US1974846A - Weaver's knotter - Google Patents

Description

Sept. 25, 1934. N. cooK wEAvERs KNOTTER Filed oct. 18, 1955 2 sheets-shewh 1 Fig. 1.

/NVEA/TOR Y NORM/1N Co 0K of Sept. 25,1934. N COOK l v 1,974,846

' WEAVERS KNOTTER Filed oct. 1s, 1955 2 sheets-sheet 2 `ATTORNEY 110i apparatus.

` f .1re srATes; PATENT. FFICE 1,974,846` l WEAvEns KNOTTER Norman 4Cook, Manchester, England' .Application october 18,1933, seriarNa. 694,029

v. .in Great Britain October 29, 1932 12 claims; (o1. 289-3) i This invention has referenceft'o apparatus for tying weavers knots, `and commonlyreferred to ash "weavers knottersf and relates'more particularly'lto knottersotthe kind in which aknotting- .V biil rotates `between two sides ofiv the apparatus across whiroh thestrands to be knotted are laid and -which after ther-knot'is tiedfare drawn clear cfa-nd carried away from the knotting billby anwmltwardiy` swinging action" of onelside ofthe In knotte'rsrof` the kind referred toit has hitherto been necessary fruthe operatorl to check slightly by holding one or morehoflthe strands during therknotting operation, and while this in '1.5i the .ordinary circumstances does not present any serious objection; asl the operator merely retains holdtoffthe strandslaiter layinglthem Vacross the `lmotterl-it is `convenient for somerpurposes to be ablev to operate thec knetter without retaining hold-.lofl the strands, and this` invention has for its object to provide an` improved knotter of the swinging-arm type referred to,lwhereby the need fori holdingfthe strands is overcomeand which, among yother features provides, owing to the 255; automatic holding "of the strands more even ends tothe `knot than is` usually obtained whena.stranduoristrandsiis orare held by the user.

According' to` this `invention i apparatus of the kind referred to for tying weavers knots is pro! vided withxtwo `slots .on Teach side of the apparatus,v each slot having -coeoperating With it a clipping or holding 4member working in conjunc` tion with the knotting bill, whereby the strands are held and` released asf required duringwthe knotting operation thus `avoiding the need for the operatortohold the strands."

The invention 'is more particularly` sett `forth with reference. tothe'aceompanying drawings wherein` various views of a weavers knetter ornadeiaccordingwto the: invention andthe sequence'of `the knotting. operations are shown andi.

in which` Y Fig. 1 is a plan of a knetter', the swinging `arm being atvthe top; i

45 Fig; 2":is7aside elevation looking towarduthe-` riedina supporti 10 whicl'lis shown brokerr 551,1 away;""but which has' -a strap" or like-handle is a side 1 elevation ofr the swinging arrn` s a partial side elevation `similar to'lig.`

mounted upon it through which` the operators handiis passed so that the knetter can be carried-on the hand in .such a manner as to leave the ngers clear and Ato piace the trigger 11A conveniently in position lfor operation by the thumb, the support handle and trigger Vbeing` arranged conveniently for usel on either hand,V though the knotter illustrated by the drawings is-designed for the left hand.

Mounted on the support 10-and secured there-` on by a screw and nut -12 are two main frame members 13 between which and on a part of the serew 12 designed to-form a pivot a quadrant 14` is mounted. The two frame members 13 diverge as they rise, as shown in Fig, tand at the top are shaped and extended tofo'rm a frame l5 on1 which various partsof the knotter to be described in greater detail later on, are mounted.

The quadrant 14 from which the trigger 11 pro jects, and by which it is operated, has teeth 16 along its edge which engage with a worm 17 on' a knotting-bill spindle 18 which is mounted toI rotate in the back and front members ofthe frame 15. YAt the-frontof the knotting bill spindle 18 is the knotting-bill which is opened and closed when the spindle islrotated bycontact and non-contact of `thelroot- 19 of the movable member with the eccentrically arrangedopening in a front crossl extending arm 20 of the frame 15.

A spring 21 anchored at the top against one framememher 13 and given several turns round thescrew 12 presses against the underside of theA trigger 11 and thus tends `to keep it and hence the quadrant also inthe position in which the whoieA apparatus is ready for use, it loeingunderstoodV that the whole of the knotting mechanism is worked by the trigger. v

rejecting below the pivot Screw 12 is a portionof the quadrant which has a slot 22 cut in it', the@ shape of which is shown in Fig. 2 `and also on the quadrant and near the back extremity of thisslot` 22 is a horn 23 whichprojects across the apparatus-toward the swinging-arm side.

` Pivotally mounted on a` slight rearward extension of the frame member 13 on the side opposite to the swinging-arm is a bell crank lever, one arm 2440i which has aro1ler25 mounted on its inside'face whichlies in the slot 22, and the'other arm 26 of which engages afork 27 projecting downwardly from a sliding arm 28 mounted to slide on securing screws 29whichsecure a nxed side member 30to the rarne- 15 andbetween which members the sliding arml28 is reciprocated The xedside member BOhas near its front end Y a front `slot 31 and a back s1otf32and the sliding! est arm 28 also has front and back slots 33 and 34 respectively, and between these slots 33 and 34 an arm 35 rises from the member 28 and crosses in a curve over and behind the knotting-bill toward the swinging arm 36 which is pivoted at 37 at the rear of the frame to swing outwardly, a spring 38 being mounted on the pivot 37 to urge the swinging arm into the normal closed position.

The swinging arm 3S, is turned across the front of the knotting bill and has upon it a hood 39 which passes over the knotting bill, and it also has a slot 40 in which a cutting member 41 works and which is actuated by an arm 42 passing through a slot in the front portion of the swinging arm. This arm is pivoted at 43 under` the swinging arm so as to swing horizontally and actuates the cutter and the actuation is eiected by turning upward the inner end of the arm 42 at 44 where it is engaged by a co-operating portion of the frame and is held when the swinging arm is moved outward.

On the inside oi the swinging arm is a slider 45 which has an upwardly projecting portion 46 slightly bent round at the iront so that between it and the front portion of the swinging arm a slot 47 is formed.

Projecting upwardly from the screw 43 to which it is conveniently anchored is a spring 48 which though on the swinging arm will be referred to for convenience as a fixed spring, and behind this, and carried on the slider 45 is another spring 49. A slot 50 is thus formed between the two springs and when the slide is moved forward the respective slots 47 and 50 will be closed, and anything lying therein will be nipped.

Alternatively, and as shown in Fig. 6 instead of the springs 48 and 49 on the inside the slider 45 is provided with an upstanding portion which is slotted at 50 to correspond with the slot 50 between the springs 48 and 49 and this slot which is conveniently narrower than that formed between the springs is suiilcient to hold the thread without the need for nipping between springs. Either arrangement can be used though the former is preferable when dealing with hard or springing yarns. The slider 45 is not only adapted to slide, but

at its rear end it is adapted also to move slightlyl up and down the up and down movement at the rear being in fact the movement which pushes it forward. This movement is therefore effected through the co-operation ci a pin 51 projecting from a downwardly extending part 52 of the slider 45 which pin projects into the path of a pivoted arm 53, which by means of a roller pin 54 pro-.

jecting through an opening in the adjacent frame member 13 comes into contact with a cam facel quadrant when the horn is brought up near the end of the operative movement of the quadrant, and as the horn 23 and the part it engages are shaped to co-operate the result of their engagement is to swing the swinging arm outward on its pivot 37.

In operating the knetter, it is taken on the left hand, the knetter illustrated being designed for left hand, which however does not aifect the construction or operation, and after the left thumb has been placed on'the trigger, the two` strands to be knotted are laid across the device.

One strand, i. e. the back strand is passed into the slot 50, across the device behind the arm 35, down the slots 34 and 32 of the slider and xed side arm respectively. The other strand i. e. the front strand is passed into the slot 47 and into the slots 33 and 31 in the slider and xed arm respectively, and as it is pulled down into these two slots it is carried over the hood 39 and thus passes underneath the hood and across the knotting bill spindle just behind the bill and in passing from this position to the slots 33 and 31 it is guided into the slot of the cutter at the edge of the inwardhT turned front of the swinging arm.

When the two strands are placed in this position they will both lie at the bottom of the slots and also will both lie across the knotting bill spindle uncrossed, the front strand lying nearer to the knotting bill than the back strand. When in this position they can safely be released.

It will be noticed by reference to Fig. 2 that the slots on the slider and on the fixed arm do not coincide and consequently as the strands are drawn through the slots in the slider and the xed side, they are passed through on an incline as considered in plan, and are not drawn straight across as they are in the open slots on the swinging arm. By this angular disposition there is a certain degree of friction or drag applied to the strands which tends to hold them against sliding or slipping. As soon as the trigger is depressed, the knotting bill begins to rotate in a counter clockwise direction and simultaneously 'j the bell-crank lever arm 26 engaging the fork 27 moves the slider forward. Also at the same time the lever 53 is lifted and presses the pin 51 upward which, through the mechanism already described moves the slider 45 on the inside of the swinging arm and the spring 49 (where this arrangement is used) is pressed against the spring 48 thus nipping the strand lying in the slot 50 and the other strand in the slot 47 is nipped between the projecting portion 46 of the slider and the front face of the swinging arm. Where the springs 48 and 49 are not used, the yarn in the slot 50 is heldsuinciently by its friction in the slot.

The strands at the swinging arm side are thus nipped as those at the opposite side have the tension on them slightly relaxed as the slots on that side are aligned.

During the tying of the knot, the nipping pressure on the yarn at the swinging arm side is not relaxed, but at the opposite side the pressure is first relaxed by the slider being moved forward and is then re-applied as the slider is moved backward, and is tightened still more as the slider is moved back to a further extent which -g vmovement as will be understood is governed by the shape of the slot 22.

Finally, as the tying is completed continued downward movement of the trigger brings the horn 23 into co-operation with the downwardly extending part 52 of the slider 45, and so forces the swinging arm outwardly, the arm drawing the knot off the knotting bill, and the outward movement of the arm actuating the cutter at the front of the swinging arm and severing the strand which passes through it. The loose end caused by this cutting is the same length orapproximately the same length as the end left by the cutting operation of the knotting-bill.

The first complete rotation of the knottingward and from the other side of the knetter,

bill forms a4 loop ofithe front strand round the bill, and the back strand` which is movedforward by the [slide-r on the iixed. side is pulled across the 'knetting` Ibill spindle into a position just behind the bill. The second complete rotation gives a second loop te the front strand: and a first loop to the back strand and as the bill comes up itis openedrandcuts the back strand on the xedside, thus leaving only the front strand passing through the bill cutter and front slot on the xed side. i

As this cutting takes place the swinging arm begins to `open )and as` Ait opens it draws the looped strandsyoff the bill, which however 'continues te hold: the cut strand over whichV the others are drawnand asthe .swinging arm moves further, out the front strand on the fixed side is cut by the cutter on the front thus releasing it from the iixedside and the two knotted strands are held in the slots of the swinging-arrn from which they are removed as the clipping members release their hold whenV the pressure is relaxed. i It will thus beiseen that the various strands are held as and whenrequired te conform with the movements ofV the Yknetting bill and are also out as` and when required during the progress of the` knetting` operation.

l WhatAI claim as my invention and desire to secure byLetters Patent is:-

1. In a weavers knetter, the combination of a frame, a support for said frame, a rotatable knetting bill mounted in said frame, an actuating element for revolving said bill, an arm at one side of the knetter pivotally mounted on said frame for lateral swinging movement tomeans at opposite sides of said bill for guiding and gripping the threads to be tied together, and mechanism for operating said means at both sides of said bill independently of each other and in timed relationship to the movements of said bill.

2. In a weavers knetter, the combination of a frame, a support for said frame, a rotatable knetting bill mounted in said frame, an actuating element ier revolving said bill, an arm at one side er the knetter pivotally mounted on said frame for lateral swinging movement toward and from the other side of the knetter, means at opposite sides of said bill for guiding and gripping the threads te be tied together, and connections arranged to be operated by said actuating element for operating said means te grip the threads at one side of said bill during the rst part of the rotation of the bill and to release one of them at a predetermined but later peint in the rotation of the bill.

3. In a weavers knetter, the combination of a frame, a support for said frame, a rotatable U knetting bill mounted in said frame, an actuating element for revolving said bill, an arm at one side of the knetter pivotally mounted on said frame for lateral swinging movement toward and from the other side of the knetter, means at one side of said bill for gripping both threads but holding them spaced apart, means at the other side of said bill for gripping one of said threads, and connections between both of said means and said element for utilizing the movement of said element to cause said means to grip the threads and te release them at predetermined points during the knetting operation.

4. In a weavers knetter, the combination of a frame, a support for said frame, a rotatable knetting bill mounted in said frame, an actuating element for revolving` said bill, an armfat one side of Ithe knetter pivotally mounted on said frameV for lateral swinging movement tewardand from the otherside of the knetter, and means arranged to be operated by said element for gripping and releasing the threads as required during the knetting operation to avoid the necessity for holding the threads by hand.

5. Ina weavers knetter, the combination of a frame, a support for said frame, a rotatable knetting` bill mounted in said frame, an actuating element for revolving said bill, an arm at one side of the knetter pivotally mounted on said `frame for lateral swinging movement. toward and from the otherside of the knetter, parts carried by said arm to provide two thread guiding slots at one side of the bill, additional parts at the opposite side of the knetter providing two slots, one in front of the other, for guiding said respective threads, means` cooperating with said slots to guide the threads in the desired positional relationship to said bill, and connections arranged te Vbe operated by said element for relatively moving the Yparts at both sides of the knetter for gripping and releasing the threads at the desired points in the knetting operation and for swinging said arm outwardly at substantially the completion of said operation.

6. A knetter according to preceding claim 5, in which the thread clamping means at one side of the knetter includes a reciprocating member mounted on said arm, and that at the other side comprises a side piece at the latter side of the knetter and a slide mounted to reciprocate forward and backward relatively to and immediately beside said side piece, both said side piece and said slide having registering slots to guide the two threads te be united, the connections operated by said element being arranged to reciprocate said member and said slide.

7. In a weavers knetter, the combination of a frame, a Vsupport for said frame, a rotatable knetting bill mounted in said frame, an actuating element for revolving said bill, an arm at one side of the knetter pivotally mounted on said frame for lateral swinging movement toward and from the other side of the knetter, a member movably mounted on said arm and cooperating with a part carried by the arm to clamp one of the threads to be operated upon, Vadditional thread gripping means at the opposite side of the knetter, an internal cam on said element, and connections actuated by said cam for eperating said member.

8. In a weavers knetter, the combination of a frame, a support for said frame, a rotatable knetting bill mounted in said frame, an actuating element for revolving said bill, an arm at one side of the knetter pivotally mounted on said frame for lateral swinging movement toward and from the other side of the knetter, a member movably mounted on said arm and cooperating with a part carried by the arm to clamp one of the threads to be operated upon, additional thread gripping means at the opposite side of the knetter, cams on said element for operating said member to cause it to grip the thread and for subsequently swinging said arm and said member away from the bill, and connections actuated by said element for operating said thread gripping means at the other side of the knetter.

9. In a weavers knetter, the combination of a frame, a support for said frame, a rotatable knotting bill mounted in said frame, a swinging soi quadrant connected with said bill to revolve it, an arm at one side of the knotter mounted on said frame for lateral swinging movement toward and from the bill, a slide carried by said arm and cooperating with another part carried by the arm to clamp one of the threads to be knotted, an internal cam on said quadrant, a lever mounted on said frame closely beside the quadrant, a roll carried by said lever and arranged to be engaged by said cam, and connections through which the movement of said lever produced by said cam is transmitted to said slide to give the slide its thread clamping movement.

10. In a weavers knotter, the combination of a frame, a support for said frame, a rotatable knotting bill mounted in said frame, a swinging quadrant connected with said bill to revolve it, a side piece rigid with said frame and projecting forward beside the bill, said side piece having two slots therein to receive and guide the strands of thread to be tied together, a slide mounted between said bill and said side piece and closely beside the latter for forward and backward movement, said slide having two thread guiding slots arranged to register with the slots in said side piece in certain positions oi' the slide, a cam on said quadrant, and a lever arranged to be operated by said cam and associated with said slide to reciprocate it in timed relationship to the rotative movements of said bill.

11. In a weavers knotter, the combination with a frame, a rotatable knotting bill mounted in said frame, a swinging quadrant connected with said bill to revolve it, an arm at one side of the knotter mounted on said frame for lateral swinging movement toward and from the bill, a slide carried by said arm and cooperating with another part carried by said arm to clamp one of the threads to be knotted, two cams on said quadrant, and connections between said cams and said slide for causing the cams to operate successively during the movement of the quadrant to give said slide its thread clamping movement.

12. In a weavers knetter, the combination with a frame, a rotatable knotting bill mounted in said frame, a swinging quadrant connected with said bill to revolve it, an arm at one side of the knotter mounted on said frame for lateral swinging movement toward and from the bill, a slide carried by said arm and cooperating with another part carried by said arm to clamp one of the threads to be knotted, an internal cam on said quadrant, connections between said cam and said slide for causing the first part of the swinging movement of the quadrant to operate through said cam to move said slide toward its thread clamping position, and an external cam 23 on said quadrant arranged to operate on said slide at a later point in the swinging movement of the quadrant to hold the slide in its thread clamping position during at least a portion of the swinging movement of said arm.

NORMAN COOK.

Images