Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 777
v-ing increased tension on the spool 24. At 45 is the shuttle-holder, and at 15 the crank-lever whichoperates it. At 56 is shown an extra face-plate for heavy work. The shuttle, which holds about100 ft. of linen thread, is round, about 14- in. in diameter, and has a recess on the side of which is… … SEWING MACHINES. 745 purpose, is adjusted in place, and the thread is drawn up through the whirl- or looper-shaft 49, andthence through the needle-plate. The looper-shaft has an oscillating motion, and its object is to windthe thread around and upon the hook of the needle when the latter has fully…
Mechanical engineering -- Dictionaries
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