. Electrical world. bright outlook, on the state of the in-dustry. ELECTRICAL WORLD and ENGINEER. Vol. XLIIL No. 5. Milling Machine for Brass Trolley Wire Hangers. The accompanying illustration shows a milling machine made bythe Garvin Machine Company for the rapid milling of brass trolley-wire hangers. It is fitted with power quick-return and automaticstop-motion. The machine is driven by a 5-in. belt, and the feeddriven from the countershaft by a 24-in. pulley. The feed isdirect through bevel and spur gears to a large steel screw or wormrunning in oil and meshing into a spiral rack or sectio
. Electrical world. bright outlook, on the state of the in-dustry. ELECTRICAL WORLD and ENGINEER. Vol. XLIIL No. 5. Milling Machine for Brass Trolley Wire Hangers. The accompanying illustration shows a milling machine made bythe Garvin Machine Company for the rapid milling of brass trolley-wire hangers. It is fitted with power quick-return and automaticstop-motion. The machine is driven by a 5-in. belt, and the feeddriven from the countershaft by a 24-in. pulley. The feed isdirect through bevel and spur gears to a large steel screw or wormrunning in oil and meshing into a spiral rack or section of nutcut out of the solid on the under side of the table. The hand-feed of the table is by hand wheel shown on front ofsaddle. This wheel is clutched so that it is not affected by therapid rotation of the quick-return. Changes of feed are providedby change gears seen on front of saddle. The feed stops at the end of the cut by automatic shifting of feedbelt, and the work is taken out and quick-return thrown in by. MILLING M.\CHINE. treadle action. The machine is controlled from either provision is made to check all over-run. A long saddle is provided and supported by a very wide fiat-topknee. The saddle is adjusted in and out by stop-nuts and bolteddown on the knee by four bolts with swing handles, as shown. Thevertical adjusting screw does not pass through the floor. The re-verse is operated both by automatic trips and by hand or footfrom either side of the machine. The cutter used is about 5 in. indiameter. In operation, the trolley hangers are held in a specialfixture, and the chips flying up from the cutter are caught by anexhaust pipe and thrown into a barrel. Two fiour barrels of chipsper day gives a fair idea of the chip-removing capacity of the ma-chine. A still further benefit of the exhaust, in addition to theremoval of chips, is that it circulates air to the cutters and keepsthem cool. The length of tiie automatic feed is 50 in., and the in-and-outadju
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
