US554393A

US554393A - moore

Info

Publication number: US554393A
Authority: US
Publication date: 1896-02-11
Anticipated expiration: 1913-02-11

Description

4 Sheets-Sheet 1.

(No Model.)

A H. MOORE SHUTTLE DRIVING MEGHNISM FORSEWING MACHINES.

No. 554,393. Patented Peb. 11, V1896.

4 Sheets-Sheet` 2 (No Model.)

, ILMOQRE. `SHUTTLE DRIVING MEGHANISM FOR SEWING MACHINES.

Patented I'eb. II,- 1896.

l/l//T/VESSES. Y

(No Model.) 4 Sheets-Sheet 3.

H. MOORE. SHUTTLE DRIVING MEGHANISM FOR SEWING MAGHINES. No. 554,393.y

Patented Feb. Il, 1896.

(No Model.) 4 sheets-sheen 4.

Y H. MOORE.4 N SHUTTLE D'EIVING MECEANISM EOE SEWING MACHINES.

N0. 554,393. Patented Feb. 11, 1896.

. Same.

lliure Terne- EFFICE@ SHUTTLE=DRIVING NIECHANISV] FOR SEWING-MACHINES.

#a SPECIFICATION forming part of Letters Patent No. 554,393, dated February 11, 1896. Application filed December 16, 1893. Serial No. 493,857. (No model.) Patented in England July 15, 1893,1To. 13,782.

To ctZZ whom t may concern.-

Be it known that I, HARREY MOORE, asubject of the Queen of Great Britain a-nd Ireland, residing at Wellingborough, in the county of Northampton, England, have invented certain new and useful Improvements in Sewing- Machines, (for which I have obtained a patent in Great Britain, No. 13,7 82, bearing date July l5, 1893;) and I do hereby declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

This invention for improvements in sewingmachines relates to lock-stitch machines in which the bobbin or thread-case is support; ed within a continuously-rotatin g hook or shuttle.

This invention consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the accompanying drawings, Figure l is a sectional elevation of a sewing-machine constructcd according to this invention, and Fig. 2 is a part central vertical section showing the shuttle and its driving mechanism, and Fig. 3 is a part sectional front end elevation of the Fig. l is a front sectional elevation showing the fixed shuttle -bracket and the shuttle-drivers. Fig. 5 is a cross-section through the shuttle-driving mechanism, showing the parts in the positions they occupy when the shuttle-hook is taking the loop from the needle, the shuttle being driven at its heel; and Fig. 6 is a front elevation of the same. Figs. 7 and 8 are corresponding views to Figs. 5 and 6, showing the shuttle driven at its hook after the loop has passed the hook.

The rotary hook or shuttle a rotates in the bearingpieces l), supported by a ring Z2', secured by screws to the bracket b2, depending from the cloth-plate c. As shown, the race Y of the bearing-pieces l) is n shape in crosssection, and a corresponding recessis formed in the periphery of the rotary shuttle. The

bearing-pieces ZJ are secured to the ring o by means of screws b3 passing through elongated holes in the bearing-pieces so that the position of the center of rotation of the rotary shuttle can be adjusted laterally and so that any wear between the bearing-surfaces of the race and shuttle can be readily taken up.

The bearing-pieces o are adjusted by means of the screws b4 passing through the fixed ring Z9. i The ring b' can also be adjusted on the bracket h2.

The thread-case CZ for the under thread is formedin two halves adapted to be secured together by catches and to contain a ball of twine e without reel or other support, the thread being drawn from the center of the ball and passing through a hole CZ in the top of the case through a suitable tension device.

The thread-case is formed with two spherical recesses d2 opposite to one another and by which it is suspended centrally within the shuttle. The shuttle is provided at its center with a spherical projection d3 taking into the inner recess d2 of the case (Z, and a ball f', loosely carried in a latch-lever f, takes into the other recess (Z2. The latch-lever f is pivoted to a projection b5, secured to the ring b by a screw h6. The upper end f2 of the latchlever f is forked to engage the projection d4 on the thread-case CZ to hold it stationary while the shuttle rotates.

It will be readily seen that as the shuttlehook carries the loop from the needle round to inclose the locking thread, the thread easily passes the lever f holding the thread case CZ stationary as the ball f is free to rotate on the passage of the thread. The ball f is inserted from the back of the lever and is retained in place by the spring f3. The latchlever f is retained in the position shown by the latch f4 controlled by the spring f Y The shuttle a is driven by means of two drivers g g fixed on the concentric shafts 7L 7L', the shaft h being mounted within the shaft h and the shaft 7L,I being mounted in a bearing c2 depending from the cloth-plate c. The shafts h h are driven from the counter-shaft i', itself driven from the main shaft e', as clearly shown. The axis of the shafts 7L 7L is eccentric to that of the counter-shaft c" and the shaft h is driven by means of the link j and arm Z from the part m of a double eccentric-stud fixed to a disk t2 on the end of the conntenshaft 'iand the shaft 7L is driven by means of the link j and arm Z from the part m of the double eccentric-stud, the part ml being slightly in advance of the part m, so that the shuttle is driven alternately by the two drivers g g,as will be presently described.

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The eccentricity of the shaft e" causes the drivers to be driven at a variable speed so that when the hook is taking the thread from the needle the speed is slow. As the part m/ is in advance of the part m of the eccentricstud the speed of the drivers is also variable in relation to one another, the driver g acting on the heel of the shuttle and driving the shuttle, as shown in Fig. 6, while the hook is taking the thread and until the loop has passed the driver g, and the driver g acting on the hook of the shuttle and taking up the driving, as shown in Fig. S, when the loop passes the driver g acting on the heel of the shuttle.

The feed plate or ring n is circular and works on a yoke o fixed at one side toa shaft o supported by pivots o2 screwing into lugs c4 depending from the cloth-plate c. The other side of the yoke 0 is pivoted to a screwed lug 03, on which screws a nut o, itself screwing into the cloth-plate c. The outerandinner threads of the nut o4 are of different pitch, or one is right and the other left handed, so that by screwing or unscrewing the nut 04 the height of the center of the sheave ois adjusted, and consequently the amount the feed plate or ring projects above the cloth-plate e. The feed plate or ring n is retained on the sheave by the flange 05 of the sheave on one side and by the spring o6 and headed screws 0T secured on the other side of the sheave and can be removed therefrom by removing the spring 06 and screws 07.

The feed plate or ring n is rotated after each stitch has been made by means of a nipping-lever p having a square recess fitting loosely on the lip n of the feed plate or ring. The lever p is pivoted at its outer end to the link p, itself pivoted to an arm p2 on a counter-shaft p3. A spring p4 secured to the sheave o acts on the inner end of the lever p and tends to force this end backwardthat is, in a direction opposite to the motion of the feed plate or ring. The sheave or yoke 0 is cut away at o8 to allow of the motion of the nipping-lever. It will readily be seen that if the nipping-lever is moved forward by the link p the lever p will be slightly twisted and will nip the lip n' of the feed plate or ring and force it forward to feed the plate, as shown in Fig. 3. On the return of the link p the spring p4 at the same time forces back the inner end of the lever p. Consequently it slides freely over the lip n. The backward motion of the feed plate or ring is prevented by a nipping-lever r having a recess fitting loosely on the lip n' and having its outer end bearing against the boss 09, by which the yoke o is fixed to the shaft o. The lever r is pulled in the backward direction by the spring 7*. The yoke 0 is suitably cutaway at 010 to allow the lever r to act.

The counter-shaft p3 is actuated from an eccentric s on the main shaft i, the eccentricrod s being jointed to one end of a lever 82 pivoted at s3 to the main frame of the machine. The other end of the lever S2 is formed with a roller-race in which works a roller S4 mounted on one end of a link S5 connected to an arm s6 on the counter-shaft p3. A vibratory movement is thus given to the shaft p3 and nipping lever. In order to vary the amount of this movement the link 35 slides freely in a sleeve S7 pivoted to the head of a screw 88 fitting in a nut s screwing into the frame, The external and internal threads of the nut s are right and left handed or of different pitch, so that the sleeve S7 can be moved inward or outward to vary the distance of the roller .s4 from the fulcrum of the lever s2 and consequently the motion of the countershaft p3.

The feed mechanism herein shown and described but not claimed is described and claimed in a separate application, Serial No. 522,606, filed September 10, 1894.

That I claim is- The combination,with a revoluble shuttle, and a thread-case suspended centrally within the shuttle; of the hollow shaft h provided with the driver g engaging the heel 0f the shuttle, and the arm Z'; the shaft 7L journaled in the shaft 7L and provided with the driver g, and the arm l; the counter-shaft t" provided with a disk; the double eccentric-stud m m projecting from the said disk; and the links j and j' operatively connecting the said stud with the said arms Z and Z respectively,where by the shuttle is driven with variable speed, substantially as set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

I-IARREY MOORE.

Witnesses:

ALBERT JoNEs, THOMAS LAKE.

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