US1243089A - Sewing-machine. - Google Patents

Description

l. M. MEREOW.

SEWING MACHINE.-

APPEICATION mm our. 19, m5.

Patanted Oct. 16, 1917.

2 SHEETS-SHEET I.

INVEN'TU Hrs A nguev's J. M. MERROW.

SEWING MACHINE.

APPLICATION nuzo OCT. 19. 1915.

Patented Q01}. 16, 1917.

2 SHEETS-SHEET 2.

magma TTD NEYS.

pads are made up of rinirrnn snares earner enrich;

JOSEPH M. MERROW, 0F HARTFORD, CONNECTICUT, ASSIG-NOR TO THE Ii'IEPvROW MACHINE COMPANY, OF HARTFORD, CONNECTICUT, A

NECTICUT.

CORPORATION OF CON- SEWING-MACHINE.

Patented Get. in, 1917.,

Application filed Catcher 19, 1915. Serial No. 56,700.

To all whom it may concerns Be it known that l, Josnrrr M. Msnnow, a citizen of the United States, residing at Hartford, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the figures and letters of reference thereon.

This invention relates to mechanism for facilitating the stitching of circular work. As an example of such work, pads employed for applying cosmetics may be cited. These disks of soft leather, as chamois, preferably secured together at their edges by overstitching. Itis highly desirable that the finish thus provided be neat and attractive in appearance and effected at a speed impracticable to attain without special appliances. The provision of such appliances is primarily the object of my invention, which as will hereinafter appear possesses many features of advantage each in itself a further attained object.

In the drawings accompanying and forming a part of the present specification I have shown in detail and in. connection with a Morrow overstitching machine one convenicnt form of embodiment of my invention. It is to be understood, however, that any suitable type of stitching mechanism be substituted for that shown and described, although overseaming mechanism is considered desirable and the latter is believed to be most useful for the particular work herein set forth.

Referring to the drawings Figure 1 is a front view of a Morrow ovcrstitching machine embodying the present invention, certain of the parts being shown in section. and the work showing in section on line 11of Fig. 2.

Fig. 2, is a plan View of the work plate and needle plate of the machine shown in Fig. 1, together with other adjacent parts.

Fig. 3, is a sectional view on line 3-3 of Fig. 2 and,

Fig. 4:, is an end view of the machine with certam parts swung to a different position from that in which they are shown in Fig. 1.

Similar characters of reference designate 8, for the upper looper 2, said carrier having" laterally extending arms 9 and 10, provided with roll bearing studs 11 and 12, adapted respectively to enter grooves 13 and 14, in cam cylinders 15 and 16, supported by shafts 17 and 18. Gears 19 and 20, connect the two cam cylinders which aresecured by set screws 21 and 22, to their respective shafts, so that when the driving shaft 17, is rotated the cam cylinders and shaft 18, will rotate in unison therewith. As said cam cylinders rotate the correlated grooves therein move the arms 9 and 10. This motion of said arms, transmitted through the upper looper carrier and slide 1, causes looper 2, to reciprocate below the needle plate, and looper 3, to reciprocate and oscillate so that it passes above and below the needle plate, in a curved path extending around one edge thereof. The needle moves to cooperate with the lower looper below the needle plate and with the upper looper above the needle plate, and the loopers move to cooperate with each other below the plane of the needle plate, all in accordance with a well known method of forming overedge stitches. The needle receives its motion through the link 23, which connects the needle carrier 24, with an eccentric projection 25, at the end of shaft 18.

Mechanism comprising the present invention as associated with the stitch. forming mechanism briefly set forth above will now be described.

Supported by a flangedlug 30, projecting from the machine frame 7, is a work plate carrier 31, to which is secured by screws 32, the work plate proper 323. Passing through. these two last mentioned members and serving to hold them for swinging motion upon their support, is a headed pivot pin 34, clamped against longitudinal movement work plate by screws 41. The upper surface of disk 37 is flush with the like surfaces of the work plate and needle plate, so that.

when the work plate is swung to the position in which it is shown in Figs, Land 2-, the surfaces of all of said members are effective for supporting the work. The workiplate is cut away to accommodate the turntable, and also, on that side which is toward the needle plate, it is shaped to conform to thelatter. Secured to the workplate at that side of the turntable opposite to the needle plate, is a locating member 45, which comprises a plate having a semi-circular recess 46, which forms a guide by which to centralize the work upon theturntable. That it may accommodate different sizes of Work, this guide member is adjustable. Also it is provided with a curved projection '47,.by

which the work plate and associated .parts may be conveniently positioned as required. For reasons that will become hereinafter more fully apparent, it isdesirable to maintain the'work in fixed relation to the turntable, and clamping means for the purpose will now be described. 'The work plate carrier 31, is provided with a boss 50, tapped to receive the screw stud 51, which pivotally supports the L-shaped arm 52. Riveted or otherwise secured to thefree end of this arm 52,.is a cylindrical'head 53, formed with a button 54, at one end and reduced to form a round pointed pin 55, at the "other end. A clamp disk 56, having a shank 57, is provided with a'bore 58, to very freely receive the pin 55, the rounded point of the latter being adapted to engage the bottom of the bore and press the clamp disk-against the work, said disk at the same time being perfectly, free to turn with the work clamped between it and the turntable. Oppositely disposed halves 59 and 60, of an inwardly flanged thimble-shaped member are secured as b screws 61, to the head 53,

with the flange 2, in engagement with an annular groove 4, in'the clamp d-isk shank. The relative p sition of said flange 62, length of pin 55, depth of bore 58, and width of groove 64, o viously insure confinement of effective pre ure contact upon thedisk,

to the rounded oint of the pin and bottom of the'bore. S ch contact is. desirable, inasmuch as it pe mits the clamp disk, as be convenient hold, by which said clamp may 1- be rotated by the operator, toinitially move the work into proper position withrespect to the stitching mechanism. As w ll have been inferred, the L-shaped arm 52, is man-- ually movable about its pivot, to permit the clamp disk to be moved into a position adjacent to the work plate, as shown in Figs. 1 and 2, or away from the work plate, as shown in Fig. 4. It is convenient to have this arm frictionally held at its pivotal joint, so that it will slightly resist displace '.ment from the various'positions to which it is adjustable. A friction washer as 66, of leather or othersuitable material, introducedunder the head of screw stud 51,- accomplishes this end, and, for present purposes, is found more useful and convenient than a spring acting upon the arm. The degree of friction exerted upon'said arm,

may be regulated by adjusting the screw stud, which latter may be held in a desired adjustment by a set'screw, as 67, tapped into the boss 50.

When in clamping relations, the .clamp disk 56, is-axially alined with the turntable 37, so that these two members, together with' the work firmly secured between them, are perfectly free to be rotated by feed devices, to advance the peripheral margin of the work to the stitching mechanism.

In connection with the feed dog 68, which operates in the usual way through the needle plate, I prefer to use a rotary or wheel presser foot as illustrated. Such a device "forms the subject of Un-ited States Patent- #1,001,388 granted to H. ,B. Gould, August 22nd, 1911, and therefore need not here be described at length; It will suffice to state,

that the presser foot 70, which has-a small work engaging area, co-active with the needle plate to prevent backward movement of said work during retraction of the feed dog, and

to facilitate the control of the edge of the work, is supplemented by -anaxially inclined peripherally serrated wheel 71, which holds the work, without stretching Or buckling effect, against the feed dog durin%the advancing movement of the latter. oth

the presser foot and wheel, are.carried at' the end of the usual presser bar 73, and are normally forced toward the needleplate, by a spring as 74. A lifter lever 75, for raising the presser. bar to permit of work being introduced under; the wheel and presser foot,. is.- ,.pivotedv at ,76, to the head cap 77. One arm 78, of said. lifter is adaptcd to engage a pin T injecting from the 1n'esser bar through slot 80, in thehcad cap 77, while another arm 82., is suitably extended to receive a cord; or chain (not shown) by which the lift may be operated, in a direction to lift ti er bar, as by :toot power. lilorement o aal lever in the opposite direction, imparted spring 8:2, secured at its ends to ears and S-l, extending respm-tively ironi lever 13, and head cap 7?. Normally this sprirfgmaintains the lever in the Qtion in which it shown in 5. thus held, it permits freedom lo'r that movement of the presscr bar which elllected by the feed dog. in order to confine tin: nu zement oi lever T5, to limits within which it is desirably effective, it is provided with 1 pin 86, which projects into a slot 87. in the head In Figs. 1 and 2, l have illustrated for trin'nning the work, nzechani a commonly employed in connection with the type or machine shown. Such mechanism, which operated in a well know-n manner, in cludes the lower cutter 5J0 upper cutter 91, which cutters operate LC- trim the w .rk adjacent to one oi the needle plate, slightly in advance of needle. cutters are adjustable in the usual manner, so that the line of trimming, or distance of the cutters from the line of needle penetrw tion, may be varied. Should it be desirable to vary the line o -ieedl tration, with respect. to the cent work, the stop screw )3, may be adjusted, said screw being threaded into the ln'acl-Letand adopted at its point, to hear an: 1e needle plate support, to thereby sinilinward swing of the work.

Control over the positioni r or the work plate, is facilitated by introducing a spring backed plunger as beneath the work plate carrier. The plunger is forced against said carrier, with suiiicientpressure to pre- Xent objectionable freedom of movement thereof together with the work plate, about the pivot 34. l urt-hermore the plunger, acting as a detent, to enter slight depressions, as 96, in the under surface of the carrier, serves to prevent accidental dispiacementrot the latter and the work plate carried thereby, from adjusted positions, or in other words, from the position occupied when work is placed upon the work: plate, or that occupied when the stitching is being performed.

Referring again. to the needle plate, attention is directed to the inclined lip 97, depending therefrom, the purpose of which is to deflect upwardly on needle plate, that portion of the work which is unsupported by the work plate and the turntable. This deflecting a when ie ork is being swung The 'n'iethod of n mechanism is as follows :-.Assuming the work plate and clamp disk to have been swung to the positions in which they are shown in Fig. l, the operator places the work upon the work plate, in approximate ronceutricity with the turntable, the locating member having been previously adjusted to unmistakably define the proper position for the particular diameter of work to be stitched. The clamp disk is next moved by hand. pressure, applied at the button into clamping relation to hold the work firmly upon the turntable. The presser wheel and toot being next raised by foot power, the work plate and associated parts are swung toward the needle plate. It the edge of the work, where it is unsupported by the work plate and turntable, happens to'sag, it will, on approaching the needle plate, be engaged by the inclined lip 97, and finally deflected thereby, inpwardly on to the said needle plate. the regulating screw 93, engages the needle plate support, the work plate will have passed the work under the presser wheel and foot. to a position where the extreme edge thereof, will extend between the trimming cutters an amount equal to that which is to be trimmed from the edge of the pad. the work plate in proximity to the stitching mechanism, rotation of the work, tends to facilitate the passage of its edge under the prcsser wheel and foot. Rotation of the work. for this purpose, may be readily effected, already implied, by pressing obliquely against the roughened upper surface of the clamp disk with a finger of the same hand which controls both the adjustlag of said clamp, and positioning offthe work plate, thus promoting convenience.

Having completed the above noted operations for 1'n'operly locating the work, the presser wheel and foot, may be lowered, an the machine set in motion to perform feeding, trimming and stitchin When stitches have been applied throughout the desired eX- tentof the periphery of the work, the. latter may be guided away from the feeding, trimming and stitching mechanism, after swinging the work plate slightly to the left (as seen in Fig.

Having thus described my'invention, what ll claim is,

1. In a sewing machine, the combination with stitch forming mechanism, of a needle plate, a work plate mounted for movement in a plane substantially coincident with that of the needle plate, a turntable carried by the work plate, an arm pivoted to the work plate, and a rotatable disk carried by the arm for bodily movement toward and from the Y turntable.

in a sewin machine, the combination with stitch forming mechanism, of a needle by the work plate, each of a work engaging surface substantially coincident with a single 'ing means for the Work plate adapted to permit of movement in said plane of the Work plate and turntable.

3. In a sewing machine, the combination with stitch forming mechanism, of a needle plate, a Work plate having an opening in its work engaging surface, a turntable in said opening, supported by theworkplate below the workengaging surface thereof, an arm carried by the work plate, clamping means associated with the arm above the turntable and a support for the work plate adapted to permit of its movement toward andi rom the needle plate.

4. Ina sewing machine the combination with stitch forming mechanism of a movable work support, a turntable carried by the work support, a disk cotiperative with the I turntable to clamp with stitch forming mechanism,

the work, an adjustable arm for carrying the disk, and means for connecting said'arm and disk for universal movement therebetween. A

5-. In a sewing machine, the combination of a needle plate, a movable Work support, and pivotal .work' clamping means associated with the said devices hav- 7 work support, each work engaging surface substantially in a single plane, and the needle plate having an inclined lip leading to its work supporting surface, whereby an. of material held by the clamping means will be deflected to said needle plate supporting surface as the work support is moved toward the stitch forming mechanism. (3. In a sewing machine, the combination with stitch forming mechanism and work feeding :rnechanisin including a feed dog and prcsser foot, of a work support movable bodily toward and. iromlhe stitch forming and work-feedingmechanism inthe plane of the work, said work support embodying a turntable free to rotate. as the work is fed and a freely rotatable clamp movable axially toward and from the turntable and connected with the turntable for movement toward and from the feedingmechanism by supporting connections located at one side of the axis of the turntable and clamp and beyond the periphery of the work.

JOSEPH M. MERROW.

Witnesses:

113V. SPELLMAN,

F. E. Aunnnson.

of said devices having a

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