe. The bearing shell is clamped into the middle of thisframe. On each side of the bearing shell is a bearing of theright size for a i^-in. shaft. These two bearings have passedthrough them a boring bar, which is a piece of ij^-in. shafting,with a boring tool mounted on a slot in it, and which is rotatedin its bearings by a lathe-dog driven from the face plate of thelathe. As the boring bar is fixed in bearings w^hich are in line with the newly-babbitted shell, and as this has been clamped into be bored out, there is no delay in getting the shell FIG. 2.^PLAN OF SECTIONAL CLAMP FOR COMMUTATOR The sul>station at Macatawa Park adjoins the repair shops,and the sub-station attendant is also the armature winder. Thereis sufiicient extra room in the sub-station for him to carryon hiswork. Thus an economy is practiced which lias been frequentlytalked of in connection with sub-station attendance, but whichis perhaps not found as often as was anticipated when distri-bution from sub-stations was first proposed. For assembling commutators Mr. Hardy has made a sectionalclamp, which is shown assembled in Fig. 2, and one of the sec-tions with sizes is also shown in Fig. i. The various sections,which are of cast-iron, dovetail into each other. When placedaround a commutator a steel ring with set screws is put aroundit, and the set screws are brought down onto each segment ofthe clamp. A similar arrangement has been for some time employedby W. W. Annable, master mechanic of the Grand RapidsRailway Company, except that the sections in Mr. A
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
