Patent GB-191107614-A (GB)
Title: Machine for Sewing Linings to Articles of Clothing.
Inventor: LENLER JENS FREDERIK JOHNSEN
IPC: D05B85/00
Filed: 1911-03-27
Granted: 1911-11-23
Abstract: 7614. Lenler, J. F. J. March 27. Running-stitch machines; blind-stitch sewing-machines. - Hand-made seams for sewing-on l i n i n g s are imitated by a blind - stitch running-stitch machine in which a device is provided for pulling- through and tightening the thread. The needle 22 is carried between two pairs of fingers 21, z supported o n carriers s, t mounted in a slide n reciprocating on a table c, being connected by a projection p to a crank q, the crank being driven from a shaft f. An adjustable spring 23 presses the fingers together. The fingers 21 are connected by links 26 to levers 27, which are actuated at intervals by a cam lever 31, driven by a projection on the shaft f, to open the fingers as required. The carriers s, t are guided in grooves in the carriage n and have projections w passing into a slot m in the table. Below the projections is a plate 34 guided in a sleeve 35 and connected to a lever 36 actuated by two stops 40 on the shaft f, while alongside the plate 34 is a guide 45 having at one end a pin 46 passing through a hole in the table and at the other a part 47 projecting into the slot m. The guide has an arm 48, with a guide flange 49, connected to a lever 31 actuated by a stop 53 on the shaft f. The back end of the needle 22 is held in a recess in a pin 54 supported in a sleeve 55 connected to the carriage n. When the pin 54 comes against the material, in the advance of the needle, a spring pawl 56 contacts with a stop 57 to allow the pin to slide back in its sleeve, it being pushed out again near the end of the retracting movement by contacting with a stop 58. The material is held over a bender 59 by a forked extension of a presser-foot 61, which co-operates with an ordinary four-motion feed to feed the cloth in a line at a small angle to the line of stroke of the needle. As the needle advances, it pierces the material, and first the front finger 21 is released by the cam 31, and the fingers raised over the cloth by the rising of the plate 34, and then the back fingers are opened and raised. The fingers fall and close over the needle as soon as they have passed the work, being forced down by springs 41. A spring- pressed lever 83, passing behind a pin 82, holds the fingers open, until, on falling, the lever 83 is raised by a stop 85. On returning, both pairs of fingers are raised over the work, without releasing the needle, by the plate 45. To pull the thread through the work a swinging hook 93 is provided, which may be made springy to release the thread at a certain tension, but is preferably turned at the right time by movement of a lever 103, against which the arm 101 is normally held by a spring 102. The hook 93 is mounted on a lever 92 pivoted at 89 and actuated at its back end by a crank 91. The lever 103 is pivoted to the lever 92 and carries a plate 106 adapted to contact with a projection 119 on a frame supported on a carriage 108, which is mounted as the nut of a screw 109, which is driven by gearing from a ratchet-wheel 112, the pawl 113 of which is driven from the lever 92. The carriage is thus advanced at every swing of the lever 92, and consequently the contact between the members 106, 119 occurs earlier and earlier in the stroke, to release the thread earlier as it shortens. The contact depresses the part 106 so that a pin 107 is seized by a lever 121 pivoted at 120 and held thereby until, on reaching the inner limiting position, a stop 123 strikes a stop 124 on the carriage 108 to push back the lever and release the pin.' The thread is held between a pair of fingers 21, z to prevent it from pulling through the eye.