. American engineer and railroad journal . Fig. Staybolt. trouble has been experienced with them in common with allother locomotive boilers from the breaking of stay-bolts. It wasobserved that more stay-bolts break in steel than in iron plates,and that the tighter the bolts are screwed into the plates thelarger the number of breakages were. From this and other factsthe inference was drawn that tberigidity of the bolts had much 204 AMERICAN ENGINEER, CAR BUILDER. < Q. < zoo I- 0. O XCO < Q. O ooo z< to do with their failure. Nixon, the foreman of theboiler shop
. American engineer and railroad journal . Fig. Staybolt. trouble has been experienced with them in common with allother locomotive boilers from the breaking of stay-bolts. It wasobserved that more stay-bolts break in steel than in iron plates,and that the tighter the bolts are screwed into the plates thelarger the number of breakages were. From this and other factsthe inference was drawn that tberigidity of the bolts had much 204 AMERICAN ENGINEER, CAR BUILDER. < Q. < zoo I- 0. O XCO < Q. O ooo z< to do with their failure. Nixon, the foreman of theboiler shops, was therefore led todesign the form of attachmentshown in Fig. 1. which permits ofsome degree of flexibility in thebolt, and also provides a moresecure fastening. It consists ofa nut with a tapered thread Ifinches in diameter which isscrewed into the outside plate ofthe fire box. The hole on theinside of the nut is tapered, andruns off to nothing in thethread, which is cut in the outerend of the hole. The point offlexure of the bolt is thus dis-tributed over some distance andis not concentrated at one bolt is riveted over the out-side of the nut, as is usual, andthe inside end is screwed andriveted into the fire-box plate inthe usual way. The nuts werefirst made of brass, but are nowmade of malleable iron. Theywere first applied to boilers in1892, and they worked so satis-factorily that they have graduallybeen used more and more, andnow orders have been
Size: 1104px × 2263px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
