US1809192A - Hand sewing machine - Google Patents

Description

June 9, 1931'. R.E. CAHYILL" ET AL 1809,

HAND SEWING MACHINE Filed July 14, 1928 s Sheets-Sheet 1 Roberi .E. Cahi 22, (75727; U cflerini ATTORNEY June 9,1931. R. E. CAHILL ET AL 1,809,

I HAND SEWING MACHINE Filed July 14, 1928 3 Sheets-Sheet 2 F0587? CQhi Z2,

aaz-er/z iWEN'roR-s ATTORN'EY June 1931- R. EfcAHlLL. ET AL ,809

HAND SEWING MACHINE Filed July 14, 1928 3 Sheets-Sheet 3 lfoberz" Z. Cahi 2.2,

John Caiem' 721;

ATTOR NEY PatentedJune 9, ,1931

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nonnnr ncnmmi Ann JoHN cArnnIm. or cLnv'Emnn, onr ro mm) snwme imcnmn Application flled July 14.1928; Serial in. 292,659.

, This invention relates I of the portable type andhas for. an object the provision of a machine which is simple 1n construction, reliable in use' and may be oper- I ated by hand, the construction being such that the machine may be manufactured and sold at a low cost.

Another object ofthe invention is the provision of a sewing machine which is light in weight and may be manipulated by hand after the, manner of an ordinary 'pair of I shears, so that the machine may be easily I handled and conveniently carried" about and operated to stitch any ordinary material without undue fatigue.

Another object of the inventionis the pro;

vision of a novel stitching mechanism and a novel work feeding means,

means common to both thestitc ing mechanism and the feeding means for operating the same.

7 With the above and other objects in view, the invention further includes the following novel features and details ofconstrujction, to

be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

- In thefdrawingszj 1 q s Figure 1 is a side elevationof a sewing '30 machine constructed in accordance 'with theinvention. Figure side opposite'that shown in Figure 1.

Figure 3 is an end viewshowing the presser foot lowered and the stitch forming mechanism and the work feeding mechanism in normal position. i 1 t Figure 4 is a like view showing a difierent position of the stitch forming. and i work feeding mechanisms, the needle of thef stitch forming mechanism being in its'lowermost position while thefeedarm of the work feed- 'ing mechanism is in position to'be: disengaged from the work. I

Figurefi is a detail elevation of the stitch forming cam plate and hook; Figure 6 is anedge' view'with' a fragmentary portion of the needle above the hook.

Figure ,7 is a side elevationoof the cam to sewing machines to ether with carries a needle 18, a bindin 2 is a sideelevation looking at the plate and the feed arm of the work feeding mechanism. 1 I o p Figure 8 is a-top view of-thelatter.

Figure 9 is an enlarged fragmentary'sectional view illustrating the' formation of a stitch.

Figure 10 is a fragmentary top plan view of the outer end'of the machine. f I Figure-11 is adetail plan view of one of the guide plates.- 1

Figure 12 is a fragmentary section on the line'12-12 of Figure 3.

Referring to the drawings in detail wheredenote correin like characters of reference which 1s desponding parts, the -mach'ine signed to 11- which may be formed'of sheet end of the arm12 carries spaced upper and lower horizontally arranged plates 13 and 14,

be light in weight includes a plate metal, an arm 12extending from the plate. zThe outer and each of these plates is provided with a slot 15 extending inwardly at one end, with a slot 16 which extends inwardly at one side adjacent the other end. The slots 15 are ver tically. alignedas are also the slots 16, while.

thelslots lli accommodate a longitudinally reciprocable needle rod :17, whose lower end screw 19'being' provided for remo'vablyholding the needle in p c J position; Mounted upon each of the plates 13 and 14-.

shown in Figure 10 of the drawings, are pivotally mounted at one end as shown at 21. These plates 20 are shaped to close the slots 15 and 16 so as to provideguide openings, the guide openings at one end of the plates accommodating the *needle rod 17 while the guide openings at the other ends of the plates slidingly reeive a foot rod-22. The retaining plates are held against pivotal movement by meansof screws 23. i

' Secured to thelower end of the foot rod22 is a prcsser foot 24 which is bifurcated after the manner of the usual presser foot as shown at 25 soas to permit of thepassage'of the are retaining plates 20 ,which as needle 18 therethrou'gh. This presser foot is;

yieldinglyforced} downward .by means of a lever is pivotaly mounted as shown at 28 upon the rod 22 and carries a cam portion 29 which engages the lower plate 14 as shown in Figure 4 of the drawings and acts to hold the presser foot raised.

Rising from the inner end of a lateral extension 30 atthe inner end of the arm 12 is a post 31. This 0st accommodates a spool of thread 32, the t read passing through guides 33 and 34 at opposite sides of the needle rod and through a guide opening 36 formed in the lower plate 14 and in the retaining plate 20 which is pivotally mounted upon this'lower plate. The thread is then passed through the e e of the needle in the ordinary manner, so that when the needle rod is reciprocated in the operation of the machine, the threads will be unwound from the spool. A washer 38' is located at the lower end of the post 31 and the washer 36 is positioned upon top of the spool of thread, while a spring 37 bears upon this upper washer and is tensioned by a nut 38 which threadedly engages the post. By means of the nut 38 the tension of the threads may be regulated so that the thread Will be properly fed when the machine is in operation.

In order to reciprocate the needle rod 17, a

rocker arm 39 is pivotally mounted at 40 at the top of the plate 11 and one end of this arm has a pivotal connection 41 with the needle rod 17. p The opposite end ofthe rocker arm 39'is pivotally connected as at 42 with the up-.

per end of a rod 43, and the lower end of this rod has a pivotal connection 44 with an operating lever 45." The lever 45 is pivotally mounted upon the plate as shown at 46 and has extending therefrom a finger grip 47. Rigid with the plate 11 is an arm 48 which forms a thumb grip, so that when the fingers and thumb are engaged around the respective fin er and thumb grips, the lever 45 will be we ed upon its pivot so as to actuate the rocker arm 39 and reciprocate the needle rod. Movement of the lever45 is yieldingly resisted by means of a spring 49 which is interposed between the thumb grip 48 and the finger grip 47. A stop 50 actsto limit relative inward movement of the thumb and finger grips and consequently pivotal movement of the lever 45 in one-direction, while a stop 51 which is mounted upon the plate 11 limits pivotal movement of the lever 45 in an opposite direction.

Supported by the plate 11 is a horizontally arranged work plate 52. This plate is provided with spaced slots 53 between which is a centrally arranged slot 54for the passage of the needle. i

- Located beneath the work plate 52 and slidingly and pivotally secured to a plate 53' which depends from the work plate is a cam plate 54. This plate is provided at one end with a notch 54, which loosely receives a cam plate 54 will have a sliding pivotal movement on the screw. The plate 54 is provided with a lateral extension 56 and secured to this extension are spaced parallel arms 57. The upper edges of these arms are toothed as shown at 58 and these teeth are adapted to move into and out of the slots 53 when the plate 54 is operated.

In order to move the plate 54, the latter is provided with a cam slot a within which extends a stud 56a which projects from the end of the operating lever 45. This stud also projects through an opening in the plate 53 and when the lever 45 is moved pivotally, this stud will engage the edge 59 of the cam slot 55a and move the cam plate in the direction of the arrow shown in Figure 3 of the'drawings.- The plate 54 will drop by gravity so that the movement will be forward and downward as shown in Figure 4. The feed arms 57 will thus move out of their slots 53 and will be disengaged from the work upon the work plate. As the arm 45 moves upward, the stud 56a engages the edge 60 of the slot 55a so that the plate 54 is moved rearwardly and when. the said stud engages the inclined upper portion 61 of this slot, an upward and continued rearward movement of the plate is effected so that the teeth of the arm-s 57 will engage the work and move the latter rearwardly.

Pivotally mounted upon the plate 53 as shown at 62 is a cam plate 63. This plate is provided with a cam groove 64 into which the stud 56a also extends. The plate 63 has secured to its outer face a loop forming hook. This hook is of sectional formation and com prises a lower section 65 which is rigid with the plate as shown at 66, while the bill end 67 of the hook is carried by a spring finger 68 whose lower end is rigid with the plate 63. As shown in Figure 6 of the drawings, the pointed end of the needle in its downward movement will engage the outer face of the bill end of the hook so that this end of the hook may move inward toward the plate 63. In the use of the machine, the presser foot is raised through movement of the lever 27 as previously explained, the needle being threaded, the work is positioned upon the work plate beneath the presser foot and the latter is lowered so that the work is engaged by both the presser foot and the feed arms 57. Upward pivotal movement of the oper ating lever 45 will, through the rocker arm 39 and the connecting rod 43, force the needle downward through the Work. In its down ward movement, the point of the'needle will forcethe bill 67 of the hook 65 inward toward the plate 63 against the tension of the spring 68. Continued movement of the operating lever will move the cam plate 63 to the left of the position shown in Figure 3 of the drawings, carrying with it the hook.

screw 55 carried by the plate 53', so that the Movement of the operating lever in an opposite direction under the action of the spring 49 will move the needle upward and the hook will move from the position shown in Figure 4 to the position shown in Figure 3, so that the bill will pass between the inside of the needle and the thread and the latter will be looped around the bill as shown in Figure 9 p of the drawings. The next downward movement of the needle will cause the latter to enter this loop, and as the hook will again move to the position shown in Figure 4: during downward movement of the needle, the previously formed loop will be withdrawn from the bill of the hook. When the hook again moves to the position shown in Figure 3 of the drawings, a second loop will be formed through which the needle will pass in its next downward movement. A chain stitch will thus be provided.

The upper edge of the cam plate 63 is beveled as shown at 69 so as to permit the feed arms to move downward as shown in Figure 4 of the drawings, and when the cam plat-e 63 moves from the position shown in Figure 4 to that shown in Figure '3, the high point on the cam plate 63 will engage the under edge of one of the feed arms 57 and assist in moving the latter upward. The cam plate 54 moves downward by gravity.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention what is claimed is: r v

1. In a sewing machine, a plate, an arm extending therefrom, a needle carrying rod mounted for longitudinal reciprocatory movement at the outer end of the arm, a spring influenced rod also mounted for longitudinal movement at the outer end of the arm, a presser foot carried by the spring influenced arm, means cooperating with the presser foot to feed the work, a lower stitch forming mechanism, an operating lever mounted for pivotal movement upon the plate, a rocker arm also pivotally mounted upon the plate and operatively connected to the carrying rod, a rod connecting the operating lever and rocker arm to actuate the latter and operate the needle, and means carried by said lever and engaging both the work feeding means and the lower stitch forming mechanism to operate the same.

2. In a sewing machine, a plate, an arm extending therefrom, a needle carrying rod mounted for longitudinal reciprocatory movement at the outer end of the arm, a spring influenced rod also mounted for longitudinal movement at the outer end of the arm, a presser foot carried by the spring influenced arm, means cooperating with the' presser foot to feed the work, a lower stitch forming mechanism, an operating lever mounted upon the plate, means operatively connecting said lever and the needle carrying rod to actuate the latter, a movable cam plate connected with the work feeding means to operate the latter, a cam plate connected with the lower stitch forming mechanism and means carried by the operating lever and engaging both cam plates to operate both the workfeeding means and the lower stitch forming mechanism.

3. In a sewing machine, a work plate, a thread carrying needlemounted for reciprocatory movement through said'plate, a cam mounted for movement beneath the plate, a hook carried by the cam and having a laterally flexiblevbill located in the path of and flexed by engagement with the needle, said hook being arranged for passage between the needle and thread when the needle is reciprocated, means to reciprocate the needle. means to feed the work step by step during reciprocatory movement of the needle, and

-means to move the cam.

In testimony whereof we aifix our signatures.

ROBERT E. CAHILL.

JOHN CATERINL I loo I

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