Improvements in Stop Motions for Sewing Machines.
9164. Roberts, J. W., Brewster, A. P., and Bryson, B. Dec. 18, 1912. Sewing-machines; stopping-gear, automatic.- Relates to apparatus for stopping a sewing- machine when the thread breaks. A spring- pressed plunger 26 slides within a cylinder 21 which is pivoted at 22 to the machine head and is normally held to the right of its central position by the tension of the needle thread which passes through an eye 28 upon it. When the thread breaks, a spring 25 moves the cylinder 21 to the left and brings the plunger into line with a projection 19 on the needle-bar which, thereupon, engages the plunger, moves it downwards and causes it to actuate a trigger lever 34 of the stop-gear.