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Treadle-Spring.
Patent for an improved treadle spring to be used in treadles that are used in sewing machines, scroll-saws, and similar machines. It is simple, inexpensive, efficient, and requires less effort to operate the treadle. The spring does not move while in use.
Date:
March 6, 1894
Creator:
Frank, Gustav, Jr.
System:
The Portal to Texas History