US351594A - Sewing-machine - Google Patents

Description

(ModeL) 2 Sheets-Sheet 1. O. F. HARLOW & E. E. ANGELL.

SEWING MACHINE.

I No. 351,594. Patented Oct. 26, 1886.

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c. F. HARLOW & B. E. ANGELL. SEWING MACHINE.

No; 351,594. Patented 001;. 26, 1886.

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CHARLES F. HARLOW AND 1 EDWIN E. ANGELL, OF MALDEN, ASSIGNORS TO THE GLOBE SEWING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

SEWING-MACHINE."

SPECIFICATION forming part of Letters Patent No. 351,594, dated October 26, 1886.

Application filed October 14, 1884. Serial No. 145,480. (Morleld To all whom it may concern:

Be it known that we, CHARLES F. HARLOW and EDWIN E. ANGELL, citizens of the United States, residing at Malden, in the county of Middlesex and State of Massachusetts, .have invented certain new and useful Improvements in Sewing-Machines; and we do hereby declare .is carried around it.

that the same are fully described in the following specification, and illustrated in the accompanying drawings. a

The object of this invention is to provide a simple, cheap, and compact sewing-machine, which may be driven by hand or foot power, and clamped 0r screwed upon a table or other convenient support, and which may employ either a single-thread loop-stitch mechanism or a double-thread loop-stitch mechanism.

Our invention includes the improved. machine having this substitute mechanism, and the peculiar construction permitting the use of each form alternately; also, a novel lower thread-holder and means of supporting it in position.

'In the drawings, Figure 1 is a perspective View of the machine with the work-plate removed, showing the lock-stitch mechanism in position for use. Fig. 2 is a top plan showing the feed apparatus partly in section and the lock-stitch mechanism removed or out of position. Fig.3 is avertical section through the feed-bar in the plane of the driving-shaft; Fig. 4 is a'detail view illustrating the operation of spreading alobp of needle-thread around the lower thread-holder. Fig. 5 is an end view, partly in vertical section; and Figs. 6, 7, and 8 are further details of the lower thread-holder; showing how the loop of the upper thread Fig. 9 is a side viewof the spreader of the lock-stitch mechanism, and Figs. 10 and 11 transverse and longitudinal or axial sections of the same, showing also the stationary eccentric which oscillates the revolving hook-lever. Fig. 12 is an end view showing the looper substituted for the spreader and the lower thread-holder swung aside. Fig. 13 is a detail view of the eccentrics for operating the chain-stitch devices and the stem by which said eccentrics are carried.

A is the base of the machine, designed to be screwed or clamped to atable; and B, the

arm cast in one with the base, and forming a support for the needle-bar and connected parts.-

0 is the driving-wheel revolving freely upon a horizontal stud or screw, D, projecting from the arm B. It may bedriven by a belt in its peripheral groove by a pitman from a treadle, or by a hand-crank.

- E and F are two rotary shafts connected by the pinions G G with the enlarged gear-wheel H, which is preferably cast in one with the drive-wheel C. The shaft may be driven at a high speed, since one revolution of the wheel 0 gives two or more revolutions to each shaft.

Q is the feed-bar, which is operated by cams R and R on the shaft E and a retracting- 6 spring, S, the movements of the said feed-bar being regulated by a cam-lever of ordinary construction, all as fully described in our application No. 17 9,835, filed October 14, 1885, said application being a division of this case.

The lock-stitch mechanism shown in position in Fig. 1, and details of which are shown in Figs. 4 to 11, is in general the same as is described and claimed in our pending application No.. 140,180, filed August 11, 1884, and 7 5 hence is not claimed, broadly, at this time. Various changes and improvements therein have, however, been made both in the spreader and the lower thread-holder, and these improvements are hereinafter described and claimed. So, too, the looper mechanism of Fig.

12, which, by our present improvements, may

be substituted for the lock-stitch devices in the machine to convert it into a single-thread chain-stitch machine, is in substance the same as is set forth in our pending'application No. 140,420, filed August 13, 1884, and is therefore not herein claimed, broadly.

The lower shaft, E, has its front bearing in astandard, A, extending upward from the base or frame A, said shaft projecting forward beyond a stationary eccentric, a, integral with ablock, a, fixed in said standard. To the forward end-of the shaft E is secured, by a setscrew, 0, the loop-spreader or rotary hook I), 5 having at its front edge aloop-guard, b. The shaft E is flattened slightly, as at X, Fig. 10, so that the set-screw c, fitting against said flattened portion, will insure the proper adjustment of the spreader b of said shaft. The shaft rco O tionary eccentric a.

extends beyond the eccentric a, and the said spreader'is fitted to such prolongation, while in our former application, No. 140,420, filed August 13, 1884, the spreader was provided with a spindle or stem entering and secured within the end of the shaft.

Between the guard b and the body of the spreader is a hook, cl, formed on the forward end of a small shaft, (1, journaled in the disk or rear portion of the spreader I), and having at its rear end a crank provided with a crankpin, (1 engaged by a slot, e, of an oscillating disk, e, pivoted at f, at the side of said disk opposite the slot 8, to the disk of the spreader I). The central portion of the disk 0 is cut away to form a larger slot, 0*, in which fits the sta- From this construction it will be apparent that, as the shaft E and spreader b rotate, an oscillating movement will be imparted to the disk 6 by the stationary eccentric a, the movements of said disk being imparted to the shaft d and hook 0. through the crank-pin (1*.

The lower thread is carried by a spool or bobbin, 9, inclosed in a case or bobbin-holder, 71, loosely sustained by a bobbinsupporter, t, open at its front side, and having projecting and slightly-flaring lips 41, between which the loops of needle-thread are passed to be carried over the bobbinrase, as will be explained presently.

The bobbin-supporter i is carried by an arm, j, attached by a screw, k, to the standard or block A, as shown in Figs. 1, 5, and 12. A latch, 2, extends over the bobbin-case h, to prevent the latter from being lifted out of the bobbin-supporter by the draft of the thread, and the said bobbin-case is provided on its lower side with a protuberance, m, which serves as a loop-divider and insures the passage of the loops of needle-thread under and around the bobbin-case. By loosening the nut k the arm j may be swung outward away from the spreader b for the ready insertion or removal of the bobbin-case and bobbin; or the said arm may be secured in the position indicated by Fig. 2, when the chainstitch mechanism is in operation and when the lower thread is not required.

The operation of forming lock-stitches by the mechanism just described is as follows: The needle having descended to its lowest point and risen slightly, the loop, thrown out by the needle in the usual manner,is seized by the hook (I, as in Fig. 5, and as the spreader b rotates, the said hook holds the loop, Figs. 6 and 7, so that the limbs thereof are drawn on opposite sides of the tail-piece b of the spreader, and thus at the continued rotation of the latter the said loop will be drawn between the flanges 1? of the supporter i, and around and below the bobbin-case, loosely held in said bobbin-supporter. After the loop has reached the position indicated in Fig. 7 the hook d, through the operation of the oscillating disk former application,No. 140,420.

6, as above described, will be withdrawn from the loop, which has been carried nearly around the bobbin-case, as shown in Figs. 7 and 8, so that it will be free to be drawn up and tightened, (to lock the needle and bobbin threads into the work. and thus complete the stitch,) when the next succeeding loop is being spread, as in the well-known old form of the Wheeler and Wilson machine, the guard b holding the old loop out of the way of the hook (I while the new loop is being spread.

The projecting end of the shaft E, which protrudes beyond the fixed eccentric a, as seenin Figs. 2, 3, and 11, has an axial perforation (see Figs. 3 and 10) to receive the stem or axis at of the twin eccentrics n 0, which actuate the vertical hook p and spreader q, pivoted on the stud r, Fig. 3, said hook and spreader having openings to receive said eccentrics, and being held in place by the milled nut s, as shown in Fig. 12. These devices co-operate with the vertically-reciproeating needle to form the loop or chain stitch from a single thread, in the manner fully set forth in our The parts m n oand the parts 19, q, and s are detached, and the spreader b and lower thread-holder substituted for them when it is desired to again produce the lock-stitch.

From the foregoing it will be apparent that our machine is adapted to form either the double-thread lock-stitch or the single-thread loop or chain stitch at pleasure, the devices cooperating with the needle in the formation of either of these stitches being quickly and easily changed by the operator.

lVe claim as our joint invention- 1. The combination of the shaft E, the stationary eccentric a, and rotary hook or spreader b, the shaft d, journaled in the disk of the said hook or spreader b and provided with a crank-pin, (F, the oscillating disk a, recessed to embrace said eccentric, and having also a slot for the engagement of said crank-pin, the stationary bobbin-case h, and the bobbin-supporter '1', substantially as set forth.

2. The combination, with the shaft E, the stationary eccentric a, and the rotary hook or spreader I), of the shaft d, journaled in the disk of the said hook or spreader and provided with the crank-pin al the oscillating disk 6, recessed to embrace saidcccentric and having also a slot for the engagement of the said crankpin, the stationary bobbin-case h, and the bobbin-supporter i, open at its front side and having the flaring lips '2", substantially as set forth.

3. The combination, with the rotary hook or spreader b, the oscillating hook d, and their operating mechanism, of the stationary bobbin-case h, the bobbin-supporter i, open at its front and having the flaring lips i, the latch l, and the pivoted supporting-arm j, substantially as set forth.

4. The combination,with the rotary shaft E,

having an axial perforation at its forward end, In testimony whereof we hereto affix our of the stem m, fitting in said perforation, the signatures in presence of two witnesses.

eccentrics n and 0, fixed with relation to the CHARLES F. HARLOW. said stem, and the hook p and spreader q, EDWIN E. ANGELL.

5 pivoted at their lower ends and having open- Witnesses:

ings to receive said eccentrics substantially as A. H. SPENCER,

set forth. E. A. PHELPs.

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