US600231A - Sewing-machine - Google Patents

Description

(No Model.) 2 SheetsSheet I,

' J. H. MOONEY.

SEWING MACHINE. No. 600,231. Patented Mar.8,1898.

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J. H. MOONEY.

SEWING MACHINE.

No. 600,231. Patented Mar. 8,1898.

Sal/2410K- UNITED STATES PATENT EEIcE.

JOHN II. MOONEY, OF OAKLAND, CALIFORNIA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 600,231, dated March 8, 1898.

1 Application filed November 8, 1893. $erial No. 490,399. (No model.)

To all whom, it may concern:

Be it known that I, JOHN H. MOONEY, acitizen of the United States, residing in the city of Oakland, county of Alameda, and State of California, have invented certain new and useful Improvements in Sewing-Machines, of

which the following is a specification.

This invention relates to improvements made in feed-operating mechanism for sewing machines of that kind or description which are constructed for the special Work of sewing coarse and heavy kinds of goods, such as jute cloth, where a long stitch is required; and the said improvements consist in certain novel construction and combination of parts, as hereinafter described, and pointed out in the claim, producing a feed-operating mechanism having the quality of working at a high rate of speed with a long stitch.

The nature of these improvements and the manner in which I have constructed and applied the same are explained in the following description, in which reference is had by letters to the accompanying drawings.

In the said drawings, Figure 1 represents in front elevation a sewing-machine containing my said improvements, with the bed and work-table shown in longitudinal section and a portion of the face-plate on the gooseneck broken away to expose the parts inside. Fig. 2 is a view from the left-hand side of Fig. 1, partly in transverse section, the section being taken about the line a: a, Fig. 1. Figs. 3 and dare views, on an enlarged scale, of the cranks and eccentrics on the main shaft. Fig. 5 is a cross-section, on an enlarged scale, through the main shaft in front of the feed mechanism, showing the position of the parts when the feed-point is dropped below the clothplate out of contact with the goods. Fig. dis a top view of the same parts with the feedpoint removed from the end of the feed-bar. Fig. 7 shows the position of the feed when the feed-point is acting on the goods at the highest point of its throw. Fig. 8 is a side view of the oscillating lever in the feed-motion.

A indicates the bed, and A the work-supporting table, of the frame.

13 is the arm or gooseneckthat supports the needle-bar.

O is the needle-bar, D the looper, and E the feed-points.

All the operating parts of this machine receive motion from a single shaft G, having continuous rotary motion in one direction, the rotary motion being transformed or changed in character and in direction by means of cranks and eccentrics to prod nee the different movements of the needle, the looper, and the feed. This shaft has hearings in boxes A and is driven by a fast pulley V. A loose pulley W and a balance-wheel are fixed on the same end of the shaft.

H is a crank on this shaft actuating the needle-bar, and H is a counterbalance.

I is the needle-arm, and O is the needlebar, connected to the crank II by the arms.

B B are needle-bar guides on the frontof the gooseneck. A long screw or stud K on the backof the needle-bar connects that part with the arm I, and the front plate of the gooseneck has a long slot for this stud to play in.

The perpendicular movement or rise of the feed points to engage the fabric and the longitudinal throw or movement to feed the fabric forward are produced from the single shaft by a crank L and an eccentric M on this shaft through the medium of two oscillating bars or levers P P one of which forms the feed-bar and carries the feed-points on its upper end,whi1e the other one controls and modifies its movements to produce the longitudinal throw or feed to move the goods. The bar I has a hub or strap P fitted to the eccentric M, and the feed-points E are attached to its upper end by screws 13 p The lever P is pivoted to a lug A on the bottom of the machine table, and on this pivot as a center it moves in a vertical plane across the line of the shaft G. This pivot is a stud p on the back of the lever. In the slot or open center of this lever are fitted two movable blocks R S, fitted to slide smoothly. To the upper one B is connected the feed-bar P by a stud R on that slide, while the lower slide S forms a box for the crank L, that oscillates the lever P on its center The point B therefore travels in an arc across the line of the shaft and produces longitudinal movement of the feedpoint on the upper end of the feed-bar by the rotary motion of the crankshaft. The length of this throw of the feed-point is regulated by shifting the point B toward the pivot p to shorten the throw or away from it to increase the throw. The eccentric M, acting on the lower end of the feed-bar, produces the required vertical movement or rise and drop of the feed-points alternately to engage with and disengage from the goods. The bar P is slotted for the stud R, and a nut and washer R secure the bar to the slide R. The length of stitch is altered by shifting the stud R up or down in the slot.

This construction of feed mechanism is particularly adapted for working on coarse and heavy goods with a long stitch and all the motions are rotaryin character. It is capable of being run at high speed.

The same points are attained also in the looper-actuating mechanism operated from the same shaft in this machinenamely, a long throw or reciprocating movement of the looper sufficient to control and interlock the needle-thread loops with simple and rapid movements in the actuating mechanism.

The general movement of the looper is in a longitudinal direction lengthwise of the principal shaft G, but in addition thereto the acting-point of the looper oscillates in an arc, the combined movements causing the .point of the looper to travel in an elliptical or oval path to seize and spread the loops with certainty.

I produce the two motions before mentioned directly from the same shaft G that operates the feed and needle by means of a peculiarlyconstructed crank T and an arm U, connected to the crank and working at the upper or free end in a guide slot or race over the shaft and parallel with it. This crank differs from an ordinary crank or eccentric in being set at an angle to instead of parallel with the axis of the shaft, as will be understood from the views of this part shown in Figs. 1 and 4, representing different positions of the crank in the rotation of the shaft. This peculiar form of crank is described in the Letters Patent granted to me on the 19th day of July, 1881, No. 244,470, wherein it is termed a gyratin g crank. In that machine it was employed also to operate the looper but in that case the construction of the parts connected with and actuated by the crank was such thatthe center of the oscillating or lateral movement of rocating movement or throw of the arm produced by the crank. The present construction differs from that. embraced in the aforesaid Letters Patent principally in placing such center of oscillation of the arm behind the point of the looper instead of in advance of it and also coincident with the axis of the arm, and in consequence of this change only the point of the looper describes the necessary oval or elliptical path to seize the needlethread loops and present them in proper mannor to the needle, while the rear or opposite end of the looper that is attached to the end of the arm has practically no such lateral movement. Thus I am enabled to greatly reduce the general movement or throw of the arm U, so that instead of requiring it to travel in a circular path it has only a simple partially-rotating movement on a perpendicular axis in addition to its longitudinal throw.

The parts comprising the looper and its actuating mechanism and such other parts as are described with the present improvements are reserved by me for separate applications.

Having thus fully described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

In a sewing-machine, the combination, with the actuating-shaft having the cranks or eccentrics L M, of the slotted bar P pivoted at the upper end to the under side of the machine-bed, to oscillate in a vertical plane, the sliding box S, on the crank L, fitted to move in the lower part of said bar, and the sliding block R in the upper part having a stud R, and the lever P carrying the feed-point E on the upper end, and having a strap P on the lower end to embrace the eccentric M, and a slot through which the stud R is set and is adjustable therein,the said stud being threaded on the end and fitted with a clamp-nut, substantially as hereinbefore set forth.

In testimony that I claim the foregoing I have hereunto set my hand and seal.

JOHN H. MOONEY. [L. s. \Vitnesses:

EDWARD E. OSBORN, CHAS. E. KELLY.

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