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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 780

An illustration from Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts, 1880, leaf 780 — ends. Thusthe buttonhole is automatically worked on both sides and barred at both ends without handling orstopping the machine. The quality or closeness of the stitches can be changed by moving the screwshown, which works in the feed-arm, thereby giving more or less motion to the feed-lever and… … connecting the two levers, which connect the follower in the switch-cam with the sliding plate. Thelength of buttonhole is varied as desired by the connection of the pitman with the slotted feed-disk.Moving this connection to the outer surface gives a longer buttonhole, and toward the centre a…

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