US2066532A - Loom - Google Patents

Description

Jan. 5, 1937.

w. D. KELLOGG ET A'L 2,066,532

LOOM

Filed March 18, 1936 3 Sheets-Sheet 1 INVEw'O' swfi MATTORNEYQ g Jan. 5, 1937.

W. D. KELLOGG El AL LOOM Filed March 18, 1936 3 Sheets-Sheet 2 ATTORNEYS 1937- w. D. KELLOGG El AL 2,056,532

Filed March 18, 1936 3 Sheets-Sheet 3 ATTORNEYS Patented Jan. 5, 1931 V UNITED STATES,

1 William D. Kellogg and John 'Fradenburgh, Amsterdam, N. Y., assignors to Mohawk Carpet 'Mills, Inc.,' Amsterdam, N. 2., a corporation bf New York Application March 18,1936, Serial No. tam

11 Claims. (01. 139-123).

This invention relates to weft inserting mechanisms or needle motions for use whom, such as those of the 'Axmlnster type, in which the weft threads are carried through the shed by a needle and interlocked with a selvedge cord, after which the inserted shot of weft is beaten .up by a lay. More particularly, the invention is concerned with an improved weft inserting mechanism by which the needle is given a reciprocating moveon a crank shaft may be employedto givethe I lay equal beats. Regardless of themeans used to operate the lay, the weft inserting needle must be so inserted and withdrawn from the shed as not to interfere with the lay in its beating-up movements. w

operating the lay, is an fAxminster loom of the type disclosed in the patent to Smith No. 186,374, Jan. 16, 1877, in which the lay is operated by a cam, and the cycle of operations includes three unequal periods or beats of the lay per revolution of the lay cam. For example, the'angular movement of the lay cam, during which the three weft shots are beaten up, may be 28, 56, and 36 degrees, respectively, totaling 120 degrees, or a third "of .the time required for one revolution of the cam. The remaining two-thirds of the time for one revolution '01 the cam is used for the: insertions and withdrawals of the needle, and with an ordi nary three shot construction in which there are three insertions and withdrawals of the needle 40 for each revolution of the cam, the time available for each insertion and withdrawal of the needle is that during which the lay cam rotates through 80 degrees. During those portions of a revolution of the cam in whichthe lay is beating v 5. up a shot, the needlemust remain out of the shed,

and if the lay beats are unequal, as in the example given, the periods during which the needle remains out of the shed are likewise unequal, and the needle motion must be constructed to impart that type of motion to the needle..

In looms of the Smith type. inwhich the lay is operated by a cam, it is customary to operate the needle by a drivenpower arm operatively connected to the needle. In order to obtain a retardation or dweil in the needle movement while ment which includes a retardation or dwell when A typical loom, employing the first means for the latter is out of the shed, the power arm is given an intermittent rotation in timer relation to the unequal time of the lay. Thus, during each complete revolution of the powerfarm, the needle is inserted into and withdrawn from the shed, and it remains out of the shed during the time thatthe lay is beating up the inserted shot. This intermittent motion imparted to the power arm requires that the arm, and its associated parts, be started and stopped suddenly, and as a result, the parts are subjected to repeated shock, and there is a limitation on the speed at which the loom can be run.

In order to overcome these-difllculties, an attempt has been made to employ a power arm which is driven continuously, and for this purpose, the needle is given a pronounced over travel whichwill consumesuflicient time to permit the lay to beat up the-inserted shots in either equal or unequal beats. With this construction, there are no dwells in the travel of the needle, except the momentary dwells which occur at the instants when the needle changes direction, and the shocks resulting from the use of an intermittently operating power arm are, accordingly, eliminated.

, The use of over travel of the needle is, however,

subject to the important disadvantage that, as the needle is withdrawn from the shed and proceeds to the'limit of its over travel, the weft thread is unsupported for a substantial distance from the selvedge of the fabric to the eye of the needle, and this condition results in frequent breakage of the thread, so that the running time of the loom is cut down and its efliciency and the rate of production are reduced. Moreover, the overtravel of the needle neeessitatesthe'use of aneedle guide rail of extraordinary length, and each. loom thus requires additional floor space.

Attempts have been made heretofore to employ a power arm, which is driven uniformly and continuously, by connecting the arm to the needle through a system of levers and toggles, this system-beingso arranged that a dwell is produced in the movement of the needle while it is out of the shed, so that the lay may beat up the inserted shed without interference from the needle. The prior, apparatus of this type, with which we are familiar, have not been wholly satisfactory because they have not provided dwells in the movement of the needle while it is out of the shed 50 of sufficient duration to permit the'lay to function, except by imparting a substantial over. travel to the needle.

In those looms in which the lay is operated by a crank shaft through connecting arms, more time is required for thebeating up of the weft shots, and this is particularly true when the crank shaft is connected to the lay through a toggle, so that the lay has a double beat. The increased time consumed by the lay on the beat up in such looms, necessitates a. corresponding retardation or dwell of the needle while it is out of the shed, and if a continuously operated power arm were to be employed on such a loom, the over travel of the needle and the length of the needle rail would be so great as to be impractical.

The present invention is, accordingly, directed to the provision of a new mechanism for weft insertion which overcomes the objections to the prior devices above described, and is greatly superior thereto in that the new mechanism includes a continuously operating power arm, and no substantial over travel of the needle is required. At the same time, the new mechanism may be employed in a variety of applications in which the lay is operated, either by a cam or a crank, and with either equal or unequal beats.

The new mechanism includes a power arm which may conveniently take the form of a crank on a shaft rotating continuously and uniformly throughout the operation of the loom, and this power arm drives the needle through connections which include an intermediate member actuated by the power arm and having a point between its ends which describes a circle, and a point at one end which is constrained to reciprocate, as the member is actuated by the power arm. The other end of the intermediate member is then connected to an oscillating element which is operatively comiected to the needle, and, as the intermediate member operates, it moves the oscillating member to two extreme portions corresponding to the full inward and full outward points on the path of travel of the needle. Thus, in one position, the oscillating member places the needle so that the selvedge shuttle may pass through the loop of weft thread carried bythe needle, and in the other position, the oscillating member places the needle wholly out of the shed so that the lay may function.

In certain looms in which a. retardation of the needle for a period equal to degrees of angular movement of the power arm is sufiicient to permitthe operation of the lay, the intermediate member may be connected to the oscillating member by a link, and the desired retardation may be obtained without over travel of the needle. In looms such as those of the Axminster type in which a greater retardation of the needle is required, such, for instance, as that corresponding to 168 degrees of angular movement of the power arm, to accommodate a lay movement having a duration of 56 degrees of movement of the arm, or in looms in which a retardation equivalent to about degrees of travel of the power arm is required to take care of a double beat movement of the lay, the intermediate member is connected to the oscillating member through a mechanical device which cooperates with the intermediate member in modifying the movement imparted to the needle by the power arm and oscillating member. Such a mechanical device may take the form of a toggle joint, and when that device is employed, the longer retardation of the needle referred to may be obtained without any substantial over travel.

Referring now to the drawings, Figure 1 is a view in elevation of a portion of a needle motion embodying the present invention, in which the intermediate member is connected to the oscillating member by a link;

Figure 2 is a fragmentary view in side elevation illustrating the action of the lay;

Figure 3 is a sectional view on the line 33 of Figure 1;

Figure 4 is a. view similar to Figure 1, but showing a form of the new mechanism in which a toggle is employed between the intermediate member and the needle;

Figure 5 is a diagrammatic view illustrating the operation of the parts of the mechanism shown in Figure 1; and

Figure 6 is a view similar to Figure 5, showing the positions of the parts of the mechanism as illustrated in Figure 4, during operation.

Referring now to the drawings, the loom is illustrated somewhat diagrammatically in Figures 1 and 3 as comprising the usual side frames 10 from which projects the supporting framework II for the needle motion, a. needle rail l2 on which the needle carriage I3 is moved being mounted on top of the framework. The needle I 4 for inserting the weft thread I5 is attached to the needle carriage in'the usual way, and when the needle is at the limit of its inward travel into the shed, the selvedge shuttle I 6, operating in the usual raceway in timed relation to the movement of the needle, passes the selvedge cord through the loop of weft thread carried by the needle. The inserted weft shot is then beaten up by a lay ll provided with the usual reed I8 and oscillated by appropriate means.

In the construction illustrated in Figure 1, the needle carriage is reciprocated lengthwise of the rail l2 by a flexible cable l9 which is guided by suitable sheaves 20 at the ends of the needle rail. The cable is fastened in the usual way to-a drum 2| mounted on a shaft 22 supported in suitable hearings on the framework II, and this shaft is provided with a pinion 23 which meshes with a segment gear 24 which ocillates on a fixed stud 25 on the framework I I. As the gear 24 oscillates, it causes the pinion and drum to rotate first in one direction and then in the other, and the cable attached to the drum moves the needle carriage and needle so that the needle is inserted in the shed and withdrawn therefrom.

During the operation of the needle, its movement must be retarded at each end of its stroke, and one retardation or dwell must be sufliciently long to permit the selvedge shuttle to pass the selvedge cord through the loop of weft thread carried by the needle, and the other dwell must be sufficiently long to permit the lay to beat up the inserted shot of weft. The nature of the needle movement is determined by the motion imparted to the segment gear, and the gear is driven by a constantly and uniformly rotating power arm through suitable connections which modify the movement of the arm so as to produce the desired retardations.

The power arm 26 is mounted fast on a shaft 21, which is supported in suitable bearings on the framework H and carries a bevel pinion 28 meshing with a. bevel gear 29 on the shaft 30 mounted in suitable bearings on the framework II, the shaft 30 rotating continuously and uniformly throughout the operation of the loom. The free end of the power arm is provided with a stud 3| on which is mounted an intermediate member 32, the stud connecting the power arm to the intermediate member between the ends of the latter. One end of the intermediate member is provided with a stud 33 carrying a cam ball 34 confined 5 the power arm causes the intermediate member to path which is non-circular.

attempt to follow the circle described by the end of the power arm, and the point on the intermediate'member at which it is connected by the stud 3! to the end of the power arm follows the circular path referred to. The end of the intermediate member carrying the cam ball is, however, constrained to move rectilinearly by the stationary cam 36, and the other end of the intermediate member, accordingly, describes a closed curved has one end connected to the end of the intermediate member describing the non-circular path, the link causes the gear 24 to oscillate about stud 25 as an axis with the gear moving between two extreme positions as the power arm rotates. The gear 24 is shown in Figure 1 in one of these extreme positions, and its other extreme position is indicated in that figure by dotted lines. In the full line position of the gear, the needle is fully in the shed in a position in which the selvedge shuttle may operate, and in the dotted line position of the gear, the needle is fully out of the shed so that the lay may operate without interference.

A detailed analysis of the movements of the several operating members of the mechanism il lustrated' in Figurel is shown in Figure 5, and'this analysis is based on the assumption thatthe beat up of the weft thread by the lay requires'a period of time equal to that consumed by the power arm in rotating in a clock-wise directionthrough an angle of 168 degrees, which'is a condition frequently met in actual practice.

In the analysis diagram, the line AB represents the power arm 26 in one position, the point A corresponding to the axis of shaft 21, the point B to the axis of pin 3|, the point H to the axis of the pin 31, the point R to the axis of the pin 39, and the point S to the axis of the stud 25. The line HN then represents the axis of the inter- V .mediate member 32, the line RH represents the axis of the link 38, andth line RS represents a radius of the segment gear 24 passing through the axis of stud 39.

As the power arm AB rotates about the point A as a center, the pointB, which isboth on the power arm andon the intermediate member, de-

scribes a circle. During this movement of the arm, the pointN at one. end'of the intermediate member is constrained to move along the straight line path NP, and the point H, which .is atthe other end of the intermediate member and at one endof the link 38, follows the closed curve Y,

while the point R atthe other end of ,the link and onthe oscillating member, moves through the angle RSU. a 1

When the power arm AB and the intermediate member I-IN occupythose positions, the link RH has caused the oscillating member to take one extreme position RScorresponding to the full inward position of, the needle in the shed, and while in thisposition, the needle musthave a dwell for a short period to permit the 'selvedge shuttle to pass the selvedge cord' through the loop in the weft thread carried by .theneedle. For this purpose, a time interval corresponding to a short angular movement of the power arm, as

Since the link 38.

for example, of 10 degrees is suflicient, and, as illustrated in the diagram, whenthe power arm AB turns through the angle BAC of 10 degrees so that the arm assumes the position represented by the line AC, the intermediate member moves to the position represented byithe line IN. During this movement of the intermediate member, it swings about the point N, as a center, the cam ball 34 at one. end of the member remaining stationary while the pin 31 at the other end of the member moves along the curve Y to the position I. During this movement of the member, the

link RH swings about the point B as a center to occupy the position represented by the line RI and this movement of the link produces substantially no movement of the segment gear. Accordingly, the needle, when in its full inward position, has a dwell of a duration equal to the time required for a 10 degree movement of the power arm.

The rotation of the power arm continues until it occupies the position AD, and during this movement, the end of the intermediate member connected to the link 38 has progressed. along the curve Y to the position J, and the other end of the intermediate member has traveled along the raceway 35 to the position 0, so that the intermediate member now occupies a position represented by the line JO. In this movement of the I intermediate member, the link 38 has caused the oscillating member to swing through the angle RST, so that the radius through the'stud 39 on the segment gear has moved from the position RS to the position TS. In this movement of the oscillating member, the needle has been withdrawn from'the shed, and the lay thereupon functions to beat up the weft thread left in the shed upon withdrawal of the needle.

The lay, in beating up the weft thread, requires a period equal to the time consumed by the power arm in passing through the angle DAG, which is equal to about 168 degrees, and during this movement of the power arm, the needle must remain out of the shed. In turning through this angle, the power arm first assumes the position AE in-which the intermediate member takes the position represented bythe line KP, and the end of the link connected to the intermediate member'moves along the curve Y to the position K,

during which movement the oscillating member passes through the, angle TSU to take up the position US, which is at the extreme end of the path of travel of the oscillating member in one direction. As the power arm continues to move, it assumes the position AF, and during this movement, the-cam ball on the end of theintermediate member moves from the point? to the point P, and then moves back to the point P. During this movement of the cam ball, the other .end of the intermediate member moves along the path Y from the point K to the point L. Thelink connected to the oscillating member likewise moves from the position 'U'K to the position ,UL, and that movement of the linkproducesa slight rocking of the oscillating member about pin S, which rocking roduces only a slight movement of the" needle. The continued rotationof the power arm causes it to movefrom the position AF to the position AG, .during which the cam ballbn the end, of the intermediate member movesfrom the point I to the point Q. The pin at the end of the intermfe diate member connecting it. to the 38then :moves from the point'L to the pointM on the curve Y, and the-corresponding movement of the link causes the oscillating member to move through the angle UST and assume the position TS. During this movement of the oscillating member, the needle moves from its extreme outer position to a point where it is just entering the shed, the lay having completed its heat up of the weft thread and having moved back out of the path of the needle.

A further rotation of the power arm from the position AG to the position AB causes the inter-. mediate member to move to the position HN, the cam ball thereon moving from the position Q to N. During this movement, the end of the link connected to the intermediate member moves along the path Y from the point M to the point H, and the link causes the oscillating member to move through the angle TSR. to its original position RS. As the oscillating member thus moves, the needle is moved into the shed and to the position in which the selvedge shuttle may pass the selvedge cord through the loop of weft thread 7 carried by the needle.

It will be apparent from the analysis that in the movement of the power arm through the angle GAD in a clockwise direction, the arm has caused the oscillating member to move from the position represented by the line TS to that represented by the line RS and back again, and this movement of the oscillating member has in turn caused the needle to be inserted and withdrawn from the shed. At the end of the' inward movement of the, needle, the needle has remained substantially stationary for a period during which the power arm has moved through an angle of 10 degrees. During the movement of the power arm through the angle DAG of 168 degrees, the oscillating member has moved from the position TS to the position US and then moved back again, and during this movement of the member, the needle has been wholly outside the shed, so that the lay has been free to beat up the inserted weft thread. The length of the arc TR thus corresponds to the length of the travel of the needle in one direction in the shed, and the length of the arc TU represents the length of the travel of the needle. while it is out of the shed and during the time that the lay is beating up. In actual practice, the travel of the needle in the shed may be 30 /2", and the travel out of the shed only 6 this latter distance representing over travel.

In looms in which the time required for the beating up of a. weft thread is equal to a period during which the power arm travels through approximately degrees instead of 168 degrees, the travel of the oscillating member from the position TS to the position US is reduced to a fraction of an inch. As a result, the needle remains substantially at rest while the power arm turns through 120 degrees and there is very little over travel of the needle.

In looms in which the time required for the beat up of the weft thread is approximately that required {or a travel of the power arm through an angle from about 168 degrees to 200 degrees, and it is desired to eliminate even the small over travel of the needle which takes place with the mechanism illustrated in Figure l, the apparatus employed may take the form shown in Figure 4.. In this construction, the power arm, the intermediate member, and the means for constraining one end of the intermediate member to cause that end to move along a rectilinear path are theme as those employed in the Figure 1 construction, but the link 38 is not connected directly to .an oscillating member similar to the segment gear 24, but is connected to the center of a toggle joint having one end fixed and the other end connected to an oscillating member which is in turn connected to the needle carriage.

As shown in Figure 4, one end of the link 38 is connected by pin 31 to one end of the intermediate member 32, and the other end of the link is connected by a pin 40 to one end of an arm 4| pivotally mounted on. the framework II by means of a stud 42. The pin 40 also serves as a support for one end of a link 43, the other of which is attached by a pin 44 to an oscillating member 45 pivotally mounted on the framework on a stud 46. A needle drixdng arm 41 is rigidly mounted at one end on the oscillating member 45, and at its other end, the arm 41 is connected by a link 48 to the needle carriage. As the arm 41 is swung through an are by the rocking of the member 45, the needle carriage I3 is moved along the guide rail 2 and the needle is inserted and withdrawn from the shed.

The oscillating member 45 in the Figure 4 construction may be considered to correspond to the oscillating segment gear 24 of the Figure 1 construction, and it will be noted that the link 38 is connected to the oscillating member 45 through a toggle joint, the elements 4| and 43 of which also have an oscillating movement.

For an analysis of the movements of the parts shown in Figure 4, reference may be had to Figure 6. In this figure, the letter A represents the axis of rotation of the power arm, B the axis of the pin 3| connecting the end of the power arm to the intermediate member 32, H the pin 3! connecting the end of the intermediate member to the link 38, and R the axis of pin 40 connecting' the link to the togglearm 4|. The line RS represents the longitudinal axis of the arm 4|, the line RW represents the axis of the link 43, and the line VW represents the axis of the oscillating member 45, the member in that position having moved the needle to its full inward position in which the selvedge shuttle is free to act. When the member 45 is in the position VX, the

needle is at its extreme outward position, and

while it remains there, the lay functions.

When the needle is in its full inward position, it must remain substantially at rest for a short -period to permit the selvedge shuttle to funcneedle remains substantially at rest when fully in the shed through a period during which thepower arm passes through an angle of 10 degrees.

' As the power arm-continues to rotate clockwise, it produces a movement of the arm 4| from the position RS to the position TS, and this re sults in a movement of the needle, the latter being withdrawn whenthe arm 4| moves from the position RS to the position TS and being inserted when arm moves back from TS to RS. During the movement of the arm from the position RS to the positio theoscillating member 45 moves from the??? tion VX, and it returns to 'itsorigi'nal position with the return of the'arm.

When the power arm reaches the position AD, 75

sition W to the posithe arm 4| is in the position TS, the oscillating member 45 is in the position VX, and the needle is fully withdrawn from the shed. The needle must now remain substantially at rest for a period in which the lay operates, "and, in the analysis illustrated, this dwell of the needle continues for a period during which the power arm moves through the angle DAG, which is substantially 168 degrees. During the movement of the power arm through this angle, the arm 4| moves from the position TS to the position US, and then back to the position TS, but these movements of the arm producesubstantially no movement of the secondmember 45 since the points T and U lie on a circle about the point X as a center. The oscillating member thus re mains at rest and the needle has no movement. Accordingly, by the use of the toggle connection between the link 38 and oscillating member 45, the new mechanism makes itpossible to obtain a dwell in the movement of the needle when it is out of the shed for a period corresponding to an angular movement of the power arm through 168 degrees.

In both forms of apparatus as described, the

retardation or dwell of the needle when it is' fully within the shed, for the purpose of permitting the selvedge shuttle to operate, is provided by so constructing the mechanism that during the period of operation of the shuttle, the

operation, because if the needle had such overtravel inward, it would pass beyond the shuttle. This would require the use of aspecial type of needle and it might be diflicult in the operation of the loom to position theneedle during the operation of the shuttle in such manner that the shuttle would be certain to pass through the loop of weft thread carried by the needle. Because of these considerations, we prefer to provide a, dwell at each end or the path of travel of the needle. v

From the foregoing, itv will be evident that a with both forms of the new apparatus described,

the needle is moved into and out of the shed by means of a continuously and uniformly rotating power arm, and at each end of the needle movement, it has a retardation or dwell. These dwells are oi. difierent durations, the one occurring when the needle is in the shed and during which the selvedge shuttle operates, being relatively short, and the other occurring when the needle is out of the shed and during which the lay beats up the inserted weft thread, being relatively long. In the first apparatus shown in Figure 1, the

I needle has a slight over iiadvel when the apparathe needle rail. In thesecond form of the ap-' paratus shown in Figure 4, the desired result is accomplished without any over travel of the needle whatever. Inboth forms, the dwells at the ends of the stroke of the needle are of appropriate duration for the purpose for which they are provided, and their duration may be 'varied by suitable changes in the connections.

The new mechanism, accordingly, makes it possible to operate the loom efficiently and the needle motion imposes no limitations on the speed of operation. Also, it functions without shock. to the parts, such as occur when an intermittently of travel, said means .including a constantly and uniformly rotating power arm, a member connected between its ends to the arm and having one end constrained to move along arectilinear path, and a connection between the other end of the member and the needle.

2. In a loom, the combinatioh of a needle movable into and out of the shed, means for imparting to the needle a reciprocating movement with a retardation at at'least one end of its path of travel, said means including a constantly and uniformly rotating power arm, a member connected betweenits ends to the arm with said point of connection describing a circle as the arm rotates, a connection between the needle and a'polnt on the member which describes a non-circular closed path as the arm rotates, and means'for limiting to a rectilinear movement a point on the member "remote from the point of connection tothe needle and on the opposite side of the member from the point of connection to the arm. .3. In a loom, the combination of a needle movable into andout ofthe shed, and means for imparting to the needle an endwise reciprocating movement with a dwell at at least one end 0! its path of travel, said means including a constantly and uniformly rotating power am, an intermediate member connected between its ends to the power arm,said member having one end constrained to reciprocate as the arm rotates, an oscillating member operatively connected to the needle, and means including a link for connecting the oscillating member and the other end of the intermediate member.

4. In a loom, the combination of a needle movable into and out of the shed, a power arm rotating with a constant and uniform motion, a cable drum, a cable attached to said drum and to said needle, anoscillating member for rotating said drum in opposite directions, and means actuated by said power arm for oscillating said member,

said means including an intermediate memberconnected between its ends to the power arm and having one end. constrained to move rectilinearly as the intermediate member is actuated by the arm, and a connection between the intermediate member and the oscillating member.

5. In a loom, the combination of a needle movtable into and out of the shed, a power arm ro-1 tating with a continuous and uniform motion, an'

oscillating member operatively connected to the needle, means driven by thepower arm for ac-,=

tuating said oscillating member, said means including an intermediate member connected to the powerarm and-ha a portion constrained to move al ng the rectilinear path, and a toggle joint connected to the intermediate member and to the oscillating member and actuated by the intermediate member to oscillate the oscillating member.

6. In a loom, the combination of a needle movable into and out of the shed, a power arm rotating with a continuous and uniform motion, an oscillating member operatively connected to the needle, and means driven by the power arm for actuating said oscillating member, said means including an intermediate member actuated by the power arm and having a portion constrained to move rectilinearly, and a pair of toggle members connected to each other and to the intermediate member at the same point, one of said members swinging about a fixed pivot and the other member being connected to the oscillating member, the movements of said other toggle member produced by the intermediate member causing the oscillations of the oscillating member.

'7. In a loom, the combination of a needle movable into and out of the shed, a cable connected to the needle, a cable drum to which the cable is attached, an oscillating member operable to rotate the drum alternately in opposite directions. means for operating the oscillating member, said means including a power arm rotating with a continuous and uniform motion, an intermediate member connected between its ends to the power arm, said member having one end connected to the oscillating member, and means for constraining the other end of the intermediate member to move along a rectilinear path.

8. In a loom, the combination of a needle movable into and out of the shed, an oscillating member connected operatively to the needle, and means for oscillating said member, said means including a power arm rotating with a continuous and uniform motion, an intermediate member connected between its ends to the power arm, means for constraining one end of the intermediate member to move along a rectilinear path, and a connection between the other end of said intermediate member and the oscillating member, said connection including a toggle joint and a link connected to the pivot of said toggle joint.

9. In a needle motion for a shuttleless loom, the combination of a needle movable into and out of the shed of the loom, an oscilllating member operatively connected to the needle, a constantly and uniformly operating power arm, an intermediate member connected between its ends to the power arm and having one. end free to follow the movement of the power arm and the other constrained to move with a reciprocating motion, and a link connected to the other end of the intermediate member and to the oscillating member to cause the latter to move to two extreme positions, the intermediate member being efiective at each extreme position of the oscillating member to cause a retardation in the movement of the oscillating member when the needle is fully in and fully out of the shed.

10. In a needle motion for a shuttleless loom, the combination of a needle movable into and out of the shed of the loom, an oscillating member operatively connected to the needle, a power arm rotating with a continuous and uniform motion, an intermediate member connected between its ends to the power arm and having one end constrained to reciprocate along a rectilinear path and the other end free to follow the movement of the power arm, a mechanical device operatively connected to the oscillating member and to the free end of the intermediate member. said oscillating member being moved to two extreme positions in one of which the intermediate member causes a retardation in the movement of the oscillating member when the needle is in the shed and in the other of which the mechanical device is effective to produce a dwell in the movement of the oscillating member when the needle is out of the shed.

11. In a needle motion for a shuttleless loom, the combination of a needle movable into and out of the loom, and means for actuating the needle with a relatively short dwell at one end of its path and a relatively prolonged dwell at the other end of its path, said means including a power arm, an oscillating member rotating with a continuous and uniform motion, an intermediate member connected between its ends to the power arm, said member having one end constrained to reciprocate and the other end free to describe a closed path as the power arm rotates, an oscillating member operatively connected to the needle, a link connected to the free end of the intermediate member, and a mechanical device connected to the oscillating member and to the link to be actuated by the latter, the intermediate member being effective to produce the relatively short dwell and the intermediate member and mechanical device cooperating to produce the relatively long dwell.

WILLIAM D. KELLOGG. JOHN FRADENBURGH.

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