US2516875A - Rotary take-up for sewing machines - Google Patents

Description

,1950 a. A. HOLLAND 2,516,875

ROTARY TAKE-UP FOR SEWING MACHINES Filed June 15, 1948 4 Sheets-Sheet l INVENTOR W ATTO R N EY I- 1950 s. A. HOLLAND 2,516,875

ROTARY TAKE-UP FOR SEWING "MACHINES Filed June 15, 1948 4 Sheets-Sheet 2 mun" INVENTOR BY G/en fi/v-ml ATTORNEY 8- 1, 1950 s. A. HOLLAND 2,516,875

ROTARY TAKE-UP FOR SEWING MACHINES Filed June 15, 1948 4 Sheets-Sheet 5 INVENTOR I i ATTORNEY G/cm Hiya/[Md I Aug. 1, 1950 G. A. HQLLAND 2,515,375

ROTARY TAKE-UP FOR SEWING MACHINES Filed June 15, 1948 4 Sheets-Sheet 4 NVENTOR ATTORNEY Patented Aug. 1, 1950 UNITED STATES PATENT 0F Fil CE ROTARY TAKE-UP FOR SEWINGMACHINE.S

Glen A. HollanduBronxville, N. Y., assignor "to The Yale & L 'Iowne.ManufacturingCompany, Stamford, Conn, a corporation of Connecticut Application dune 15, 1948, Serial'No. 33,136

This invention relates to a sewing machina-and more particularly, a sewing machine of thetype shown and described in my application Ser. No.

630,288, filed November 23, 1945.

As is set forth in my earlier application, there it ing rotary take-up mechanisms, these rotary:

take-ups do not lend themselves'to the type of simple threading that I believe is essential in a domestic sewing machine. In addition, the rotary take-ups of the prior art have a tendency toentrap the thread when the thread is broken so as to wind considerable lengths of the thre'ad about the mechanism. This makes itnecessary'to perform a difiicult thread unwinding and disentangling operation each time that the thread is broken. In order to minimize the damage done, 3.

thread cutters are provided in commercial sewing machines of the particular -class, the thread cutters serving to cut the thread andthereby to prevent the ent-rapping thereof. However, thread cutters are not entirely satisfactory, and certain ly are not desirable in sewing machines.

In my application supra, I disclose a rotary take-up mechanism that is particularly adapted for ready cooperation with a thread placed-across Thereby, my take-up .qc

its path of movement. mechanism is readily adaptable for use in a machine of the type in which the thread is moved preferably in a single plane from the spool to the needle and without any manipulation relatively to auxiliary guide means such as is required generally in prior art machines. In addition, :the take-up mechanism of my earlier application is self-stripping, so that its more movement with the thread during thetake-up stroke is-effective to move the thread into a position wherein it strips off the take-up mechanism.

To accomplish the purposes of the invention, the machine of earlier application utilizes a rotary take-up finger that contacts the thread at a particular point of its movem'entwhere the thread is maintained across the path of the take-up finger. The take-up .fingercstrikes the thread and then-rotates to take up the thread. During the 'take-up'rotationa camming corstrip- 31 Claims. (C1. 1 12-248 ping surface of thetake-Zup finger moves into conpa 2 tact withthe thread and gradually earns the thread relatively to the take up finger into posit'ion for full stripping fromthe' finger. While this mechanism of my earlier application is extremely effective, I believe that I have now conceived a rather considerable improvement thereon whereby far better results are obtained than are pos- "siblein my earlier machine. Thus, in my new machine, I utilize-a take-u finger that movesat a variable speed, and wit'n the speed variations so arranged that after the take-up stroke is completed, the finger moves faster than the movement of the thread by the usual bobbin hook: Because ofthe particular arrangement, slack is developed between the takeup finger and the thread. During that portion of the cycle when theslack is so developed, the take-up-finger is so positioned relatively to the thread that there are he retaining or *detent means present to hold-the thread against endwise movement off the finger. As "a matter of fact, the "finger is preferably so constructed that at the particular moment when the slack is doveloped the thread willrnove with considerable ease off the end-of the finger. Because of the particular arrangement, the thread sheds very readily off the take-up finger during the creation of the slack between-thethread and thefinger,

and immediately thereafter the bobbin hook takes 'up alll the slack Jof the thread and .positions the thread across thep'ath of the take-up finger just .as the said finger :once again contacts 'the thread for beginning. the next take up cycle.

While l prefer that .arrangement of my structure whereby slack is actually created between the ringer and the thread, it is possible to operate my sewing machine effectively without slack, by forming the surface of the take-up finger so that 'it readily sheds the thread, just after the endo'f the take-upstroke. However, it is well at this point to emphasize that the most effective results are obtained through the utilization of the entire combination of my invention rather than through utilization 'of sub-combinations there of. Nevertheless, I believe that I am entitled to claims covering sub-combinations of my invention, andsuch claims will be appended hereto.

l .have thus outlined :rather broadly the more important features of my inventionin order that the detailed description thereof that follows may be better understood, and in order that my con-- tribution to the art may bebetter appreciated. There are, of course, additional features of my invention that will be described hereinafter and which will form the subject of the claimspap pended hereto. Those skilled in the art will appreciate that the conception on which my disclosure is based may readily be utilized as a basis for the designing of other structures for carrying out the several purposes of my invention. It is important, therefore, that the claims to be granted me shall be of sufficient breadth to prevent the appropriation of my invention by those skilled in the art.

Referring now to the drawings, Fig. 1 is an elevation of my sewing machine illustrating its general construction andouter contour. Fig. 2 is a vertical view of the front end of my sewing machine with certain of the parts thereof removed so as to better illustrate the operating mechanism. Fig. 3 is a view looking downwardly on the mechanism of Fig. 2. Fig. 4 is a perspective view of the take-up finger and the parts immediately cooperating therewith. Fig. la is a view showing the take-up finger of Fig. 4 in a different position. Fig. 5 is a vertical section .taken along lines 5-5 of Fig. 2. Fig. 6 is a vertical section taken along lines 66 of Fig. 5. Figs.

7 to 10 are diagrammatic views illustrating different operating positions of the take-up finger and thread.

Referring now more particularly to the drawings, and especially Fig. 1, my sewing machine comprises a hollow base member l that is formed integrally with an upper hollow arm ll, arm II I having formed on its left end what I term a head 12. The base of the machine is so designed that a rubber pad 13 may be secured thereto for the purpose of holding the machine against slipping on a smooth surface, and also for dampening vibrations.

Within the base of the machine l0 there is mounted a suitable electric motor N that drives a conventional bobbin hook l5, the hook I being carried on the main shaft of the motor [4. The extreme right end of the motor shaft carries a pulley t6, the pulley l6 driving a belt [I that in turn drives an upper shaft It. A hand wheel I9 is secured to the shaft l8 for imparting rotation thereto when desired. In accordance with the teachings of the prior art, the shaft of the motor M and the bobbin hook l5 makes two rotations for every rotation imparted the upper shaft [8.

construction of the machine of my invention so far described is the same as that set forth in more detail in my earlier application to which reference may be made.

The forward end of the upper shaft 18 is suitably mounted in a bearing member 22 supported by parts of the head casting as well illustrated in Fig. 5. The shaft It has secured thereto for integral rotation therewith what I call a driving disc 23, this driving disc being rather oddly shaped in order that it may be properly counterbalanced. A driving pin 24 is carried by a portion of the driving disc 23 as is probably best seen in Fig. 6, and mounted about this driving pin is a relatively small crank 25 and a relatively larger and longer crank 26. The longer crank 26 is pivoted at 21 to a bracket 28 secured about the nee- 4 dle shaft 29 and there held by a screw 30. It is, of course, obvious that the lower part of the bracket 28 is bifurcated to fit about the needle shaft 29 and that the arms of the bifurcated bracket are held by the screw 30.

The relatively smaller crank 25 is pivoted at 3i to a crank 32, the crank 32 being formed as an integral part of a shaft 33. The axis of the shaft 33 is vertically above and somewhat to the right of the axis of shaft 18 as can best be seen from Figs. 2 and 5. In other words, there is an eccentric relationship between shafts l3 and 33 so that while shaft 33 will make one revolution during the time that the shaft I8 makes one revolution, the shaft 33 will operate at varying speeds during the revolution as against a. uniform speed of the shaft 18.

Shaft 33 is suitably supported for rotation through a bearing disc 35 carrying a bearing member 36 as is best seen in Fig. 3. Secured for rotation integrally with the shaft 33 is a takeup disc 37 held assembled to the shaft 33 and its crank 32 by a screw 38. Take-up disc 31 has formed thereon a take-up finger 39 best shaped as is well illustrated in Figs. 4, 4a, and 5. It will be noted that the take-up finger has a detent portion 40 that in one position of the finger and disc overlies a part of the thread so as to prevent endwise removal of the thread from the finger. I shall presently describe in detail the operation of the finger and the manner in which it coacts with the thread.

The bobbin hook 15, as was earlier indicated, is of conventional construction and operates as do all such mechanisms. Cooperating with the hook is a feed system designated generally by reference letter F and best illustrated in Figs. 2 and 6. This feed system is adapted to feed the cloth in the usual manner well known in the art and for that reason I shall not describe its operation. My machine utilizes, of course, the usual needle N secured to the needle bar 29 and moving vertically therewith through operation of the crank 26 actuated by the upper rotating shaft l8. I think it will be unnecessary to describe further the operation of the needle, as its action is the same as that of prior art needles.

A presser foot assembly P is also utilized by me and is operated by a pivoted lever M as is usual in this art. It is the further function of the pivoted lever M to control the tension between a pair of take-up discs 42 best shown in Fig. 2, so that when the presser foot is in its position of Figs. 2 and 6, tension is applied between the discs 42. However, when the presser foot is elevated from its position of Fig. 6, tension is relieved between the discs 62. For adjusting the tension applied by discs 42 to the thread, I utilize an adjusting knob 43, the functioning of which is the same as that of a similar knob in my earlier application.

In my machine I also use an automatic threading attachment A, shown in the several figures,

and relatively to which the presser foot moves make-up finger having a surface for contacting the thread as said finger rotates, said finger taking up the thread by rotation to a take-up position, and means for rotating said take-up finger faster than said thread is moved. from its take-up position whereby said take-up finger sheds said thread as said take-up finger moves beyond its take-up position. 5. In a sewing machine, a take-up finger, means mounting said finger for rotation about ,a fixed axis and in a predetermined plane, said take-up finger having a surface for contacting the thread as said finger rotates frominitial contact with said thread, said finger taking up thethread by rotation to a take-up position, said take-up finger having a stripping surface moving into contact with the thread as said finger rotates from take-up position, and means for rotating said take-up finger faster than said thread is moved from its take-up position whereby said take-up finger sheds said thread as said take-up finger moves beyond its take-up position.

6. In a sewing machine, a take-up finger,

means mounting said finger for rotation about a fixed axis, said take-up finger having a surface for contacting the thread as said finger rotates from initial contact with said thread, said finger taking up the thread by rotation to a take-up position, and means for rotating said take-up finger faster than said thread is moved from its take-up position whereby to develop slack be,- tween said finger and said thread so that said take-up finger sheds said thread as said take-up finger moves beyond its take-up position.

'7. In a sewing machine, a take-up finger, means mounting said finger for rotation about a fixed axis, a drive shaft rotatable in an axis parallel but offset relatively to the axis of rotation of said finger, a crank connection between said drive shaft and the take-up finger whereby said take-up finger rotates at a varying speed relatively to the speed of said drive shaft, said take-up finger having a surface for contacting the thread as said finger rotates, said finger taking up the thread by rotation to ,a take-up position, and said take-up finger having a stripping surface moving into contactwith the thread as said finger rotates from take-up position.

8. In a sewing 7 machine, a takeup finger, means mounting said finger for rotation about a fixed aXiS, a drive shaft rotatable in an axis parallel but offset relatively to the axis of rotation of said finger, a crank connection between said drive shaft and the take-up finger whereby said take-up finger rotates at a varying speed relatively to the speed of said drive shaft, said take-up finger having a surface for contacting the thread as said finger rotates from a position of initial contact with said thread, saidfinger taking up the thread by rotation to a take-up position, said take-up finger having a stripping surface moving into contact with the thread as said finger rotates beyond take up position toward said position of initia1contact,.said crank connection rotating said take-up finger faster than said thread is moved from its take-up p-osition whereby said :take-up finger; sheds said thread as said take-up finger moves beyond its take-up position. i h 9. In a sewing machine, a rotary take-up finger having a surface for contacting the thread, a rotary hook for taking up the thread in coopera tive relation to said take-up finger, said fingertakin up he thread. iii/rotatio from eni ni i thread contacting position toward take-up posi- ,t ion, saidhook taking up the thread and movingit to position for initial contact by said take up finger as the take-up finger rotates from said take-up position toward said initial contact, with the thread, and means for rotating said take-up finger faster than said thread is moved immediately from its take-up position by said hook whereby said take-up finger develops slack between it and said thread as said take-up finger moves from its take-up position toward initial contact with said thread. v

10. In a sewing machine, a rotary take-mp finger having a surface for contacting the thread, a, rotary hookfor taking up the thread in C0-, operative relation to said take-up finger, said finger taking up the thread by rotation from an initial thread contacting position toward take-up position, said hook taking up the thread and moving it to position for initial contact by said take-up finger as the take-up finger rotates from said take up position toward said initial contact with the thread, said take-up finger having a stripping surface in contact with the thread as saidfinger rotates from take-up position toward said initial contact with said thread, and means for rotating said take-up finger faster than said thread is moved immediately from its take-up position by said hook whereby said take-up finger develops slack between it and the thread as said take-up finger moves from its take-up position toward initial contact with said thread.

11. In a sewing machine, a rotary takeup finger having a surface for contacting the thread, a rotary hook for taking up the thread in cooperative relation to said take-up finger, said finger taking up the thread by rotation from an initial thread contacting position to ward take-up position, said hook taking up the thread and moving it to position for initial contact by said take-up finger as the take-up finger rotates from said take-up position toward said initial contact with the thread, and said take-up finger having a stripping surface moving into contact with the thread as said finger rotates from take-up position and toward initial 0011+ tact with said thread whereby said thread is stripped from said take-up finger.

12. In a sewing machine, a take-up finger, means mounting said finger for rotation about a fixed axis, a drive shaft rotatable in an axis parallel but offset relatively to the axis of rotation of said finger, a crank connection between said drive shaft and the take-up finger whereby said take-up finger rotates at a varying speed relatively to the speed of said drive shaft, said take-up finger having a surface for contacting the thread, a rotary hook for taking up the thread in cooperative relation to said take-up finger, and rotating in fixed relation to said drive shaft, said finger taking up the thread by rotation from an initial thread contacting position toward take-up position, said hook taking up the thread and moving it to position for initial contact by said take-up finger as the takeup finger rotates from said take-up position toward said initial contact with the thread.

13. In a sewing machine, a take-up finger, means mounting said finger for rotation about a. fixed axis, a drive shaft rotatable in an axis 'parallel but offset relatively to the axis of rotation of said finger, a crank connection between said drive shaft and the take-up finger whereby said take-upfinger rotates at a varying speed relatively to the speed of said drive shaft, said take-up finger .havingfa surface for contacting the thread, a rotary hook :for taking up the thread in cooperative relation to said take-up finger, and rotating in fixed relationto said drive shaft, said finger takingup the thread by rotation from aninitial thread contacting position toward take-up position, said crankrotating said take-up finger faster than said threadis-moved immediately from its take-up position by said hook whereby said take-up finger sheds said thread as said take-up finger. moves from its take-up position toward initial contact with said thread, and said hook taking up the thread and moving it to position for initial contact by said take-up finger as the takeup finger rotates from said take-up position toward said initial contact with thethread.

114. In a sewing machine, a take-up finger,

means mounting said "finger for rotation about a fixed axis, a drive. shaft rotatable in an axis parallel but ofiset relatively to theaxis of rotation of said finger, a crank connection between said drive shaft and the take-up finger whereby said take-up finger rotates at a varying speed relatively to the speed of said drive shaft, said take-up finger having a surface for contacting the thread, a rotar whook for taking up the thread in cooperative relation to said take-up finger and rotatingin fixed relation to said drive shaft said finger taking up the thread by rotation from an initial thread contacting position toward take-up position, a stripping surface on said finger in contact with the thread as the finger moves immediately from its-take-up position, said crank rotating said take-up finger;

faster than said thread is moved immediately from its take-up position by said hook whereby said take-up finger sheds said thread as said take-up finger moves from its take-up position toward initial contact with said thread, and said hook taking up the thread and moving it to position for initial contact bysaidutake-up fingerras the take-up finger rotates from said take-up position toward said initial contact with the thread.

15. In a sewing machine, a rotary take-up finger having a surface for contacting the thread, a rotary hook for taking up the thread in cooperative relation to said take-up finger, means mounting said take-up finger and hook for rotation on parallel axesvertically spaced from one another, means for holding said :thread substantially vertically from a point above the circular path of saidfingernand leading to said hook, said finger taking up the thread by rotation from an initial thread contacting position at substantially the lowermost position in its path of movementtoward take-up position, said hook taking up the thread and moving it to position for initial contact by said take-up finger as thetake-up finger rotates from said take-up position toward said initial contact with the thread, means for rotating said take-up finger faster than said thread is moved immediately from its take-upposition by said hook whereby said take-up finger sheds saidathread as said take up finger moves from its take-up position toward initial contact with said thread,-said hook completing swiftly its take-up of the thread after it is shed by said take-up finger so as to realign said thread for contact once again by said take-up finger.

16. In a sewing machine, a rotary take-up finger having a surface for contacting the thread, a rotary hook {for taking up the thread 10 in cooperative relation to 'said take-up finger, means mounting said take-up finger and hook for rotation on parallel axes vertically spaced from one another, means for holding said thread substantially vertically from a point above the circular path of said detent and leading to said hook, said finger taking up the thread by rotation from an initial thread contacting position at substantially the lowermost position in its-1 l path of movement toward take-up position, said take-up finger having a stripping surface :in contact with the thread as said finger rotates from take-up-position and toward initial contact with said thread, means for rotating said take-up finger faster than said thread is moved immediately from its take-up position by said hook whereby said take-up finger sheds said thread as .said take-up afinger moves from-its take-up position toward initial contact with saidothread, said hook completing swiftly its take-up' of the thread after it is shed by:said take-up finger so as to realignsaid thread for contact i once again by said take-up finger.

17. In a sewing machine, a take-up finger,

means mounting said finger iforrotationabout a fixed axis, said fingerhaving asurface generated by a linemoving inplanes paralleltoits axis of rotation for contacting the thread at anlinitial point in thepath of rotation of said finger, said surface extending into a detent -portion serving as retainer through its positioning relatively to the thread when said finger first contacts the,

thread, said detent portion moving with relation to the thread as said finger takes up -the=thread so as topresent a stripping surface to thethread as said finger rotates from take-upposition to-- ward its pointiof initial contact with the thread.

lib-In sewing machine, a =take-up finger, means i mounting said finger .for rotation about i a fixed axis, saidfinger having asurfacegenerated by a linecmoving :in planes parallel to its axis of rotationlfor contacting the thread at an initial point in the path of rotation of said finger, said surfacelextending into a detent portion serving as a retainer through-its, positioning relatively to the thread Whensaid finger .first contacts the thread said detent portion moving with relation to the thread as said finger takesup the thread so as topresenta stripping surface to the-thread as, said finger rotates beyond take-up position toward its point of initial contact with the thread,land means for rotating said take-up finger faster than said thread is moved from its take-upposition whereby said take-up fingeres tablishes slack between it and=said threadas said take-up fingerimoves beyond its take-up position.

19. In a sewing machine, a take-up finger, means mounting said finger for rotation about a fixed axis, a drive shaft rotatable in. an axis parallel but offset relatively to the axis of rotation of said finger, a crank connection between said drive shaft and thetake upfinger whereby said take-up finger rotates at a varying speed relatively to the speed of saiddrive shaft, said finger having a surface, generated by a line moving in planes parallel to its axis of rotation for contacting the thread at an initial point in the path of rotation of said-finger, said surface extending into a detent portion serving as a retainer through. its positioning relatively to the thread when saidfinger first contactsthe thread, said detentpcrtion moving with relation to the thread as said finger takes up the thread so as to present a stripping surface to the thread as said finger "rotates beyond take-up position toward serving as a retainer through its positioning relatively to the thread when said finger first con-= tacts the thread, said detent portion moving with relation to the thread as said finger takes up the thread so as to present a stripping surface to the thread as said finger rotates beyond take-up position toward its point of initial contact with the thread, and means for rotating said take-up finger faster thansaid-thread is moved imme-' diatelyfrom its take-up position by said hook whereby said take-up finger sheds said thread as said take-up finger moves from its take-up position toward initial contact with said thread.

21. In a sewing machine, a rotary take-up finger having a surface for contacting the thread, a rotary hook for taking up the thread in cooperative relation to said take-up finger, means mounting said take-up finger and hook for rotation on parallel axes vertically spaced from one another, means for holding said thread substantially vertically from a point above the circular path of said detent and leading to said hook, said finger having a surface generated by a line moving in planes parallel to its axis of rotation for contacting the thread at an initial point in the path of rotation of said finger, said surface extending into a detent portion serving as a retainer through its positioning relatively to the thread when said finger first contacts the thread, said portion moving with relation to the thread as said finger takes up the thread so as to present a stripping surface to the thread as said finger rotates from take-up position toward its point of initial contact with the thread, means .for rotating said, take-up, finger faster than said thread is moved immediately from its take-up position by said hook whereby said takeup finger sheds said thread as said take-up finger moves from its take-up position toward initial contact with said thread, and said hook completing swiftly its takeeup of thethread after it is shed by said take-up finger so as to realign said thread for contact once again by said takes up finger.

22. In a sewing machine of the class described, a take-up mechanism comprising a rotating takeup finger, means guiding a thread so that it extends across the rotary path of said take-up finger to be taken up by said finger, a stripping surface formed as a part of said take-up finger for contacting the thread upon rotation of said finger from its first contact with said thread to take-up position, and means for rotating said finger at such speed relatively to the thread immediately beyond take-up position whereby to relieve the pressure of the thread against said finger.

23. In a sewing machine of the class described, a rotary take-up finger, a rotary bobbin hook, means mounting said finger for rotation about a fixed axis parallel to the axis of said bobbin hook, means for guiding a thread so that it lies substantially diametrically of the circular path; of said take-up finger when it issubstantially' fully accepted by said bobbin hook and said take-up finger is about to contact said thread to begin the take-up stroke, said finger having an initial thread contacting surface and a stripping surface to contact the thread as said finger rotates beyond take-up position, and means for ro' tating said finger at such speed relatively to the thread immediately beyond said take-up position means for guiding a thread so that it lies substantially diametrically of the circular path of said take-up finger when it is substantially fully accepted by said bobbin hook and said take-up finger is about to contact said thread to begin the take-up stroke, said finger having an initial thread contacting surface and a stripping surface to contact the thread as said finger rotates beyond take-up position, a drive shaft, means for rotating said bobbin hook in fixed speed relation to said drive shaft, and crank means between said rotary take-up finger and drive shaft for rota'ting said finger at such speed relatively to the thread immediately beyond said takeup position whereby to relieve the pressure of the thread against said finger to facilitate the movement of v the thread off said finger and its acceptance by said bobbin hook.

25. In a sewing machine of the class described,

a rotary take-up finger, a rotary bobbin hook, means mounting said finger and hook for rotation on parallel horizontal axes vertically spaced I with said take-up finger above said bobbin hook,

a needle bar carrying a needle at its lower end,

means mounting said needle bar for vertical reciprocation, a tension member positioned verti cally above said take-up finger, thread guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contactedby said take-up finger it will extend from said tension member substantially diametrically and vertically across the circular path of said take-up finger and toward the needle in substantially a single vertical plane, said finger having an initial thread contacting surface to take-up said thread upon rotationof said finger and a stripping surface to contact the 1 thread as said finger rotates beyond take-up position, and means for rotating said finger at such speed relatively to the thread immediately after completion of the take-up whereby to relieve the pressureof the thread against said fingerto facilitate the movement of the thread off said finger and its acceptance by said bobbin hook.

26. In a sewing machine of the class described, a rotary take-up finger, a rotary bobbin hook,

means mounting said finger and hook for rotation on parallel horizontal axes vertically spaced with said take-up finger above said bobbin hook, I

a needle bar carrying a needle at its lower end, means mounting said needle bar for vertical reciprocation, a tension member positioned vertically above said take-up finger, thread guiding means for guiding said thread so that when it is substantially fully accepted by said bobbin hook and about to be contacted by said take-up finger it will extend-from said tension -memb'er sub-' stantially diametrically and vertically across the circular path of said take-up finger and toward the needle in substantially a single vertical plane, said finger having an initial thread contacting surface to take-up said thread upon rotation of said finger and a stripping surface to contact the thread as said finger rotates beyond take-up position, a drive shaft, means for rotating said bobbin hook in fixed speed relation to said drive shaft, and crank means between said rotary takeup finger and drive shaft for rotating said finger at such speed relatively to the thread immediately after completion of the take-up whereby to relieve the pressure of the thread against said finer to facilitate the movement of the thread off said finger and its acceptance by said bobbin hook.

27. In a sewing machine of the class described, a take-up finger; means for rotating said take-up finger, means guiding a thread so that it extends across the rotary path of said take-up finger to be taken up thereby, said take-up finger having a first surface that first contacts the thread to move it in a take-up direction, said take-up finger having a second surface for contacting the thread after rotation of said take-up finger to take up said thread, and said second surface being shaped to allow endwise movement of said thread off the end of said finger.

28. In a sewing machine of the class described, a rotary bobbin-hook, a rotary take-up finger, means for rotating said take-up finger on an axis parallel to the axis of rotation of said bobbin hook, means for guiding a thread so that it lies substantially diametrically of the circular path of said take-up finger when it is substantially fully accepted by said bobbin hook and said take-up finger is about to contact said thread to begin the take-up stroke, said finger having a surface that first contacts the thread moving it in a take-up direction as the detent rotates, the continued rotation of said finger moving a second surface thereof against said thread to facilitate the movement of the thread off said finger and its acceptance by said bobbin hook.

29. In a, sewing machine of the class described, a rotary bobbin hook, a rotary take-up finger, means for rotating said take-up finger on an axis parallel to the axis of rotation of said bobbin hook, means for guiding a thread so that it lies substantially diametrically of the circular path of said take-up finger when it is substantially fully accepted by said bobbin hook and said takeup finger is about to contact said thread to begin the take-up stroke, said finger having a surface that first contacts the thread moving it in a take-up direction as the detent rotates, the continued rotation of said finger moving a second surface thereof against said thread to facilitate the movement of the thread off said finger and its acceptance by said bobbin hook, a drive shaft, means for rotating said bobbin hook in fixed speed relation to said drive shaft, and crank means between said rotary take-up finger and drive shaft for rotating said finger at such speed relatively to the thread immediately beyond said take-up position whereby to relieve the pressure of the thread against said finger to facilitate the movement of the thread off said finger and its acceptance by said bobbin hook.

30. In a sewing machine of the class described, a head, a take-up disk having take-up means thereon, means mounting said disk for rotation on said head, a cover for said head, means pivoting said cover for movement into and out of covering position, thread guiding means on said head, a second thread guiding means on said cover movable into thread guiding position when said cover moves into covering relation to said head whereby thread is then guided between said head and cover, the thread guiding means of said cover and the thread guiding means on said head coacting to form an eye in effect for the passage of the thread.

31. In a sewing machine of the class described, a head, a take-up disk having take -up means thereon, means mounting said disk for rotation on said head, a cover for said head, means pivoting said cover for movement into and out of covering position, thread guiding means on said head extending transversely thereacross, a second thread guiding means on said cover extending from the inside of said cover toward said disk when said cover is in covering relation to said head, the thread being then guided between said head guide and said cover guide coacting to form an eye in effect for the passage of the thread.

GLEN A. HOLLAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 245,771 Bond Aug. 16, 1881 705,328 Diehl July 27, 1902 2,332,087 Karle Oct. 19, 1943 2,358,495 Graesser Sept. 19, 1944

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