. Bulletin - United States National Museum. Science. Figure 66.—Jones "electro motor" patent model of 1871 on a Bartlett sewing machine. (Smithsonian photo P-63104.) sewing machines did not become common until the 20th century, several 19th-century inventors con- sidered the possibility of attaching a type of motor to the machine. One was the 1871 patent of Solomon Jones, who added an "electro motor" to an 1865 Bartlett machine (fig. 66). The attachments that were developed during the latter part of the 19th century numbered in the thousands; many of these were superfluous.
. Bulletin - United States National Museum. Science. Figure 66.—Jones "electro motor" patent model of 1871 on a Bartlett sewing machine. (Smithsonian photo P-63104.) sewing machines did not become common until the 20th century, several 19th-century inventors con- sidered the possibility of attaching a type of motor to the machine. One was the 1871 patent of Solomon Jones, who added an "electro motor" to an 1865 Bartlett machine (fig. 66). The attachments that were developed during the latter part of the 19th century numbered in the thousands; many of these were superfluous. Most of the basic ones in use today were developed by the 1880s and remain almost unchanged. Even the recently popular home zigzag machine, an outgrowth of the buttonhole machine, was in commercial use by the 1870s. Sewing-machine improvements have been made from time to time. Like other mechanical items the machine has become increasingly automatic, but the basic principles remain the same. One of the more recent developments, patented M in 1933 by Valentine Naftali et ah, is for a manufacturing machine that imitates hand stitching. This machine uses a two- pointed "floating needle" that is passed completely through the fabric—the very idea that was attempted M patent 1,931,447, issued to Valentine Naftali, Henry Naftali, and Rudolph Naftali, Oct. 17, 1933. The Naftali machines are manufactured by the American Machine and Foundry Company and are called AMF Stitching Machines. Figure 67.—Six-cord cabled thread. over one hundred years ago. The machine is cur- rently used by commercial manufacturers to produce decorative edge-stitching that very closely resembles hand stitching. THREAD FOR THE MACHINE The need for a good thread durable enough to with- stand the action of machine stitching first created a problem and ultimately another new industry in this country. When the sewing machine was first devel- oped the inventors necessarily had to use the sewing t
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