GB191206042A - Improvements in Feed Mechanism for Sewing Machines. - Google Patents

Abstract

6042. Willcox & Gibbs Sewing Machine Co., [Willcox & Gibbs Sewing Machine Co.]. March 11. Sewing-machines; feed by dog.-A duplex feed for delivering knitted fabrics to the needle of a sewing-machine in an unstretched condition is provided by feed dogs on two separate feed-bars, the ends 332, 353 of which are shown in Fig. 5. These feed-bars are pivoted to and actuated by levers 745, 746 having sliding rocking pivots intermediate their ends. The lever 745 receives positive actuation from a driving- element 325, and the lever 746 is pivoted upon the first and is actuated by it. The pivot-pins 747, 750 are carried by rack-plates 749 and 752, which are engaged by pinions on spindles mounted in a block secured in the frame of the machine. The heads of these spindles are received within circular recesses in a cover-plate secured to the block and are graduated to indicate the feeding movements. The pivot pins 747, 750 screw into the rack plates and can be turned, after adjustment, to lock them in place. The feed-bars are formed with a slot 339 for the reception of a turning block, such as 312, Fig. 5, mounted on a fixed pivot. The feed-dogs have three rows of teeth and each is secured to a ribbed part 344 of its feed-bar by a screw 345. The driving-element 325, may be, as shown, a pin upon a rocking and axially sliding sleeve 316 which is actuated by a lever 310 as described in Specification 6039/12.