Patent GB-190048-A (GB)
Title: Improvements in sewing machines
IPC: D05B3/20
Filed: 1922-01-24
Abstract: 190,048. Fairweather, W., (Singer Manufacturing Co.). Jan. 24, 1922. Labels, attaching.-A sewing machine for attaching labels, patches &c. comprises a feeddisc having slots in which the labels are placed and by the intermittent rotation of which they are presented successively at stitching position and on the underside of the work. During the stitching a spring actuating the disc is wound by movement of the feed and on completion of the stitching the disc is advanced one step by the spring when released by a catch device operated by the presser-foot. A machine of known type is provided with a label-supporting disc 40 mounted on a feed-bar 18 to which longitudinal and lateral feed movements are given by grooves in a pattern wheel, one being shown at 16. The longitudinal movements are given by a lever 19 engaging the groove 16 and provided with a slotted arm embracing a block 22 adjustable on a post 23 in the slide plate 18. The groove actuates a lever 24 connected by a link 20 to the slotted arm 27 of a bell-crank lever pivoted to the base plate, its other arm being connected by a link 30 to a head 32 secured to a bearing-pin 34 which enters an aperture in the bar 18 and is secured therein by a nut 38, Fig. 5. The disc 40 is secured to a hub-member 42 rotatable on the pin 34 and rests on the surface of the plate 1. The labels p are received in cavities 44 formed with retaining lips and are held in place against the fabric f during the stitching by the. flange 54 of a presser-foot 51 mounted in the head of an arm 48 rigidly secured to the bar 18. The hub 42 is formed with a flange 55 having notches 56 in which engages a tooth 60 on an escapement lever 59 pivoted on the head 32 and controlled by a spring 61. A spring 64 arranged in a cavity in the hub is connected at one end to the hub and at the other to a ring adjustably secured to a ratchet disc 66. A pawl 73 mounted on the head 32 engages the ratchet to hold the spring in tension. The motion of the work-holder in the stitching of the first longer side of the label is utilized to wind up the spring 64 by turning the ratchet 66 cne step through the action of a pawl 77 pivoted on the bed 1 and held in forward position against the retracing action of a spring 79 by a latch 81 engaging a stud 85 on the pawl and formed with a tail-piece 83 projecting into the path of a pin 89 carried by the head 32. After the spring has been wound the latch 81 is tripped by the stud 89 releasing the pawl 77 which is withdrawn by the spring 79 to inoperative position. A stud 87 on the pawl is engaged by a part connected with the presser-foot by the operation of which the pawl may be reset. In order to ensure the correct positioning of the disc when rotated by the spring there is pivoted on the lever 59 a bellcrank lever one arm 93 of which engages the notches 56 of the member 42. Another arm 94 of the lever carries a pin 95 engaged by a spring- controlled latch 97 pivoted at 98 to the lever 59. The lever 59 is held by its spring during stitching in the position shown in Fig. 5. During the stitching of the, second side of the label the latch 97 is tripped by a projection 101 whereupon the, bell-crank lever turns under the action of a spring 100 so as to bring the arm 93 immediately below the preceding notch 56 of the hub, into which it passes when, at the conclusion of a stitching operation, the lever 59 is rocked by the operator to release the tooth 60 from a notch. The hub and plate 40 are thereupon rotated by the spring 64 until the arm 93 is brought to rest by engagement with a stop 102. The device for rocking the lever 59 comprises a lever 103 which is moved to engage the lever 59 by a lever 106 actuated by a chain &c. 109 which at the same-time acts through a chain 111, lever 112 and bar 114 to lift the presser-foot. An extension of the lever 103 engages the pin 87 to reset the pawl 77. The, labels are inserted in the cavities 44 at a filling-station t comprising a pan 119 provided with guide-strips 120 registering with the sides of a cavity, one strip supporting a retaining strip 121 and the other a guard plate 122. A plate 124 deflects a label into the cavity. A guard plate 125 covers the labels between the filling station and the stitching point to prevent disarrangement.