US2226240A - Cylinder motion for double cylinder jacquard - Google Patents

Description

Dec. 24, 1940. H. v. FOSTER I 2,226,240

CYLINbER MOTION FOR DOUBLE CYLINDER JACQUARD Filed June 5, 1939 a W c; a h i w 7 1 3 M n F 4 6 P V r N W 4 t m IHHHI IIIIIIIII. I, W a M v n 7 b H o .a mm HI ID :L m LJ I l Illll s {ii I F M I. o v 5 I H 0.1 llm .6 IBM! I1. I. C 4 k m & 0 n. A 1 a a A J A 3 r a Dec. 24, 1940. H. v. FOSTER 2,226,240

CYLINDER MOTION FOR DOUBLE CYLINDER JACQUARD Filed June 5, 1939 2 Sheets-Sheet 2 2 F152 I fig F156 a 5 Inventor at Herb er-t, V. Foster 6| K AttorrL-ey Patented Dec. 24, 1940 CYLINDER MOTION FOR DOUBLE CYLINDER JACQUARD Herbert V. Foster, Providence, R}. I., assignor t Crompton & Knowles Jacquard 8: vSupply Company, Pawtucket, R. I., a corporation of Massachusetts Application June, 5, 1939, Serial No. 277,486

4 Claims.

This invention relates. to improvements in jacquards and it is the general object of the invention to provide an improved driving mech- In double cylinder jacquards it has heretofore been customary to drive the cylinders by so-called S-cams which are connected to the vertically reciprocating knives or griffs. The cams have straight portions to produce dwells in the cylinder motion when the griifs are near the top or bottom extremes of their vertical motion, but the intermediate part of the cam has been inclined' in a direction to cause the cylinder to move away from the needles when the corresponding knives are rising and move toward the needles when the griff descends. Since both the cylinder and knives are connected to and driven from the same source of power the cylinder motion has been in phase with the knife motion.

Because of the identity of phase between the knife and cylinder motions the cylinder will be in a. particular position for any given position of the knife whether the latter is rising or falling and since the cylinder must be pressed against the needles until after the knife has risen above the jacks to prevent all the jacks from being lifted the cylinder will be in the same position during the descent of the knife and will push the jacks off the knife while the jacks are still supported by the knife. Because of this early action of the cylinder the knives, jacks, needles and cards are subject to objectionable wear.

It is desirable that the cylinder continue to assert control of the jacks until the knives rise above the latter but it is undesirable to have the cylinder assume control of the jacks at the early time above specified and the objectionable wear mentioned would be avoided if the motion of the cylinder toward the needles could be delayed until the jacks in engagement with the knifereach their lowest position and become disengaged from the knife. In a double cylinder jacquard it is desirable that the condition just described exist for both cylinders and it is a further object of my present invention to provide a drive for the cylinders which will give each of the latter a motion out of phase with the knife motion so that in the descent of the knife the incoming cylinder will belate in asserting control of the jacks and immediately thereafter on the ascent of the knife will be late to release control of the jacks.

In the type of jacquard to which my invention relates one set of knives will rise on one pick and another set will rise on the following pick, this condition being brought about by using a twopick double crank driven preferably from the bottom shaft of the loom. It is a further object of my present invention to use an additional crank also having a two-pick time and driven from the bottom shaft but spaced angularly from the cranks for the knives to effect a phase displacement between the cylinder and knife motion. By coupling the two cylinders together so that they reciprocate in unison and drive them from the additional crank the late movement of one cylinder motion away from its needle will coincide with a late approach of the other cylinder to its needle, the late timing for both cylinders being effected by the phase displacement already described so that the advantages of reduced wearing will accrue to the benefit of the partscontrolled by both cylinders as well as the knives.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth. In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a front elevation of a. jacquard together with its driving connections with the bottom shaft of the 100m, I

Fig. 2 is a detail end elevation looking in the direction of arrow 2, Fig. 1,

Fig. 3 is a front elevation on an enlarged scale of the connection between the supporting and driving rods for the two cylinders,

Fig. 4 is avertical section on line 4-4 of Fig. 3,

and I 7 Figs. 5 to arediagrammatic views showing the parts in different positions.

Referring to the drawings, the loom frame l5 has top and bottom shafts I6 and I1, respectively, whichare connected by a 2 to 1 gearing including a small top gear l8 on the shaft l6 meshing with a larger bottom gear of double the number of teeth l9 secured to the bottom shaft IT. The shaft l6 has a complete revolution for each pick of the loom and by means of the gears I8 and IS the bottom shaft I! has a complete revolution for every two picks of the loom. Shaft I1 is extended and carries a crank arm 2!] driving a rod head 2| connected to an ascending rod 22. The latter is attached as at 23 to a lever 24 moving about a fixed pivot 25 and connected by a link and retained by the head 58.

26 to a knife frame 21 supporting a series of lifter knives or griifs Kl.

Extending downwardly from the arm 20 is a second crank arm 3|] to drive a second rod head 3| connected to an ascending rod 32 pivoted as at 33 to another lever 34 swinging about a fixed pivot 35. The right end of lever 34 is attached by means of a link 35 to a knife frame 31 provided with a series of knives K2. The crank arms 20 and 30 extend to opposite sides of the bottom shaft l1 and by this arrangement alternate the reciprocating vertical motions of knives KI and K2. As set forth in Fig. l crank arm 20 is in high position which corresponds to a loW position for the knives Kl, while crank arm 30 is in low position and corresponds to a high position for knives K2. It is to be understood that during the operation of the loom one set of knives will be rising while the other set falls, and the greater part of a pick will be available for the actual lifting of the warp threads not shown which are controlled by the ascending knife. In other words, each set of knives requires two picks for a complete reciprocation thereof and the sets alternate in their rising motions.

The jacquard frame F is provided with two cylinders Cl and C2 at the left and right hand sides, respectively, as shown in Fig. 1. Cylinder Cl is mounted for rotation about the pivot 40 supported by a horizontal sliding rod 4| mounted in bearings 42 on the jacquard frame, and in a similar manner cylinder C2 is rotatable about a pivot 45 carried by the second sliding rod 46 mounted in slide bearings 41 on the jacquard frame. These cylinders C and C2 are provided with pattern cards PI and P2, respectively, which are fed in known manner by rotation of the cylinders.

The matter thus far described may be substantially the same as that found in ordinary double cylinder jacquards.

In orderv to connect the cylinders together so that they may reciprocate in unison and at properly spaced positions with respect to the parts which they control, rod 4| has secured thereto a collar 50 by means of adjustable set screws 5|, while rod 46 has secured thereto a collar 53 by means of screws 54. The collars are adjustable longitudinally along their respective rods and are caused to move together by a bolt 55 shown particularly in Fig. 4. This bolt may extend through a web 56 depending from the collar 5|] and is projected to the left of the latter as shown in Fig. 4 to receive a square block 51 pivoted on bolt 55 The block is located in a slot 59 in an upstanding web 6|] formed integral with the lower collar 53. By reason of the connection shown in Figs. 3 and 4 the two rods 4| and 46 are required to reciprocate in unison, the block 51 preventing any binding or cramping which might occur if the two rods are not exactly parallel.

In order to reciprocate the rods and the cylinders which they support I provide the crank arm 30 with an additional crank arm to which is pivoted a rod head 66 attached to an ascending rod 61 connected as at 68 to a cylinder operating lever 69. The latter has a fixed pivot 10 and has an upright arm 7| attached to a connector rod 12. The latter is pivoted as at 13 to a collar 14 secured adjustably on the rod 4|.

The additional crank arm 65 is provided with an arcuate slot 19 in which is located stud 80 constituting the pivot for the rod head 66. By reason of the arcuate slot the position of the pivot 80 can be changed with respect to the oppositely disposed crank arms 20 and 30. By reference to Fig. 2 it will be seen that crank arms 20 and 35 have crank pins 8| and 82, respectively, through which force is transmitted to operate the knives K| and K2, respectively. The pivots 8| and 82 are diametrically opposite so that the knives Kl reach their lowest position when the knives K2 reach their highest position and vice versa. It is desirable that this relationship exist so that the maximum shed may be formed in the loom to facilitate passage of the shuttle not shown.

The shaft turns in the direction of arrow a, Fig. 2, and arrow 22, Fig. 1. The pivots 8| and 82 lie on a diameter passing through the axis of shaft while the arm 65 supports the pivot 80 in a selected position which is angularly displaced from the aforesaid diameter. During the rotation of shaft I! the pivot 80 and therefore the motion of the cylinders will be out of phase with respect to the crank motion of the knives KI and K2 derived from the pivots 8| and 82, respectively. This phase displacement may be varied by reason of the slot 19.

Figs. 5 and 6 show diagrammatically the relationship between the cylinder motions, knives, and the jacks. In Fig. 5 the knife K is assumed to be near or in its lowest position corresponding to the dwell caused by movement of crank pin 8| through a position vertically over shaft 1, while knife K2 is in or near high position because of the location of crank pin 82 under shaft [1. The jacquard has a stationary support S through which project the lower ends of jacks J and J2 corresponding to knives KI and K2, respectively. Jack J is being held in the position shown in Fig. 5 by support S with its upper hooked end above the knife Kl. The support S is a common feature in jacquards and performs its usual function of supporting all of the jacks when their corresponding knives are in lowest position and supporting those jacks which have been moved out of the path of the corresponding knife when the latter ascends. 5 the jack J I has its hooked end vertically over the knife KI in full line position, a condition which would not exist if the previously mentioned 8 cams were used. This figure also shows that the cylinder Cl moves from the full to the dotted line position to move the hook J I out of the path of knife Kl after the jacks J I have descended to have supporting relation with the support S.

In Fig. 5 it is assumed that the cylinder Cl assumes control of the jacquard by moving from the full to the dotted line position while knife Kl is descending, while Fig. 6 shows the condition when the knife is ascending, the cylinder C| moved from the full to the dotted line position to relinquish control of jack J I after knife Kl has been raised to a position where it cannot engage the hooked end of said jack. It is to be understood that there will be a plurality of jacks for each knife and that the jacks will be controlled by the usual needles. In order to illustrate the invention I have chosen two needles N| and N2 which control jacks J and J2, respectively. In Figs. 7 to 10 I have shown diagrammatically and in more detail the relationship between the cylinders and the knives together with their driving cranks and the needles and jacks.

In Fig. 7 crank pins 8| and 82 are in vertical As shown in Fig.

alignment with shaft I! with pin 8| up and with crank pin 8|) lagging behind pin 8| and not yet in its highest position. Knife KI is therefore in lowest position while knife K2 is in highest position. Jack J is in lifting position with respect to knife Kl but is destined to be moved out of lifting position at the call of the pattern on cylinder Cl, which has just engaged needle N| in its right hand movement.

In Fig. 8 the cranks have moved so that pin is over'shaft I! and crank pin 8| has moved to I the right of and below its highest position, thereby lifting the knife K| to a position above the hook of jack J|. During the initial part of the up stroke of knife KI the cylinder Cl is moved to its extreme right position by arrival of crank pin 80 directly over shaft I1 and assuming a blank on the pattern card jack J I will be moved by its needle N| out of the path of knife KI Subsequent to the position of Fig. 8 cylinder Cl can safely relinquish control of jack J since it can no longer be raised by knife KI, and the cylinder CI will start to move to the left as crank pin 80 starts to the right and downwardly from the position shown in Fig. 8. The two relations described in connection with Figs. '7 and 8 occur on one beat or pick of the loom, namely, that which is controlled by cylinder C|.

Figs. 9 and 10 shows the controls for the next pick the pattern of which is determined by cylinder C2. In Fig. 9 it is assumed that the parts have moved so that crank pin 8| is vertically under shaft I'I while crank pin 82 is over it and the cylinder driving crank pin 80 is not yet in its lowest position. Under theseconditions cylinder CI has moved to a position close to the limit of its out motion where the cylinder will be given a quarter turn by mechanism not shown but well understood. During this time cylinder C2 has been moving to the left in unison with cylinder Cl and with the parts in the position shown in Fig. 9 cylinder C2 has just engaged needle N2 which controls jack J2 capable of being lifted by knife K2, the latter being down. Since crank pin 8| is in lowest position in Fig. 9 any further rotation in the direction of the arrow will start knife K2 on its up stroke.

Continued rotation of shaft I1 moves the crank pins to the position shown in Fig. 10 where the cylinder C2 has reached its inmost position because of the fact that crank pin 80 is now directly under shaft Knife K2 has risen to a point slightly above the top of jack J2 and control of needle N2 can therefore be relinquished by cylinder C2 without causing a mis-pick. As shaft rotates in a clockwise direction beyond the position shown in Fig. 10 the crank pin 8|] will start to rise and move cylinder C2 to the right away from needle N2.

From the showing in connection with Figs. 7 to 10 it is evident that the phase displacement between the cylinder and the knives exists for both cylinder Cl and C2. It is to be understood of course that if the pattern requires certain of the jacks to be lifted by their knives they will not be moved as described in connection with Figs. 7 to 10. Since the timing of the jacquard is important with respect to the jack which must clear the knives both on their down strokes and on the up stroke immediately following, the detailed description has been given for this condition.

It should be noted that the late approach of cylinder CI to a position corresponding to that of Fig. 8 is accompanied by the simultaneous movement of the cylinder C2 in its late movement away from needle controlling position. In other words cylinder CI must be late to assert control over needle NI and cylinder C2 must be late to relinquish control of needle N2 relatively to the knife motion. These two timings are assured as set forth herein by causing the cylinders to move in unison, one cylinder to assume and the other to relinquish needle control when the cylinders move in one direction, and the other cylinder to assume while the first, cylinder relinquishes control of the needle when the cylinders move in the oppositedirection. In both of these motions the same phase displacement exists and is effected by the single crank pin 80 because of its angular relation with respect to the crank pins 8| and From the foregoing it will be seen that I have provided a double cylinder jacquard wherein the cylinders are given a motion which is late with respect to the knife motions to the end that the incoming cylinder will not assert control over a jack still in engagement with a descending knife until the latter has moved below jack engaging position, and this timing is followed on the next up stroke of the knife by a corresponding late relinquishment of needle control by the cylinder delayed until the knife has reached a point in its upward travel where it can no longer engage a released jack. It will be seen that this result is accomplished by means of a single crank operatively connected to both cylinders to cause the latter to move in unison and with the crank causing the cylinders to reach the extremes of their reciprocating motions at a time out of phase with and later than the corresponding movements of the knives to their extreme position. This relationship exists for each cylinder and the cylinders are so related that when either moves to assume control of the needles by a time late with respect to the corresponding knives the other cylinder will moveby a motion which is also late with respect to its knives to relinquish control of the needles.

It will further be seen that the advantages set forth herein depend upon the fact that the crank which drives the cylinders requires two beats of the loom for its revolution, this fact maintaining I the proper relationship between the cylinders and the knives for all picks of the loom. Double cylinder jacquards have the advantage of being able to operate at high rates of speed inasmuch as each cylinder has two picks in which to leave and return to needlecontrolling position, and this advantage is retained by the type of cylinder drive described hereinbefore.

The use of a crank to drive the two cylinders C1 and C2 is not claimed herein but is made the subject matter of a separate application.

7 Having thus described my invention it will be seen that changes and modifications may be made therein by those, skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a Jacquard loom, a shaft having a revolution every second beat of the loom, a double crank on the. shaft having diametrically oppositev arms, a jack lifter knife, connections between the knife and one arm'to cause ascent of said knife on one beat of the loom and cause descent of said knife on the following beat of the loom, a second jack lifter knife, connections between the second knife and the other arm to lower said second knife when the first knife is ascending and raise said second knife when the first knife is descending, a needle and jack unit for each knife, two pattern cylinders, one for each unit, connecting means to cause the cylinders to move together, an additional crank arm on the shaft spaced angularly from one arm of the double crank and following the latter as the shaft rotates, and connections between the additional crank arm and the connecting means to move the cylinders in unison to move one cylinder toward the corresponding unit and move the other cylinder away from the unit corresponding thereto by a motion the cycle of which as determined by the additional crank is out of phase with and lags behind the cycle of movements of the knives as determined by the double crank.

2. In a Jacquard loom, a shaft having a revolution every second beat of the loom, a double crank on the shaft having diametrically opposite arms, a jack lifter knife, connections between the knife and one arm to cause ascent of said knife on one beat of the loom and cause descent of said knife on the following beat of the loom, a second jack lifter knife, connections between the second knife and the other arm to lower said second knife when the first knife is ascending and raise said second knife when the first knife is descending, a needle and jack unit for each knife, two pattern cylinders, one for each unit, connecting means between the cylinders to cause the latter to move in unison, an additional crank on the shaft nearer one of said arms of the double crank than the other arm and located behind said one arm with reference to the direction of rotation of the shaft, and driving means between the additional crank and the connecting means, said additional crank by reason of the fact that it is behind said one arm of the double crank causing i the cylinders to have a cycle of movements which are out of phase with and lag behind the cycle of movements of the knives as determined by the double crank, to the end that one cylinder approaches the corresponding unit and the other cylinder moves away from the unit corresponding thereto at a time subsequent to arrival of a descending knife in its lowest position.

3. In a Jacquard loom, a shaft having a revolution every second beat of the loom, a double crank on the shaft having diametrically opposite arms, a jack lifter knife, connections between the knife and one arm to cause ascent of said knife on one beat of the loom and cause descent of said knife on the following beat of the loom, a second jack lifter knife, connections between the second knife and the other arm to lower said second knife when the first knife is ascending and raise said second knife when the first knife is descending, a needle and jack unit for each knife, two pattern cylinders, one for each unit,

an additional crank arm on the bottom shaft, angularly displaced from and lagging behind one of said arms of the double cranks as the shaft rotates, connecting means to cause the cylinders to move in unison, and driving means connecting said connecting means to the additional crank and effective to cause the cylinders to reciprocate in unison as the shaft rotates, said cylinders moving in one direction on one beat of the loom and moving in the opposite direction on the following beat of the loom, the cycle of movements of the cylinders between their extreme positions as determined by the additional crank being out of phase with and lagging behind the cycle of movements of the knives as the latter move between their extreme'vertical positions as determined'by the double crank, to the end that each'cylinder will approach the corresponding unit and the other cylinder will move away from the unit corresponding thereto at a time subsequent to and following shortly after arrival of the knives at their extreme vertical positions.

4. In a Jacquard loom, a shaft having a revolution every second'beat of the loom, a double crank on the shaft having diametrically opposite arms, a jack lifter knife, connections between the knife and one arm to cause ascent of said knife on one beat of the loom and cause descent of said knife on the following beat of the loom, a second jack lifter knife, connections between the second knife and the other arm to lower said second knife when the first knife is ascending and raise said second knife when the first knife is descending, a needle and jack unit for each knife, two pattern cylinders, one for each unit, an additional crank on the shaft angularly displaced from one of the arms of the double crank in a direction opposite to that in which the shaft rotates so that said additional crank reaches a position in vertical alignment with the shaft at a time subsequent to that at which said one crank is in vertical alignment with the shaft, connecting means to cause the cylinders to move in unison, and attaching mechanism between the connecting means and the additional crank to cause said cylinders to reciprocate in unison as said additional crank turns with the shaft, each cylinder when moving toward and from the corresponding unit controlling the position ofthe jack of said corresponding unit with respect to the knife therefor by a cycle of movements as determined by the additional crank which is out of phase with and lags behind the cycle of movement of the knives as determined by the double crank, each jack to be moved away from its knife by the corresponding cylinder when said knifereaches a given position in the descent thereof as the cylinder moves toward the corresponding unit and the cylinder moving away from the unit to relinquish control of the corresponding jack when the knife in its ascent is higher than said given position.

HERBERT V. FOSTER.

Images