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 774
may be expanded.The feed-bar is not pivoted at one end as is usual, but has a spring-seat, so that it may be raisedparallel to the bottom of the presser-foot. The shuttle has an open end, with the bobbin restingupon the shuttle-carrier. The use of a head-piece is thus obviated, and by this means it… … ing of the bobbin. The tension-bracket, having a locking seat, presents a parallel surface to thetension-spring in all positions. The lifter has a triple cam, so that it may be adjusted to raise thepresser-foot for ordinary work, and the foot-hemmer into position for receiving cloth for hemming,…
Mechanical engineering -- Dictionaries
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