US1848804A - Sewing - Google Patents

Description

March 8, 1932.

L. M. SCHOONMAK ER SEWING MACHINE Filed Aug. 20, 1926 4 Sheets-Sheet l INVENTOR 7m- A ORNEY-S Mgrch 8, 1932. M. SCHOONMAKER SEWING MACHINE 1926 4 Sheets-Sheet 2 Filed Aug. 20

March 8, 1932. M. SCHOONMAKER SEWING MACHINE 1926 4 Sheets-Sheet Filed Aug. 20

3 R OM T V March 8, 1932. M. SCHOONMAKER SEWING MACHINE 1926 '4 Sheets-Sheet 4 Filed Aug. 20

INVENTOR (1,752. RNEYS 51321 JAWQAV.

II/IIIIIIIIIIIII Patented Mar: 8, 1932 LEON in. scrroonmmn, or ronEsr mus, NEW YORK SEWING MACHINE I 7 Application filed August 20, 1926, Serial No. 130,395.

'.My invention relates to sewing machines, and my primary object is to provide an electric sewing machine so small and compact that it'can be carried in a travelers luggage and used in other situations where the present day portable machines are too large, heavy and expensive; Various features of my invention may be employed however in larger. sewing machines and certain features even in machines not power-driven.

The accompanying drawings illustrate my invention in both lock-stitch and chainstitch machines. Fig. 1 is an elevation partly in section of a lock-stitch machine embodying my invention. Fig. 2 is an elevation of the left hand end of the same machine, also partly in section. Fig. 3 is a plan view, a part of the cloth plate bein omitted. Fig. 4; is a section adjacentthe right-hand 1 end and Fig. 5 is a mid-section. F 1g. 6 is a plan view of the left end of the baseof the machine with the cloth plate removed. Figs. 7, 8; 9 and 10 are details of the feed mechanism. Fig. 11 illustrates how the machine may be packed in a small box or carrying case. Fig. 12 is an elevation partly in .section of a chain-stitch machine embodying my invention. Fig. 13 is a plan view of the machine of Fig. 12. Fig. 14 is an elevation of the left end of the same machine, the cover plate of the head and a part of the cloth plate and presser foot bar being broken away. Fig. 15 is a horizontal section near the center line of the motor. And Figs. 16,

17, '18, 19 and 20 illustrate details of "and parts-adjacent the feed mechanism of the machine of Fig. 12.

The electric motor and the parts forming the sewing machine proper are built together as a single unit, in'contradistinction to the more usual practice which, in effect, is constructing substantially a complete sewing machine and applying theretoa motor constituting more or less an independent unit.

As illustrated, the motor itself forms the base and base casing of the sewing machine,

the motor mechanism per se being located,

immediately below the ,level of the cloth 7 plate, this not only promoting compactness and light weight but also producing a low center of gravity, which is especially important in miniature machines. This matter isalso the subject of a prior copending application of mine, Serial No. 737,484, filed September 13, 1924; the present drawings however illustrate an improvement on the machine described in my prior application, among other things-to the ends of lowering the cloth plate and reducing the weight and number of parts.

In portable machines, the bottom of the sewing machine is made flat, whereby it can be set on a table for use. To reduce the height of the cloth plate above this bottom (and elsewhere where compactness is a desideratum), the motor is preferably ofa kind in which the field windings are concentrated or located entirely at one or both sides of the armature rather than above or below the armature, and further, of a kind in which the pole pieces, rather than field core yokes, arelocated above and below the armature. Thus in the motor illustrated it will be observed (Fig. 5) that the pole pieces are above and below the armature while the yokes, two in number, are located at the two sides and the field winding is divided between the two vertical legs of the yokes. This field core outline and-armature relation is sometimes referred to as the Manchester type of dynamo. By dividing 39 the field winding into two coils 9 located at both sides of the armature rather than con 1 centrating it at one side only, the vertical dimension of each horizontal leg of the yokes is but one-half of what it would be werethe 1 field winding concentrated entirely at: one side of the armature (same number of flux lines assumed). Furthermore, by such a construction the vertical dimension of the core k iron directly above and below the armature shaft may be almost nothing, sincethere is very little or almost no flux in the horizontal direction at this point; I contemplate that the core iron might even be opened at this point. I prefer a motor embodying these features of construction since thereby the height of the motor may be brought down to but little if any more than the diameter of the armature. Furthermore, such a motor is preferable in machines where, like those ilwe lustrated, the motor shaft lies substantially underneaththe overhanging arm of the sewing'mechanism since this construction places the center of gravity of the motor in or near the vertical central plane of the machine; this is especially important I believe in very small machines.

The group of laminations constituting field core 10 are set into a slot in the bottom plate 11 of the casing of the motor, while the top and two long sides ofthe motor casing are composed of two flanged pieces 13 and an inset or filler piece 14, the horizontal flanges of the pieces 13 reaching inwardly to an upward projection 15 from the core structure so that the upper part of the core is also confined within a recess in the casing. The inset or filler 14 completes the top closure beyond the left end of the field core structure as shown in Fig. 6; the space to the right of the field core is covered by the head upright or standard 16. Right and left end members 17 and 18 are secured to and secure the bottom and side platesin a suitable manner. Various of these top, bottom, side and end .members may be united into integral pieces as constructional convenience may dictate; thus in Figs. 1 to 6 various top and side pieces are joined and in Figs. 12, 14 and 15 two sides, the top and one end are joined into a single piece. pad of felt, rubber, or other suitable material attached to the bottom of the machine to prevent marring, reduce noise, etc. The motor shaft 23 is carried in bearings 24 and 25 in the end plates 17 and 18, respectively; these hearings may be of any suitable kind, antifriction or otherwise. The motor armature 26 and commutator 27 are mounted on the shaft 23 of course; the brushes 28, bearing on the commutator, are carried in bosses 29 projecting from the side members 13. The internal electrical connections have been omitted from the drawings for clarity and in order to emphasize the illustration of more essential parts, but will be understood; the

outlet lead 30 from the machine can come out from the back of the upright or standard 16 conveniently, as shown in Figs. 3, 4, 13 and 14.

The head upright or standard 16 rises directly from the top of the motor as will be understood from the foregoing, and may be integral with or bolted to suitable parts of the motor, such as the side plates 13 as before indicated; the former arrangement is employed in the machine of Fig. 12 and the latter in the machine of Fig. 1. The overhanging arm 34 terminates in a head 35", as usual, and preferably the needle bar is shaft-driven by means of a belt 35 reaching between the pulley 36 (or 125) on the upper shaft 37 and a pulley 38 (or 124) on the mo-.

tor or lower machine shaft 23; the belts illustrated comprise many lines of a light, strong The member 12 is a sheet or,

twine laid parallel and held together as a unit by wire clips in a known manner. I i

prefer a belt drive from the. motor shaft to the top of the standard or upright since this readily provides useful space within the standard, as illustrated by the preferred location of the motor controlling rheostat 39 therein.

This rheostat comprises. anumber of insulating members (four are illustrated) wound with suitable resistance wire, through which and a metal rheostat arm 40 the current is led in such a manner that movement of the rheostat arm 40 over the upper ends of the coils.

to limit the throw of the arcuate member 41.

are formed on the end member 17 at opposite sides to the bearing 24. 7

The needle bars are shown at 46 and carry ordinary needles 47 in a well known manner. Preferably the needle bars r46 are square in cross section to prevent turning and they pass through both the upper wall 48 and lower wall 49 of the heads so as to have adequate bearing. According to my invention, the needle bar is reciprocated by the upper shaft 37 through the agency of a crank pin 50 fitted at or provided with an anti-friction roller I on its outer end to travel'in a rectangular slot in the cross member 51 which is fastened to the needle bar 46- at right angles to the latter. The drank pin 50 may be located near the outer margin of a complete disk 52 (Fig. i

2), or the disk may be cut away to a crank or arranged as a counterweight as indicated in Fig. 14 for example. As the shaft 37 rotates it is apparent that the crank pin 50 will cause the needle bar to make one complete up and down reciprocation with each rotation ofthe shaft. The presser-foot bar 65 may be placed to the left of the cross member 51 see Figs. 1, 2 and 14). I prefer this type of mechanism for operating the needle bar in preference to the Pittman type, etc. now commonly used, since the illustrated type permits the head being made smaller.

Referring now more particularly to the machine of Figs. 1 to 10: It will be observed that the needle bar 46 is located between the shaft 37 and the operator; the purpose of .disk 52 so as to be able to oscillate and is pierced to receive with'a slidin fit the arm 54 which is attached to the ta e-up lever. Each rotation of the shaft 37 therefore oscillates the arm 54 and take-up 53 throu h one complete cycle. With both the needle ar 46 and the oscillating end of the take-up lever 53 between the axial line of shaft 37 and the operator, and the shaft37 rotating in the customary direction (clockwise inFig. 2), the take-up begins to move down as the needle-bar approaches its mid-position descent, moving slowly at first but with increasing speed as the needle bar descends farther and reaching its maximum speed as the needle-bar reaches its lowest point. Because of the relation of the various parts, it will be observed that the take-up continues to'fall for a time after the needle starts upwardly. Thetake-up fully releases the tread therefore at the time the loop is being drawn. Shortly after the needle bar passes its mid-position in its ascent however, the take-up begins to rise, and (because the pin 50 is now nearer the hinge-point 55 than before) rises rapidly. With the parts related as illustrated the entire upward movement of the take-up is accomplished in about one-fourth of a rotation of the'shaft 37. The take-up puts the tension on the thread therefore to complete the stitch promptly on the releasing of the loop. In general, the relation between the downward speed of the take-up and its upward speed is a function of the vertical distance between the hinge-point and the axis of shaft 37, and the timing of the needle-bar with respect to the movement of the take-up is a function of the horizontal relation between the axis of the shaft 37 and the axis of'the needle-bar.

The spool-holder with spool is shown at 58, and in threading up the machine the thread is passed first to the right to a hook 5.9, thence to the left toa hook 60, downward to the tension 61 and through the eye of the slack thread controller 62, through the eye of the take-up 53, and thence to the hook on the lower end of the needle bar 46 and the eye of the needle. The tension device 61 is of a well known type in which the thread passes between circular plates pressed together by a spring under ad vjustable tension; the slack thread controller 62 is likewise a well known form made of spring wire. One end of a band 63 of spring metal, passing around the base of the tension device, provides a stop for the downward movement of the controller 62 as will be understood from Figs. 1 and 2; the spring tension of the band63 holds it in position on the standard While the position of the stop can be adjusted by sliding the band 63 around the standard to an appropriate place. The presser foot 64 is mounted as usual on a presser foot bar 65 which, however, is also square preferably to prevent turningin a support. Preferably the bar 65 itself passes" through only the lower wall 49 of the head I is applied .releasably held therein by the while its upper. end is guided audits tension 66 is rovi ed with a knurled head 67and threa ed at its lower end, and is-held in the upper head 48' by a circumferential slot in the bolt 66 and a pin or the like iii-the head which locks the bolt inthe head wall but permits it to be turned. Thethreaded end of this bolt enters :corres' onding threads in the square'or feathere plu 68, over which. the presser foot bar 65 sli eseasily. Between the lower end of the plug and the presser foot bar 65 is located a s ring 69. The plug therefore acts as a guide, and the tension of the foot is adjustable by turning the bolt 66. For machines where compactness is essential, I prefer this mounting for the presser foot 64, rather than the mounting in which the presser foot adjusting screw rises as the pressure of the presser foot is reduced, since relieving the pressure of the foot on thecloth does not increase the over-all dimensions of the machine. The presser foot is lifted when desired bymeans of the usual cam lever 7 O engaging underneath a projection from the presser foot bar 65 as appears in Figs. 1 and 2. c

As mentioned before, the machine of Figs. 1 to 10 is a lock stitch machine. The bobbin 7 6 is carried within a rotary looper 7 7, being ivoted lever 78. The looper is of the type which operates with a constant speed of rotation, and the looper end bobbin, illustrated need not be described further; they will be recognized to be of aw'ell known type in which the looper makes two rotations for each reciprocation of the needle; and at each reciprocation draws a loop of the needle thread around the bobbin. I mount the looper directly on the motor-shaft 23 and to accommodate the two rotations of the looper for each reciprocation of the needle 47, I make the pulley 38 half the size of the upper pulley 36 so that the upper shaft 37 is driven at half the speed of the lower or motor shaft 23.

The feed is of the four-motion type and is operated by the motor shaft 23; speed reduc .bolt166 and plug 68. The bolt mg gearing is interposed in the machine of the block 86 which thus tends to hold the member 84 to the-face of theplate 18. At'

the opposite ehd of the frame 84 are apai-r of vertical wall members 87 and a pair of horizontal wall members 88 forming a compound yoke for receiving respectively the cams or eccentrics 90 and 91 which are ang'ularly displaced 90 from each other. The eccentric 91 which produces the up and down motion,

I is fixed on the, hollow stub shaft .92; the ec- 5 centric 90 however, which determines the length of the stitch, is slotted (see Fi and 9) in such a direction that its eccentrlcity may be increased or diminished by sliding the eccentric transversely of the shaft. To control the position of the eccentric 90 on the shaft 92, a sliding sleeve 93 is inserted in the hollow shaft and externally provided with two pins 94 which project through axially-extending slots 95 in the shaft walls and into inclined slots 96 in the cam 90 (see broken lines in Fig. 7 internal screw-threads in the sleeve 93 and external threads on the bolt 97, turning loosely in the left end of the stubshaft -92but groovedand pinned in the shaft to prevent longitudinal movement, permit the sleeve 93 to be moved to the'right or to the left and thereby the eccentricity of the eccentric 90 changed asdesired and accordingly the length of the stitch changed as desired.

25 A knurled head 98 on the pin 97 permits the adjustment to be made by hand. The stub shaft 92 is driven by gears 99 and 100, the latter being half the size of the former and mounted on the motor shaft 23 while the former is mounted on the stub shaft. It will be apparent-- from the construction that the I eccentric 91 will raise and depress the frame 84 and thereby the feed dogs 82 on the frame, and the eccentric 90 will reciprocate the frame and dogs back and forth, once, for each two rotations of the motor shaft and hence Byaproper angular relation of the two eccentrics to each other the dogs will be drawn away from the operator while raised, and by a proper angular relation of the eccentrics to the shaft 23 the cloth will be advanced while the needle is raised. One end of the stub shaft 92 has a bearing in the end wall 18; a bracket 101 extended from the top of'this end wall supports the other end of the stub shaft and also provides a hook 102 to maintain a part of the bobbin-looper combination 7677 stationary aswill be understood.

Especially in very small machines it is desirable that the cloth plate 106 be larger than I the base of the machine. In order to reduce i the over-all dimensions of the machine for packing purposes therefore, I make the cloth ,plate 106 detachable, along with or without the throat plate/107 in the region of the feed dogs 82 as desired. Underneath the plate on one side of the machine, is provided a hook 108 (Figs. 2 and 5) arranged to enter a recess in the adjacent side plate 13; on the opposite side of the machine a releasable latch, hook or eccentric 109 is provided with a finger piece 110 whereby this hook can be engaged in a recess in the adjacent side plate 13 and the cloth plate, thereby located in position for once for each reciprocation of the needle.

foregoing nee-secs use. By releasing the hook.109 the plate 106 can be lifted up and removed, the presser foot first being raised to permit'the cloth late being passed underneath. Fig. ll-ilustrates how a machine with a reasonably large detachable cloth plate can be packed for storage or transportation. The case 113, it will be observed, may be madejust deep enough to take the machine and only a little wider than the base casing of the machine; a cloth plate of corresponding length and width can then he slipped into the case vertically beside the machine. The cover 114 of the case may be equipped to carry extra bobbin 7 6, bobbin winder 115 tools 110, etc.

I have applied a lamp to light the work, preferably on the side of the machine nearer the operator. As indicated, the lamp socket 117 is attached to the overhanging arm34; a pull cha n for a switch, if desired, is indicated at 118. A lamp 119 is shown screwed into the socket and an overhanging shade and reflector is shown at 120. I prefer to locate the lamp on the side of the machine nearer the operator in order to fully light the cloth .at the point where it passes underneath the presser foot and needle. In machines having a longer overhanging arm, it is possible to find a satisfactory position for the lamp on the side of the arm remote from the operator; with small machines however it is more convenient to locate the lamp on the near side of the arm.

For winding bobbinsI provide a bobbin winder such as shown at 115, one end of which is adapted to receive the bobbin while the other end is split (Fig. 1) for entry and frictional engagement in a recess in the end of one of the shafts, such as the right end of the lower shaft 23. It will be understood that the bobbin winder 115 is intended to be inserted when required for use and removed again when the machine is to be packed in its case. Such a winder does not increase the overall packing dimensions of the machine or materially increase the weight. Much of the description applies to the chain stitch machine of Figs. 12 to 20 as will have been understood. Being a chain stitch machine however, no bobbin is used and the looper 123 is of a correspondingly different type in the machine of Figs. 12 to 20 as will be understood. As before however, the looper is applied directly .to the end of the motor shaft 23 but inasmuch as in this type of machine the needle reciprocates with each rotathe size of the other as in the lock stitch machine, shown in Fig. 1. In the machine of Fig. 12 also, the take-up is the needle bar 46 itself, the thread passing from the tension dev ce through an eye in the upper end of the needle bar and thence downwardly. As the simple manner.'- The tension device ccnsists as usual of two plates 127 and 128, the first of which is pressed toward the other by a spring 129 held by thumb-nut on the supporting post 130 which is threaded into the side of the overhanging -arm34.sj The inner end of the post 130 is hollow and contains a sliding pin 132 which reaches to a cam surface 133 on the shaft 37; this surface may be provided by cutting away a part of the shaft as indicated. As thehigh part of the cam passes the pin, the pin is pushed farther into the" post 130 and a connection (reaching through the wall of the post) between the pin and the plate 127, pushes the plate 127 slightly away from the plate 128; as the high partof the cam leaves the pin'the spring 129 restores the parts to the initial positions and resumes the tension.

The carrier for the thread spool consists of a bracket 135 fastened to the machine head at the back of the machine, from which depends a rod 136. The spool of thread 137 is pushed up onto this rod from underneath and the collar 138 is slipped onto the rod underneath the spool; the collar is then fastened to the rod by the thumb-nut 139.-

Inasmuch as the needle in this machine makes a complete reciprocation during each, rotation of the looper shaft 23, no speed reducing gearing is required to permit the feed to be driven from the shaft 23: The feed dogs 142 are bolted to an irregular frame 143 (Fig. 18) differing in shape but resembling in func tion and operation the feed frame of Fig. 10. As in the machine of Fig. 1, the feed frame has guide-ways 144 by which it is carried on a' block 145 bolted to oscillate on the motor end wall 18, and a pair of vertical walls 146 and a pair of horizontal'walls 147 against which operate two eccentrics 148 and 149 respectively. The eccentrics are mounted on the motor shaft 23. The eccentric 149, which gives the up and down motion, is fixed directly to the shaft'23 as indicated in Fig. 15, just to the right of looper 123. To the right of this eccentric 149 is located the eccentric 148 which, as in the machine of Fig. 1, is provided with an elongated slot (through which the shaft 23 passes) and inclined slots 150 like the slots 96. Therontrol pins 151 pass through axial slots 152 pierced in the shaft 23, and the latter is made hollow to receive a sliding rod or sleeves 154 to carry the pins 151. Resembling the sleeve 93, this rod 154 is internally threaded and adjusted axially of the shaft by means of the adjustment screw 155 which is pinned but rotatable within the shaft 23; as illustrated this screw may be kerfed at its outer end to receive a screwdriver for adjusting the feed. The feed dogs 142 are attached at 141 to the frame 143.

It will be understood that while I have illustrated and desci'lbed the best forms of my invention of which I am now aware, my invention is not limited to the details illustrated and described except as appears in the claims.- Furthermore, I am aware that in certain dynamo-electric machines the armature constitutes the stationary structure'and the field or exciting windings rotate; it will be understood therefore that wherever in the claims I mentlon the looper as mounted on or driven by the armature or armature shaft, or the like, I include thereunder mounting the looper on or driving it by the field o'rfield shaft, and the like, if the field windingsconstitute the rotating structure, unless the contrary appears.

I claim:

1. A sewing machine comprising an electric motor, connections therefrom for actuating the needle, and a rotary looper mounted on the armature shaft of the electric motor.

2. A multiple thread swing machine comprising an electric motor, connections therefrom for actuating the needle, a rotary looper mounted on the armature shaft, a bobbin adjacent the looper, a cloth feeder, a stub shaft adjacent the looper to actuate said feeder, and means through which the armature shaft turns said stub shaft at reduced speed to actuate the feeder.

3. In a sewing machine having an upright standard rising from the machine base and carrying an overhanging arm supporting the needle mechanism, and mechanism at the machine base cooperating with the needle to complete the stitch, an electric motor at the machine base, extending underneath and immediately below the path for the material to be sewn, to actuate the sewing mechanism, said motor having its armature shaft horizontal and its field winding substantially concentrated horizontally of the armature.

4. In a sewing machine having an upright standard rising from the machine base and carrying an overhanging arm supporting the needle mechanism, and mechanism at the machine base cooperating with the needle to complete the stitch, an electric: motor at the machine base immediately below the path of the material to be sewn, to actuate the sewing mechanism, said motor having its armature shaft horizontal and its field winding substantially concentrated into two coils, one at each side of the armature.

5. In a sewing machine having an upright standard rising from the machine base and carrying an overhanging arm supporting field windin disposed horizontally of the. armature an its pole pieces above and below the armature.

6. The machine of claim 5 characterized by the fact that a rotary looper is mounted on thearmature' shaft. A 7. The'machine of claim 5 characterized by the fact that the feed mechanism is driven by thearmature shaft. v

8. The machine of claim 5 characterized by the fact-that a rotary looper is mounted on the armature shaft and that the armature shaft, at a point adjacent the looper, drives cam mechanism operating the feed.

9. The sewin machine of-clalm 5 characterized by the act that a looper and bobbin are mounted on the armature shaft, and that a lay shaft, driven by the armature shaft through speed reducing gearin carries two cams operating a four-motion feed dog.

10. The machine of claim 5 characterized by the fact that a looper is mounted on the armature shaft, and that two cams, one operating a feed dog vertically and the other operating the dog horizontally and being adjustable to vary the horizontal movement of the feed dog, are driven by the armature shaft. 7

11. In a sewing machine having needle actuating mechanism, a shaft at the machine base to actuate the looper cooperating with the needle, a parallel shaft, a gear whel on the parallel shaft meshing with a gear wheel on the other shaft through which the parallel shaft is driven, a feeding structure mounted to slide and oscillate, an eccentric cam fixed to the parallel shaft to move said feeding structure vertically, a second eccentric cam mounted on the parallel shaft to move said structure horizontally, said second eccentric cam having a slot through which the parallel shaft passes, and a member within the'parallel shaft to adjust said second cam transyersely of the parallel shaft to adjust the eed.

12. In a, sewing machine, a base therefor providing a substantially vertical stationary surface, a feeding mechanism comprising a structure, one side of which bears against said surface and having a feed dog at its opposite side, a rotating shaft, an eccentric cam fixed to said shaft to engage and move said structure vertically, a second eccentric cam also mounted on and driven by said shaft to engage and move said structure horizontally, said second cam having a slot through which the shaft passes, and means for moving said second cam transversely of the shaft to adjust the feed.

13. The combination of claim 12 characterized by the fact that the means for moving said second eccentric cam on the shaft comprises a member movable within and lengthwise of the second shaft, a pin on said member passing through a slot in the wall of the shaft and engaging an angular slot in the second cam so of said second cam.

' 14; In a.sewing machine,'a feeding mechanism comprising a structure having means to engage the work, a rotating shaft, an eccentric cam fixed on said shaft to move said structure vertically, a second eccentric cam also mounted on and driven by said shaft to move said structure horizontally, said second cam having a slot through which said shaft passes, a member within and movable lengthwise of the shaft, a pin on said member passing through'a slot in the wall of said shaft and into an angular slot in the second cam so that moving said member lengthwise of the shaft changes the throw of said second cam, and a rotatable member fixed within the shaft against movement lengthwise of the shaft and threaded to the member carrying the pin so that turning said rotatable member moves the pin-carrying member lengthwise.

15. In a sewing machine, a needle bar provided with a slot to receive a crank, a shaft provided with a crank to enter the needle bar slot to actuate the needle bar, and a thread take-up, the crank having an oscillatable connection with the shaft and being pierced to receive the thread take-upto actuate the latter.

16. In a sewing machine, a needle bar, a shaft substantially at right angles thereto, the needle bar being provided with a slot substantially at right angles to both the needle bar and the shaft and the shaft having a crank pin engaging in the slot through which the shaft reciprocates the needle bar, and a thread take-up also connected to said crank pin for actuation thereby, the thread take-up member engaging the crank pin being hinged substantially above said shaft and the needle bar being located at one side of the shaft axis.

17 In a sewing machine, a needle bar, a shaft substantially at right angles thereto, the needle bar being locatedat one side of the shaft axis and being provided with a slot and the shaft having a crank pin, rotatable with respect to the shaft, engaging in the slot for actuating the needle bar, and a thread take-up hinged substantially above the shaft and having a member engaging and slidable with respect to the crank pin.

18. A sewing machine comprising an upright standard and overhanging arm with the needle mechanism, an electric motor at the base of the. machine, a connection through which the armature shaft of the electric motor drives the needle mechanism, a second shaft at the base of the machine, substantially parallel to the armature shaft and connectedto the armature shaft to be driven thereby, a feed device for the Work, means I that moving said member lengthwise of said shaft changes-thethrow for operating said feed device, said means being mounted on one of said shafts, and a looper mechanism driven by the other of said shafts. V y

19. In a sewing machine, a motor field, a rotating armature, a looper on the armature shaft, another rotating shaft, a needle ac tuated thereby, and means connecting said shafts through which the second mentioned shaft is operated at a speed different from and proper with respect to the speed of the armature shaft 7 20. .In a sewing machine, a motor field and a rotating armature at the base of the machine, a rotary looper mounted on the armature shaft, a rotating shaft at the overhanging arm of the machine, a needle bar actuated thereby, and means connecting said shafts through which the needle bar actuating shaft ii operated at one-half the speed of the looper s a t.

21. In a lock-stitch sewing machine, a shaft at the base of the machine, a motor field structure anda rotating armature on the shaft at the base of the machine, a rotary looper and bobbin mounted on said shaft,

' the looper rotating with said shaft, a rotating shaft at the overhanging arm of the machine, a needle bar actuated thereby, means connecting said shafts through which the needle bar actuating shaft is actuated at one-half the speed of the looper shaft.

22. In a sewing machine, a rotating shaft at the base of the machine, a motor armature on said shaft, a rotary looper mounted on said shaft, a rotating shaft at the overhanging arm of the machine for actuatin the needle bar, means connecting the said s afts through which the needle bar actuating shaft is operated at one-half the speed of the looper shaft, and a second shaft at the base of the machine, for operating the feed, so connected to the first mentioned shaft that the first mentioned shaft is driven at twice the speed of the feed operating shaft.

23.- In a sewing machine, a motor field structure, a rotating armature, a looper on the armature shaft, another rotating'shaft,

a needle actuated thereby, and means connecting said shafts through which the second a shaft.

' nism at the base of the machine, a structure at the base of the machine movable vertically mentioned shaft is driven from the armature shafts being driven, and means connecting the two shafts through which said driven shaft drives the other.

25. A'portable sewing machine adapted to be rested on a table for use, comprising a low substantially-flat-bottomed base, the cloth plate of the machine being immediatel at the top of said base, an upright stan ard rising from said base and carrying an overhanging arm supporting the needle mechanism, mechanism at said basecooperating with the needle to complete the stitch, and an electric motor within said base to actuate the sewing mechanism and comprising a rotating armature, pole pieces above and below the armature, field core yokes at the two sides of the armature, and the field winding sur-' rounding said yokes.

26. In a sewin machine having an upright standard rising from a base and carrying an overhanging arm supporting the needle mechanism, a rotating shaft at the base substantially parallel to said overhanging arm, a feeding mechanism comprising a unitary structure and placed substantially transversely of said shaft, movable both vertically and horizontally, and having means to engage and feed the work, an aperture being provided in said structure into which said shaft extends, a cam on said shaft atsaid a erture to engage and raise said structure, an a cam on said shaft at said aperture to engage and ositively move the structure horizontally in both directions, said latter cam being adjustable on its shaft to change its eccentricity to change the feeding action of said feeding mechanism.

27. In a sewing machine, a yoke carryin a feed dog to engage the cloth and provifed with two pairs of faces placed substantially at right angles to each other, a rotating shaft,

a feed cam fixed to said shaft, and a second In testimony whereof, I have signed this specification.

LEON M. SCHOONMAKER.

and horizontally and carrying a feed dog,

two parallel rotating s afts at the base of the machine, one driving hejlooper mechanism and the other carrying two'cams engaging said structure, one of said cams reciprocating the structure vertically and the other reciprocating the structure horizontally, one of said

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