US1711595A - Loom dobby - Google Patents

Description

A. A. GORDON MayL 7, 1929.

LOOM DOBBY Filed July 5, 1927 3 Sheets-Sheet l 1 'ummm May 7, 1929- A. A. GDON 1,711,595

` LOOM DOBBY Filed July 5, 1927 5 Sheets-Sheet v2 7266 64 as' ce 65 l@ A/m ,4 @mi amg/s Patented May 7,1929.

UNITED STATES PATENTOFFICE.

ALBERT A. CORDON, OE WORCESTER, MASSACHUSETTS, AsSreNoE To CEOMPTON a KNOWLES LOOM VJORKS, OF VORCESTER MASSACHUSETTS.v

LOOM DOBBY.

Application filed July 5,

weaving names inselvages.

My prior Patent No. 1,060,977k shows adobby mechanism such as has gone into general use for the weaving of names in the selvages of cloth. The dobby shown in said patent is used in addition to the ordinary shedding mechanism and operates with a multiplier which holds the name dobby inactive for a given number of picks, the dobby operating the required length of time to weave the selected name and thenbeing inactive until rthe name is again tobe woven.

A dobby made according to my aforesaid patent makes no provision for incorporating the Warp threads controlled thereby into the Cloth during the time that the name dobby is idle and as a result these warps float from one name to the next and must be cut ott before the cloth is ready for the market. It is the general object of my present kinvention to improve my former name dobby so that the warp threads may be attached to the cloth between the names and thus avoidv to `provide an auxiliary pattern surface made `up of a plurality of disks having cam faces to operate the Corresponding hooks and all of said disks being assembled for rotation in unison to cause the dobby to weave a regular pattern between the names.

lnasi'nuch as the auxiliary surface andthe main pattern surface both are zble to control the hooks it is necessary to provide means whereby each pattern surface when at rest shall not interfere with thecontrol of the hooks by the other pat-tern surface. In thel auxiliary surfaceV I accomplish rthis result; by so assembling the disks that a region of the pattern surface extending alongr its length will be blank and this blank surface 1927. sei-iai No. 203,417.

will be presented tothe auxiliary controls for the hooks when the main pattern surface is active.

"With these and other vobjects in view which will appear as the description' pro- MASSACHUSETTS, A COEPORATIONOE ceeds,'my invention resides.. in the combination and arrangement of parts hereinafter described and set forth in the claims.

, In the accompanying drawings, wherein I have shown a convenient embodiment of my invention, l f

F g. 1 is a central vertical section through my'improved dobby showing the parts in position for weaving names,

Fig. 2 is Aan-end elevation looking in the direction of arrow 2, Fig. 1, said parts being shown in section forthe'sake of clearness,

` Fig. 3 is arview showing part-s of the structure looking in the direction of arrow 3, Fig. 2,

F ig.v 4 isan enlargedvertical section on line 1 -t of Fig. 1,

Fig. 5 is a fragmentary enlarged detailed vertical section on line 5-5 of Fig. 1

n a Figs. 6 and 7 are 'perspective views of the disks used for the auxiliary lpattern surface, l

Fig. 8 isa top plan view of a portion of a fabric showing a name in theselvage such as might be woven by the dobby, V

Fig. 9 is a vertical section on line 9-9 of Fig. 8 showing the manner' of attachingthe wa-rps forming the name to the fabric be-v tween names, and,

F ig.v10 is a diagram showing the arrangelment of the cam facesonthe auxiliary pattern surface. f f Y Referring particularly to Figs; 1 and 2 it will be seen that I haveprovided a stand 10 which ordinarilyis secured to the loom arch 11 in a position to locatethe dobby over one of the Selvagesofthe fabric being woven. The dobby comprises a frame 12 on which is rotatably mounted a pattern cylinder 13 having a chain llpreferably of the so-called double index type. A ratchet 15 is secured to the shaft 16 to which the cylinder '13 is operates With a. controller 21see Fig. 3, and

during thenormal rocking of armi 19 the lever 22 rocking about a fired center 23 and having a depending finger 2lito cooperate with a multiplying mechanism. As shown herein said mechanism comprises two multiplying chains and 2(3,- respectively, said 'chains being of dillerent lengths and heilig formed ot links of the forni set forth in Figs. 2 and 3. Said chains are mounted on a eyliuder 27 which is rigid with a ratchet' 28 receiving Vperiodic movements 'from a depending pawl 2S) when the main chain is inactive and the cylinder 13 is at rest.

The chains 25 and 26 are each made up oi high links and one low link and when both the low links come under the finger 211 the i lever 22 will Vhave a left hand movement as viewed in Fig. 3; At all other times during the rotation of said chains the high links on one or both of said chains will hold. the finger to the lett las viewed in Fig. 3 and will therefore operate through the controller 21 to hold the pawl 17 out of operative p0- sition with respect to the ratchet which drives the main cylinder' and chain.

rl'he pawl 29 which drives the multiplier chains 25 and 26 is controlled from the main chain 141 through a lever 30 pivoted to move about the liXed center 23. Said lever 30 has a portion 31 to be raised by a clip 32 on the chain 14, the raising et said end 31 acting` to move the arm 33 to the right as viewed in Fig'. Said arm controls the position et the pawl 29 and when the arm is in the position shown in Fig. 3 the pawl 29 will be operatively disposed with respectrto the ratchet 23 which controls the multiplier chains 25 and 2G. i 1When clip 32 is not under the portion 31 spring acts to pull the arm to the left and thus to move the pawl 29 to the` lett. 'Said pawl is weighted as at 35 and the lower end thereot tends normally to vinove to the right as shown in Fig. 3 because ot the weight 35,

T he pattern chain 111 cooperates with dobby lingers 3G and 37 which are raised and lowered Vby the pegs 3S on the chainwhen the cylinder 13 is rotating. The lingers 36 control lifter wires 39 which position an'upper set ot hooks fi() while the lingers 37`have direct contact with the lower set oit' hooks al. Said hooks are pivoted in pairs to dobby back levers ll2 which inturn are pivoted to rocking levers moving` about a fixed' guide i9 and extend down to theselvage or warp threads which are to be controlled by the dobby.`

in order to give motion to the hooks there is provided a pair ot reciprocating knife bars 50 and 51 located respectively on opposite sides ot the shaft 52 on which the arnr 19V l ing stroke to the left while the lower har 51.

will have its return ornon-workingr stroke to the right. Said hars 5() and are pesitioned to engage the hooks which are in low Vposition and serve to move the dohby back levers l2 and consequently the jacks and harness cords according to the `call et the main pattern surface 15% when the cyl* inder 13 is active. The mattei' thus Ylar described may be the same. as set forth in my aforesaid Patent No. 1,060,977.

As previously stated a dohby constructed as previously descrilied makes no provision for weaving' the warp threads into theselvage or other part of the cloth between the names and it is the principalv object oit my present invention to all'ord Van auxiliary pattern surface which can be brought into action when the main pattern chain 11i is to come to rest after wea-ving the name.

Accordingly., in carrying' .my invention into effect, l extend the traine 12 upwardly as shown clearly in TFigs. 1 and 2 to provide supports 60 in which is rotatably mounted a shaft 61. Said shaft has securedthereto an actuator ratchet' 62 hy n'ieans et which the shaft may be given periodic angular motion every second pick oll the loom when the main cha-in is at re. Mounted on that part ot the shaft 61 whit-,li lies intermediate bearings V63 is a plurality of disks, said Clisi-:s being oi two forms, one of which is illustrated particularly at (ist in Fig. 6 as hai/'ing a cam riser surface 65 and a plurality of openings GG concentric with the central opening 67 through which the shaft 61 extends. rthe other form et' disk is similar to that shown at 63 in 7 andhas no riser cam portion (35, and disks 68 separating the cam, disks.

The manner et securing the disks in lined angular position on the shaft 61 is shown in Figs. 2 and 5. `EachV end ot the auxiliary pattern surface is secured to the shaft 61 in the saine manner, only one'end being shown in section in the drawings. 'lhe sha'lt is provided with a keyA way G9 to receive a key 7 O having a head 71, the heads entering a notchin the outermost disk 68 adjacent the bearing 63. A rod 72 entends through thealigning openings 66 of disks Git and openings 66 of disks 68 and in this Fig. 1 tohave engagement with the upperI ends of certain of the hook controlling wires.

' As shown more particularly in Figs. 1, 2 and 4 said lever-S73 lie vertically over the ends of the lifter rods 39 which cooperate with fingers 36 to determine the position of the upper set of hooks 40. Asv shown particularly in Fig. f1 each lifter rod 39 extends up Wardly from the fingers 36 and is offset as at 76 to form a support forone of the top hooks 40, the upper end of each rod 39 being bent back slightly so` as to lie under thecorresponding depressor lever 7 3. In this way the levers 73l as well'as the fingers 36 control the lifter wires and consequently `the upper hooks 110.v The relation of the lifter rods and spacer 79 is shown more clearly in Fig. 1 where it will be seen that retaining lrods 8O andv82 serve lto prevent accidental displacement of the rods. It is to be understood that there are as many top hooks 40 as there are depressor levers 73, there being one depressor lever and one cam disk v64 on the shaft 61 for each upper hook 40.

A pawl 83 is pivoted on the stud 18 and is held against an adjusting screw 84El supported by the weighted end 35 of pawl 29 by a'ltorsion" spring 85 which surrounds the stud1'8 as shown in Fig. 2. The screw 84 is so placed that the pawl 83 can actuate the ratchet 62 when the pawl 29 is in operative relation with the ratchet 28 and the pawl 17 is out of operative position with respect to the ratchet 15.

In assembling the disks on the shaft 61 it is possible to provide for several different weaves, butI have shown diagrammatically in Fig. 1() one particular arrangement which has operated successfully in actual practice. According to this arrangement twelve warp threads are controlled through a repeat of sixteen picks of the loom. The lines W represent the warp threads and the lines I indicateV the picks of the loom, the lines vW also representing the several cam disks. T he cam portions C are indicatedas locatedone on each line W, there being one disk for each warp thread,and in the particular draft shown herein there are two cams C for each alternate pick except one, namely that corresponding to the fourth pick of the repeat which has only one cam. rlhe last of the alternatev picks, indicated by liney -16- is blankfand has no cams. The end view of the auxiliary pattern surface as shown clearly in Fig. 1 indicates this blank space extending along the length of the pattern surface as indicated at 86.

The depressor levers 73 are provided with vsor. levers 73.

runs 87 ywhich cooperate with the disk cams 64tand are depressed by the latter. vTwelve cam disks are shown herein with their cam portions arranged as .indicated in Fig. 10,

and as the shaft 61 rotates the sheds will be V- formed in the succession described, the Warp threads being raised and lowered ,onv the various picks. 'On the movement of the auxiliary surface for each repeat, however, the

blank space 86 will come over the runs 87 and no' shed will be formed. n

`.A brief description of the operation. of the device will illustrate the necessity of having the blank space 86 and will indicateV also why a corresponding blank space must be left on the main pattern surface. In operation, .when the name 1s being woven,

pawl 17 will move cylinder 13 every second pick of the loom so that a new bar on the pattern chain 14 will be brought under the lingers 36 and37 on alternate picks of the loom. Each chain baris pegged so that during the weaving of the name the proper sheds will be formed to spell the name, but

when the last pegged bar corresponding to the last two picks in the name is reached a l blank chain bar indicated at 88 in Fig. 1 will appear under the fingers.v This blank bar comes under the dobby fingers 36 and 37 at the same timeV that clip` 32 arrives under lever 3() so that pawl 29' will lbe broughtv into action with respect to the multiplier by that stroke of pawl 1-7 which brings the blank ybar 88 under vthe fingers. On the next ldownward stroke, therefore, without the loss' of a pick7 pawl 29 will actuate the multiplier 'and pawl 83 acting through the ratchet 62l will impartan angular movement to the auxiliary'pattern surface `formed by the disks on shaft 61.

During the time that the fingers and 37 arebein r raised'andlowered by the pegs on the pattern chain 14 the blank space 86 surface will be free to control the hooks be-y cause of the fact that the lingers are not being acted upon by any'pegs, bar 88 being unpegged as previously stated. On every alternate pick of the loom after bar 88 comes under the fingers the disks will be gii'f'en a new angular' position to bring another set of the cam disks 65 into controlling position with respect to their corresponding depres- As described previously in connection -wthF ig. 3 when the pawl 17 is moved. out

The disks will continue to main cylinder is inactive.

of action and pawl 20 operates to move the multiplier' cylinder 2T the high links on the chains and 26 will hold the shoe 24 of the lever 22 to the left as viewed in Fig.

V3 and said shoe will be held in this positive position with respect to the `ratchet 15 so that on the next upward movement of the pawl 17 the clip 32 will be moved from under lever and spring 3/1 will move the pawl 29 away from the multiplier ratchet and will also move the pawl 83 away from the auxiliary `pattern. surface ratchet 62. The auxiliary surface will ,thereafter be inactive until again called.

ln designing the auxiliary pattern surface and the two multiplier chains 2o and 26 it should be borne in mind that the multiplier should controlthe mechanism for a number of picks which is a multiple of the number of angular spaces around the periphery of the auxiliary pattern surface. As shown herein eight movements of the `auxiliary pattern surface are necessary to complet-e a revolution thereof, this motion corresponding to sixteen picks and the multiplier chains 25 and 26 should therefore be of such lengths that their multiplying interval will be a multiple of sixteen picks.

VThe chain 25, for instance, may have thirteen links while chain 2G may be provided with sixteen links, such a combination providing' a multiplying interval corresponding 50416 picks between names.

In 8 l have illustrated one naine which can be woven by the dobby described herein, the name being indicated at 100 and the intervening space between names being designated at 101. As previously stated the warp threads 102l which form the naine were required to fioat in the form of dobby set forth in my aforesaid patent, but by means of the structure set forth herein these warp threads can be attached to the fabric and made a part thereof by the auX- iliary pattern surface. Each of the warp threads isrconnected to the fabric at regular intervals letween the names at point-s designated at 103 and these points may be arranged in any desiredA form, depending upon the arrangement of disksv (Set. Reference to Fig. 9 will show that the warp threads 102 lioat for a plurality of picks, iifteen as set forth herein and shown at 104, and-then is woven into the-fabric for a single pick.

The warp threads are attached to the fabric by one pick` only, and not two, as might be supposed from the fact that the depressor levers 73 and hooks 410 are held down for two picks. The reason for this is that although the hooks are held down for two picks, yet the knives and 51 reyquire tivo picks to complete their movements. lf knife 50 moves to the left immediately after a hook 40 falls the latter will be drawn out on that pick but will be inactive on the following pick, and likewise, if the knife has a workin(T stroke the pick after the hook falls, said hook is inc :tive on the first pick.- Because ofthe fact that the warns are riiised for one pick only at a time Jthey vcan scarcely be seen from the top ot' the fabric being,l woven, although being tightly boundthereto.

From the foregoing it will be seen that lhave provided an improved form of name dobby wherein the warp threads controlled by the name dobby are incorporated into the fabric by the operation of an auxiliary )attern surface each thread beine` woven into the fabric at regular intervals. It is to be understood lthat other forms of the disks than that shown in Fig. 6 may be employed to give a greater or lesser' number of picks te each revolution of the auxiliary pattern surface and that the sequence in which the depressor levers 73 are actuated may be varied to give a limited variety of ways of weaving the warp threads into the selvagge. lhile I have presented the invention as being a name dobby to control selvagge threads' yet l do not wish to be limited to this application of the invention as the strl'ictiilre set forth herein may be einployed to weave simple figuresV in thc body of Athe fabric and is not necessarily Vlimited to the weaving;v of a name the selvagge. i

Having thus described my invention it will be apparent 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 l do not wish to be 'limited to the details herein disclosed, but what I claim is:

1 In av pattern mechanism for operating upon selected warp threads to be incorporated into afabric, means operative at predetermined times only to incorporate the selected threads into the fabric to form a figured pattern at spaced intervals, and auX- iliary mechanism operative when the means are inoperative to attach the selected warp threads to the fabric at periodic points between the Vfigured part of the fabric.

2. In a pattern mechanism for operating upon selected warp threads to be woven into a fabric, a main pattern surface, means cooperating therewith to incorporate the threads into the fabric to produce a fancy pattern, mechanism to render said means tive to produce a change in the position of the corresponding selected thread,the thread corresponding tothe cani portion of 1 each disk being incorporated into the fabric When said cam portion reaches a predetermined point in the revolution of the auxiliary pattern surface.

l1. In a pattern mechanism for operating upon selected Warp threads to be Woven into affabric, a main pattern surface effective to cooperate with the threads to incorporate the same into the fabric during the Weaving of a portion of the latter to produce a fancy pattern, an auxiliary pattern surface effective to attach the warp threads to the fabric at spaced points duringthe Weaving of another portion of the pattern, said auxiliary pattern surface including a plurality of disks arranged along a common axis, each disk having a plurality of equally spaced openings therein concentric With the axis, a retaining'rod to pass through one hole of each disk and holdsaid disks in fixed angular position, each disk having a cam portion effective to incorporate the correspondingthread into the fabric when the cam portion reaches a predetermined point in the revolution of the auxiliary pattern surface.

l2. In a pattern mechanism for operating upon selected Warp threads to be Woven into a fabric, a main pattern surface effective to incorporate the threads into aportion of the fabric to cause a fancy pattern, a multiplier element, an auxiliary pattern surfaceeifective to incorporate each thread into the fabric at regular intervals during the Weaving of another portion of the fabric, an oscillating member, and actuating members carried thereby for the main pattern surface,

the multiplying element and the auxiliaryV pattern surface, the actuating elements for the auxiliary pattern surface and the multiplier .being alternately operative Withthe a fabric, a main pattern chain to incorporate the warp threads into a portion of the fabric to produce a fancy weave, an auxiliary pattern surface effectiveto incorporate each VWarp thread into another portion of the fabric at regular intervals, a multiplying element, and means to render said multiplying element and auxiliary pattern surface operative during` the Weaving of said other portion of the fabric While the main pattern chain is inactive, said means acting` to cause the main pattern chain to be active with the auxiliary pattern surface and the multiplying element inactive during the Weaving of the first-named portion of the fabric.

14. A pattern indicating element for controlling a loom shedding mechanism comprising a flat disk of uniform thickness having a central bore, a plurality of openings on a circle concentric with the bore, said element having a periphery the greater part of which is substantially circular, and an indicatingl cam formed With the element and havingl a face continuous with the said circular face.

A pattern indicating` element for con! lco

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