US1029335A - Mechanism for supplying thread to bobbins in loopers. - Google Patents

Description

F.BAKBR. I MBGHANISM POR SUPPLYING THREAD T0 BOBBINS IN LOOPERS.

APPLICATION FILED MAY Z5, 1904.

1,029,335. Patented June 11, 1912.

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MBGHANISM FOR SUPPLYING THREAD T0 BOBBINS IN LOOPERS.

APPLIOATION FILED MM5, 1904.

1,029,385, Patented June 11,1912.

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'A'J WHT- E H fi i n? Invenfolf F. BAKER.

MBGHANISM PoR SUPPLYING THREAD To BoBBINs 1N LooPBRs.

APPLICATION FILED MAY 25, 1904.

1,029,335. Patented June 11, 1912.

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MECHANISM POR SUPPLYING THREAD TO BOBBINS IN LOOPERS.

APPLTCATION FILED MAY 25, 1904.

Patented June 11, 1912.

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MECHANISM FOR SUPPLYING THREAD TO BOBBINS IN LOOPERS.

APPLICATION FILED MAY 25, 1904.

1,029,335, Patented June 11,1912.

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UNITED sTATEs ijETENT oEEioE.

FREDERICK BAKER, OF BRIGHTON, NEAR MELBQURNE, VICTORIA, AUSTRALIA.

MECHANISM FOR SUPPLYING THREAD TO BOBBINS IN LOOPERS.

1o all w/Lom it may concern:

Be it known that I, FEEDERTCK BAKER, a subject of the King of Great Britain, residing at Rockview Beach Road, Brighton, near Melbourne, in the State of Victoria, Commonwealth of Australia, builder, have invented certain new and useful Improvements in Mechanism for Supplying Thread to Bobbins in Loopers, of which the following is a specification.

This invention relates to an attachment for sewing machines having revolving hooks and bobbins, the object of the invention being to provide efficient mechanism for winding the thread for such bobbin and for transferring it to the bobbin, wit-hout rcquiring the removal of the latter from the machine.

The invention is hereinafter more fully described and its essential characteristics are set out in the claims.

In these inventions the thread for the supply of the revolving hook is automatically wound into a spool upon a spindle or mandrel while the machine is working and can be slid onto a spindle contained in the revolving hook when it is desired to replenish the supply of thread for the revolving hook.

In order that my invention may be clearly understood I will describe it byreference to the accompanying drawings, in which Figure 1 is an under side plan of a rotary shuttle sewing machine embodying my invention. Fig. 2 is a front elevation of the left hand portion of the lower part o-f said machine. Fig. 2a is a front elevation of the right hand portion of the lower part of the machine,-this figure being a continuation of Fig. 2; Fig. 3 is a back elevation'tpartly in section) showing thc mechanism winding a spool. Fig. 4 is a similar view to Fig. 3, but showing the mechanism pushing' a wound spool into the revolving hook. Fig. 5 is an end elevation'of my invention, being taken from the left hand end of the machine and omitting the supply reel. Fig. G is a vertical transverse section on line 6 6 of Figs. 1 and 3. Figs. 7 and'S are views of a detail of the mechanism. Fig. 9 is a vertical longitudinal section on line 9 9 of Fig. 1. Figs. 10, 11, 1Q and 13 are views illustrating the constructionl of the bobbin case. Fig. 14 is a view of the spindle upon which the thread is wound, also showing Specification of Letters Patent.

Application filed May 25, 1904.

Patented June 11, 1912.

serial No. 209,625.

the bobbin and bobbin case and another portion of the mechanism in central section. Fig. 15 is a side elevation showing the bobbin case open.

The same letters of reference indicate the same or corresponding parts in all the figures.

The thread aV (Figs. 2, 4, 5, (i and 9) for the supply of the bobbin is led from a reel or other holder 4A (supported upon a convenient bracket a) through agroove b in the bed plate B and a hook-shaped guide b2 (fixed to the bed plate) through another hook-shaped guide b3 onto a spindle C. Upon this latter being rotated the thread is wound into a spool.

The spindle C is mounted in bearings c7 in line with the spindle d of the bobbin case D and is loose in said bearings so that it can be slid forward until its forward end is in contact with said spindle d but is drawn back when the thread is to be wound onto it. When the machine is Working the spindle C is rotated by a cog wheel c keyed loosely upon it and engaging with another cog wheel c2 fixed upon a shaft c3. A clutch c* keyed to this shaft c3 engages with a pulley 05 which is mounted loosely upon said shaft 03 and is rotated by an endless belt c passing around the pulley upon the main or fly wheel shaft of the machine when the machine is being worked by hand. When the machine is being worked by treadle or motor` the belt used to drive the machine may be caused to rotate said pulley c5 by contacting with it, as will be readily understood.

E represents a pusher piece mounted upon the spindle C and free to slide'longitudinal thereon, its position being controlled by a fork e projecting into an annular groove in said pusher piece. This fork e is carried by a longitudinally sliding rod e2, which can be moved bv means of a hand lever e3 pivoted upon a bracket c4 and projecting downwards@ that it can be readily moved by the operator, a slot in said hand lever e3 engaging with a pin e projecting from a block e7 fixed to the rod e2. The fork e' is also connected with the lever e3 by a. spring es which serves to draw said fork e and pusher piece E into their normal or windingpositions.

A face plate F, corresponding in diameter with the pusher E, is pivoted at the end of a lever f so that it can be rotated by the spindle C when the end of said spindle projects into a hole in the center of said face plate. This end of the spindle C is slotted, as shown in Fig. 14, so that it engages with a bar f2, which crosses the hole in the center of said face plate F and so causes said Plate to revolve with the spindle C.

Four tapered cuts f3 are arranged tangentiallv around the circumference of the face plate F and serve to engage with the thread when a spool has been transferred to the bobbin and so causing said thread to be led around and wound onto the spindle C when this latter is rotated thereby forming a short, broad spool between the face plate F and the pusher piece E, the diameter of said spool being controlled by a trip lever G described later.

The lever f', upon which the face plate F is pivoted, is fulcrumed upon a pin f2 so that when it is desired to push a wound spool int-o the bobbin case the spindle may be drawn out of engagement with the face plate by a slight movement of the vlever e3, which action allows a spring f5 to draw said face plate F int-o the position shown by dotted lines in Fig. 6.

A V-shaped guide]c7 is arranged to engage with one of a set of pins f* projecting from the rear of the face plate iny order to turn said face plate F into such a position that one of the slots f3 will engage with the thread leading from the revolving hook D to the thread guide b3 when the face plate is drawn forward to enable a fresh spool to be wound. A curved blade or knife f fixed to the end of the lever f is arranged to sever the thread when a fresh spool has been transferred to the bobbin, thereby cutting said spool off' from the supply reel A.

The trip lever Cr is pivoted upon a pin g fixed to one of the `brackets c7, which form the bearings of the spindle C and shaft c3; its lower end being connected by a rod g2 and pin g3 to a block g* which can slide in a recess g5 formed in a bracket g6 while the upper end of said trip lever G bears against the spool of thread which is being wound upon the spindle C. Two pins g3, g7 project from the block g4, the pin Q7 being fitted with arr anti-friction sleeve which bears against the lug h projecting from a sliding rod H, this rod H being connected to a bifurcated lever h2 pivoted upon a bracket h3 and engaging with the clutch c4 so that said lever h2 controls the position of said clutch o". This mechanism allows the spindle C to be rotated by the pulley c5; clutch c", etc..l until a spool of the required size has been wound when the levers Cr will force the pin g7 against the pressure of a spring g8, until said pin is out of engagement with the lug L, thereby freeing the rod H so that a sprin L* can move said rod H and lever h2 and thus throw the clutch c4 out of engagement with the pulley c5, thereby stopping the winding mechanism. The lug h is shaped as shown in Fig. l so that the pin g7 bears againsta flat end for a certain distance and directly the pin gets past this end the projection will act like a wedge, as it is drawn along by the spring h4 and so force said pin g7 outward, thereby drawing the trip lever G away from the spool and pusher piece E so that said trip lever will not catch upon them as the spool is being pushed toward the bobbin.

The member D is similar to an ordinary revolving hook, exceptthat the sleeve or bobbin d3, which rotates upon the spindle ai' contained within the bobbin case has only one flange, the second flange being replaced by a disk d* pivoted upon a cover d5 so thatsaid disk d* can revolve with said sleeve d3. This forms what may be called a one sided bobbin. The cover d5 is pivoted or hinged at de in the base of the horn or projection Z7 which serves to keep the bobbin case from revolving by engaging with the bar or rod b4 fixed to the bed plate B and formed so as to fit over said horn or projection. This cover or door d5 can be opened outwardly against the pressurel of a small spring da by a rod J when it is desired to replenish the supply of thread on the bobbin. The rod J is mounted in bearings so that it can be slid forward until one end presses against a lug Z9 upon the cover or door d5 of the bobbin case so that when said rod J is slid forward it opens said cover or door outwardly, as shown in Fig. 4. The door of the bobbin case can only be opened when the revolving hook is in a certain part of its revolution (coincident with the needle being down) as at the other phases of the revolution the lug df would foul with a part of said revolving hook. The rod J is bent into the shape shown so that it will not touch any part of the winding mechanism.

One of the bearings of the rod J is square so that the rod cannot revolve. The longitudinal position of the rod J is controlled by an arm y" which projects from the rock shaft y'2 and engages with a pin y'3 fixed upon the rod J. The movement of this rock shaft l7'2 is controlled by an arm j* engaging with a block e7 fiXed to the rod e2. This mechanism causes the rod J to open the bobbin case door upon the first part of the movement of the pusher piece E when a wound spool is being transferred to the bobbin. The bobbin case door is closed by the small spring d8 at the end of the return movement of the pusher piece E, etc., (after a spool has been transferred to the bobbin). This is caused by a pin e9 (Fig. 9) projecting from the block e7 engaging with an arm ys projecting from the rock shaft j?, and thereby withdrawing the rod J.

When it is desired to push a wound spool into the bobbin case the operator moves the spindle C rearwardly i. e., away from the bobbin case by pressing the hand lever e3 in the direction of the arrowkin Fig. 3, until the end of the spindle C disengages with the face plate F, which latter will immediately be drawn to one side by the spring f5. The operator then moves the hand lever e3 in the direction of the arrow in Fig. 4, forcing the fork e to slide the pusher piece E together with the wound spool and the spindle C forward until the spindle C is stopped by the end of the sleeve Z3 of the bobbin when the motion of the pusher piece and spool being unchecked will slide the spool off the spindle C onto the sleeve (It. Upon the first part of this forward motion of the pusher piece, etc., the block c7 will engage with the arm j* and cause the arm j of the rock shaft to push the rod J forward so thatl the end thereof will bear against the lug Z9 and thereby open the door d5, of the bobbin case. Then the spool is being pushed into the bobbin c ase the end b5 (Fig. 9) of a lever b", (pivotally mounted on the member 6') engages with and is held back by the stationary bar b4 which is fiXed to the bed plate B. This action causes the lower end bi of this lever to swing forward as its pivot is advanced and pull upon the thread leading from the hook b3 to the spool and force it past a retaining spring which is constructed of a short length of steel wire d10 fixed to the bobbin case. This retaining spring is adapted to close at the end of a slot d in the bobbin case (which is arranged to lead the thread under the tension piece (Z13) by pressing upon the tongue el so that any thread drawn between said retaining spring d10 and tongue d cannot be drawn out. A lug du", projecting from the cover or door d5 of the bobbin case is arranged to cover the retaining spring (11 when the machine is working so that the top thread is not caught by said retaining spring. The operator, having now pushed the wound spool on to the sleeve (Z3 within the bobbin case, returns the hand lever c3 to its normal position, z'. e., to that shown in Fig. 3, thereby drawing the pusher piece E and spindle C away from the member D, this motion accomplishing the following operation. 1st. lt causes the pusher piece E and spindle C to be drawn into their normal positions. 2nd. It causes the pin e" to engage with the arm j5 of the rock shaft j? and thereby witndraws the rod J and allows the spring d to close the bobbin case door nl. 3rd. It causes a pin 010 projecting from the hand lever c3 to contact with one end h5 of a lever h, la and thereby causes the opposite end h6 of said lever to bear against the end of the rod H and thus forces said rod to move the clutch c4 (by means of the lever h2) until said clutch engages with the pulley c5 and the pin 97 of the trip gear has engaged with the lug h upon the rod H. 4th. When the rod H is moved by the lever h5, h, a lug k7 projecting from said rod engages with an arm f pivoted to the bracket e4 and causes the end of this arm to bear against the outer end of the lever f', thereby drawing said lever f into its normal position against the pull of the spring f5 so that the face plate F is drawn forward into its normal or winding position.

The operation is now finished as far as the operator is concerned and the hand lever c is let go. rllhis action allows the small spring es, which bears against the rear end of the spindle C, to press said spindle forward until its forward end projects into the center of the face plate. This last movement draws the fork c forward so that a catch lever (Q9, which is pivoted to one of the brackets c7, can be forced behind the said fork e by a small spring g1 so that the said fork cannot be moved rearwardly. This catch lever gf is connected with the trip lever G by a slotted rod gu pivoted to said lever G, the slot serving to engage with the pin g12 upon one end of the catch lever gg so that said catch lever is drawn out of engagement with the rear side of the fork a when the trip lever is forced outward upon the completion of a spool. ln action, this catch lever prevents the pusher piece E being forced away from the face plate F by the packing or wedging action of the thread as it is wound.

The operation of a sewing machine embodying my invention is as follows: Thread is led from a reel or other holder' A through a groove in the hed plate B and through guides b2, b3 on to the spindle C and (this latter being rotated) is formed into a short broad spool between the pusher piece E and the face plate F. Said pusher piece revolves with the spindle C because a pin projecting from said spindle engages with said pusher piece. )Vlien sufficient thread has been wound to constitute a spool of the required size the lever G will cause the pin gT to disengage with the lug h upon the rod H,thereby allowing the spring h4 to draw the clutch c* away from the pulley 05 and thus stopping the winding mechanism when the machine will be used as an ordinary one until the supply of thread within the member D has been exhausted. When this happens the operator turns the machine until the needle is down and then moves the lever c3 so that the spindle C disengages with the face plate F and allows this latter to be drawn out of the way by its spring f5. The operator then moves the hand lever in the reverse direction, thereby sliding the spool forward and also causing the rod J to open the door d5 of the bobbin case. Upon the finish of this motion the spool is pushed well into the member D and the thread which leads away from said spool, is engaged by the lever 5G and is thereby forced past the retaining catch d10 upon the bobbin case. The lever e3 is now moved into its normal position by the operator. This action returns all the parts to their normal positions and causes the clutch c4 to connect with the drive pulley c and also causes the face plate F to be drawn up into position. This face plate F will engage with the thread as it is drawn up into position, so that the thread will become jammed in one of the slots f3 in said face plate and upon this latter being rotated the thread will be drawn around the curved blade f upon the end of the lever f and so severed, thus cutting olf the spool, now within the bobbin case, from the supply reel and holding the end of the thread to allow an entirely fresh spool to be wound, upon the completion of which the winding gear will be stopped as before. It will be seen, therefore, that the end of the thread leading 'from the supply is hel-d by the gripper to enable the spool to be wound upon the revolving spindle C. When the head F is swung out of the way on the completion of the spool, the end of the thread pulls out of the gripper. Then as the pusher shoves the completed spool into the bobbin, the thread between the spool and the supply comes across a gripper and the knife, and the thread is severed between the gripper and the bobbin, the thread from the supply being` held as before by the gripper for the neXt spool. The length of thread which now projects from the revolving hook is in position to be caught by the top thread in the needle and drawn up under the tension piece Z13 upon the bobbin case, the machine being operated as an ordinary one until the supply of thread upon the bobbin again requires replenishing.

The different operations performed by the mechanism and operator may be summarized as follows i-- spool is wound on tothe spindle and the winding stopped when said spool is of the required size. This spool is pushed into the bobbin case and the revolving hook D threaded. The mechanism is withdrawn into its normal or winding position and the spool cut from the supply reel and the clutch mechanism is connected so that a fresh spool may be wound.

Having thus described my invention, what I claim is :Y

1. In a sewing machine, the combination of a case for a rotary bobbin, a rotary bobbin located in the case, a rotary spindle, means for winding thread upon the spindle, and means for transferring it to the bobbin in the case.

2. In a sewing machine, the combination of a case for a rotary bobbin, a rotary bobbin located in the case, a spindle alined therewith, means for winding thread upon the spindle, means for shoving such thread lengthwise of the spindle onto the bobbin in the case.

3. In a sewing machine, the combination of a rotary bobbin having a central spindle, a spindle alined therewith, means for winding thread in a coil on the last named spindle, means for bringing the two spindles substantially into engagement, and means for shoving the thread from the spindle on which it is wound onto the spindle of the bobbin.

4. In a sewing machine, the combination of a rotary bobbin, a spool winding spindle mounted in bearings in line with the bobbin, a removable face plate for such spindle, and means for transferring the spool from the spindle to the bobbin.

5. In a sewing machine, the combination, with a revolving hook, a bobbin mounted in said hook, a spool winding spindle, a lever, a movable face plate revolubly mounted on the lever and adapted to form a wall for a spool being wound on the spindle, another face plate forming the other wall for such spool, and means for transferring the spool from the spindle to the bobbin.

6. In a sewing machine, in combination, a rotary bobbin, a spool winding spindle mounted in bearings in line with the axis of the rotary bobbin, a removable and revoluble face plate adapted to stand at the end of the spindle, means for removing such face plate, and means for transferring the wound spool from the spindle to the bobbin.

7. In a sewing machine, the combination, with a revolving hook rotary spindle, of a removable and revoluble face plate coperating therewith and having one face against which the spool wound on the spindle is formed, said face plate being formed with tapered tangential cuts, means for guiding the thread to the spindle, means for rotating` the spindle, a rotary bobbin, and means for transferring the spool from the spindle to the bobbin.

8. In a sewing machine, the combination, with a revoluble spindle. of a removable and revoluble face plate fitting against one end of the spindle and having projecting pins on its rear face, a guide with which said pins may cooperate to properly hold the face plate when stationary.

9. In a sewing machine, the combination, with a rotary winding spindle, of a removable and revoluble face plate adapted to form one wall against which the spool being wound on the spindle is formed, a cutting plate carried by the support for the face plate.

10. In a sewing machine, the combination of a rotary spindle, a head slidable thereon, a removable face plate, said head and face plate and spindle forming a guide on which the thread may be wound, means for removing said face plate, means for causing the head to move along the spindle to shove the wound spool off of the spindle, and a bobbin case adapted to carry a rotary bobbin having a central spindle in alinement with the winding spindle, whereby the wound thread may be shoved from the winding spindle onto the bobbin spindle.

11. In a sewing machine, the combination, with a revolving hook, a bobbin case adapted to carry a bobbin having a central spindle, of a rotary winding spindle in line with the bobbin spindle, mechanism for winding thread onto the winding spindle mechanism for then bringing the Winding spindle into substantial engagement with the bobbin spindle, and mechanism for then shoving the wound thread lengthwise of the winding spindle onto the bobbin spindle.

1Q. In a sewing machine, the combination, with a rotary bobbin having a central spindle, a rotary winding spindle, means for holding such spindles in axial alinement, a pair of heads coperating with the winding spindle and providing a space between which the spool may be wound, means for removing the head between the spindle and bobbin, and means for moving the other head lengthwise of the spindle to shove the spool onto the bobbin.

13. In a sewing machine, the combination, with a rotary bobbin, means for carrying it, a rotary spindle, a pair of heads cooperating therewith and providing a space in which the thread may be wound around the spindle, means for removing the head which is between the spindle and bobbin, means for shoving the other head lengthwise of the spindle toward the bobbin, and a spring adapted to hold the spindle in proximity to the bobbin as the thread is being transterred.

14. In a sewing machine, the combination, with means for winding a spool of thread` a rotary bobbin, means for shifting said spool onto the bobbin, means for controlling the shifting, and a trip lever actuated by the thread on the spool and controlling the last mentioned means.

15. In a sewing machine, the combination of a revoluble winding spindle, a lever, a face plate rotatably mounted on the lever, a spring for withdrawing such lever, means for moving it to bring the face plate into position opposite the end of the spindle, a bobbin, and means for removing the wound spool from the spindle when the face plate is away from the spindle and depositing it onto the bobbin.

1G. In a sewing machine, the combination of a revolving hook, a rotary bobbin, mechanism for winding a coil of thread, mechanism for depositing it on the bobbin, and

mechanism for threading the revolving hook.

17. In a sewing machine, the combination of a bobbin case having a door, a bobbin mounted within the bobbin case, mechanism for winding thread for the bobbin, mechanism for inserting the same into the bobbin case, and mechanism for automatically opening the door of the bobbin case just preceding the insertion of the thread thereinto.

18. The combination in a sewing machine, of a revolving hook, a bobbin case about which the revolving hook is adapted to rotate, a bobbin within said bobbin case, mechanism for winding thread to form a spool, and mechanism for transferring such spool onto the bobbin.

19. In a sewing machine, the combination of a rotary bobbin, a spindle whose axis alines with the bobbin, mechanism for winding thread into a spool on said spindle, and mechanism for shoving such spool lengthwise of the spindle onto the bobbin.

20. In a sewing machine, the combination of a bobbin case having a cover or door hinged to it, a one-sided bobbin within such case, mechanism for winding a spool of thread, and mechanism for opening such door and inserting said spool.

21. In a sewing machine, the combination of a bobbin having a central spindle and one disk-like flange extending therefrom, mechanism for winding a coil of thread, and mechanism for shoving such coil bodily onto the spindle of the bobbin.

22. In a sewing machine, the combination of a bobbin case having an axial spindle, a door hinged to said case, a spring tending to close said door, mechanism for winding thread into a spool, and mechanism for opening said door and inserting said spool around the spindle of the bobbin case.

23. In a sewing machine, the combination of a rotary bobbin case having an axial spindle, a bobbin within said case having a sleeve seating on said spindle and a disk-like flange at the rear end of said sleeve, a door pivoted to the bobbin case, mechanism for winding thread into a spool, mechanism for opening said door, mechanism for bringing the wound spool into juXta-position to the bobbin sleeve, and means for shoving said spool lengthwise onto said sleeve.

24. In a sewing machine, the combination of a bobbin case having a central spindle, a bobbin having a sleeve on said spindle and a disk-like flange at its rear end, a winding spindle alined with said sleeve, means for winding thread into a spool around said spindle, a head slidable on said spindle, and means for moving said head to shove the wound spool onto the sleeve of the bobbin.

25. In a sewing machine, the combination of a bobbin means for winding thread into a spool to be transferred thereto, a trip lever adapted to bear against layers of thread on the spool, a clutch for controlling the winding mechanism, an operating connection between the trip lever and the clutch whereby the trip lever may throw the clutch,

.and mechanism whereby the trip lever is thrown out of the path of the spool when it operates the clutch.

26. In a sewing machine, the combination of mechanism for winding a thread into a spool, a rotary bobbin, mechanism for transferring the spool onto the bobbin, and mechanism for severing the thread between the spool and the supply thereof.

27. In a sewing machine, the combination of mechanism for winding a thread into a spool, a bobbin, mechanism for transferring the spool onto the bobbin, mechanism for severing the thread between the spool and the supply thereof, and means for automatically grasping and holding the end of the thread after severance adjacent to the winding mechanism for subsequent winding.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses this tenth day of May 1,904.

FREDERICK BAKER.

Witnesses:

T. SELBY VVARDLE, WALTER J. SKERTEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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