US954553A - Trimming mechanism for sewing-machines. - Google Patents

Description

J. P. WEIS. GHANISM FOR SEWING MACHINES.

TRIMMING MB APPLICATION FILED MAY17. 1907.

Patented Apr. 12, 1910.

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(I. P. WEIS. TRIMMING MECHANISM FOR SEWING MACHINES. APPLIOA'I'IOM FILED MAY 17, 1907 954,553. Patented Apr.12,1'910.

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I J. P. WEIS. TRIMMING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY 17, 1907.

Patented Apr. 12, 1910.

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J. P. WEIS. TRIMMING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY 17. 1907.

Patented Apr. 12,1910

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JOHN P. 'WEIS, OF NYACK, NEW YORK, ASSIGNOR TO METROPOLITAN SEWING MA- CHINE COMPANY, OF NYACK, NEW YORK, A CORPORATION GF NEW YORK.

TRIMMING MECHANISM FOR SEWING-MACHINES.

T 0 all whom it may concern:

Be it known that 1, JOHN P. WVnIs, a citizen of the United States, residing in Nyack, county of Rockland, and State of New York, have invented a new and useful Improvement in Trimming Mechanism for Sewing- Machines, of which the following is a description.

This invention relates to trimming mechanism, and particularly to piercing trimmore, such as are adapted for cutting or trimming one, or more, of several superposed pieces of material.

Among the objects of my invention may be noted the following: to provide a trimming and sewing mechanism whereby one of two pieces of superposed material may be trimmed or out according to a suitable pattern or shape, and the piece or body portion of the part thus trimmed may be secured or stitched to the piece against which it lies; to provide a stitching and trimming mechanism by means of which applique work may be produced, the trimming mechanism being capable of trimming the applied piece of material along any given line or pattern, and the stitching mechanism being capable of securing said applied piece to the supporting piece of material and at the same time cover its edges by an ornamental stitch; to provide a piercing trimmer by means of which one or more pieces of superposed fabric may be cut or trimmed, and the trimmed pieces simultaneously stitched together; to provide a sewing and trimming mechanism by means of which any given thickness of material may be trimmed or cut and simultaneously applied to a foundation or supporting fabric; to provide means whereby, during the operation of cutting and stitching superposed pieces of fabric, the piece of fabric which is being trimmed may be raised or lowered relative to the cutting edge of the trimming attachment, whereby to compensate for the thickness of the said fabric being cut; to provide means whereby a piercing trimmer can be applied to practically any type of machine, irrespective of the character of its stitch-foaning mechanism; to provide a trimming mechanism of the kind referred to whereby, during the operation thereof, the same may be thrown into and out of action at the will of the operator in accordance with any predetermined design with reference to the character of work Specification of Letters Patent.

Application filed May 17, 1907.

Patented Apr. 12, 1910.

Serial No. 374,275.

to be produced; to provide a trimming mechanism, whereby, during the operation thereof, compensation may be made for the passage of varying thicknesses of material to the trimming blade, thus enabling the operator to control with accuracy the cutting or trimming operation, according to the thickness of the material being acted upon; to provide means for trimming and cutting fabrics whereby adjustments may be made of the trimming device with reference to the edge of the work, thus enabling the cut-ting or trimming to be performed at any desired point in the body of the work; to provide means whereby the trimmer blade of a cutting and trimming attachment may be adjusted relatively to the ledger blade thereof, so as to compensate for wear on the latter; to provide a combined sewing and trimming machine, which maybe used either as a sewing machine without a trimmer, or as a trimming and sewing machine adapted for producing applique work of all kinds and simultaneously producing ornamental stitching along the line of trim; and to provide a trimming or cutting device by means of which any given line of trim, or cut, or pattern can be followed, either in the body of the work or on or near the edge thereof, the operation being performed upon one or more of several superposed pieces, and by either first piercing said pieces or running its point between the same.

With the above objects in view, and others which will be detailed during the course of this description, my invention consists in the parts, features, elements, and combinations of elements and mechanisms as hereinafter described and claimed.

In order that my invention may be clearly understood, 1 have provided drawings illustrating a practical form thereof, and in said drawings:

Figure 1 represents in elevation so much of a sewing machine as is deemed necessary to illustrate my invention, the said figure showing the head of the machine, together with the trimming mechanism in position and in cooperative relation to the needles of the stitch-forming mechanism; Fig. 2 is a perspective view calculated to show merely the trimming mechanism and its location in the machine with reference to the needles of the stitch-forming mechanism, the clothplate of the machine being removed and the looper mechanism being omitted in order to avoid confusion of parts; Fig. 3 is a top plan view of the trimming mechanism detached from the machine, but including a portion of the driving-shaft so as to illustrate the manner in which the trimming mechanism is actuated; Fig. 4- is a. side elevation of the parts shown in Fig. 3; Fig. 5 is a sec tion on the line 55 of Fig. 3, the arrow indicating the direction of sight, this View illustrating merely the means for adjusting the trimmer blade relatively to the ledger blade; Fig. 6 is a view partly in section and partly in elevation, illustrating the adjusting screw and binding nut shown in Fig. 5; Fig. 7 is a side elevation of the supporting frame of the trimming mechanism, a portion of the bed-plate of the machine being shown in section; Fig. 8 is a top plan view illustrating in detail the means for adjusting the work manipulator which cooperates with the piercing trimmer; Fig. 9 is a side elevation of the parts shown in Fig. 8; Fig. 10 is a view showing in side and front elevation the stationary or ledger blade of the trimming mechanism; Fig. 11 is a side and front elevation of the trimmer blade; Fig. 12 is a perspective view showing the bottom of the resser-foot, portraying the features thereof which enable it to cooperate with the trimmer and the fabric manipulator; and Fig. 13 is a top plan view of the throat-plate used in connection with the trimming mechanism of my invention.

Referring to the drawings, the numeral 1 indicates the bed-plate of the machine, 2 the drivingshaft, 3 the clotl1plate, a the head of the machine in which reciprocates the needle bar 5, carrying, in this instance, two needles 6 side by side. The looper which cooper ates with the two needles has not been illustrated, in order that the parts of the trimming mechanism may not be confused there with, and since it is unnecessary to a proper understanding of the machine, it being well understood and known that a single threadcarrying looper cooperating with the two needles will produce a three-thread loopstitch with two lines of straight stitching appearing on the top of the work, and a'line of zigzag stitching or cross-loops of thread on the bottom of the work.

In the head of the machine the presser-bar 7 operates, said bar carrying at its lower end, as usual, apresser-foot 8, the details of which, with reference to my trimming mechanism, will presently be disclosed. The needle-bar is actuated by means of the usual vibratory lever 9, connected at its forward end to said needle-bar by means of a link 10 and the head 11 clamped to said bar. The needle-lever 9, as is well known, is actuated by an eccentric driven by the main shaft 2. The feed-bar 12 is actuated by the feed-rocker 13, Fig. 2, journaled at its lower end in extensions 14:, of the bed-plate of the machine, said rocker being actuated, as is usual, from a connection with the driving-shaft, this connection not being shown, since it is of no importance to my invention, and also because it may be of any usual form. The feedrocker gives the longitudi' nal reciprocating or feed movements to the feedbar 12, which latter is given its rise and fall through the medium of an eccentric, carried by the driving-shaft 2, surrounded by a strap 15, suitably connected to the feed-bar 12, this also being a common construction and the details of which have been omitted. In this connection it suffices to say that the feed-bar is given the usual four-motions by the usual mechanism. The feed-dog carried by the forward end of the feed-bar 12 is, in this instance, provided with the outer serrated bar 16 and the inner serrated bar 17, arranged parallel with each other, and separated sufficiently to admit between them the ledger and trimmer blades, together with the fabric manipulator of the trimming attachment. The feed-dog is also provided with a short serrated bar 18, lo cated in rear of the needles and between the two serrated bars 16 and 17, and in. rear of the trimming mechanism, the details of which latter will be presently set forth.

With reference to Figs. 1 and 12, it will be seen that the presser-foot 8 is provided with the usual shank 19, centrally bored at 20 to receive the Presser-bar, and being clamped to the latter in usual manner. The foot-portion, on its bottom, is provided with the longitudinal groove 21, which extends from the front of the needle apertures 22, to the upturned toe of said foot, the said groove being substantially centrally located and sufficiently deep to receive the ledger and trimmer blades, together with the several thicknesses of the work and the fabric manipulator heretofore referred to. The central groove leaves on opposite sides, at the edges of the foot, the solid portions 23 and 2%, which cooperate, respectively, with the serrated bars 16 and 17 of the feed-dog, while the rear serrated bar 18 of the feeddog cooperates with the solid portion 25 of the foot, which extends between the needle apertures 22, and to the rear of the said foot. Thus, the feed-dog and foot cooperate to feed the work through the machine and to properly grip and hold the work for the penetration of the needles and for the operation of the trimming mechanism. The toe of the presser-foot is also provided with the short slot 21 extending through the thickness of the foot from the top of the groove 21, and said slot 21 being located substantially in line with the outer of the needle apertures 22, so as to be substantially in line with the outer of the needles 6 and the line of cut of the blades of the trimming mechanism, see Fig. 1. This slot has the important function of allowing the operator to keep in sight the line of the pattern or trim along which the trim or cut is progressing or should progress, so as to properly manipulate the work for the trimming and stitching operations. Hence, said slot 21 may be properly termed a gage-slot or sight- 'age.

6 To properly support the work around the stitching and feeding positions, the throatplate 26 is provided, which, as shown in Fig. 13, has the inner longitudinal slot 27, in which operates the serrated bar 17 of the feed-dog, and with the outer longitudinal slot 28, in which operates the serrated bar 16 of said feed-dog, said slot 28 being enlarged at its front end, as indicated at 29, for the reception of the trimmer and ledger blades and the fabric manipulator of the trimmer mechanism. Between the two slots 27 and 28 a solid portion 30 is provided, which receives the pressure of the plain portion 24 of the Presser-foot. The central solid portion 30 of the throat-plate is provided with the needle apertures 31 and in rear thereof with the slot 32, through which operates the short serrated bar 18 of the feed-dog, the provision of the said slot 32 producing the supporting tongue 33 between the needle apertures and in rear of the stitching position, whereby the fabric cannot fall, or become depressed, through the throat-plate at or around the stitching position.

t will be seen, upon referring to Figs. 1 and 2, that the trimming and fabric manipulating parts of the trimming mechanism are located and operate substantially in line with the outer one of the needles of the stitch-forming mechanism, the inner of said needles being, in consequence, arranged beyond the line of trim or cut of the trimming mechanism. Hence, it will be understood that, as the trimming and stitching progress, the lower thread of the stitch will be applied across the trimmed edge, one needle penetrating the fabric substantially in line with the cut or trim, or just at one side thereof, and the other needle penetrating the fabric the distance from the trim or out which separates the two needles.

The trimming mechanism is supported by a bracket which, in the instance shown, Fig. 7, is substantially L-shaped, and the lower portion of which is indicated by 34, and the other, or vertical, portion of which is indicated by A clamping-screw 36 passes through the lower portion 34 into the bottom of the bed-plate, thus securing said bracket in position, and the head of said screw being let into the bracket, as indicated at 37. The face of the vertical portion 35, is provided with the laterally adjustable gageplate 38, held in position by the clampingscrew 39, passing through an elongated slot 39 in said plate and tapped mto said bracket, said plate being provided with the end projections 40, Fig. 1, providing between them a recess through which the frame of the trimmer, generally indicated by 41, may be passed into position against the face of said bracket portion 35, the latter being provided with the seat 42, upon which rests the said trimmerframe 41. The trimmer-frame 41 consists of the two oppositely disposed, vertically extending, journal-bearing portions 43 and 44, Figs. 1 and 2, joined at their lower end by the web or body-portion 45, the lower edge of which is shouldered, as at 46, to rest upon the seat 42 of the bracket, the projections 40 of the latter thus overlapping the side edges of the said body-portion and preventing any relative lateral movement of the trimmerframe. The seat 42 of the bracket is more extensive than the shoulder 46 of the trimmerframe so as to provide for adjustment of said frame on said bracket to properly position the said frame and its mechanism relatively to the needle. The body-portion 45 of the trimmer-frame, at its back, is provided with a transverse rib 41 which is received in the groove 35 of the bracket, this construction helping to hold the relation between the frame and bracket and properly position the one in the other. The said body-portion 45 of the trimmer-frame is also provided with oppositely extending lugs or pins 47 which cotiperate with latches 48, pivoted at 49 on opposite sides of the vertical portion 35 of the bracket, said latches being provided with the cam-notches 50, Fig. 7, which cotiperate with the said pins 47, to draw the frame 41 against the bracket and securely lock the two together, said latches being provided each with the handle 51, which, it will be noted, extends toward the front of the machine into position such that it may be readily manipulated by the operator, so as to detach the trimming mechanism from the machine, or place it in the machine when required. It will thus be seen that the trimmerframe, and, consequently, the trimming mechanism, is controlled, maintained and adjustably held by several distinct devices or means. The journal-bearing arm 44 of the trimmer-frame is provided with the elongated, rearwardly extending portion 54, which is provided with a diagonal groove, in which is set the stationary or ledger-blade 55 of the trimming mechanism, this blade being adjustable in the said groove by means of the clamping screws 56, the shanks of which pass through the elongated slots 57, in said extensions 54, shown by dotted lines in Fig. 9, the said ledger-blade being thus capable of adjustment to the desired extent relatively to the surface of the cloth-plate, and with reference to the movement of the trimmer-blade. 1n the said arms 43 and 4st of the trimmerframe, is journaled the trimmer rock-shaft 58, the bearing in the arm 4-4 being of a size to receive the same snugly, while the bearing in the arm 43 is enlarged and screwthreaded for the reception of the adjustable bearing-screw 59, the latter being centrally bored for the reception of the said rockshaft 58, as clearly shown in Figs. 5 and G. The said bearing-screw is provided with the head 60, and at its opposite end receives the clamping-nut 61, the said nut and head being arranged on opposite sides of the arm 43. Upon the rock-shaft 58, adjacent the head 60 of the journal-screw 59, is set the lever 62, which carries the trimmerblade 63, the latter being secured to the outer end of the lever by means of the screw Get passing through said lever and tapped into the shank of the said blade. The upper edge of the blade 63 is sharpened to a cutting edge which, preferably, is inclined as shown at 66, so as to have a shearing action in cooperation with the ledger-blade which latter is provided at its upper end with the head 67, notched as at 68, and formed so as to produce the forwardly and upwardly extending piercing point and to have the inclined cuttingedge 70, which overhangs its shank as clearly shown in Figs. 4 and 10. Thus, the ledger-blade and trimmer-blade are formed to cooperate the one with the other and have a shearing action upon the work, which latter is first penetrated by the point 69, and then enters the notch 68, where it will be acted upon by the trimmer-blade 63; or, the said point 69 will enter between the two superposed pieces of fabric and receive the lower piece within its notch 68, where it will be subjected to the action of the trimmerblade 63, as before stated. The trimmerlever 62 is provided with the enlarged tubular portion 62, fixed upon the rock-shaft 58 y means of the set screw 71, the said lever thus being movable, with said rock-shaft both axially and longitudinally. The said enlarged portion 62 of the trimmer-lever is located beside the head 60 of the bearing 5 The end of the rock-shaft 58, adjacent the bearing-screw 59, has fixed upon it the actuating lever 72, by means of the set-screw 78, said lever at its lower end having journaled upon it the rod 7st, the connection of which, with the said lever, is indicated by 7 5, and the connection being formed by having the head of said rod bifurcated and receiving in the crotch thereof the lower end of said lever, and the two parts being held together by means of the set-screw 7 6 passing through lever 72 and tapped into journal-pin 7 5.

The driving-shaft 2 is provided with an eccentric 77, surrounded by a strap 78, having the tubular extension 79, which receives the rod 74 within it telescopically, said eX- tension 79 being provided at its free end with the clamp-collar 80, having projecting from one side the pin 81, which cooperates with the bell-crank latch-lever 82, pivotally connected to the actuating lever 72, the arm 83 of which latch-lever extends toward the front of the attachment so as to be accessibly presented to the operator, whereby he may manipulate the same to make and break the connection between the eccentric strap and the trimmer-blade actuating lever 72. Thus, the trimmerblade 63 is actuated from the driving-shaft of the machine by means of a detachable operating connection, and thus also the entire trimming mechanism may be removed from the machine, and readily attached to the latter as desired. lVhen the latch-lever is lifted from connection with the pin 81, the rod 7% is instantly forced toward the open end of the tubular extension 79 by means of a spring 7 9 contained in said extension, which results in throwing the actuating lever 72 outwardly and the trimmerlever downwardly, this action also carrying the latch-lever away from said pin 81. To iaintain said. latch-lever 82 in any position on its pivot, av spring washer 74- is placed in engagement with one side of'said lever, see Fig. 1, said washer being held in place by the screw-head 74 tapped into the journalpin 75. Thus, the latch-lever is prevented from having too free movement on its fulcrum and will be, when lifted to disengage the pin 81, maintained inoperative, and out of the way of said pin so that the latter may not, during rapid operation of the machine, strike the latch-lever, thus avoiding damage to connecting parts. To prevent said latchlever from being moved too far in either direction around its pivot, a stop-pin 81 is projected from the side of the actuating lever so that the arms thereof will engage the same in either direction and the lever will be thereby limited in its movement and held in such position that its arm 83 may be readily grasped at all times by the operator.

The face of the trimmer-frame has applied thereto the plate Sd, by means of screws 85, and rigidly secured in said plate is the pin 86, upon which is journaled the sleeve 87, the outer end of which is enlarged and knurled as at 88, and the face of which is beveled as at 89, and to which beveled face is applied a scale, which extends circumferentially thereof. The head of the sleeve is depressed, as shown in Fig. 1, and in said depression is set a plate or washer 90, provided with a pointer 91, which cooperates with the scale on the beveled face 89 of the sleeve. the said sleeve and washer being retained in position by means of the set-screw 92, with freedom of the sleeve to turn upon the ournal-pin 86, while the washer, with its pointer, is held rigidly to the outer end of said journal-pin by means of the said clamping-screw 92.

The shank of the sleeve 87 is provided with the cam 93, which is formed as one turn of a screw, substantially, and which cooperates with the bifurcated end 94- of a vertical arm 95 of a bell-crank lever, the horizontal arm 96 of which is extended rearwardly toward the trimmer-blade and which is bent upwardly and curved, as shown at 97, and which terminates just under the piercing point of the ledger-blade of the trimming mechanism and just in front of the place of operation of the trimmer-blade. Thus, it will be seen that, by rotating the sleeve 87, the fabric manipulator 97 may be raised and lowered relatively to the point of the ledger-blade of the trimming mechanism, so as to raise and lower the fabric, against the bottom of which it operates, with reference to the cutting edge and the notch 68 of said ledger-blade. The functional cooperation of these parts will be presently described. The trimmer-frame is provided with the support 98, located directly under the trimmer-lever 62, so that, when the latter is thrown out of operation, it will drop into a posit-ion of rest on said support 98'at ,the operative position, and out of the way of the fabric or work passing over the clothlate.

Having set orth the details of my invention, the following mode of operation and cooperation of the several parts will be readily understood. Assuming that the driving-shaft 2 is given continuous rotation, and that a single thread-carrying looper cooperates with the two needles to make a stitch of well-known character embodying two straight lines of stitches on the top surface of the work and an ornamental crossloop stitch on the bottom surface of the work, and that the fabric manipulator has been adjusted with reference to the piercing point of the ledger-blade of the trimming mechanism so as to properly present the work to said trimming mechanism, it will be understood that, when two pieces of work are superposed and passed through the ma chine by the combined operation of the feeding and presserfoot mechanisms, any given pattern or line of trim or out can be followed. The cutting or trimming takes place in advance of the stitching and substantially in line with the outer of the two needles, viz., the one on the left. Hence, the inner of the two needles, or the one on the right, penetrates the body of the work a distance from the line of trim equaling the distance separating the two needles, while the outer of the two needles or the one on the left will work so close to the trimmed or cut edge as to cause the looper-thread, when interlooped with the thread of said outer needle, to completely cover the cut or trimmed edge of the material. As the work is passed through the machine and under the presser-foot, it lies on and passes over the fabric manipulator which causes that particular portion to be so presented to the point of the ledger-blade of the trimming mechanism that said point will pierce the lower piece of work or enter between the lower and upper pieces of work, and said ledger-blade will, in cooperation with the trimmer-blade, trim or cut the said lower piece of work. Simultaneously with this trimming or cutting operation which progresses along any predetermined line, the stitch-forming mechanism lays the crossloop of looper-thread over the trimmed or cut edge of the work, thus completely holding the same closely in contact with the upper piece of work and giving an ornamental finish to said trimmed or cut edge. Obviously, any number of pieces of work, within the capability of the trimming mechanism, can be operated upon simultaneously and one or more pieces of said work can be cut or trimmed along any given pattern lines. According to the thickness of the work presented to the trimming mechanism, the fabric manipulator will be correspondingly set or adjusted so as to enable the said thickness to pass properly onto the point of the ledger-blade, and said point having once penetrated the said material, the latter is carried directly under the cutting edge of said ledgerblade and into position to be operated upon by the trimmer-blade, the two said blades having a shearing action and, between them, making a clean cut. The trimmer-blade, as will be understood, operates from below up through the cloth-plate, 105 while the ledger-blade stands permanently a certain adjusted distance above the surface of the cloth-plate; and, at any time during the operation of the machine, the operator can adjust the height of the fabric manipu- 110 lator with reference to the point of the ledger-blade by simply turning the adjusting sleeve, which carries the cam which actuates said fabric manipulator, and the amount of elevation of said fabric manipu- 115 lator can be regulated by the scale upon the face of the said adjusting sleeve.

As will be readily understood, the entire trimming mechanism can be detached from the machine by simply raising the two 120 latches arranged on opposite sides of the trimmer-frame and which hold the latter firmly against the trimmer bracket. Also, at any time during the operation of the machine, the operator can throw the trimming 125 device into and out of operation by manipulating the bell-crank latch-lever which connects the eccentric strap with the trimmeractuating lever, the lifting of the latch enabling the spring in the telescopic connec- 130 tion to expand and throw the said actuating arm outwardly toward the operator, thus rocking the shaft and lowering the trimmer-blade which will come to rest upon the support directly under the same and which forms a part of the trimmerframe. I'Vhen it is desired to throw the trimmer mechanism into operation again, it is only necessary to push upon the lower end of the trimmer-actuating lever, thus compressing the spring within the eccentric strap and thus placing the latch in position to be dropped over the pin carried by the collar on the outer end of said strap. The operation is simple and easy for either throwing the trimmer into or out of action and the speed of the machine forms no impediment to this operation, since the latchlever is accessibly presented to the operator.

It will be readily understood that this invention is not limited in its application to a two-needle machine, nor to a machine of the type hereinabove referred to, and that the trimming mechanism can be applied to practically any kind or type of machine wherein it is desired to cut the lower piece or pieces of fabric of several superposed pieces. Furthermore, it will be readily understood that the trimming mechanism is not limited to this particular class of work, since a single piece of thick or thin fabric can be trimmed with facility, it being only necessary to adjust the fabric manipulator in such manner that the same may be carried into the notch or throat of the ledger-blade as it is fed through the machine, and it will also be readily understood that, by simply adjusting the fabric manipulator, the work can be raised above the point of the ledgerblade of the trimming mechanism, thus preventing said point from penetrating the fabric and preventing the latter from being engaged by the trimming devices, thus instantly eliminating the cutting function of the machine and enabling simply stitching to be produced. This can be done at any time during the operation of the machine and at the will of the operator by merely rotating the sleeve which carries the cam for actuating the fabric manipulator, whereby to adjust the latter to the proper position relatively to the point of the ledger-blade. The groove in the bottom of the presserfoot receives the trimming and fabric-manipulating devices and thus no impediment is presented to the passage of the work through the machine, whether the trimmer be in operation or not.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a sewing machine, and in combination with the over-stitching mechanism thereof, a trimming device comprising a supporting bracket and means for rigidly securing it to the bed-plate of the machine, a holding bracket and means for detachably connecting it to the other bracket, a lever journaled upon the holding bracket, means for actuating said supporting lever including a detachable device, a trimmer-blade secured to the lever, a stationary cooperating blade, and a fabric-lifting device arranged in advance of the trimmer-blades.

2. In a sewing machine, and in combination with the over-stitching mechanism thereof, a bracket and means for rigidly securing it to the bed-plate of the machine, a holding bracket detachably secured to the first-mentioned bracket, a lever journaled in the holding bracket, means for actuating the lever including a detachable connecting device, a trimmer-blade carried by the lever, a stationary blade cooperating with the trimmer-blade, means for adjusting the two blades relatively, and a fabriclifting device arranged in advance of the trimmer-blades.

8. In a sewing machine, and in combination with the over-stitching mechanism thereof, a bracket and means for rigidly securing it to the bed-plate of the machine, a holding bracket detachably secured to the first-mentioned bracket, a lever journaled in the holding bracket, means for actuating the lever including a detachable connecting device, a trimmer-blade carried by the lever, a stationary blade cooperating with the trimmer-blade, means for adjusting the two blades relatively, a fabric-lifting device arranged in advance of the trimmer-blade, and means for regulating the position of the fabric-lifting device relatively to the trimmer-blades.

4. In a sewing machine, and in combination with the over-stitching mechanism thereof, a trimming-device comprisin a stationary and a movable blade, a holdingbracket for supporting the trimming mechanism, a supporting-bracket and means for detachably coimecting the same to the hold ing bracket, a fabric-lifting device arranged in advance of the trimmer-blades, and means whereby the movable trimmer-blade may be thrown into andout of action during the operation of the machine at the will of the operator.

In testimony whereof I have hereunto signed my name in the presence of two sub scribing witnesses.

JOHN P. I/VEIS. Witnesses FRITZ BnNDnR, ANNA C. VAN HOESEN.

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