. Railway mechanical engineer . Stevenson Permanent Nut Lock. deeper at the point of the bolt and gradually lessening indepth. The washer used has tw-o inner extending lugs tofit the grooves on the Ijolt. The nut has recesses on threeof its outer edges to receive the upset portion of the outerrim of the w-asher after the nut has been tightened. Tlie construction indicated insures the easy applicationof the washer to the bolt Ijefore applying the nut, as the. Brooks Twist-Lock Car Seal breaking the wire. To unlock the seal this loop is simplyuntwisted and the nicked side of the wire is thereby
. Railway mechanical engineer . Stevenson Permanent Nut Lock. deeper at the point of the bolt and gradually lessening indepth. The washer used has tw-o inner extending lugs tofit the grooves on the Ijolt. The nut has recesses on threeof its outer edges to receive the upset portion of the outerrim of the w-asher after the nut has been tightened. Tlie construction indicated insures the easy applicationof the washer to the bolt Ijefore applying the nut, as the. Brooks Twist-Lock Car Seal breaking the wire. To unlock the seal this loop is simplyuntwisted and the nicked side of the wire is thereby broughtinto tension, which insures that the seal cannot be unlockedwithout breaking. A similar series of nicks is placed on theback side of the horizontal portion of the seal to prevent tliepossibility of successfully tampering with the seal should anattempt be made to lock it by twisting the horizontal portionof the wire about the vertical. This seal has been in use on one of the eastern railroadsfor some time. washer lugs do not begin to touch the base of the grooveson the bolt until the washer has passed on to the bolt aboutone-half the length of the tapered portion. When the washeris finally forced up against the work, it binds in the baseof the grooves without engaging the threads. When the nuthas been tightened sufficiently it is securely locked in posi-tion by upsetting the outer rim of the washer into one ofthe recesses on the nut. The nut ma
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
