Barrows, F. W. (Frank Wilson), b. 1853 · New York, N.W. Henley Pub. Co. · leaf 202
to put on the thread as we did the coreprint on chain-drum. It may be worked in the same way, too, being careful tokeep it up to size, and after it is all on put the pattern in PATTERNS FOR SCREWS. 201 the lathe, make a block to fit the space between two adja-cent threads and reaching across the… … Fig. 91. it may be made by a core; in either case, I should makethe thread in sections, and fasten on the surface of patternor core-box. In all these core-boxes having a thread on their surfaceyou must be particular to make a good match at the part-ing. This is best done by using good dowels and…
Patternmaking
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