. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 591. FOUR-SPINDLERAIL DRILL, arrangedto drill four f-inch holesat once, either in line orstaggered. The distances of the drillsare compensated by doubleuniversal joint rods. The drill spindles run insleeves adjustable on a crossbar, which slides by a handwheel gear fo
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 591. FOUR-SPINDLERAIL DRILL, arrangedto drill four f-inch holesat once, either in line orstaggered. The distances of the drillsare compensated by doubleuniversal joint rods. The drill spindles run insleeves adjustable on a crossbar, which slides by a handwheel gear for feeding thedrills. 592. CRANK-PIN TURNING MACHINE. The rig comprises es-sentially two tool carriages turning around the crank shaft, which is fixed, and it is in-dependent of anyspecial device thatmay be used forcentering the two tool car-riages are shapedas circular seg-ments and are dia-metrically oppositeeach other, pivotedat one end on atoothed crownwhich is made in two parts. This crown turns in a circular frame, alsomade of two pieces, and is driven by a pinion connected with a pulleybelted to the shafting of the shop. The circular frame is mounted on a. RAILWAY DEVICES AND APPLIANCES, ETC. 229 sliding carriage which may be moved with a screw, automatically or byhand, on the saddle S, adapted in size and shape to the lathe bed. The position of each of the tool carriages may be regulated by turningthem on their pivots, bringing them nearer or farther from the axis of theframe which coincides with that of the journal to be trued. 593. Cross section of crank pin and tools set in the tool carriagesectors. 594. EXTENSION CAR STEP. The extension step is car-ried on a forked arm which slides in guides under the lowest fixed step. The upper end ofthe arm is connected to a crankarm fixed on a shaft carried inbrackets under the top step. Onthe inside end of this shaft is atoothed wheel which engages witha similarly toothed sector fas-tened to the face of the stephanger.
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
