. Bulletin - United States National Museum. Wissenschaft. Abbildung 11.-Greenough patent Modell, 1842. (Smithsonian Foto 45525-G.) Nut in den Gängen war ein eigenartig geformten Nadel verbogen an zwei Orten zu ermöglichen, sie wird durch die Gänge und mit einem Punkt an einem Ende gehalten zu werden und das Auge auf der gegenüberliegenden Seite, wie in einem gemeinsamen hand Nadel. Die Aktion der Zahnräder verursacht das Gewebe auf und durch die gewindestange Nadel gezwungen zu werden. Unbestimmte gerade Nähte können genäht, wie das Gewebe werden kontinuierlich aus der Nadel, indem die drehende Zahnräder (Abb. gezwungen. 12). Eine Schraubzwinge hielt die Maschine auf eine Tabelle oder e8288

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. Bulletin - United States National Museum. Science. Figure 11.—Greenough's patent model, 1842. (Smithsonian photo 45525-G.) groove in the gears was a peculiarly shaped needle bent in two places to permit it to be held in place by the gears and with a point at one end and the eye at the opposite end, as in a common hand needle. The action of the gears caused the fabric to be forced onto and through the threaded needle. Indefinite straight seams could be stitched as the fabric was continuously forced off the needle by the turning gears (fig. 12). A screw clamp held the machine to a table or other work surface. Machines of this and similar types reportedly had some limited usage in the dyeing and bleaching mills, 27 where lengths of fabric were stitched together before processing. Improved versions of Bean's machine were to be patented in subsequent years in England and America. The same principle was also used in home machines two decades later. The third sewing-machine patent on record in the United States Patent Office is patent 3, 389 issued on December 27, 1843, to George H. Corliss, better remembered as the inventor and manufacturer of the Corliss steam engine. It was his interest in the sewing machine, however, that eventually directed his attention to the steam engine. Corliss had a general store at Greenwich, New York. A customer's complaint that the boots he had pur- chased split at the seams made Corliss wonder why someone had not invented a machine to sew stronger seams than hand-sewn ones. He considered the problem of sewing leather, analyzing the steps re- quired to make the saddler's stitch, one popularly used in boots and shoes. He concluded that a sewing machine to do this type of work must first perforate the leather, then draw the threads through the holes, and finally secure the stitches by pulling the threads tight. The machine Corliss invented (fig. 13) was of the same general type as Greenough's, except that two two-pointed needles were required

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