US1970832A - Lay motion for looms - Google Patents

Description

Aug. 21,1934. vBAKER 1,970,832

LAY MOTION FOR LOOMS Filed Feb. 8, 1932 2 Sheets-Sheet 1 INVENTOR WILLIAM HBAKER.

ATTORNEY Aug. 21, 1934. w. H. BAKER LAY MOTION FOR LOOMS.

2 Sheets-Sheet 2 Filed Feb. 8, 1952 FIG. 5.

3, I INVENTOR WILLIAM H BAKER.

ATTORNEY Patented Aug. 21, 1934 usurp stares at i Wis 14 Claims.

This invention relates to improvements in lay motions for looms, that is. to say, the instrumen talities associated with the lay to effect'backward and forward beating thereof and comprising es- 5. sentially a crank shaft and means operatively connecting the crank with the lay.

The primary object of the invention is to provide a lay motion adapted to move the lay from its forward position quickly through the major portion of its backward beat and then more slowly through the remaining minor portion of its backward beat and through the initial minor portion of its forward beat and finally, quickly through the major portion of the forward beat l5. whereby the lay is caused to dwell in register with the open shed of the warp during a larger proportion than usual of the time-duration of the crank cycle.

More precisely, the invention aims to provide means for modifying the movement imparted by the crank to the lay, to the end that approximately the initial two-thirds of backward beat and the final two-thirds of forward beat are. effected during one continuous half of the crank cycle, while approximately the final one-third of the backward beat and the initial one-third of the forward beat are effected during the other half of the crank cycle. 1

A further object of the invention is to so modify the lay vmovement relatively to the crank movement that the lay will register with the open shed of warp earlier than usualin the time duration oi the crank cycle,.whereby shuttle movement may be initiated earlier in the crankcycle, thus enabling lower shuttle speeds with less wear on the warp, less consumption of power and less shuttle checking shock in the loom or, conversely, increased loom speed without increased wear on the warp, increased power consumption and increased .shuttle checking shock.

A still further object concomitant with that last aforesaid, is to so modify the lay movement relatively to the crank movement that the lay will not only register with the open shed of. warp earlier in the crank cycle but will remain in register for a greater proportion than usual of the time duration of the crank cycle whereby a larger shuttle may be used carrying a greater amount of filling than usual.

Another object is to providelay movement modifying means of such design and disposition that.

it will not interfere with other mechanisms of the loom. such as warp stop mechanism.

Still another object is to provide alay motion which will produce less vibration than usual in in Fig. 1.

operation and which will be free from detrimental mechanical wear.

An additional object isto provide a lay motion of inexpensive, simple and durable construction applicable equally to new looms and to existing looms.

Various other objects and the advantages of the invention may be ascertained from the following description and the accompanying drawings which disclose certain embodiments of the invention, but to which embodiments and the details thereof the invention is not limited, as other embodiments and modifications of and substitutions for details are contemplated.

The invention resides broadly in the provision of an articulated connection or toggle interposed between the crank and the lay; and means controlling the angular relation of the elements of said toggle in suchwise that movement imparted by the crank is amplified in transmission to the lay in certain parts of the crank cycle and is diminished in other parts of the crank cycle whereby the lay movement is at times amplified and accelerated relatively to the crank movement and at other times is diminished and decelerated to the end that the pick may be advanced inthe crank cycle and the lay will dwell in open shed position during more than usual of the duration of the crank cycle. 1

More particularly the invention resides in the elements or features and combinations thereof as herein broadly and specifically described and. claimed and disclosed in the accompanying drawings, in which v Fig. l is a-view showing an end elevation of that embodiment of the invention now generally preferred in association with related parts of a loom of conventional design.

Fig. 2 is a plan View of the structure illustrated in Fig. 1. s

Fig. 3 is a diagram illustrating the functioning of the lay motiondepicted in Figures 1 and 2. v Fig. 4 is a view similar, to Fig.1 illustrating ,a modification of the embodiment shown in Fig. 1.

Fig. 5 is a further view similar to Fig. 1 illustrating an embodiment in which the motion is inverted as compared with the embodiment shown Fig. 6 is a fragmentary elevation further modification.

Referring more particularly to the. drawings, 11 designates the end frames of a loom, 1,2 the loom lay supported by swords 13 pivotally mounted on the loom at 14, and 15 the lay operating showing a crank shaft having cranks 16. In Figs. 1, 4-a nd 5 the lay is illustrated in its rearward or beat back position and the warp threads 1'7 are shown held in the open shed position by the heddles 18. The arch of the loom frame is designated 19.

The cranks are severally connected to the swords by articulated or toggle driving connections, each of which comprises a forward toggle arm or pitrnan 20 and. a rear toggle arm or link 21. The forward arm or pitman is pivoted at its front end at 22 to the sword and at its rear end at 23 to the front end of the rear arm or link 21, the rear end of the rear arm or link 21 being operatively associated with the crank pin 16..

In practice, the pivot pins 22 and 23 are preferably fixed irrevolubly in the links 21 and swords, respectively, and are relatively rotatable in the pitmans, suitable means being provided, as usual, on the pitinans for taking up wear. Likewise, the rear ends of the links 21 are preferably provided with any suitable form of adjustable bearings encircling the crank pins.

The means for controlling the angular relation of the arms of each toggle whereby the same may transmit movement from the crank pins to the swords and lay comprises an oscillatable arm 24 rigidly connected at one end to one of the toggle arms, for example, the rear arm 21, andat the opposite end connected to guiding and oscillation controlling means preferably in the form of a radius link 25 pivotally connected at one end, at 26, to the oscillator and at the other end, at '27, to a bracket 28 secured to any suitable part of the loom frame.

A tie bar 29 may be connected between the oscillators at opposite ends of the loom to brace the oscillators against swaying inthe lengthwise direction of the loom. a

In the embodiment shown in Fig. 1, the oscillators 24 extend upwardly from the links 21 and the bracket 28 is attached to the frame arch and projects rearwardly therefrom. The anchor pivot 27 of the radius link is located below and to the rear of the upper end of the oscillator so that in all positions the radius link inclines upwardly and forwardly from its anchor pivot. Also the anchor pivot and radius link are on the opposite side ofthe oscillator from the toggle and lay.

In themodification shown in Fig. i, a bracket 28* projecting upwardly and forwardly from the frame arch-replaces the bracket 28 and disposes the anchor pivot in front of and above the upper end of the oscillator, so that the radius link inclines downwardly and rearwardly from the anchor pivot. It will be noted that in the modification the radius link is on the same side of the oscillator as the toggle and lay.

In the embodiment shown in Fig. 5, the arrangement of the toggle with reference tothe crank and lay is'substantially the same as already described, but the toggle controlling mechanism is located below the toggle instead of above the same. The oscill ato r2 i depends from the toggle link 21 and the bracket 28 is connected to a lower part of theend frame 11. While the radius link 25 in this embodiment is shown as in the rear ;of 1 and inclining upwardlyfrom the lower endof the oscillator, it willibe obvious its posi 24?, is longitudinally slidable, the guide so being mounted by means of the anchor pivot 27 on a bracket 28 which may replace any one of the brackets 28, 28 or 23 one side of the guide, it will be understood it may be otherwise located.

The operation of the device will be described in connection with the presently preferred embodiment depicted in Figure 1 and by reference to the diagram, Fig. 3. The arrangement illustrated is that now regarded as producing, all factors considered, the optimum result in practice. It will be understood, however, that in some instances (particularly in application of the motion to existing looms) the most advantageous relations of the pivotal points cannot be realized and that there may be, in consequence, considerable variation from the relations herein described, certain of which variations will be hereafter dealt with. For purposes of illustration and description, the axes of the crank pins when at their extreme front and back positions a and --c-, also the axis of the crank shaft, are presumed to lie in a plane xa:, which is tangent to the arc of travel of the pivot-22 at the mid point of the arc.

When the lay is in .its forward position, the crank is also in its forward position -a and the toggle members 20 and 21, oscillator 24 and radius link 25 are in the positions shown in light full lines in the diagram. When the crank moves through 90 to its top position -b--, it imparts rearward and upward motion to the toggle 20, 21 and to the oscillator 24, which communicates the upward movement to the radius link 25, causing it to swing to the dotted line position b. Movement of the radius link causes later-a1 oscillation of the oscillator which, being fixed to the toggle arm 21, causes the toggle to be folded to the dotted line position, so as to shorten the straight line distance between the toggle ends. This shortening of the toggle imparts rearward movement to the sword, additional to the movement due directly to the crank. By this means, the lay is moved through more than half its rearward travel, while the crank moves through only half its. rearward travel. Thus, the lay moves through more than half its rearward beat in half the travel time.

In the second quadrant of crank movement from b.to c-, the oscillator is lowered and the radius link operates to swing it forward, so that it straightens the toggle as the toggle moves rearward and thus offsets the rearward movement and produces a resultant rearward 1novement of the pin 22 less than the rearward movement of the crank. The lay is thus moved through less than half its rearward beat while the crank moves through the second half of its rearward travel. The positions of the parts after 180 of crank movement are indicated in the diagram by heavy full lines.

In the third quadrant of crank movement from --c to ,d-, the lowering of the oscillator causes theradius arm to carry the upper end of theos'cillator forward, so that the toggle is again folded and shortened, as shown in broken line in the diagram. The shortening of the toggle offsets its bodily forward movement as received from the crank, so that the lay is moved forward less thanhalf its beat, while the crank moves through half its forward travel.

1 .In the fourth quadrant of crank movement,

from -dto -a-, the oscillator is raised and under influence of the radius link operates to straighten the toggle, so that the lay receives not only the forward movement due to the crank While the pivot point islocated about midway between the ends of and to lblll receives also the additional forward movement due to straightening of the toggle and is thus moved through more than half its forward beat, while the crank moves through the second .half of its forward travel.

The mechanism as illustrated moves the lay through approximately the'first two-thirds of :its backward beat and the final two-thirds of its forward beat in the first and fourth quadrants of the crank cycle respectively and throughapproximately the final third of its backward beat and the first third of its forward beat in the secand and third quadrants of the crank cycle.

This results in locating the lay in the. sustantially full open shed position during approximately one-half of the crank cycle and enables a larger shuttle to be used, or conversely, enables the speed .of the loom to be increased without increasing the shuttle speed. The extensive rearward movement of the lay during the first quadrant of the crank 'cycle enables the pick to be started approximately 10 to 15 earlier .in crank cycle, so that more time is allowed for the shuttle to cross the loom. In practice, 10% to 15% or more additional time is obtained for shuttle movement.

It will be observed that the variations in the rate of lay movement as described result from imposing on the movement imparted by the crank an additional movement, which is alternately added to and subtracted from the crank movement and which results from the folding and unfolding of the toggle 20, 21. It follows, therefore, that the result obtained is primarily a product of the proportioning of the toggle members and of the angular displacement thereof relatively to one another, which displacement depends upon the length of the oscillator and the ratio of lateral movement imparted to the upper and lower ends of the oscillator by the radius link or equivalent and the crank, respectively. In general terms, the greater the length of the controlled toggle arm 21 relatively to the length of the other arm or pitman 20, the greater will be the length variation of the toggle for any angular movement of the toggle arm 21 relatively to a straight line connecting the crank pin 16 and the wrist pin '22. The angular displacement of the toggle arm 21 depends upon the length of the oscillator and the ratio of lateral movement at the upper and lower ends thereof. The extent of lateral movement imparted to the upper end of the oscillator by the radius link depends largely on the distance of the anchor pivot 27 laterally from the oscillator and to a lesser degree upon the length of the radius link. The closer the pivot 2"! isto the oscillator, the greater will be the lateral travel and the more nearly horizontal will be the portion .db of the are 11-11 and, the longer the link, the flatter will be the arc. It is preferred to so position the pivot that the minimum angle between the link 25 and a line ze passing through the anchor pivot 27 and parallel with the line a:r will be between 0 and approximately 30; or, in other words, to so position the pivot that the lateral movement of the upper end of the oscillator is not less than the lateral movement of its lower end. Lateral movement of this amplitude will produce a substantial angular displacement of the toggle link 21 and a substantial change of length of the toggle. The effect of lateral movement of the upper end of the oscillator in producing angular displacement of the toggle arm 21 is obviously increased by decreasing the length of the oscillator and diminished by increasing the length of the oscillater. As already stated, the effect of any angular movement of the toggle arm 21 in varying the length of the toggle may be varied by changing the length of the arm 21 relatively to the length of the arm 20.

The forceof the foregoing statements as to lateral movement of the upper end of the oscillator will be apparent from consideration of a condition in which the pivot 27 is raised to about the mean level of the pivot 26, so that the pivot 26 moves about equally above and below a line corresponding to the line z-z. The are of travel of the pivot .26 will then be substantially vertical and the lateral'ntovement of the upper end of the oscillator will be very little. Even under these conditions the angular displacement of the toggle arm 21 will be considerable, though less than shown in the diagram, and useful modification of the lay movement will result. By lowering the anchor pivot 27 and moving it closer to the oscillator, the variations of lay movement may be increased beyond those illustrated up to a practical limit determined by the minimum angle between the radiuslink and the oscillator- The fact that useful results may be obtained with but little lateral movement of the free end of the oscillator, at the level of the anchor pivot 27, enables use of amodifiedform of guiding :means, such as shown in Fig. 6, which holds the oscillator against any material lateral movement at the level of the anchor pivot 2'7. In the arrangement of Fig. 6, that portion of the guide between the pivot 2'? and the axis of the oscillate is in reality a very short radius link.

From the foregoing, it will be seen considerable latitude is permissible in the location of the anchor pivot, and in theproportioning of the various parts. This characteristic is particularly valuable in the application of the invention to existing looms, as it permits of readily locating the mechanism conveniently with reference to the loom parts and of proportioning the various members to obtain desired results while compensating for conditions such as location of a crank shaft above or below the line r-r. In some instances, .it may be desirable to have the crank shaft located slightly out of this line in order to compensate for the slightly different actions of the toggle above and below the line, due to the differences in lateral movement of the pivot 26 in the difierent quadrants of crank movement. As suggestive of relative adjustment of dimensions to obtain a given result, it may be stated that if sufficient lateralmovement cannot be given the upper end of the oscillator, the oscillator may be shortened and/or the toggle arm 21 lengthened. As it is usually advisable to employ a fairly long oscillator in order to locate the radius link out of the way of other loom parts, considerable lateral movement is usually desirable. Greater amplitude of movement is also desirable in that wear at the pivots has substantially no effect in altering the lay movement. 7

If the toggle connection between the cranklfi and wrist pin 22 is held straight and rigid and the compelling the foldingand unfolding of the toggle to obtain the desired regularly varying movement of the lay.

It may be stated, the mechanism can be readily proportioned to produce considerably more than two-thirds of lay beat in the first and last quadrants of the crank cycle but such great variations are not now deemed desirable. While the arrangement shown, which produces approximately similar lay movement in both beats, is now preferred on account of its symmetry and freedom from vibration, it will be understood the mecha ,nism may be made to give different movements in the back and forward beats respectively, this effect being obtainable by suitable location of the anchor pivot 27 and suitable dimensioning of the radius link and oscillator.

The advantages of the invention from the operation aspect will be obvious from the foregoing description. In addition, it may be pointed out themechanism is simple, inexpensive and easy to install on existing looms .aswell as to incorporate in new looms. The mechanism does not extend rearwardly of the crank shaft at an elevation where it will interfere with other parts of the loom, such as the warp stop motion. Besides enabling higher loom speeds or, alternatively, larger shuttles with consequent increased production or lower shuttle speeds with less wear on the warp and less vibration due to shuttle checking, use of the invention very materially reduces vibration and power consumption.

In the following claims, the term oscillation as applied to the element 211 indicates the. move" ment of this elementrwith reference to a straight line connecting the crank pin 16 and'the wrist pin 22.

Having thus described my invention, what I claim is:

1. In a lay motion for looms, the combination with a loom lay and an actuating crank therefor, of an articulated driving connection between the lay and crank shaft comprising a pair of links arranged end to end and pivotally connected together at adjacent ends and connected at their remote ends to the lay and crank respectively, a controlling arm connected at one end to said crank connected link whereby it will receive vertical and lateral movement from the crank, and means operatively connected to the opposite end of said controlling arm to restrict the movement of said opposite end, produced by the actuation of said crank and articulated driving connection, to

movement in a regular substantially vertical arcuate'path in such wise that the members of said articulated lay driving connection are angularly displace relatively to one another, alternately in opposite end, produced by the actuation of said lengthening effect in said articulated lay driving connection, and whereby the lay is moved back from its forward position more than one-half of its beat during a quadrant of crank rotation and through the remainder of its backward beat in the second quadrant of crank rotation and 'is moved forward from its back position less than one-half its beat during the third quadrant of crank rotation and forward through the remainder of its beat during the fourth quadrant of crank rotation.

. 2. A lay motion fOllOOll'lS comprising the combination with an actuating crank, a loom lay and 1a pitmanpivotally connected at its front end to the lay; of a link pivotally connected at its front end to the rear end of the pitman and operatively connected at its rear end to the crank whereby said link will transmit lateral movement of the crank to the pitman and lay; an arm connected .to said link and disposed substantially perpendicularly thereto; and an oscillatably mounted member movably connected .to said arm at a point remote from the link, to restrict the movement of said remote point to movement in a regular substantially vertical arcuate path, said member being disposed and adapted to be oscillated by the arm and to impart oscillatory motion to the arm and link such that lateral motion independent of that derived from the crank is imparted to the front end of the link, the said lateral motion being opposite to that received from the crank during one-half of the crank cycle and being in the same direction as that received from the crank during the other half of the crank cycle whereby the resultant lateral movement imparted to the lay is lessv in one-half of the crank cycle than in the other half.

3. A lay motion for looms comprising the combination with an actuating crank, a loom lay and a pitman pivotally connected at its front end to the lay; of a link pivotally connected at its front end to the rear end of the pitman and operatively connected at its rear end to the crank whereby said link will transmit lateral movement of the crank to the pitman and lay; an arm connected to said link and disposed substantially perpendicularly thereto; and means connected to the arm at a point vertically spaced from the crank to restrict the movement of said remote point to movement in a regular substantially vertical arcuate path, and operating to control lateral movement of the arm at said point of connection with reference to the lateral movement imparted by the crank thereby tocause oscillation of the arm and link in suchwise that the lateral movement of the front end of said link, due to its oscillation, is opposite to the lateral movement imparted by the crank during downward movement of the crank and is in the same direction as the lateral movement imparted by the crank during upward movement of the crank whereby the resultant lateral movement imparted to the lay is less during downward movement of the crank than-during upward I movement of the crank.

' i. A lay motion for looms comprising the combination with an actuating crank, a loom lay and a pitman pivotally connected at its front end to the lay; of a substantially vertically disposed lever including a bearing'on each side thereof at one end portion and a single hearing at its opposite end portion, one of said first named bearings affording connection with the rear end of the pitman and the other of said first named bearings affording connection with the crank; and guiding means connected with the third of said bearings to restrict the movement of said third bearing to movement in a regular substantially vertical arcuate path, permitting said lever to move up and ,5.

down with the crank but limiting the lateral movement of the lever at said guiding means, whereby the horizontal portion of said lever is oscillated in suchwise that the lateral movement of its pitman connected end due to the oscillation is opposite to the lateral movement of the crank during one half of the crank cycle and is in the same direction as the lateral movement of the crank duiing the other half of the crank cycle.

5. A lay motion for looms comprising the combination with a loom frame, an actuating crank journalled inthe frame, a loom lay and a pitman pivotally connected at its front end to the lay; of a connecting link between the crank and the rear end of the pitman, said link including an extenfixed to the arch; a link pivoted at one end to s'ionpand an oscillatable link pivotally connected at one end at a fixed point on the loom frame and pivotally connected at the other end to said extension, to restrict the movement of said other end to movement in a regular substantially vertical arcuate path, the pivotal points of said members being so relatively positioned that the lay will beat back more than. half way during one quarter of the crank cycle and will beat back and forward less than half way during the succeeding two quarters of the crank cycle and will beat forward more than half way during the fourth quarter of the crank cycle whereby the lay is caused to dwell in substantially full open shed position during approximately one half of the crank cycle. 7

6. A lay motion for looms comprising the combination with a loom frame including an arch, a loom lay, an actuating crank and a pitman pivotally connected at its front end to the lay; of a link pivotally connected at its front end to the rear end of the pitman and operatively connected at its rear end with the crank; an arm extending upwardly from said link; a bracket fixed to the arch; a link pivoted at one end to the bracket and pivoted at the other end to the upper end portion of said arm, to restrict the movement of said other end to movement in a regular substantially vertical arcuate path, the pivotal points being so related that the lay is caused to dwell in the substantially full open shed position during approximately one-half of the cycle of crank rotation.

7. A lay motion for looms comprising the combination with a loom frame including an arch, a loom lay, an actuating crank and a pitman pivotally connected at its front end to the lay; of a link pivotally connected at its front end to the rear end of the pitman and operatively connected at its rear end with the crank; an arm extending upwardly from said link; a bracket the bracket and at its opposite end having a sliding connection with the upper end portion of said arm, to restrict the movement of said opposite end to movement in a regular substantially vertical arcuate path thereby to govern lateral movement of the upper end of said arm and angular relation of the pitman and link connected thereto in suchwise that the lay is caused to dwell in the substantially full open shed position during approximately one-half of the cycle of crank rotation.

8. A lay motion for looms comprising the combination with a loom frame, a loom lay, an actuating crank and a pitman pivotally connected at its front end to the lay; of a link pivotally con nected at its front end to the rear end of the pitman and operatively connected at its rear end to the crank; an arm depending from said link; a bracket fixed to the loom frame; a link pivoted at one end to the bracket and pivoted at the other end to the lower end portion of said depending arm to restrict the movement of said lower end portion to movement in a regular substantially vertical arcuate path, thereby to govern the lateral movement of the lower end of said arm and angular relation of the pitman and link connected thereto in suchwise that the lay is caused to dwell in the substantially full open shed position during approximately one-half of the cycle of crank rotation.

9. A lay motion for looms comprising the combination with a loom frame, a loom lay, an actuating crank, a pitman pivotally connected at its front end to the lay; of a link pivotally connected at its front end to the rear end ofthe pitman and operatively connected at its rear end with the crank; and means connected tosaid link and movably supported at a fixed point to restrict the movement of a portion of said link to movement in a regular substantially vertical arcuate path for'establishing different angular relations of the link and pitman in different parts of the crank cycle in suchwisethat movement imparted by the 'cranlnis alternately increased and decreased in process of transmission through the link and pitman to the lay, whereby the lay is moved back approximately two-thirds of its travel during the first quadrant of crank movement andback the remaining third of its travel" during the succeeding quadrant of crank movement and is moved forward through approximately one-third of its travel during the third quadrant of crank movement and forward approximately two-thirds of its travel during the final quadrant of crank movement.

10. In a lay motion for looms, the combination with a loom lay and an actuating crank therefor, of a bell-crank lever mounted intermediate its ends on said crank, and adapted to be moved vertically and laterally upon rotation of the crank, a link pivotally connected at one end with said lay and at the other end with one end of said bell-crank lever and means connected with the opposite end of said bell-crank lever to restrict the movement of said opposite end to movement in a regular substantially vertical arcuate path governing lateral movement thereof with reference to the lateral movement imparted by the crank in suchwise that the bell-crank lever is oscillated by the crank and operates to move the link and lay alternately toward and away from the crank whereby the resultant movement causes the lay to dwell in the substantially full open shed position during approximately onehalf of the cycle. of crank movement.-

11. In a lay motion for looms, the combination with a loom lay and an actuating crank therefor, of an articulated driving connection between the lay and crank and means to vary the .efiective length of said driving connection, comprising a controlling arm rigidly connected at one end to a member of said articulated driving connection and a radius link pivotally mounted at one end at a fixed anchor point located at the opposite side of said controlling arm from the lay and pivotally connected at its free end to the free end of said controlling arm, the said free end of said radius link being movable in a regular substantially vertical arcuate path.

12. In a lay motion for looms, the combination with a loom lay and an actuating crank therefor, of an articulated driving connection between the lay and crank, and means to vary the effective length of said driving connection, comprising a controlling arm rigidlyconnected at one end to a member of said articulated driving connection and a radius link pivotally mounted at one end at a fixed anchor point and pivotally connected at its free end to the free end of said controlling arm, the said free end of said radius link being movable in a regular, substantially vertical arcuate path, said anchor pivot being so located with reference to the controlling arm that it will limit toggle operatively connected at itsends with and constituting a driving connection between said lay and said crank, an oscillatable toggle arm rigidly connected at one end to a member of said toggle, and means operatively connected with the free end of said toggle controlling arm to restrict the movement of said end'produced by the actuationof said crank and toggle mechanism to movement in a regular substantially vertical arouate path, to thereby govern the amplitude of its lateral movement without substantially effecting its vertical movement, whereby there is effected a folding and unfolding of said toggle in alternate quadrants of crank movement with the imparting to the said lay during prearranged time periods of the crank cycle of a lateral movement greater than the lateral movement of the crank during said time period.

14. In a lay motion for looms, the combination with a loom lay and an actuating crank therefore, of an articulated driving connection between the lay and crank shaft comprising a pair of links arranged end to end and pivotally connected together at adjacent ends and connected at their remote ends to the lay and crank respectively, a controlling arm connected at one end to said crank connected link, and means having one end movably connected to a fixed point and its other end, movable in aregular substantially vertical arcuate path, operatively connected to the opposite end of said controlling arm.

WILLIAM H. BAKER.

Images