Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 409
etimes drilled throughthe screwed parts. The screwed stays for locomotive boilers are usually placedabout 4 inches apart, centre to centre, and vary in diameter from f inch to 1inch. In marine boilers the screwed stays are made of steel, and they vary indiameter from 1^ inch to l-f inch. They are… … Fie. 923. In the steel-screwed stays the ends of these staysare drilled as shown, and after they are screwed intoplace a steel drift is driven into the holes by slightblows to expand the ends tightly into the plates tomake steam-tight joints. Fig. 923 is a gusset stay, used in angles, consist-ing…
Mechanical drawing
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