. The car builders' dictionary; an illustrated vocabulary of terms which designate American railroad cars, their parts, attachments, and details of construction, with definitions and illustrations of typical British practice in car construction. Six thousand three hundred and forty-four illustrations. 1906 ed. Comp. for the Master car builders' association . age for determining the num-ber of threads to the inch on screws and taps. It consists of a number of toothed plates turning on acommon pivot, so that the serrated edge of eachmay be applied to the screw until one is foundwhich corresponds
. The car builders' dictionary; an illustrated vocabulary of terms which designate American railroad cars, their parts, attachments, and details of construction, with definitions and illustrations of typical British practice in car construction. Six thousand three hundred and forty-four illustrations. 1906 ed. Comp. for the Master car builders' association . age for determining the num-ber of threads to the inch on screws and taps. It consists of a number of toothed plates turning on acommon pivot, so that the serrated edge of eachmay be applied to the screw until one is foundwhich corresponds therewith. The figures stampedon the plate indicate the number of threads to theinch. — Knight. In the ordinary single threadscrew the pitch is indicated by the number ofthreads to an Thread. The groove, or the material betweenthe grooves, which is cut on the outside surface ofa cylinder to form a male screw, or on the insidesurface of a cylindrical hole to form a nut or femalescrew. Metal Screw Threads and Wood ScrewThreads, which see. are of different form. PipeScrew Threads, which see, are usually V-shaped,but all other threads in common use for ordinarypurposes are made by the Whitworth or Sellersstandard screw threads, the former being the Euro-pean and the latter the American standard. At the if. C. B. Convention, 1882, it was Re-. Flo. 13. >~-60-„ --RE-iC r / f f JVVSSS-S Fig. 15. b Fio. 14. -::::::::fe ■~--Mm -J^^<f ~M a. -- ■ —- solved that this Association deprecates the use ofscrews larger or smaller in diameter by a smallfraction of an inch than the sizes specified for theSellers or Franklin Institute system, and that allthe members of the Association are urged to aban-don entirely the use of over or undersize Sellers or Franklin Institute system of screw,threads, bolt heads and nuts is the standard of theAssociation, and repeated action of the Associationhas deprecated the use of any other system, and en-couraged the c
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