US1053226A - Portable chain-stitch sewing-machine. - Google Patents

Description

L. SALTER.

PORTABLE CHAIN STITCH SEWING MACHINE.

, APPLIGATIONIIILED DEO.19. 1911.

1,053,226, Patented Feb. 18,1913.

2 SHEETS-SHEET 1.

Niven-ma LESLIE SALTER mwwgmwt f L. SALTER.

PORTABLE CHAIN STITOH- SEWING MAGHINE. APPLIOATION ITILED 1330.19. 1911.

1,053,226.- frammed,Feb.1 s,1913.v

. lnvcprr Lssu: LTER v smm Arron M 1 LESLIE SALTER, OF LONDON, ENGLAND.

PORTABLE CHAINSTITCH SEWING-MACHINE.

Specification of Letters Patent.

Patented Feb. 18,1913.

Application filed December 19, 1911. Serial No. 666,728.

To all whom it may concern:

Be it known that I, LESLIE SALTER, subject of the King of G'reat Britain and Ire-.

land, residing at 50 Gopthall avenue, London, England, have invented new and useful Improvements in Portable Chain-Stitch Sewing-Machines, of which the following is a specification.

This invention relates to a portable chain stitch sewing machine, and consists of the formation of parts to make the machine a chain stitch sewing machine for household.

use.

The essential characteristic of this machine is that the driving cam drives through a back pivoted lever whose lower end engages with an under lever also pivoted at about its center, which engages a rocking hook looper, so as to produce a horizontal movement on said looper, its lower end being pivoted on an under link which at its view of the eccentric anle for supporting the hand wheel. Fig. 5 1s a cross section to show the presser feeding foot with the cam operating it. Fig. 6 is a similar view to Fig. 5 showing the cam in a position to just lift the presser feeding foot which is, shown in its extreme position of feed. Fig. 7 is a similar view to Figs. 5 and 6 showing the presser feeding foot lifted.

The metal frame a is in' the shape of the letter G and in its base a is the screw 6 which forms the center of the hook lever 72 This hook lever b is actuated by a back.

lever c pivoted at 0 Fig. 4, which is actuated by the driving cam 0 attached to the top shaft d engaging with the fiat head 0 the said cam being driven by two geared wheels d d from the hand wheel c. This lever c terminates with a finger c which engages with a hole b in the lever 6 These two levers c and b are kept close to the driving cam by a spring 12 underneath the center of the hook lever 5 one end of said spring being attached to the lever b and the other to the framework.

To the front portion of the hook lever b is attached a rounded part b which makes connection with a hook looper f which is pivoted on a link 7 of which the outer end is pivotally mounted upon the stud Ffixed to the framework. This hook looper f is supported at its upper portion by an aperture which receives the rounded part 'b of the hook lever 6 moving horizontally and is thus given a rocking motion about its under link supported by the pivot f which is part of a rocking link f pivoted at its upper end f on to a standard in the framing, so as to enable it to catch and then to release the cotton when the needle is in its lowest position and which thereby forms the chain stitch.

The driving wheel e is mounted on a pin 6 of which a portion of it e is made eccentric to the outer portion. This is fitted into a sleeve e which enables the eccentric portion 6 of the pin e to be moved upward, so as to cause the gearing d al to engage properly with one another. When this en gagement is made the inner eccentric portion of this pin is secured by a screw stud e, the outer driving wheel 6 revolving freely on the outer portion 6 of this pin.

Upon the upper shaft d at the front end is fitted the feed cam g from which both the needle bar it and the'presser feeding foot la are actuated. Upon the outer face of this feed earn 9 is placed as part of ita disk 9 in a hole in which a bent wire 9 shaped like an 5 forms a connecting rod from the disk to the needle bar it one end of the wire entering the hole in the cam and the other end being secured to the needle bar h. This needle bar h works between two guides it over which are two small plates 72, to allow the needle bar to work freely up and down.

The needle Z is fixed to the lower part of the needlebar h by means of a clip or stop Z wit-h a screw Z to adjust the needle, and to prevent it slipping from itsv working position.

To one side of the needle bar it is fitted the presser feeding foot 7:, which'is held in a slotm in the frame for it, and oscillates about a pin n fixed to the frame which passes through a-slot n in the presser feeding foot.

The feeding cam g as it rotates acts'upon part of the presser feeding foot, thrusting it out where it revolves about the pin a, fixed at the upper end -of the presser feeding foot making an efiective feed upon the work as the presser feeding foot is held down by the spring of. The presser feeding foot is also held upagainst the side reaction by a spring n VVhen' this presser feeding foot has completed its feed, the continued rotation of the cam 9 comes under an arm m "and thus lifts the presser foot for its return.

' An adjustment of the stroke laterally of the presser feeding foot is effected by a screwed stud p which reduces the stroke of the feed laterally to a minimum.

A spring pressed cam 79 (Fig. 3) working on a "fixed stu'd in the frame may be worked by hand to raise the presser feeding foot by engagement with the projecting neck 79 out of contact with the work.

"The reel holder 1" is fixed by the under portion of this wire being bent at r and passed through the upper portion of the machine above the aXle (Z. The cotton,

passes through a guide r and through a tension r down to the needle.

To the main driving wheel 0 is fitted a folding handle .9 which when it is closed causes a spring with a corresponding depression 8 driving wheel 6 is provided with a depres sion 23 by which a driving band can be. attached'from an independent ,foot treadle- All the above described parts with the usual gearing, work in unison to form chain stitch sewing machine, with fewer parts than heretofore so as to make itcheap in construction and portable.

Having thus fully described my inven-i tion, I claim as new and desire to secure by Letters Patent l; A portable chain stitch sewing machine, having in combination, a pivoted rocking hook looper having means at its upper:

portion for the insertion of a hook lever to' support the same and a pivoted joint at its lowest part, a hook lever moving with a horizontal movement thus supporting the. hook looper, a link below the said hook looper pivoted at one end to the under pivot of the said hook looper and at the other end pivoted to the framing, the looper being thus given a rocking motion in combination with the horizontal movement of the said supporting lever, a back leverconnected' with the hook lever, and a cam;

pressed knob s to engage This;

on the driving shaft driving the said back lever.

2. A portable chain stitch sewing machine, having in combination, a pivoted rocking hook looper having a hole in its upper part and a pivoted joint at its lowest part, an under link pivoted at one end to the said looper and at the other end to a fixed standard 'in the framing, an under upper hole of the said hook looper to support the same and to give to it a horizontal movement, a pivoted back lever en aging with the said-hook lever, and a cam upon the driving shaft to drive the said back lever.

3. A portable chain stitch sewing machine, having in combination, a pivoted rocking hook looper having a hole in its upper part and a pivoted joint at its lowest part, an under hook lever pivoted on a bolt in the horizontal framing moving horizontally having at one end a pin engaging in the said hole at the upper part of said hook looper and at the'other end an aperture, a back lever pivoted on a bolt in the vertical frame engaging by a finger at one end with the said aperture of the said hook lever, and having a flat head at its upper end, and a cam upon the main driving shaft adjacent to the driving wheel driving the said back lever transversely to the vertical back of the machine.

4. A portable chain stitch sewing machine, having in combination, a pivoted rocking hook looper having a hole in its upper part and a pivoted joint at its lowest part, an under hook lever moving horizontally engaging at one end with the hole in the upper part of the saidhook looper, a back lever connected to this hook lever, a cam on the driving shaft adjacent to the driving wheel operating the said back lever transversely to the vertical back of the machine, and a horizontal coiled spring about the center of the under hook lever, connected to the underhook lever and to the framework, to press the upper endof the back lever, through the under hook lever by the connection between said levers upon the driving surface of the said cam.

In testimony whereof I have signed my name to this specification 1n the presence of two subscribing witnesses.

- LESLIE 'SALTER.

l/Vitnesses RICHARD A. HOFFMANN, WALTER CARVER.

pivoted hook lever engaging in the said Gopiesofthis patent may be obtained for five cents eaeh by addressing the Commissioner of Patents, 1 Washington, D. G.

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