GB462852A - An improved rib-tip holder attachment for sewing machines - Google Patents

Abstract

462,852. Sewing-machines. LEVIN, J. Nov. 28, 1935, No. 33072. [Class 112] A sewing - machine attachment for use in securing rib tips to umbrella covers consists of a clamping device 48, and a holder 29, on which the tip 33 is held by jaws 30, 31, one of which is flexible and controlled by a spring 32. The holder 29, collar 28 and stem 27 are all horizontally adjustable in a pivoted block 23 controlled by a spring 24 which lifts it clear of the plate 20. This movement is limited by the stop 56. The block 23 is attached to the bracket plate 15 which is connected adjustably to pivot arm 13. On this arm is an adjustable slide plate 50, to which is pivotally secured clamp bar 46 and pressure foot 48, the movement of which bar is controlled by the rod 54 pressing downward and the treadle operated chain 53. The cover is placed inside-out over the rib tip, Fig. 9, the chain 53 released which allows rod 54 to lower arm 46 causing the spring finger 51 to push block 23 on to plate 20, which locates cloth on tip 33 and continued movement of arm 46 clamps the cloth 42 around the tip which is then sewn. Pressure on the treadle causes chain 53 to pull arm 46 up, firstly to release pressure foot 48, then allow block to rise, and finally through slotted link 57 to raise bar 13 and break stitching thread.