. American engineer and railroad journal . its form and theuRthod of securing the strap in it. The base is turned circularand the chuck is first approximately centered on the bed of aDoring mill. A strap is then put in and accurately centered andsecured by the set screws. When it is to be removed the se!btrews on one side only are released and the next strap can beput in and tightened without further calipering. On new work a roughing cut is first taken and then the finishing tool shown in the center is run in and cleans up the cut,bri;/:j;;g it to the required diameter. On repair work the fin
. American engineer and railroad journal . its form and theuRthod of securing the strap in it. The base is turned circularand the chuck is first approximately centered on the bed of aDoring mill. A strap is then put in and accurately centered andsecured by the set screws. When it is to be removed the se!btrews on one side only are released and the next strap can beput in and tightened without further calipering. On new work a roughing cut is first taken and then the finishing tool shown in the center is run in and cleans up the cut,bri;/:j;;g it to the required diameter. On repair work the finish-ing iool only is usually required. Diflfcrent sized chucks af provided for the various classesof straps. SIMPLE PIPE BENDER. On one of the columns between the machine and erecting shopat Readville is secured a 14 inch air brake cylinder on the pistonof which is a block secured to a simple cross head sliding on aguide secured to the post just back of it. Below this cylinderare two arms pivoted at the floor, the top of which are forked. DETAIL OF CHUCK FOR TURNING ECCENTRIC STRAPS. VIEW SHOWING A HOME MADE PIPE BENDING MACHINE. THE ARMSHINGED BELOW CAN BE SWUNG APART SO AS TO GET PR.\CTIC.\LLYANY RADIUS BEND REQUIRED. THE MACHINE AT THE LEFTIS AN AIR OPER.^TED PIPE THREADER, WHICH IS LUBRI-CATED CV A HOME MADE SIPHON OPERATED BY AIR. and carry rollers. These arms are held in any desired positionby pins in a frame that passes through them. In bending a pipe any desired radius can be obtained by swing-ing the arms apart or together. They are quickly adjusted andthe cylinder is of sufficient size to bend all pipes required on alocomotive. A gauge is mounted on top of the cylinder and alocomotive equalizing reservoir is fitted in the air line leadingto it. Alongside of this pipe bender is a pipe threading machine,mounted on a simple tripod of pipe and fittings, which is driventhrough gearing from an air motor. Underneath the threaderis ^shelf that carries a specially shaped pan,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
