GB448385A - Puller-feed mechanism for sewing machines - Google Patents

Abstract

448,385. Sewing-machines. FAIRWEATHER, W. C., 65, Chancery Lane, London.- (Singer Manufacturing Co. ; Elizabeth, New Jersey, U.S.A.) Nov. 2, 1935, No. 30313. [Class 112] A puller feed comprising a pair of toothed rollers arranged to ride easily over heavy cross-seams, works in conjunction with the usual feed dog to feed the work. The usual four-motion feed dog 10 is mounted in the feed bar 15 fulcrumed on the feed rocker 17 and is operated in the usual way. A shaft 26 journalled in the bed-casting carries the lower toothed feed wheel 27 disposed in rear of the feed dog 10. The shaft 23 carries a spur gear meshing with a spur gear 30, on a shaft 31 to which step-by-step rotary feed movements are imparted by an eccentric 34 on the main shaft 9. This eccentric actuates a pitman 35 which drives the shaft 31 through the usual roller clutch mechanism. The upper feed roller 57 is driven from the shaft 31 by bevel gears 37, 38, vertical shaft 39, bevel gears 41, horizontal shaft 42 and the shaft 47 furnished with universal ball couplings at both ends. The shaft 56 carrying the upper roller 57 is journalled in bearings in the arm 60 of a lever 61 pivoted to a bracket 63 on the auxiliary presser bar 67. This presser bar is vertically movable in bearings against the spring 72 to enable the roller 57 to ride over thick seams. The presser bar 67 is lifted by a hand lever 79.