. Railway mechanical engineer . work by a spin of the wheel. The principle of operation is that of differential pinionsoperating with internal gears. The hand wheel carries fivedouble pinions meshing with the backing gear and an in-ternal gear of different pitch diameter than the backinggear. When the hand wheel is revolved the scroll rotatesin the cJiuck with a powerful gear multiplication on accountof the differential action due to this difference in pitchdiameters. With the gear ratio as regularly furnished, onerevolution of the hand wheel causes the jaws to move 1/32in. radially, opening t
. Railway mechanical engineer . work by a spin of the wheel. The principle of operation is that of differential pinionsoperating with internal gears. The hand wheel carries fivedouble pinions meshing with the backing gear and an in-ternal gear of different pitch diameter than the backinggear. When the hand wheel is revolved the scroll rotatesin the cJiuck with a powerful gear multiplication on accountof the differential action due to this difference in pitchdiameters. With the gear ratio as regularly furnished, onerevolution of the hand wheel causes the jaws to move 1/32in. radially, opening the chuck approximately 1/16 in. di-ameter. An important feature is the device for locking and re-leasing the chuck. By allowing the backing gear a slight rotation on the pins which hold it to the body, a lost motionis imparted to the hand wheel. This lost motion furnishesa hammer action multiplying many times on the scroll theactual pressure applied to the hand wheel. The lever L which is bolted to the machine, carries a fric-. Horton DifferentI Chuck Designed to Speed Up Lathe and OtherChucking Work tion shoe acting on the inside of the hand wheel. This isused, when power operation is desired, to hold the handwheel stationary while the chuck revolves, thus affordinggreat gripping power. Bali-Bearing Hanger Box and Pillow Block RECENT additions to the line of ball bearing hangerboxes and pillow blocks, made by the Fafnir BearingCompany, New Britain, Conn., are the single ball bear-ing hanger box and self-alining, double ball bearing pillowblock, illustrated. The former is similar in construction tothe double ball bearing hanger box described in detail on
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
