US1813725A

US1813725A - Knotter

Info

Publication number: US1813725A
Application number: US274536A
Authority: US
Inventors: Erskine E Boyce
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-05-02
Filing date: 1928-05-02
Publication date: 1931-07-07
Anticipated expiration: 1948-07-07

Description

M 7, 1931. E. E. BOYCE 1,813,725

KNOTTER Filed May 2, 1928 6 Sheets-Sheet l INVENTQR.

A TTORNEYS.

July], I931. E. E. BOYCE 1,813,725

KNOTTER Filed May 2,' 1928 6 Sheets-Sheet 2 IN V EN TOR.

1 ATTOR 'EYS.

Jufly 7, 1931. E. E. BOYCE 1,813,725

IN V EN TOR.

ATTORNEYS.

E. E. BOYCE July 7, 1931.

KNOTTER Filed May 2, 1928 6 Sheets-Sheet 4 INVENTOR.

BY W ATTORNEYS.

July 7, 1931.

E. E. BOYCE 1,813,725

KNOTTER Filed May 2, 1928' 6 Sheets-Sheet 5 B 27 H A12 4 z i I I INVENTOR. MM 6:- Wk BY ATTOR YS.

E. E. BOYCE July 7, 1931.

KNOTTER 6 Sheets-Sheet 6 INVENTOR. W 8 1 A TTORNEYS.

UNITED STATES PATENT OFFICE .ERSKINE E. BOYCE, OF CORONADO, CALIFORN1A momma J Application filed Kay 2, 1928. Serial No. 274,536.

This invention relates to mechanism for tying a weavers knot, and in the present preferred form takes the form of a hand knotter.

An object of the invention is to provide a simple and efiicient knotter of novel and 50 Fig. 2 is a plan view of the device, with parts of the cover removed to better show.

the mechanism,

Fig. 3 is a front elevation of parts shown in Fig. 2,

Fig. 4 is a view on line 4-4 of Fig. 2, and showing one thread in position,

Fig. 5 is a section taken on line 5-5 of Fig. 2, with the mechanism in its starting position. 1

Fig. 6 is a section taken on line 5-5 of Fig; 2, with the mechanism shown in the position occupied duringthe latter part of its cycle of operation.

Fig. 7 is a section taken on'line 88 of 35 Fig. 2, with the mechanism in the position shown in Fig. 5,

Fig. 8- is a side elevation taken on line 88 of Fig. 2 with the mechanism in the position occupied at the end of the cycle of 4i) operation,

Figs. 9-19, inclusive, are views of parts of the mechanism in varying positions and illustrate the evolution of the knot.

Fig. 20 shows the form of the final knot '45 produced on the device; but in open condition.

Referrin to the drawings, and more particularly to Figs. 1 and 2: the main frame of the device, which supports the operating 50 mechanism, comprises the

side frame plates

1 and 2, which are suitably attached together in spaced relation by the block 3, to which the side plates are fastened by suitable means, and the

pins

4, 5 and 7; to thereby present a substantially rigid supporting frame. A suitable handle 8 is attached to this frame, and cover plates, such as 9 and 10, (Fig. 1) are preferably provided for protecting the mechanism.

The

plates

1 and 2 are provided respectively with opposite slots or

notches

11, 12 and 13, 14, positioned slightly beyond the block 3; and the

portions

15 and 16 separating. the respective slots are brought to a point. The bottom of slot'12 is substantially lower than the bottom of slot 11, (see also Fig. 19) while the bottom of the slot 13 is substantially lower than the bottom of slot 14, and the bottom of the slot 13 is preferably offset as shown in Fig. 1. These slots serve to initially support in extended position,-the strands of thread to be joined; as will be more fully explained hereinafter.

A driving member 17 (see also Figs. 5 and 6), which furnishes the motive means for operating the mechanism, is 'rotatably mounted on the spindle 18 by means of the sleeve 19 formed integral therewith and which sleeve is rigid with the spindle 18. The member 18 carries a gear rack segment 20 adjacent its periphery, and a cam portion having a cam face shoulder 21 and a cam face 22. The lever or trigger 23 is rigidly connected to the member .17 'and provides means for rotating the driving member-17 in an anti-clockwise direction as'viewed in Figs; 5 and 6. The stop 24 (Fig. 2) serves to limit the movement of the trigger to the desired throw,.and a suitable spring (not shown) but preferably coiled about the sleeve 19, is provided for returning the trigger and member 17 to the starting position of Fig. 5.

A rotary driven shaft 25 is suitably journaled in the block?) at its forward end and in bracket 26, attached to plate 1, at its rear end, and has secured thereto a collar 27. A pinion gear 28 is loosely mounted on the shaft 25 in mesh with the rack 20, and is restrained from forward axial movement by the collar 27, and from rearwa axial movement by a pin 29 extend ng fro a d shaft. The gear 28 is provided. with 5 n 30 extending rearwardly to engage th pin 29 for driving said shaft. A' limit stop 31 is mounted on the bracket 26 and extends above pin 30 free from engagement therewith but in the path of movement of pin 29, and is adapted to yieldably limit the rotation of the shaft 25 in a clockwise direction while permitting a greater degree of rotation in an anti-clockwise direction. A helical torque spring 32 surrounds the shaft 25 and is secured at one end to a pin 33 and at the-other end to the collar 27; being so formed that it is wound up upon the rotation of shaft 25 in an anti-clockwise direction, as' viewed from the left of Figures 5 and 6, to thereby return shaft 25 in a clockwise direction.

A tying bill, which will be designated in its entirety as 34, comprises (Figs. 3 and 6) two outer jaws and 36 between whlch is pivoted at 34 a movable jaw 37. The

jaws

35 and 36 are provided with rea'rwardly extending portions which are rigidly attached to the shaft'25, as at the bearing member 38, which is journaled in the block 3; and

the pivotal jaw 37 is provided with a rearwardly extending enlargement 37 whose rear end is seated in a circular bore formed in block 3 eccentric to the shaft 25, the eccentric being so formed that when the tying bill 34* is in the position shown in Figs. 2, 3 and 5, the pivotal jaw 37 will. be in substantial register with the

outside jaws

35 and 36,.thereby assuming a closed position,

and when the bill 34'reacl1es the position shown in Fig.6, thejaws will be separated as shown, and. upon further rotation of the bill 34 in an vanti-clockwise direction the jaws will again be closed, finally-reaching the fully closed osition when the jaw has assumed the posit1on shown in Figs. 15 and 16.

Referring more particularly to Figs. ,2, 4, 5 and 19: a hook 39 is attached to block 3 and rojects forwardly therefrom with the hoo ed end projecting downwardly, and the top of the hook member is provided with a downwardly gradually rounded upper portion. The opening in-the hook is in line with

slots

12 and 14, so that a thread line extended between

slots

12 and 14 will lie in 'a plane passing through the hook.

member 17, the slide plate 40 will be moved 7 forward until the latch 44 passes up onto the cam face 22 (Fig. 6), which is adapted to hold the plate 40 in its forward position until the latch passes over the rear end of the cam face 22; at which time a tension spring 47 ,whose forward end is attached to the plate 40 and whose rear end is attached to the pin 7 will retract the plate 40 to its normal position. "The forward end of the latch 44 is tapered or beveled to permit it to be moved outwardly by the rear side of the adjacent cam projection to thereby permit the driving member 17 to return to its normal position under the influence of the spring 32. The extreme forward end of plate 40 is provided with can u Ward extension 48, the upper end of which terminates in a hook 49 (Figs. 2 and 6). The hook 49 lies closely adjacent the rear side of the hook 39, and when the parts are in the starting position, is in substantial alignment therewith as shown in Fig. 5.

An arm 50 is pivotally attached to the plate 40 as at 51 (Fig. 5) and is provided with a cam slot- 52, through which extends a pin 6 rigidly supported by the block 3; the pivotal attachment 51 acting to impart reciprocal motion to the arm 50 and'the slot 52 in cooperation withthe pin 6 being adapted to impart oscillatory motion to the arm 50; the arm 50 being movable in a slot in the block 3. The forward. end of the arm 50 (Fig. 6) is provided with an offset downwardly extending end 53 terminating in a bifurcation providing a pair of spaced upturned hooks 54, (Figs. 2', 4 and 19) which in the starting position are closely adjacent the front side of the hook 39, but somewhat belowthe hook 39 and in such position that upon their upward movement they will engage a strand-of thread passing between

slots

12 and 14. A supplemental hook 55 (Figs. 2, 6 and 19) is attached to the end of the arm 50 and is offset laterally and positioned somewhat above the hooks 54; the hook 55, the

hooks

39 and 49 and the bottom of slot 12 being in substantial being positioned in a plane above the rear-- wardly extending shank of the bill 34.

It is to be noted in this connection (Figs. 9 and 19) thatv a thread passing through slot 14 and over hook 55, beneath hooks 39 and 49 and through slot 12 adjacent the bottom thereof'will be so supported that a portion

adjacent hooks

39 and 49 will be .attached at their upper rearward end, descup ignated as 60, to the rear plate 2 adjacent the pin 5, (Fig. 3). The inner jaw extends downwardly and terminates in a laterally extending pin which passes through a slotted opening in an operating lever 61, which is pivotally supported on pin 5, and which extends downwardly to the right as viewed in Figs. 5 and 6, then upwardly, terminatingin an upper cam engaging en 62 adapted=to be engaged by. the cam shoulder 21. 'The arm 61 is normally resiliently held in the position shown in Fig. 5 by means of a helical torsion spring 63 mounted on the pin 5 and attached at one end to plate 1 and at the other end to the arm 61. In its normal position the arm holds the jaw 59 separated from the cooperating

jaws

57 and 58 as shown in Fig. 5, thereby presenting the bill 56 in the open position when the device is in its inltialposition; and uponengagement of the upper end 62 of the arm 61 by the cam shoulder 21 the jaws of the bill 56 are closed to thereby cut and clamps, thread extending therebetween. The bill 56 is so proportioned andp'ositioned that the spaced hooks 54 will pass closely adjacent to, and one on each side of the bill 56 .and into ali nment with the openin in the bill.

I: reciprocable slide memier 64 (Figs. 2, 7 and 8) is slidably supported on pins 65 projecting inwardly from plate 2 and passing through a slot 66 formed in the Inember64; and the member 64 is held in place on the pins 65 by means of a-washer plate 67 held in position by suitable heads formed on the in 65. The plate 64 passes through a slot in the block 3. The forward end of the member 64 projects downwardl and again upwardly in general U formatlon, and the -upward outer side of'the U is provided with a recess forming a slight hook 68 which at the start is in such position with respect to the slot'll that a thread passingfrom the slot 11 across to slot 18 will be engaged by the hook 68. A recess 69 is formed in the other side'of the U and is similarly positioned with respect to the bottom of slot 12.

The rear end of the member 64 is provided with a cam pin 70 which is adapted to be engaged by a cam finger 71 carried on cam 72, which is rigidly attached to axle 18,

to thereby provide for moving the slide member 64 to the left as viewed in Figs. 7 and 8, and the in 70 is also in the nth of movement of t e cam projection 3 also formed as an integral part of cam 72 and adapted upon engagement with the pin 70 to move the slide member 64 in the opposite direction.

I A stripper arm 74 is pivotally supported, on a shaft 75, secured to the plate 2, and lies closely adjacent to the side of the slide member 64. The forward end of the stripper 74 extends abruptly downwardly and outwardly and is provided with engaging

hooks

76 and 77; the hook 76 being positioned to engage the thread passing through slot 12 and the hook 77 being positioned to engage the thread passing through slot 11. The rear' end of the stripper 74 is provided with a cam engaging portion 78 adaptedto be engaged by the cam finger 79 formed integral with the cam 72, to thereby provide means for lifting the stripper to the position shown in Fig. 8. attached at one end to the stripper arm '74 and at its other end to the plate 2, to thereby provide'means for returning the stripper arm 74-to the position shown in Fig. 7. The stripper 74 in the starting position passes through a slot formed in the block 3.

' It is to be understood, as will be appreciated by those skilled in the art, that the proper timing of the device will be in accordance with the following description of the operation of the mechanism; and that the exact proportions and suitable formation of the parts will be arranged so that the device will operate in the manner now to be described.

Operation The operative .takes hold ofthe device by inserting the fingers of the left hand through the handle 8, with the opposite end of the device facing in a general direction toward him. and with the thumb of his left hand -in position to engage the trigger lever 23.

thread lying (Fig. 19) over the hook 55 behind the upwardly extending tjp of the bill 34, over the rearwardly extending shank of the bill 34, over the hooks 54, and under the

hooks

39 and 49; the thread being supported by book 55. The other thread B is ex- Asuitable tension spring 80 is tended ,in a similar manner through and between. the

slots

11 and 13, across the shank the various hooks above described, as viewed .in Fig. 19. With the threads thus positioned in the device, the operative engages the trigger lever 23..with the.thumb of his left hand and presses the same downwardly, thereby from the hook 39;

effecting the cycle of operation. now to be more fully described in detail, with particular reference to Figs. 4 and 9 to 17, inclusive.

Upon the initial movement of the trigger 23, the driven member 17 is rotated forwardly .and downwardly, thereby moving the cam shoulder 21 forwardly .and downwardly and through its engagement with the latch 44, sliding the member 40 forwardly, resulting in simultaneously moving the hook. 49

forwardly and in moving the hooks 54' and 55 first upwardly and then forwardly from the position s'hownfin Fig. 4 to the position sho-wnin Figs. 9 and 10. During-this-step the thread -'-A' remains engaged bythev downwardly turned hook 39,'to thereby hold j that portion of the thread against upward and forward movement, while the adjacent portion of the same thread has been engaged by the hook 49 to move it forwardly underneath the thread--B, andsimultaneously thehooks 54 have engaged the thread at a point on the other side of the hook 39 to move it upwardly and across the top of thread 'B to thereby form a loop 81, the bight of which is engaged by the hook 39 and the open. ends of .which extendrespectively on opposite sides of the thread B-. This step also results in the hook 55 carrying the thread A over the top of the tying bill 34, as shown in Figs. 9 and 10, and that portion of the thread engaged by the hooks 54 has been moved forward and into the open jaws of the cutting and clamping bill 56. During this operation the threads are held by the fingers of the'operative under slight tension but permitting the thread A,- to be drawn through the slot 12 to furnish the necessary length for movement of the thread to the position shown in Fig. 10. During the above movement of the driving member 17, the pinion gear 28 has been freely rotated substantially one revolution on its shaft 25 so that the pin 30 carried thereby is moved around to the opposite side of pin 29 without rotating the shaft 25.

The next step consists in giving further downward movement to the member 23 thereby causing pin 30 to engage pin 29 and rotate the shaft 25 and the bill 34 carried thereby to give them an initial rotative movement which carries the bill to the position shown in Fig. 11, during which time the slide member 64 is moved forward by and B against the side "2 as shown in Fig. 11. Upon further rotation of the bill, the forwardly extending open ends of the loop 81 are engaged by the tying bill, and, as the bill moves down to the position shown in Fig. 12, the bight ofthe loop 81 is moved downwardly to thereby'release the same U on further rotation of the tying bill 34, t e loop .81 is moved by the bill34, so that the bight of the loop 81 is inengagement with the adjacent portion of thread -B-, with the result that the loop 82 is formed in thread B-, as shown in Fig. 13, and following this, the tail end of thread -B as it slips over the elbow of the bill 34, is moved over and across the loop 81 to the position shown in Fig. 13. During this operation the jaws of the tying bill 34-have been opened and .are ready to engage the tail end of thread 'B the-open jaws now lying directly beneath the tail of thread -B The cam latch 44' (Fig. 6) has now traveled up toward the end of the cam face.22,and upon further pressure on the trigger 23 passes over 'the end of the cam face to thereby permit the spring 47 to retract plate 40, thereby returning hook 49 and hooks 54 and 55 to their normal position as indicated in Fig. 14. At the same time the cam shoulder 21 comes into engagement with end 62 of arm 61 to thereby close the jaws of the cutting and clamping bill. 56, so that the tail end of thread -A will be held in position shown in Fig. 14. The tying bill 34 now engages the tail of strand B and the

bills

34 and 56 substantially simultaneously cut off and clamp the respective tail ends of strands B and -A,'as shown in Fig. 15. During this operation the pin29 engages the end of spring stop 31, and upon further movement, deflects thesame, thereby allowing the bill to be moved slightly past its initial position: and also during this operation the cam finger 79 (Fig. 8) engages the rear end 78 of the stripper arm 74 to rotate the same upwardly to thereby engage threads A and -B in the

respective notches

76 and 77. Upon completing this movement of the trigger, the stripper arm 74 moves up to the positions shown in Figs. 16 and 17 to thereby pull the more or less completely formed knot 83 off the end of tying bill 34, and pull the tail end of thread --B completely around loop 81 and back under the body of thread B-.

the stop 24, and upon being released by the operative, is returned to its normal osition, by a suitable spring (not shown The spring 32 rotates. the shaft 25 to bringthe tying bill back to its normal position, which is definitely fixed by. engagement of pin 29 with stop 31, which offers sufficient resistance against a force from thisdirection to counteract the unwound, condition of spring 32. The other parts are returned to their respective normal positions by means hereinbefore described. 7

From an understanding of the above description in connection with the drawings, it will be seen that I have provided a novel and useful device having means for supporting two threads in extended position across the device in respective slots 12--14-. and 11--13, and both initially lying on the same side of the tying bill 34, with one of the threads A- releasably held in a position below the adjacent portion of the secondthread B- (Fig. 19) as by the fixed hook 39. The device is further provided with means, the forwardly reciprocating hook 49 and the upwardly and forwardly reciprocating hooks 54, for moving portions of the first thread, which lie adjacent opposite sides of the holding means, respectively above and below and transversely ofthe second thread, to thereby form a loop around the second thread, and for inserting one side of the loop in the normally open jaws of a cutting and clamping device 56; and a means, such as hook 55, is provided for lifting the first thread over and to the opposite side; of the tying bill. Means is PIOVIdGd' for rotating the tying bill to engage the sides of the loop formed in the first thread and for releasing the bight of the same from the holding means, thereby allowing the bight to come into engagement with the adjacent portion of the second thread, which upon further rotation of the tying bill,causes a loop to be formed in the second thread, and .the two threads to be partially coiled around the I tying bill (Fig. 13). The tying bill is provided with cutting and clamping means and the jaws thereof are opened and brought into a position where they engage the tail of the second thread to thereby cut and clamp the same (Figs. 14 and 15.) Means 64 is pro- I vided for clamping the body end of the two threads to the device during the formation of the knot. The device is further providedwith stripping means 74-to engage the body of the two threadsbetween the ,tying bill and the respective points where they are clamped to the device, and the stripping means comes into operation after the tying bill and the other cutting and clamping means have been moved to cut and clamp the two tails of the thread, (Fig. 16) and after the tail of the thread which is held in the cutting billhas been passed partially around tying bill, and thereby pulls the tail ofth *0 g second thread, held in the tying bill, between the two loops and under the second thread,

and thereafter pulls the knot taut Fig. 17).

The various mechanisms of the device are automatically taken back to their respective normal positions after the operative releases the control trigger of the device, and the threads are thereupon released and may be removed from the machine properly joined together by a true wcavers knot. It will therefore be seen that the device provides mechanism for carrying on all operations mechanically and in proper sequence, from the time that the threads are initially inserted into the device until the completion of a true Weavers knot, as clearly illustrated in the drawings.

Having thus described my invention with reference to its preferred form, it will be obvious to those skilled in the art, after understanding my invention, that various changes and modifications may be made therein without departing from the spirit and scope of my invention, and I desire to cover all formsand modifications coming within the language or scope of any one or more of the appended claims.

WVhat I claim is:

1. In a knotter, the combination of guides for looping one thread transversely aroundanother thread, a tying bill positioned to rotate against said loop and arranged to shear and clamp one end of said other thread, and means for looping said cut thread around said first loop.

3. In a knotter, the combination of means for looping one thread transversely around a second thread, a tying bill positioned. to rotate against said loop and arranged to shear and clamp one end of the second thread, and means for looping said second thread around said first loop with the cut end of said second thread passing between said second thread and said first loop, to thereby form a true weavers knot.

4. In a knotter in combination, a tying bill having cutting and. clamping means,

means for supporting a thread across said bill, means for looping a second thread around said first thread with the sides of the loop extending beyond said first thread, means for rotating said bill to engage the sides of said loop and upon further rotation of said' bill to cause the same to cut and clamp the tail of said first thread, and means for cuttin' the tail of said other thread.

Said loop anduponfurther rotation of said bill to cause the same to cut and clamp the tail of said first thread,means for cutting the tail of said second thread, and means for I stripping said partially formed knot from said bill to thereby complete a true weavers knot.

6. In a knotter in combination, a tying bill having cutting and clamping means, means for supporting a thread across sald bill,

"means for looping a second thread around said first thread with the sidesof the loop extending beyond saidfirst thread and for holdingv said loop in position, means for rotating said bill to engage the sides of said loop and upon further rotation of said bill to cause the same to cut and clamp the tail of. said first thread, and means for cutting the tail of said second thread. 7

7, In a knotter in combination, a tying bill having cutting and clamping means, means for supporting a thread across said bill, means for looping a second thread around said first thread with the sides of the loop extending beyond said first thread and for holding said loop in position with the bight of said loop positively held but releasably supported, means for rotating said bill to engage the sides of said loop and upon further rotation of said bill to cause the same to cut and clamp the tail of said first thread, and means for cutting the tail of said second thread.

8. In a knotter in combination,'means for supporting a thread, means for looping a second thread around said first thread and for holding said loop positively supported with the bight thereof releasably held and with the sides of said loop extending beyond said first thread, means for engaging the sides of said loop on the opposite side of the first thread from the bight of the loop and for releasing the bight from its support, and means for cutting and for clamping the tail of said first thread.

9. In a knotter in combination, means for supporting a thread, means for looping a Second thread around said first thread and for holding said loop positively supported with the bight thereof releasably held and with the sides of said loop extending beyond said first thread, means for engaging the sides of said loop and for releasing the bight from its support, means for cutting and for clampin the tail of said first thread, and means or cutting the tail of said second thread. 10. In a knotter in combination, means for supportingia thread, means for looping a second thread around said first thread and for holding said looppositively supported with the bight thereof releasably held and with the sides of said loop extending beyond said first thread means for engaging the sides of saidloop and for releasing the bight from its support, means for clamping the body of both threads, and means for cutting and for clamping the tail of said first thread. 11. In a knotter, in combination, a rotary tying bill, means for supporting two threads on one side of said bill, means for supportingly engaging and releasably holding thefirst of said threads, means for moving portions of said first thread from the opposite sides of said holding means and across said second thread and respectively on opposite sides of the latter to thereby form a loop the bight of which is supported by said holding means and the two sides of which extend beyond said otherlthread and lie in the path of rotation of said bill.

12. In a knotter, incombination, a rotary tying bill, means for supporting twothreads on one side of said bill, means for supportingly engaging and releasably holding one of said threads, mechanism for moving portions of said first thread from the opposite sides of said holding means to thereby form a loop the bight of which is supported by said holding means and the two sides of which extend beyond said second thread and lie in the path of rotation of said bill, said mechanism comprising, means moving upwardly and then transversely to the second thread :to carry one of the portions of said first thread transversely over said second thread, and means moving transversely to saidsecond thread to carry the other of said first thread portions transversely under said second thread.

13. In a knotter, in combination, a'rotary tying bill having means for cutting and clamping the second of two threads, means for supporting said two threads at one side of said bill, means for supportingly engaging and releasably holding one of said threads, mechanism for moving portions of said first thread from the opposite sides of said holding means to thereby form a loop ing means and the two sides of which extend beyond said second thread and lie in the 123' the bight of which is supported by said holdwith one portion of one thread releasably held below the adjacent portion of the second thread, means for moving a portion of said first thread from one side of said relea-sably held portion and transversely beneath said second thread, and means for moving a portion of said first thread from the other side of said releasably held portionover and transversely across said second thread. 1

-15. Ina knotter, in combination, a rotary tying bill, means for holding two threads 'across. said bill on the same side sthereof with one portion of one thread releasably held below the adjacent portion of the sec-' ond thread, means for moving a portion of said first thread'from adjacent one side of said releasably held portion transversely beneath said second thread, and means for moving a portion of said first thread from adjacent the other side ofsaid releasably held portion over and transversely across said second thread and over andto the other side of said tying bill.

16. In a knotter, in combination, a rotary tying bill having cutting and clamping means, means for holding two threads across said bill on the same side thereof with one portion of one thread releasably heldbelow the adjacent portion of the second thread, means for moving a portion of said first thread from adjacent one side of said releasably. held portion transversely beneath said second thread, means for moving a portion of said first thread from adjacent the other sid of said releasably held portion over and transversely across said second thread and to the other side of said'tying bill, and means for cutting the portion of said first thread, which extends transversely over said second thread and for clamping the cut end to hold it in position.

17. In a knotter, in combination, a rotary tying bill having cutting and clamping means, means for holding two threads across said bill on the same side thereof with one portion of one thread releasably held below the adjacent portion of the sec ond threadfin'eans' for moving a portion of said first thread from adjacent one side of said releasably held portion and transversely beneath said second thread, meansfor moving a portion of said first thread from adjacent the other side of said releasablyhcld portion and over and transversely across said second thread and to the other side of said tying bill, means for.cutting the portion of said first thread which ex tends transversely over said second thread and for clamping the cut end to hold it in position, and means including said bill for engaging said transversely extending portions to move them to thereby release said held portion and thereafter to loop said other thread about said first thread and to cut and clamp the tail of said other thread and loop it about said first loop and between said first and second loops.

18. In a knotter, in combination, means for holding two threads in adjacent extended position, and mechanism'for doubling one of said threads over the second to thereby form a loop extendin around and transverse to said other threa said mecha-'- 'nism including a first member to releasably hold the bight of said loop, a reciprocating member on one side of 'said first member, and a reciprocating member on the other side of said first member.

19. In a knotter, in) combination, means.

for holding two threads in adjacent extended position, mechanism for doubling one of said threads over the second to thereby form a loop extending around and transverse to said second thread, and means for cutting the tail of said loop, said mechanism including a first member to releasably hold the bight of said loop, a reciprocating member on one side of said first member, a bifurcated reciprocatin member on the other side ofsaid first mem er for delivering said tail to said cutting means in adjacent supported position.

20. In a knotter, in combination, a rotary .tying bill,' means for holding) two threads in adjacent extended position on thesame side of said bill, mechanism for doubling one of said threads over the second to thereby form a loop extending around and transverse to saidrother thread, means for cutting In testimony whereof I have signed my name to this specification.

ERSKINE E. BOYCE.