. American engineer and railroad journal . ustment of the length of the spindles beingmade by a quick turn or thrust of the spindle, which isknurled at the operating end. Locking is effected by meansof a lever stop at the side of the spindle. The head of theplug is held by dogs. The barrel of a cock may be held rigidlywithin its holder if desired, but generally a little play isallowable. The action of alternately forcing the plug into thebarrel for grinding and withdrawing it is accomplished bycams and counterweights, the barrel being forced on by thecounterweights and withdrawn by the cams. T
. American engineer and railroad journal . ustment of the length of the spindles beingmade by a quick turn or thrust of the spindle, which isknurled at the operating end. Locking is effected by meansof a lever stop at the side of the spindle. The head of theplug is held by dogs. The barrel of a cock may be held rigidlywithin its holder if desired, but generally a little play isallowable. The action of alternately forcing the plug into thebarrel for grinding and withdrawing it is accomplished bycams and counterweights, the barrel being forced on by thecounterweights and withdrawn by the cams. The spindlesare operated by cut gears and a bronze cut rack, and makeseven-eighths of a turn in each direction. Any spindle may beinstantly thrown out by means of friction clutches operatedby the levers seen above the bed plate. The connecting rodis of steel, fitted with brass boxes, the bearings for the driv-ing shaft being babbitted. A pulley at the left of the drivingshaft operates the cams. In action the machine is said to AUTOMATIC COCK GRINDED. 116 AMERICAN ENGINEER AND RAILROAD JOURNAL. BRIDGEPORT MOTOR DRIVEN GRINDER. A typical motor application to a Bridgeport No. 5 toolgrinder is shown on the accompanying illustration. Themotor bracket is cast on the column of the machine. Themotor, which may be of a makesuitable to the purchaser, is backgeared to the emery wheel spindlewith a ratio of about 3 to 1. Thegears are encased and the grinderspindle bearings are self-oiling. motor is used, and the emerywheel, 36 ins. in diameter with a4-in. face, is operated at a speedof 425 The floor space oc-cupied by the machine is 30 by 47ins., and its weight complete is2,650 lbs. The motor is controlledby a starting box, but ordinarilythis is not used except at the be-ginning and end of the workingday. These machines are made bythe Bridgeport Safety EmeryWheel Company, Inc., Bridgeport,Conn. CLOSE QUARTER AIR DRILL The accompanying illustration shows a new pi
Size: 1927px × 1296px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
