. Railway master mechanic . ines represent the knuckle in an openposition, and the adjacent coupler appears in the act of af-fecting a connection, coming in contact with the fore-arm, e,of the open knuckle, causing it to rotate into a coupled posi-tion without interference in any respect with the guard arm,Q, by the heel, h, of the knuckle, which, as it will be seen,remains within the bar lugs when open. The points a, a^a^ are centers to the opposite extreme of the forward cen-ter, and Fig. 3 represents the knuckle pivoted at a; its heelis the same as that in Fig. 1, but its fore-ai-m, c, stan
. Railway master mechanic . ines represent the knuckle in an openposition, and the adjacent coupler appears in the act of af-fecting a connection, coming in contact with the fore-arm, e,of the open knuckle, causing it to rotate into a coupled posi-tion without interference in any respect with the guard arm,Q, by the heel, h, of the knuckle, which, as it will be seen,remains within the bar lugs when open. The points a, a^a^ are centers to the opposite extreme of the forward cen-ter, and Fig. 3 represents the knuckle pivoted at a; its heelis the same as that in Fig. 1, but its fore-ai-m, c, stands at anangle to the parallel line x of the bar. In the selection ofthe center, a, as the beginning of the rear extreme loca-tions serving as pivot points, it vnU be observed that theheel, h, assumes its position outside and to the right of thebar lugs, and that the guard arm is properly designed toadmit of the knuckle entering the adjacent coupler with theknuckle closed just far enough before allo\\-ing it to i-otate ! J,.. to effect the connection. If the tore-arm, c, was allowed tostrike the face of the adjacent knuckle any earlier, the re-sult would be that the knuckle would rotate too soon, whichwould cause the nose of the jaw to strike the nose of the FKHKirAEY, 1S91 THE RAILVVTAY MASTER MECHANIC 31 opix)site jaw and at the same time iwnnit the heel, h, tostrike the guard arm, G, and form a dead lock, insWad ofaffecting the comiection; hence the heel, h, thus formed,will admit of the couplers performiug their work when theknuckle ami conforms to the construction shown, and not . h^g. • diagram shows the knuckle pivoted without the clearance rcfeiTed to, which naturally compelsthe one jaw to rotate about the nose of the adjacent coupler scinbed in the paper in Mi 1 -m, in whi candidly tells the trutli i MiottheM OTUplei-s and lines, li ^^,. -, . ■! ■ ,,■ mv intelliee)
Size: 1746px × 1431px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookidr, booksubjectrailroadcars
