Appleton's dictionary of machines, mechanics, engine-work, and engineering . 3Z. to a bearing by some other means before the bolts are inserted. When keys are made use of, theyshould be of very hard wood, having a curled grain, which resists the insertion of the fibres opposedto it To prevent lateral movement cogging is adopted, in addition to the ordinary method, and a smalltenon or cog is left upon a portion of the scarf, which enters into a notch prepared in the piece which isto cover it, as shown in Figs. 2448 to 2452. Beams intended to resist cross-strains require to be lengthenedmore fre
Appleton's dictionary of machines, mechanics, engine-work, and engineering . 3Z. to a bearing by some other means before the bolts are inserted. When keys are made use of, theyshould be of very hard wood, having a curled grain, which resists the insertion of the fibres opposedto it To prevent lateral movement cogging is adopted, in addition to the ordinary method, and a smalltenon or cog is left upon a portion of the scarf, which enters into a notch prepared in the piece which isto cover it, as shown in Figs. 2448 to 2452. Beams intended to resist cross-strains require to be lengthenedmore frequently than any others, and, from the nature of the strain, a different form of scarf must bemade use of from that which is required for a strain in the direction of its length. When timber issubjected to both strains, the cross-strain is that which demands the greatest attention. Where a flooris supported, the scarfing requires to be further secured by iron bolts, made to pass through a longi-tudinal piece laid to cover the under side of the joint. | Bearing-posts, when use
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
