US1047728A - Sewing-machine. - Google Patents

Description

F. BAKER & L. JACOBS.

- SEWING MACHINE.

APPLIOATION I'ILBD In. 29, 1909.

- Patented Dec. 17,1912.

5 SHBETSBK EET 1.

F. BAKER & L. JACOBS.

SEWING MACHINE.

APPLICATION FILED JAN. 29, 1909.

Patented Dec. 17, 1912.

7 a m E F. BAKER 5: L. JAOOBS.

SEWING MACHINE.

APPLICATION IILBD J11. 29, 19 09.

Patented Dec. 17,1912.

6 SHEETS-SHEET 3.

F. BAKER & L. JACOBS.

SEWING MACHINE.

APPLICATION IlLED JAN.29,1909

Patented Dec. '17, 1912? 5 SHEETS-SHEET 5.

' raannmox BAKER, or IBLACKHEATH,

- .L-*UN ITEI) STATES PATENToFFIbE.

AND LESSER JACOBS, OF LONDON,

ENGLAND,

ASSIGNORS TO BAKER SEWING MACHINES TRUST LIMITED, OF LONDON. ENGLAND.

SEWING-MACHIN E.

Specification of Letters Patent.

Patented 1390.17,.1912.

Application filed January 29, 1909. Serial No. 474,977.

To atl whom it may concern:

Be it known that we, FREDERICK BAKER and Lnssnn JAcons, both subjects of. the King of Great Britain, residing, respectively, at 66 Lee road, Blackheat-h, 1n the county of Kent, England, and 17 Hanover Square, in the county of London, England, have invented certain new and useful 'Improvements in and Relating to Sewmg-Machines, of which the following is a specification, 1

This invention relates to sewing machines and more particularly to the type of machine as set forth in the specification of our prior application Serial N 0. 434702.

The chief object of our present inventlon is to provide a machine having constructional and functional characteristics speeially adapted for use on a double thread stitch. By the use of a single rotary or osc1lla-.

machine for producing the well known locktory loop-forming hook a single stitch during each rotation or oscillation of sald hook will be produced; by the use of two or more hooks on a rotating member, two or more stitches may be formed and completed at each rotation, with the result that the speed of sewing can be-made approximately two or more times that capable of being attained under equivalent conditions by the ordinary lock stitch machines heretofore in use.

The possibility of producing two or more stitches during one revolution of the hookcarrymg member is due fundamentally to.

the fact that each loop of thread drawn from the needle is released or thrown off from tlie'hook before the latter, after engaging the thread, has moved through an arc of one hundred eighty degrees; in fact,

each loop is conveniently released or thrown 0E after the hook has turned through anarc of less than ninety degrees. 2

According to our present invention instead of employing-the stationary tension device described-in the specification above referred to, we-employa device so constructed that it'ls capable of carrying a spool of thread which can be quickly inserted and removed from said device as desired, the other mechanism being adapted to act'in conjunction with this spool carrying device in such a manner that loops are drawn of! from the needle-thread as in thelprevious case and thrown hround .alidoyelf the spoolv carrying device and spool'thread, the latter being drawn from said spool, in the ordiof the'mechanism shown in Fig. 1 with the needle plate omitted. Figs. 3 and views showing the disk in two difi'erent positions. Fig. 5 spool carrying device. Figs. 6, 7 and 8 are diagrams showing two pieces of material in the course of being sewn together according to'our invention. Fig. 9 is .a face view of the disk and cooperatlng parts adapted for producing two stitches per revolution of said disk. Figs. 10 and 11 are end views 4 are end 7 is an end elevation of the from the right and left hands respectively 80.

of Fig.0., Fig. 12 13. is anend view hook shown in Fig. 9 detached. Fig. 14 is a longitudinal vertical section of part of a machine showing one form of driving mechanism which may be used when working with is a face view, and Fig.

an oscillatory disk. Fig. 15 is an end sectional elevation taken on the line aa of Fig. 14. Fig. 16 is a longitudinal sectional elevation of a machine working with a rotary disk and producing two stitches per revolution of the same, and Figs. 16 and 16* are detail views of two cams on the diskshaft. Fig. 17' is an end sectional elevation of the machine shown in Fig. 16. Fig. 18 is a plan of the chief parts'of the mechanism beneath the bed plate, which is shown broken away. Fig. 18 is a section on the line bb of Fig. 18. Fig. l9 is a detail view of the back of the disk shown in Figs. 16, 17 and 18, and loop lifting means cooperating therewith as hereinafter described. Fig. 20 is similar to a portion of Fig. 9 but shows the hook in a different position. Fig. 21 is an elevation of thereverse shown in Fig.

A Aistlre needle, B the 'bed plate of the thianeedle thread,

of the modified form of side of a plate employed as; 9. Figs. 22am! 23 are a face,

the needle, B the bed plate of the be caused to oscillate and the hook (Z thereon for drawing a loop of thread from the needle A. may be fixed or capable of rocking, but

"in the case of a rotary disk, the hook or hooks would be movable. In the construction shown by way of example in Fig. 1 of the accompanying drawings, the disk D is adapted to oscillate through about ninety degrees and a fixed hook (I is shown, which is formed by cutting a hook-shaped recess in the periphery of the disk. Means for causing the oscillation of the disk shaft D 1 may comprise a crank arm D (Figs. 14 and 15) on the end of the disk shaft D and a connecting rod D connecting the said crank D with the cranked portion A of the top or needle operating shaft A", the latter being caused to rotate in any well known manner.

To make a plurality of stitches per revolution, the disk is made to rotate and is provided with a plurality of hooks, two being shown in the construction shown in Fig. 9.

-The needle is of course made to reciprocate accordingly. One arrangement of the driving mechanism for producing two stitches and A, and the two bevel gear wheels A and A which latter are in the ratio of 1 to 2, to the needle operating shaft N, which is thereby rotated twice to every single revolution of the shaft D and thus causes the needle bar A and needle A to descend twice to each revolution of the said disk and thus enable each of the two hooks on the disk D to draw off a loop of thread. The

shaft A carries the cam A, from which the needle bar is reciprocated by means of the connecting rod A, and from which the take up A is also actuated in synchronism with the needle by means of the pin A on said take upA engaging with the cam groove A- on the periphery of the said cam A. The feed mechanism for moving forward the material stitch by stitch must also be such as to synchronize with the needle movements. In Figs. 16, l? and 18 this mechanism is shown comprising the feed bar L, one end of which is forked to engage with the feed regulating bar L, and the other end of which is bent so as to present a surface upon which the spring L normally bears. The feed bar L rests upon the feed-bar lifting cam M on the shaft D, which cam is shown in detail in Fig. 16 and is so shaped that itraises the feed bar twice to each revolution of the shaft I). In Fig. 16" a cam M similar in action to the aforesaid cam M is shown; the cam M is a feed-bar advancing cam, which imparts to the bar L through the friction roller L asmall axial movement twice to each revolution of the shaft D The two cams M and H are related to one another as shown in Figs. 16 and 16', from which it will beseen that. the feed-bar advancing cam M operates at the moment when the feed-bar lifting cam is operated. The bar L is hinged to the arm L which is pivoted at L and bears upon a projection L on the feed regulating bar I}. The axial movements of the bar L are imparted through the pivoted arm L projection L, and feed regulating bar L to the feed bar L.

L is a set screw engaging with one end of the feed regulating bar L by moving the set screw L longitudinally the point of contact of the projection L on the pivoted arm Lf may be varied, and the extentof forward movement of the feed bar L, and hence the length of stitelninay be thereby regulated.

Ne will refer now more particularly to Figs. 1-8. I) is the spool and E the sta tionary spool carrier which takes the place of the tension device casing used in our prior construction of sewing machine; the said spool carrier is shaped so as to fit neatly against the disk D, which is grooved at D to enable a rib D on the spool carrier E to fit loosely but neatly therein.

The spool E mighthe in't'hc form of an ordinary bobbin;"'0r of other convenient shape, the spool carrier being correspondingly shaped to receive or carry it, but in the drawings we have shown a spool of the ordinary disk-shaped kind, which revolves within a cylindrical in the spool carrier. The spool is convenientlyheld in position in the aforesaid recess by a pivoted arm, such as 0 on the spool carrier, so that on turning back the arm the spool will fall out of place, being assisted if necessary by a spring '0 situated atthc back of the spool and normally under compression.

\Vhen the spool l) is placed within its carrier E the spool thread E is slipped, through the opening 1G" in the carrier E, into the channel 1;, and when the spool thread is pulled it folds back and passes along the said channel (1", which is curvedso as to guide the thread into a central position in the carrier by the time it has reached the upper part of the said carrier The thread. on being further pulled passes directly out at the left hand side of the spool and between the checks 0* c of the carrier E, the check a being detachably secured to the cheek a? by a set screw 6,- by

tightening or loosening the set screw 0 the spool thread IQ is more or less firmly held, the checks a e thus constituting a convenient form of tension device for the spool D oscillates, the needle A reciprocates passof the arm F is provided with vdjlo'ek f hook at ing slightly on one side of the spool thread, and when the needle is rising from its depressed position the hook d on the disk D engages with the needle thread C and draws out a loop of thread. After the disk has completed its forward movement, which happens-when the hook (Z has passed a short way beyond the lower end of the spool carrier E the said disk returns, that has been drawn ofi passes around and over the spool carrier as shown in Fig. 6, and around and over the spool thread E which is drawn from the spool E as in the ordinary lock stitch sewing machines. After the loop of thread C, which now embraces the spool thread E as shown in Fig. 7, has been pulled by the take up tight against and into the material, a second loop is drawn from the needle thread C and passed around the spool carrier E as shown in Fig. 8, and the same operations are repeated. It will thus be clearly seen that a lock stitch is produced.

In the above description of the operations, it has been assumed that the loop can slide over the curved back of the spool carrier E This carrier however has to be held in position against the'periphery of the disk D,

rocking arm 6 which is pivoted on a guard plate E which normally bears upon the 001 carrier and thrusts it toward the disk and away from actual contact with the guard plate. The manner in which this rocking arm is actuated so to ofier no obstruction to the travel of the loop over the back of the spool carrier will be hereinafter described. I

In some cases, especially when large spools are being'used, it may be desirable to provide a device for expanding the needle thread loop so as to make it pass easily over the spool carrier. For this purpose the loop expanding device may in the case of an oscillating disk as shown in Fig. 1 comprise an arm F pivoted on the shaft D so as to be capable of rocking in a plane perpendicular to that of'the disk D; one end of this arm is formed with a block f shaped as shown in thedrawings so as to lie alongside the hook d when in its normal position, the other end a-canrshaped projection f for engagement the end of its forward movement and-the needle thread loop is-about to pass-over the spool carrier E thecam shaped projection "911 the arm F engages with the bar G and tihjreby becomes tilted in opposition to the "spring f in such a way that the other end or and from the face of the disk; the

needlethread loop, being looped over the ifigh putward movementof the said block,"

:hook d andblock 7, becomes expanded by and the loop I the means shown in Fig. 1 comprising a' the fiat side with a pro jectingbar G. When the disk is nearing moves outwardly away from the CfiIIlBI.

situated that when the said bent lever is rocked, the said fingers k if on the arm H thereof just graze the flat side of the spool carrier E and therefore engage with the loop of thread C and help to carry it over the said carrier.

During the forward movement of the disk the segmental stop It comes into contact with the concentric segment 7& on the arm H, thus moving the said bent lever into the dotted position shown in Fig. 1 in opposition to a spring it which tends to return the said bent lever to the position shown in full lines; While the disk finishes its forward movement andstarts its return movement the stop h is holding the bent lever in the position shown in dotted lines, and when the disk has moved in its return movement through a sufficient angle to release the loop, from the hook d, the segmental stop it moves away from the segment h", thereby allowing the spring it to rock the bent lever into the position shown in full lines with the result that the fingers h if carry the loop across.

of the spool carrier E As the loop passes bet-weenth'e spool carrier E and the rocking arm 6, the latter is momentarily rocked so as to allow the loop to pass beyond it. This rocking of the arm 6 may be effected in, any convenient way; a projection. It on the arm H may for example ,be caused to engage with a tail piece 6* on the said rocking arm, so that when the loop of thread C spool carrier E the projection it" will engage with said tail piece e and movethe' lower end of said rockingarm away from the surface of the spool carrier in opposition to a spring 0; The spool carrier is meanwhile held in posit-ion by the'upper end of said rocking arm bearing against it. When the loop has passed beyond the lower end of the spool carrier, the projection h passes beyond the end of the tail piece 6 owing to the further rocking of the lever arm H and the spring e then returns the rocking arm 6 loop to -pass over the upper part of the'spool Referring now to the mechanism for produeing two stitches per revolution of the ,to its normal position thereby allowing the disk, and illustrated in Figs. 9-13 and 16- 23, more particularly in Fig.3, it will seen that two hooks d d" are provided. Each of these hooks forms part of a rocking piece d loosely mounted on an arm (Z pivoted 'to the front face of the disk. Facing a the disk Dis stationary plate K on the pivoted arm (Z and hook d to be moved .to'rward relatively to the disk with the result that the hook by reason of its increased speed tully enters the needle thread loop thereby obtaining a lirni hold of the thread,

rshaping' the loop, and easing the action of and giving more time for the take up than if the hook traveled only at the speed of the disk.

l t will be understood that when the needle has descended inlTo the cavity d" in the disk formed to receive it and beginning to ascend. the hook d engages the thread and draws a loop therefrom. lVhen the hook reaches the iosition shown in Fi 9 the hook requires to he tilted backward toallmv the loop to escape and be drawn by the take up around and over the spool carrier. The required tilting of the hook may be cll ected by any app opriate means. such as those shown which comprises a pin (Z projecting from the rocking piece (Z1 outward away from the disk and adapted to engage with a. projection /l: f). and ill) on the stationary plate K; as the dislc'rotates, the pin 7" first engages with the projection If and the contiinicd movement. of the disk and hook thou causes the said projection Z to tilt the hook/Z lu ckward sullicienlily to rclcasc the loop of thread as shown in Fig. 20. 'lhe hook 11 and rocking piece (1 are alternately tilted to such an extent that the outward angular movement. of the rocking piece 1! carries the pin d" beyond the end of the projection N, the latter being of such a length as to enable this to lake place. As sooxras the pin (5 has passed'beyond the end of the projection 71. a suitable conlriw anre such as a spring connected from a point on the pivoted arm d to a point on the rocking" piece 2Z rcturnsthe said rocking piece and with it; the hook kl to their normal position. The further movement at the disk causes the pivoted arm (Z to ultimately assume its normal position by the aid of the cam groove Z: and pin (Z ready to engage with the needle thread again in due course. in this term of mechanism the means for assisting each loop of thread over the sides of the spool carrier may comprise a guide 'each revolution of the disk. a.ch loop when being drawn up is engaged piece d pivoted at (Z to the rear face of the disk. A. pin d" 22 and 23) fixed to or forming part of some stationary part of the machine is so situated as to engage with the hooked portion .5 of said guide piece, so that as the disk continues its movement, the pin (Z causes the guide piece (Z to be turned outward about its pivot (Z at the correct moment and thus assist the thread over the flat side of the spool carrier. The guide piece d may afterward be brought back to its normal position by grazing against some stationary portion of the machine such as the bed plate B the disk continues viii movement and carries the said guidefpiece d with it. The outer edge of the guide piece a? is preteral'ily concavein shape so that when a loop of thread is being drawn up over the spool carrier, the thread on the rear face of the carrier willv be engaged by and lie in the depressed region of th guide piece and he lifted across the rear face of said spool carrier as aforesaid. On the front face of the spool carrier the thread may be expanded and assisted by flange al on the disk extending laterally slightly beyond or at least as far as the face of the spool carrier. The forward end of the flange is sloped off down to the face of the disk so that as the loop of thrca d is being drawn ott from the needle, the front.- thread oi. the loop will be guided outward away trom Contact with the front face of the disk sulllciontly to pass freely over the front face of the spool Cfll'IlG-l'.

A modified construction of means for assisting the back thread of the loop over the back face of the spool 'arrier is shown in Fig. if). in this construction a. curved segmental arm N pivoted at N to a stationary part. of the maritime is provided with a lug N carrying a pin N which works in a. cam groove N on the back of the disk D. The arm I? when in its inward position lies adjacent to and on one side of the periphery oi the disk and. as the disk rotates, the cam groove h causes the an N to move out-ward into the dotted pcsi on twice to by and lies in the groove N formed on the edge of the semncntal a rm, and is assisted by it across the flat. taco of the spool carricrl ln 9 and 10 the outline only of the spool carrier is shown, but itwill be understood that it may be constructed to carry a spool in the same way as described with reference to Figs. 1 In order to keep the spool carrier in position, on the of the disk, suitably modified means will The thread of p periphery l'iowever be required. I Such means may comprise two prongs P, I, each of which is pivoted at. one end on a spindle 19" dependlng.:t'rom the underside of the bed plate, and has its time end normally pressed the under framework of the machine.

, disk shaft D The disks Q, Q are provided understood, should be the case.

with diametrically situated projections or camsurfaces qg and g g? respectively, and

-these projections or cam surfaces are so' placed relatively to each other that the free end of each of, the prongs P, P is caused to recede a small distance away from the spool carrier E twice during each revolution of the disk shaft. The receding movement takes place at the correct interval for allowing the bight of each loop of thread, as it is being drawn up, to pass over theback of the spool carrier. It will hie seen that the lower rong P receives its receding movements slightly prior to the upper prong P, as, it will be What we claim and desire to secure by. Letters Patent ofthe United States is 1 In a double thread sewing machine, the combination with a reciprocating needle,

of a loop, drawing device for the needle thread movable about an axis,-a lower thread bobbin carrier supported by i and exterior to the path of ,movement of said loop drawing device, and means for. causing the needle thread loop to pass'bodilyi around the bobbin ca'rrier to' form a lock stitchiwith a lower thread. M 1

.2. In a doumread sewing machine, the combination with a reciprocating needle, of-a revoluble loop drawing device for the, needle-thread, a lower thread bobbin carrier supported by and exterior to the path of movement of said loop drawing (1617106, and means for causing the-needle thread loop to pass around the bobbin carrier to form a lock stitch with said lower thread. 3. Ina double thread sewing machine, the combination with a reciprocating needle, of a loop drawing device for the upper thread. movable about an axis, a lower thread bob bin carrier supported by and exterior to the loop drawing device toward which said de, vice ismova'bleflwhen drawing the thread"; means disengaging the' upper loopthread from the drawing device, and .meansfdtia stitch.

causing th"s aid loop to pass around at outer :end of said bobbin carrier, and over} the-same and the lower thread to form a lock 4.- In a double thread sewing machine;

a disk angularly movable about ax1s,a stationary spool thread carrie terinrlt'o I and in. sliding contactwith th eriph' edge "of said disk, and a: hook I said disk for engaging the neddie thread and drawing a loop of" thread therefrom in such manner that when said loop is disengagged and drawn up it will pass around and over said spool thread carrier and over the spool thread to form an ordinary lock stitch.

' 5. In a double thread sewing machine,

the combination with the reciprocating needle, of a needle thread loop drawing de- -vice angularly displaceable about an axis, a spool thread carrier situated exterior to said loop-drawing device and in peripheral contact therewith, and means whereby a loop of the needle thread in the course of being drawn out and drawn up embraces and passes completely over the aforesaid spool threadcarrier forming a lock stitch with the spool thread.'

6. In a double thread sewing machine, the combination with the reciprocating needle, of a needle thread loop drawing device an gularly displaceable about'an axis, a stationary s ool thread carrier situated exterior w to said loop-drawing device and in sliding contact withits periphery, and means where by a loop of-the needle thread in the course of being drawn out and drawn up embraces and passes completely over the aforesaid spool thread carrier forming a lock stitch with the spool thread.

7. In a double thread sewing machine, the.

combination with the reciprocating needle,

of a needle thread loop drawing device angularly displaceable about an axis, a spool thread carrier situated exterior to said loop drawing device and in sliding contact with its periphery on one side of its axis, and

means wherebya loop of the needle thread in the course of being drawn out and drawn up embraces and'passes completely over the aforesaid. spool thread carrier forming a lock stitch wit-h'the spoolthread, and means for assisting the loop over the spool thread carrier.

8. In a double thread sewing machine, 'the' combination with the reciprocatingneedle, of a disk angularly movable about its axis, a spool thread carrier exterior to and extending concentrically over a portion of the periphery of the disk, and a hook on said disk for engaging the needle thread and drawing a loop of thread therefrom in such a way that the loop when disengaged and being drawn up" will pass around and over thespool thread carrier to form with the spool thread a lock stitch.

9. In a double thread sewing machine, the,

\ combination with the reciprocating needle.

of a disk angularly movable about its axis,

a stationary spool thread carrier exterior to and extending over less than half the periphery of the disk, andahook on. said disk for engaging the needle thread and drawing a loop of thread therefrom in such a way that the loop when disengaged and being drawn up will pass around andover the threada lock stitch.

10. In a double thread sewing machine the combination with the reciprocating needle, of a disk angularly movable about its axis, a stationary spool carrier riding on the exterior of the disk and on approximately one quadrant of its periphery, and a hook carried by said disk for engaging the needle thread and drawing a loop of thread there from on one side of the spool thread in such a manner that when disengaged and being drawn up the loop will pass around and over the said spool carrier and around the spool thread to form anordinary lock stitch. I

11. In a double thread sewing machine, the combination with the reciprocating needle, of a disk angularly movable about its axis, a spool thread carrier exterior to the disk, a movable hook on said disk for engaging the needle thread and drawing .a

loop therefrom, and means for actuating" the hook relatively to the disk to release the thread before the disk has turned through one hundred and eighty degrees from the point of enga ement of the loop in such a manner that wI being drawn up the loop will pass around and over the spool carrier and around the spool thread to form an ordinary lock stitch.

12-. In a double thread sewing machine, the combination with the reciprocating needle, of a rotary disk, a stationary spool carrier exterior to and riding on the periphery of said disk, ahook carried by said disk for engaging the needle thread and drawing a loop of thread therefrom, and means for actuating said hook to release the thread before said hook after taking the loop has turned through an arc of one hundred and eighty degrees in such a manner that when disengaged and being drawn up the loop will pass around vand 'over the said spool carrier and around the spool thread to form an ordinary lock stitch.

13. In a double thread sewing machine,

the combination with the reciprocating needle, of a disk,angularlyniovable about an axis, a stationary spool carrier exterior to and riding on the periphery of said disk, a hook carried by said disk for engaging the needle thread and drawing a loop of thread therefrom in such a manner that when disengaged and being drawn up the loop will pass around and over the said spool carrier and around the spool thread to form an ordinary lock stitch, and means for assistiifg the loop over the spool carrier.

14. In a double thread sewing machine the combination with the reciprocating needle, of a disk angularly movable about ts axis, a stationary spool thread carrier ex *erior toand situated against a portion of the periphery of said disk, a hook carried 1en disengaged andby'said disk for engaging the needle thread i and drawing a loop of thread therefrom in such a manner that when disengaged and being drawn up the loop will pass around and over the said spool thread carrier away from said disk and around the spool thread to form an ordinary lock stitch, and means for assisting the loop over the spool thread carrier.

15. In a double thread sewing machine the combination with the reciprocating needle, of a rotary disk, a stationary spool thread carrier exterior to v and situated against a portion of the periphery of said disk, a hook carried by said disk for engaging the needle thread and drawing a loop of thread therefrom in the direction of the spool thread carrier, means for actuat-' ing said hook to release the loop soon enough for it when being drawn up to pass around and over the said spool thread carrier and around the spool thread to form an ordinary "lockst'itch, and movable means for assisting the loop over the spool thread carrier.

16. In. a double thread sewing machine, the combination with the reciprocating needle, of a disk angularly movable about that when disengaged and being drawn up the loop will pass around and over the said spool carrier and around the spool thread to form an ordinary lock stitch, means for retaining the spool carrier in contact with the periphery of the disk, and means for ac tuating said spool carrier retaining means to allow the loop of thread to pass the latter and over the spool carrier.

17. In a double. thread sewing machine, the combination with the reciprocating needle, of a rotary disk, a stationary spool carrier in contact with said disk, a movable hook carried by'said disk for engaging the needle thread and drawing a loop of thread therefrom, means for actuating said hook to .mlgage the thread before the disk has turned through one hundredand-eighty degrees in such a manner that when disei'igaged and 7 being drawn up the loop will pass around and over the said spool carrier and around the spool thread-to form an ordinary lock stitch, means for retaining the spool carrier in contact-with the periphery of the disk,

needle, of a disk angularly movable about its axis, a spool thread carrier exterior to the disk, a movable hook onsa'id disk for en-."'

gdgiug the needle thread and drawing loop therefrom, means for actuating the gaged and being drawn up the loop will pass around and over the spool carrier and around the'spool thread to form an ordinary lock stitch, and means ;-for causing the hook to move forward relatively to the disk when the hook is engaging the needle thread and for'causing it to move rearward relatively to the disk when the needle thread is being released from engagement with said hook.

19. In a double thread sewing machine, the combination with the reciprocating needle,

. of-a disk angularly movable about its axis,

Qthread to pass the latter and a spool thread carrier situated on a portion of the periphery of the disk,a hook on said disk for engaging xtheneedle thread and drawing a loop of thread therefrom in such a way that the loo-p when disengaged and being drawn up will pass around and over the spool thread carrier to "form with the spool thread a lock stitch, and means for causing the hook to move forward relatively to the disk when the hook is engaging the needle thread, and for causing it to move rearward relatively to the disk when the needle thread is being released from engagement with said hook.

20. In a double thread sewing machine the combination with the reciprocating needle,

of a rotary disk, a spool thread carrier eX- terior to and'situated against a portion of the periphery of said disk, a rocking hook carried by said disk for engaging the needle thread and drawing a loop of thread therefrom in the direction of the spool thread- 4 carrier, and means for actuating said hook '40 to release the loop soon enough for it, when being drawn up, to pass around and over the said spool thread carrier and around the spool thread to form an ordinary lock stitch.

21 In a double thread sewing machine the combination with the reciprocating needle, of a disk angularly movable about its axis,

a stationary spool thread carrier situated against a portion of the periphery of said disk, means for preventing lateral movement thereon, a hook carried by said disk for engaging the needle thread and-drawing a loop of thread therefrom in such a manner that when disengaged and being drawn. up the loop will pass around and over the said spool carrier and ardund the spool thread to form an ordinary lock stitch, means for retaining the spool thread carrier in contact with the periphery of the disk, and means foractuating said spool thread carrier retaining means to allow the loop of over the spool thread carrier.

22. In a double thread sewing machine, the combination with the reciprocating needle, of a rotary disk, a stationary spool carrier in contact with said disk, a hook carried by said disk for engaging the needle thread and drawing a loop of thread therefrom, means for actuating said hook to release the thread; before the disk has turned through one hundred and eightydegrees in such a manner. that when disengaged and being drawn up the loop will pass around and over the said spool carrier and around the spool thread to form an ordinary lock stitch, and means for causing the hook to travelforwardly rela tively to the disk when the hook is engagi'ng the needle thread and for causing it to move rearward relatively to the disk when the needle thread is being released from engagement with said hook.

23. In a doublethread sewing machine, the i combination with thereciprocating needle," of arotary disk, a stationary spool thread. carrier situated against a portion of the periphery of said disk, means for preventing lateral movement thereon, a hook t ara; ried by said disk for engagin the needle thread and drawin a loop of tread there from in the direction of the spool thread carrier, means for actuating said hook to release the loop soon enough for it when being drawn up to pass around and over the said spool thread carrier and around the s 001 thread to form anordinary lock Stltch, means forlretaining thespool thread carrier in contact with the periphery of the disk,

and means for actuating the spool thread carrier retaining means to allow the loop of thread tovpass the latter and over the' spool thread carrier. i s 24. In a double thread sewing machine, the

combination with the reciprocating needle,

of a rotary disk, a rocking piece carriedby said disk, a stationary spool carrier, a hook on said rocking piece for engaging the needle thread and drawing a loop of thread therefrom, a pin on said rocking piece, a

stationary projection engaging with said pin to tilt the rocking piece and thereby release the loop from the hookwhen the latter has drawn out said loop sufficiently to enable it when being drawn up to pass over the spool carrier, andmeans for causing the, hook to travel forwardly'relatively to the disk when said hook is engaging the needle thread, and for causing it to travel rearwardly relatively to the disk when the needle thread is being released from engagement:

with said hook:

25, In a double thread sewing machine, the combination with the reciprocating needie of a rotary disk, a stationary spool car-' rier, an arm pivoted on saiddisk, a rocking piece mounted on said arm, a ll0Ok{.OIl said rocking piece for engaging the needle thread and drawing a loop of thread therefrom, a pin on said rocking piece, a pin on said pivoted arm, a stationary cam groove in which the pin on the pivoted arm slides for rocking said pivoted arm forward and backward relatively to the disk at the required PBllOtlS, and a sihitionary pro ection for engaging with thegpi u: on the rocking piece to.

tilt the latter and thereby release the loop from the hook when said hook has drawn out the loop sufficiently to enable it when being drawn up to passover the spool. carrier.

26. In a double thread sewing machine of the kindhei'euihefore described, the combination with the reci 'irocating needle, of

a rotary disk, a stationary spool thread can rier situated against a portion. of the pe riphery of said disk, a hook carried by said dlskfor engaging the needle thread and drawing a loop of thread therefrom in. the j direction of the spoolthread carrier, means for actuating sard hook to release the loop dle, of a rotary disk, a stationary spool thread carrier situated against a per 'on of the periphery of said disk, a-rocking piece carried by said. disk, a hook on said rocking piece for engaging the needle thread and drawing a loop of thread therefrom in the direction of the spool thread carrier, :1. pin on said rocking piece, and a stationary projection engaging with said pin to tilt the rocking piece and thereby release the loop from the hook when the latter has drawn out said loop suiiiciently to enable it when be ing drawn up to pass over the spool thread carrier.

28. In a double thread sewing machine, the combination with the reciprocating needie and a spool thread carrier, of looppull- .ing means for engaging the needle thread a plurality of times in succession during one complete cycle of movements of the afore said means, and a take-up for causing each loop after being drawn out to cooperate with the spool thread and form a completed lock stitch before the succeeding loop is engaged.

29. In a double thread machine, the com bination with the reciprocating needle and a stationary spool thread carrier, ht a rotary member having thereon a plurality of hooks for successively engaging the needle thread during one revolution of the said rotary member, and a take-up for causing each loop after being drawn out to cooperate with the spool thread and form a completed lock stitch before thesuccocding loop is engaged.

30. In a double thread machine, the combination with the reciprocating needle, and a stationary spool thread carrier, of a rotary disk, a plurality of hooks attached thereto for, each in turn, engaging the needle thread during one revolution of the disk, and a take-up for causing each loop after being drawn out-to cooperate with the spool thread and form a completed lock stitch before the succeeding loop is engaged. v

31. In a double thread sewing machine, the combination with a reciprocating needle, of a revoluble loop pulling means for onon giirg the needle thread and drawing out a io p, means for releasing the loop within an aloof I80 of angular movement, a lower thread bobbin'carrier supported by and en t'erior to the path ofmovenient ot' the revotable 160p pulling means,iand a take'-up lo rdrawing up the loop arouiirl the spool thread and spool carrier and thereby completing the stitch before the said loop pulling means has completed a soon-revolution.

32. In a double thread sewing machine, the combination with the reciprocating needle, and a spool thread carrier, of a plurality of loop drawing devices revoluble about a common axis for engaging in succession the needle thread and each in turn drawing out a loop and releasing the same within an arc of one hundred and eighty degrees of angular movement. I

In a double thread sewing machine, the combination with the reciprocating needle, and a spool thread carrier, of a rotary disk, and a plurality of loop drawing devices upon said disk for engaging in succession the needle thread and each in turn drawing out a loop and releasing the same within an arc of one hundred and eighty degrees of angular movement.

34:. In a double thread sewing machine the combination with the reciprocating needle and a spool thread carrier, of rotary means providcd with a plurality of loop drawing devices for engaging in succession the needle thread andeach in turn drawing out a loop of the same, and means for disengaging, in the order of their drawing, said loops from the loop drawing devices before they have traveled through an angular distance of 180 degrees from the point of picking up the loop, and in position to en age the spool thread and produce therewith a plurality of completed lock stitches during one rotation of the loop pulling means.

35. In a double thread sewing machine, the combination with the rociprocatim needle, of a rotary disk, a stationary spoo carricr, a plurality of hooks carried by said disk for engaging the needle thread and drawing a plurality of loopso't thread therefrom during one rotation'of said disk, and means for actuating each of said hooks in its turn to release the corresponding loop before the disk has turnedthrough one hundred and eighty degrees in such a manner that the loops when released and drawn baekover the spool carrier-form a plurality of lock stitches with the spool thread.

36. In a double thread sewing machine,

the combination with the reciprocating nee-.

dle, of a rotary disk, a stationary carrier a plurality of hookscarrled by said disk or engaging the needle thread and. drawing a plurality of loops of thread therefrom durins; one rotation of said disk means for actuating each of saidhooks in its turn to release the-corresponding loop of thread before the disk has turned through one hunplurality of hooks carried by said disk for engagingthe needle thread and drawing a plurality of loops of thread therefrom during one rotation of said disk, means for ac tuating each of, said hooks 111 its turn to release the thread before the disk has turned through one hundred and eighty degrees in such a manner that the loops when released and drawn back over'the spool carrier form a plurality of lock stitches with the spool thread, and means for causing the hook to travel forward relatively to the disk when said hook is engaging the needle thread and for causing it to travel rearward relatively to the disk when the needle thread is being released from engagement with said hook.

38. In a double thread sewing machine, the combination withthe reciprocatingnee die, of a rotary disk, a stationary carrier, a plurality of arms pivoted on said disk, a

rocking piece on each of said arms, a hook.

on each of said rockin pieces for engaging the needle thread and drawing a loop; of thread therefrom at each correspondin reciprocation of the needle, a pin on eaci of said rocking pieces, a pin on each of said,

pivoted arms, astationary cam groove in which the pins on the pivoted arms slide for rocking} said pivoted arms forward and backward relatively to the disk at the required periods, and a stationary projection for engaging with-the pins on the rocking pieces to tilt the latter and thereby release the loops from the hooks when said hooks have drawn out the loops sufficiently to enable them when being drawn up to pass over the-spool carrier. a

39. In a double thread sewing machine, the combination with the reciprocating needle, of a ;'rotary disk, a stationaryspool with tthread carrier-situated against a portion of the periphery of said disk, a plurality of hooks carried by said disk for engaging the needle thread and drawing a plurality of loops of thread therefrom in the direction of the s ool thread carrierduring. one rotatlon o SBQId disk, and means for actuating each of said hooks 111 its turn to release each loop soon enough for each when being drawn up to pass over the spool thread car-- rier and thereby form a plurality of lock stitches with the spool thread.

40. In a double thread sewing machine the combination with the reciprocating needle, of a rotary disk, a stationary spool thread carriersituated against a portion of the periphery of the disk, a plurality of hooks carried by said disk for engaging the needle thread and drawing a plurality of loops of thread therefrom in the direction of the spool thread carrier during one rotation of the-said di'sk, means for actuating each of said hooks in its turn to release each loop soon enough for each when being drawn up to pass over the spool thread carrier and thereby form a plurality of lock stitches ing the loops over the spool carrier.

41'. In a double thread sewing machine the combination with the reciprocatin needle, of a rotary disk, a stationary spoo thread carrier situated against a portion of the peripher of the disk, a plurality of hooks carrie by said'disk for engaging the needle thread and drawing a plurality of loops of thread therefrom in thedirection of the spoolcarrier during one rotation of said disk, means for actuating each of said hooks e spool thread, and means for assist:

in its turn to release each loop soon enough for each when being drawn up to pass over the spool carrier and thereby form a plurality of lock stitches with the spool thread, and means for causing each hook to travel forward relatively to the disk when such hook is engaging the needle thread and for causing it to travel rearward relatively to the disk when the needle thread'is being released from engagement with said hook. f

42. In a double thread sewing-machine the combination with the reciprocating' needle, of a rotary disk, a stationary spool thread carrier situated against a portion of the periphery of the disk, a plurality of arms pzivoted on'sajd disk, a rocking piece on eac of said arms, a hook on each of said rocking pieces for" engaging the, needle thread and drawing a loop of thread thereat e ach correspondiiig reci rocation of, the

. needle, a pin on eaphpf'sai rocking pieces, a pm on each of said pivoted arms, a stationarycam groove in which the'pins on the pivoted arm 'slide for rocking said -pivoted arms forward and backward' elatively from inthe direction of the spool .carrier' to the disk at the required periods, and a In testimony whereof we aflix oursignastationary proje 'tion for engaging with the tures in presence of two witnesses. pins on the rocking piecesvto tilt the latter FREDERICK BAKER. and thereby release the loops from the hooks LESSER JACOBS. when said hooks have drawn out the loops Witnesses: sufficiently to enable them when being drawn H. D. J AMEsoN, up to pass over the spool thread carrier. F. L. RAND.

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