. Railway mechanical engineer . , a l/i-m. tapered rivet was putthrough each to hold it against the possibility of working or gage points 13 also are made of hardened toolsteel, held in the drop forged arms 4 and forming the outsidecalipers. Contact points 13 are threaded and adjustable inor out, being held firmly in any desired position by meansof the Vis-in. machine screws shown. Before proceeding to use this gage it is absolutely essentialthat contact points 13 be adjusted until the distance betweenthem is exactly equal to the distance between contact points12. Should it be desi
. Railway mechanical engineer . , a l/i-m. tapered rivet was putthrough each to hold it against the possibility of working or gage points 13 also are made of hardened toolsteel, held in the drop forged arms 4 and forming the outsidecalipers. Contact points 13 are threaded and adjustable inor out, being held firmly in any desired position by meansof the Vis-in. machine screws shown. Before proceeding to use this gage it is absolutely essentialthat contact points 13 be adjusted until the distance betweenthem is exactly equal to the distance between contact points12. Should it be desired to bore a driving wheel tire forapplication to a wheel center and making the necessaryallowance for shrinkage, the wheel center will first be cali-pered, using contact points 13. With thumb screws 8 and 9loose, the gage is adjusted to the approximate diameter ofthe wheel center. Tightening thumb screw 8, adjustmentscan be made by turning nut 11 and fine adjustments byturning the micrometer sleeve. This will give the correct. ■ 12-^ o o+——-*—i i—•£ ° r *—i r- Inside and Outside Driving Wheel Tire Calipers rigidly held against rocking by % in. tapered rivets inreamed holes. Parts 5 and 6 are made of brass and act simply as guidesfor the ends of parts 3 and 2 respectively, being held inplace by four J^-in. machine screws each. Part 5 is pro-vided with a gib 14, which slides along 2 and a thumbscrew 9 for tightening the gage. The lug projecting on theside opposite the thumb screw is drilled to receive the 5/16-in. threaded end of the micrometer. There are two knurled,5/16-in. nuts 10 on the end of the micrometer, a small pinpreventing danger of loosening. Part 7 is also made of brass and fits over parts 2 and 3as is perhaps best shown in section BB. The thumb screw 8is used to tighten part 7. A J^-in. slot in 7 is arranged toreceive the knurled nut 11 which turns on the J^ end of the micrometer, as shown. This Jj-in. endof the m
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
