US1714946A - Knotter - Google Patents

Description

May 28, 1929. B. E) BY@ 1,714,946

KNOTTER Filed June 22( 1928 2 sheets-sheet 2 INVENTOR BY m24 L i ,y A'rroRNEY Patented May 28, 19.29.

narran .rar

entre BRETTON E. BYRD, OF GASTONIA, NORTH kCAIROINA,l ASSGNOR'ITO MILL DEVICES COIVIPANY, INC., OE? GASTCNIA, NORTH CAROLNA, A CORPORATION OF NORTH CAROLNA.

Application led .Tune 22,

This invention is an improvement in knotters et the type shown and described in Patents Nos. 1,572,182, February 9, 1926, and 1,599,160, September 7, 1926, and more particularly in a knetter 'or'forining What may be distinguished as a hybrid knot.

ln the construction et the patents referred to, the knetter is designed to tie a Weaver" knot, that is, a small flat knot which Will be leastnoticeable in the Woven fabric.

ln tying threads, such as voiles, silks and rayon, wherein the surface coefficient et lriction is relativel small, and the fibers are relatively stiff, tie ends of the threads at the knot tend to back out, thus to loosen the knot. Y L

1n application Serial No. 253,595, filed Feb. 11, 1928, a construction is shown especially adapted for tying this character et silks, wherein an additional loop is made at the cut ends et the threads et one thread about the other, to provide thus a stay or scotch for the said ends. l

In this construction, an additional turn et the threads about eachother is imparted at one side et the knetter, but the positioning of the threads, the cutting and clamping et one thread by the bill, and the use of an auxiliary shear to sever the remaining thread is substantially the same as in the patents Virstmentioned. Y

One of the primary objects of the present invention is the provision of mechanism for tying a knot, Whichinay be described as a hybrid knot, having incorporated therein a scotch or stay. l 1

Another object is the provision in a knetter of this character, of thread positioning .means at one side of the bill, for Winding the threads about each other more than a turn, and for positioning the threads at the end of the Winding operation adjacent each other instead of spaced apart laterally as in the usual construction.v

Another object is the provision of mechanism for so positioning the threads at onek side et the bill, as to cause the bill tesiinultaneously clamp and cut both ends et' the thread, thus enabling the auxiliary shear to be dispensed with.

With these and other objects in view the invention consistsrin the construction and novel combination-of parts fully ldescribed hereinafter, illustrated in the accompanyingdrawings, and pointed ont in the claims ap- Y KNOTTER.

1328. Serial No. 287,388.

pended hereto, it being `understood that va- 1 is a side vienl et the improvedv knetter.

Fig. .2 isa similar View looking at the other side. Fig. 3 is a plan View. Figt is a longitudinal section. Fig. 5 is asection on the line 5 5 of F ig. 4. F ig. 6 is a perspective view et the thread positioning` means at the commencement et the operation.

Figs. 7 and 9 are similar views showing other steps in the operation et tying.

F ig. 8 is a plan view of the two threads in the position of Fig. 7.

Fig. 10 is a plan View of the completed knot prior to tightening.

ln the present embodiment et the invention theiniproved knetter comprises a suitable trame indicated .generally at 1, having a handle 2 and including an operatinglever 3, intended te bey operated by the thumb.

rlhe tying bill indicated generally at't, is et usual construction, comprising` tWo fixed and a movable blade, which is operated dur- K ing the rotationot the bill to cut and clamp one of t-he threads. Y

'lhe bill is rotated by meansof the lever 8, the said lever having .a fork 5, engaging a helical portion 6 of the bill, thereby to rotate the bill when t-he lever is operated. All et these parts are similar to the parts shown in the patents referred to.

Mechanism is'provided at each side of the bill for supporting a pair et threads to be knotted in proper relation Withrespect to the bill. Such mechanism includes pairs of seats 7--8 and 91-10 respectively, in the side plates of the frame, and When the threads are laid in the seats in parallel relation, as shown more clearlyin Fig. 6, one Will be on the inner side et the bill, and the other on the outer side, that is, the clamping jaws will extend between the threadswvhich are indicated at 11 and 12, the threadll being shown as black, for enabling distinction of the threads. l

Mechanism4 is .also providedl for moving the outermost thread 1-1,toy the inner side of the innermost thread 12, prior yto the op-` eration of the bill. The thread 11 is moved abo-ve the thread 12 while at the same time the thread 12 is moved outwardly below the thread 11, so that the threads are crossed on each side of the bill. The moving mechanism includes rockers 13 and 14, respectively, which are pivoted to the side plates of the frame 1. v

Each rocker has a pair of seats 15 and 16 for the rocker 13, and 17 and 18 for the rocker 14. Normally the rockers stand so that the seats 7-15, 8-16, 9-17, and 1018, respeotively, register, this position being shown in F 6. A slide 19 is mounted on the side of the frame 1 adjacent the rocker 13, and this slide has a notch 20 in its outer end, which engagesl the innermost thread 12 at that side in the seats 3-16, and moves the thread out-wardly in the crossing operation.

A gear sector 21 is pivoted to the frame at 22, and the sector engages a pinion 23 on a stub shaft 24, to which the rocker 14 is rigidly connected to rotate with the shaft. The shaft is journaled in the'adjacent side plate of the frame, and in a shield 25, which normally covers and hides the sector, the shield being clearly shown in Fig. 1. The slide 19, previously mentioned, is pivoted to the rocker 13 at its outer end as indicated at 26,' so that when the slide moves outward to move the thread 12, it operates the rocker 13, and thel sector and the slide are operated inrunison by means of a cam 27, forming a part of the lever 3 before mentioned. rihe l slideis connected by means of a cross shaft 28 with a slide 29 o n the vouter face of the opposite side of the frame, and the shaft 23 eX- tends through a slot 30 in the sector.

The arrangement is suoli that when the shaft 28 is moved longitudinally of the bill toward the operative end thereof, thc slides 19 and 29 move therewith, and the slot 30 is .so arranged in the sector, that this outward movement of the shaft swings the sector downward, causing it to rotate the pinion 23.

Referring to Figs. 6 to 9 inclusive, it will be. noticed that the seat 17 of the rocker 14 is relatively deep, extending beneath the shaft 24, and it will be apparent that the sector imparts an amplifiedmovement to the rocker 14. The relative proportion of the parts is such that the rocker is rotated through substantially two complete rotations, while the rocker 13 is swinging from the position of Fig. 6 to that of Fig.v 9. Thus the threads 11 and 12 will be wrapped around each other as shown in Fig. 7, during the operation of the rockers, and before the bill commences the actual operation of tying. It is the amplified movement of the rocker which causes the formation of the character of knot shown in Fig. 10. 1 l

y The knotis stripped and strained, by a stripping arm 31, which is substantially of the charactervshown in Patent No. 1,57 2,182.

This stripper is a lever, pivoted at 32 within the frame, and having a pair of arms 33 and 34, between which one of the fork arms 5 of the lever 3 moves. The lower edGe ofthe arm 33 is concentric with the pivotal connection 35 of the lever, so that the lever31 is not effective during the forward movement of the fork arm to operate the tying bill until the fork arm nears the end of its forward movelping over the stripper.

The construction so'far described, with the exception of the seat 17 in the rocker 14, is the same as that shown and described in'my application Serial No. 253,595, iiled February 11, 1928. The seat 17, however, in the present construction is deepened,V so that when the parts are in the normal position of Fig. 6, the bottom of the seat 17 is well below the seat 9. Vvhen'the rocker commences its amplified movement in the early part of the movement the thread 11 is not engaged by the seat, but at the end of the movement it is carried a less distance tran in the construc- `tion of the above mentioned application.

Because of this the thread 11 is wrapped about the thread 12l more than a' complete turn, and in fact about a turn and a half, and the threadsv are positioned after the winding operation is in position to be simultaneously clamped and cut by the bill. Thus the auX- iliary 'cutterr usually used for cutting the thread 11 may be dispensed with, while at the same timeaV firmnonslippa'ble knot is produced. The knot is a modification of the gianny,7 but the additional turn shown in Fig. 10 makes the knot nonslippable, without at the same time 'giving any appreciable vincrease in size above the usual weavers knot.

The particular.arrangement enables the movement of the one thread with the rocker having amplified movement to be limit-ed to less than the full or complete movement of the rocker, while at the saine-time the thread is free to disengage from the rocker when engaged by the tying bill. It is apparent that in order to enable free disengagement with amplified movement, the movement of the rocker must be one or more complete turns unless special mechanism is provided for releasing the thread before the completion of the last turn, and a deepened notch serves this purpose.

What is claimed as new is 1. Mechanism for tying a hybrid knot, including a rotary tying bill, means moving with the threads to cross them on one side of the bill, andv means moving with the threads on the other side to Wind them about each other through a turn and one-half for the purpose speciiied.

2. In a knotter including a. rotary tying bill, means moving with the threads to move them into crossed relation on opposite sides oi: the bill, means to operate the thread moving means and the bill in sequence, mecha-` nism to impart an amplified movement to one ot the thread moving means, the thread moving means including rockers, each having seats for receiving the threads in spaced relation, the seat in the rocker having amplified movementof a depth such that it does not engage the thread until a selected part of its movement has taken place.

3. In a device of the class described, a-

tying bill, means to position apair oit' threads for knotting by the bill, including` means moving with the threads at one side ot the bill in opposite directions to cross said threads, and means at the other side and mov* y l ing with the threads to rotate them about each other for substantially a turn and onehalt for the purpose specified. Y

4. In a device of. the class described, a tying bill, means to position a pair of threads for knotting Vby the bill, including means at one side of the bill moving With the threads to cross said threads, means at the other side and moving With the threads to Wind them about each other for the purpose specied, the threading moving means including rockers, and means in connection With the last named means for limiting the movement of the thread therewith to less than the complete `movement thereof.

- 5. 'A knotter including a rotary tying bill, means for crossing the threads onl one side of the bill, means for Winding the threads about each other on the other side of the bill, and for positioning them to be simultaneously clamped and cut by the bill during its rotative movement, and means for operating the` bill and the crossing and Winding means.

G. A knetter including a rotary tying bill, means for crossing the threads on one side of the bill, means for Winding the threads about each other on the other side of the bill, and for positioning them to be simultaneously clamped andcut by the bill during its rotative movement, means for operating the bill and the crossing and Winding means, and meansyfor straining the knot and stripping it from the bill, operated by the operating.

means. v

7. A knetter including a rotary tying bill, means for crossing the threads on each side ot' the bill, means in connection with one of said means for imparting an amplified movement thereto, thereby to Wind the threads about eachother and position them to be simultaneously clamped and cut by the tying bill in its rotative movement, and means for operating the bill and the crossing means.

Signed at Gastonia, in the county of Gaston and State of North Carolina, this 19th day of J une, A. D. 1928.-

BRITTON E.' BYRD.

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