US2929411A - Pick and pick automatic loom - Google Patents

Pick and pick automatic loom Download PDF

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Publication number
US2929411A
US2929411A US625788A US62578856A US2929411A US 2929411 A US2929411 A US 2929411A US 625788 A US625788 A US 625788A US 62578856 A US62578856 A US 62578856A US 2929411 A US2929411 A US 2929411A
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Prior art keywords
box
shuttle
loom
boxes
lever
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US625788A
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English (en)
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William E Kimmel
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Crompton and Knowles Corp
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Crompton and Knowles Corp
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Priority to CH5328357A priority patent/CH383287A/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D43/00—Looms with change-boxes
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D45/00—Looms with automatic weft replenishment
    • D03D45/34—Shuttle changing

Definitions

  • This' inventionI relates vto improvements in two-color weft replenishing pick and pick looms and it is the general object of the invention to provide a loom of this.
  • top box at the magazine end of the loom detachable it is possible not only to accommodate at that end of the loom a temporarily idle shuttle for weava be approximately half shifted at front center, but the single top box will be moved more quickly and will reach the transfer station of the magazine when the lay is at front center.
  • the gap or space opened up below the top box and above the bottom gang is therefore amply large for the outgoing bobbin and is due not only to the larger motion which the single top box has but also to the fact that it moves at a faster rate than the boxes below it.
  • auxiliary or secondary box shifting mechanism connected only to the top box.
  • This auxiliary mechanism is ordinarily inactive with respect to the top box and is called intoaction onlyon those picks or beats of the loom when replenishment is required. On .such beats the subgang below the top box will be shifted by a primary shifting mechanism which on nonreplenishing beats of the loom will shift all of the boxes at the maga- Y zine end in unison as though'they 'werea singlcunit.
  • warp shed and it is a further object to accomplish this result by a thread cutter normally in noncutting position but moved to cutting position due to the differential motion of the top box with respect to the subgang on weft replenishing beats of the loom.
  • the cutter is provided with two cooperating parts one of which is on the singlerbox and the other of whichA is on the subgang.
  • a further object of the invention is to provide a shuttle box construction having two box members lone of which is movable independently of the other and wherein the two members have cooperating guide meansto keep the members aligned.
  • the previously-mentioned top box is supported on rods .or the like which pass through guides mounted on the. subgang and the shuttle binders for the boxes are betweenl the shuttles in the boxes and the guide means.
  • the shift from the Second box to the third box,V is a regular one box shift.
  • Fig. 1 is a front elevation, parts being broken away and parts being in Section, of @109m having the preferred, forni of ythe invention applied thereto,
  • Fig. 5 is a detailed side elevation, parts being broken away, on a reduced scale looking in the direction otv arrow 5, Fig. 4,
  • Fig. 6 is a detailed vertical section on line 6 6, Fig.
  • Fig. 7 is a view partly in section, of one of the electric switches used with the invention.
  • Fig. 8 is a fragmentary detailed view looking inY direction of arrow 8, Fig. 7, parts being omitted,
  • Fig. 9 is a plan view'partly in section of an enlarged scale looking in the direction of arrow 9, Fig. l, l
  • Fig. l() is a detailed enlarged side elevation, parts in section, looking in the direction of arrow 10, Fig. l,
  • Fig. ll is aplan view looking in thedirection of ar ⁇ row 1 1, Fig. 4, certain of the parts being in section
  • Fig. l2 is a detailed side 4elevation looking in the diinfection of arrow 12, Fig. 11, showing the thread cutter mechanism in its normal noncutting position
  • Fig, 13 is an enlarged horizontal section on line 13-13, Fig. 2', showing part of the thread Vcontrol used with the invention, t
  • Fig. l4' is a diagrammatic plan viewindicating the control for the thread of the outgoing bobbin
  • Fig. 15 is another diagramar'ntic view showing the contirol for the thread of the incoming bobbin
  • Fig. 16 isv a diagrammatic view similar to a part of the AFig. 2y but showing ⁇ the'top boxraised to the transfer 'Siatin to provide .a Space under it for the outgoing hobbn,
  • Fig.y 1,7 ⁇ i's a diagrammatic view showing asequence ofv Z4; 'successivefshuttle box positions'operating according to th'epresent invention, this figure representing only one example of a number of different sequences.- which can heused: y Y
  • Fig. 18 shows a sequence of position for the shuttle Y boxesin two successive beats rof, the loom, eachr box being for one of the well-known quarter center positions of the Fig. l'9 is a 'diagram showing vthe pattern chain lfor controlling the several parts of the loom, including ⁇ the shuttle picking sequenceshown i'nFig. 17,
  • Fig. 20 is an enlargedview of 'part' of the ⁇ mechanism shown inthe upper left-hand part of Fig. l and Vshowing the preferred ⁇ form of the primary box' shifting mechan ism forv the shuttle boxes at the-right-hand endVV ofthe loom asviewed idF-ig. l,
  • Eig, Z1 is, a. bracketed view showing certain of. ⁇ the lever-soi- Fig; 2,0 diagrammatic-ally1 andvin theA three- ⁇ relativgepositions which they assume to place, thejthree boxes at the magazine endoi the loom'in active po sition, l
  • Fig. 2.27 is a fragmentary diagramrof a QQX- ⁇ Chain' fOr it11ingthelevers-shown in Fig. 21,
  • Fig. 24 is a view similar to Fig. 22 but shows a chain for the modified form of box mechanism shown in Fig. 23,
  • Fig. 25 is a 'diagram of an electric circuit which can be used in connection with the invention.
  • Fig. 26 is a fragmentary view of the upper left-hand part of Fig. l, showing the timer switch and drive therefor used in conjunction with the electric circuit of Fig. 25.
  • the loom has a stationary frame 1, a lay 2 which passes through the usual quarter center positions, that is, bottom, front, top and back center positions foreach beat of the loom, a
  • control mechanism generally indicated at K of the welh known Knowles type, a lll-Stack stationary magazine. M. and a bottor'nV shaft' 3 which complete a rotation thereof every second beat of the loir ,116 lett-hand end of the lay is provided with ay gang LG of fouryertically aligned shuttle box cells which move as a unit in wellknown manner controlled by box levers 4 and S ot'. usual operation and construction.
  • Each sideof the loom is provided with a picker shaft 6 operatively connected to its corresponding picker stick 7 and a cam 8 for each shaft is actuated by one or another of the pairs of picking balls 9v mounted to slide along but rotate with the shaft 3.
  • This is a type of selector picking mechanism which .has come into use in ,the type of loom to which the present invention relates. but other forms of selector :picking mechanism can be used,if desired. Such mechanisms should be able to' pick a shuttle from either end ofthe loom on any beat of the loom'.
  • a link lit causes the right and left-hand pairs of picking rolls 9" to move in unison under control of a vertical rod 1.1 connectedto ⁇ a lever 12 ⁇ under control of column g of the pattern chain' generally indicated at C and shown diagrammatically in Fig. 19' and applied to the loom in Fig. 1.
  • the magazine ijs' providedwitha 'transferer' arm which in the present instance is Somewhat'different from the usual Vtransferer arm in Vthe ijr'iann'erA in whichI the operating force is applied toit.
  • the picking mechanism will act on every beat of the loom to pick a shuttle from either the right or the left-hand end of the lay when the latter is approximately on its top center position and the shuttle will continue in flight across the lay as the latter moves through its back center position and until the lay reaches approximately its bottom center position, at which time the shuttle will be boxed.
  • the lay then continues to its front center position where a bobbin transfer, if previously called, will occur and continued motion of the lay will return it to its next top center position for the next picking operation.
  • the positions of the boxes and shuttles as shown in Fig. 17 are those which occur when the layis approximately in its back center position after the boxes have come to rest with Vrespect to the lay after' their shifting movements.
  • An important feature of the invention is the shuttle box structure at the magazine end of the loom, this structure being made in two members or parts, the upper of which is a single shuttle box 45 and the lower of which is a subgang 46, having upper and lower cells or boxes 47 and 48 respectively permanently united and moving together.
  • the lower member 46 is guided in usual manner by the outer and inner vertical guides 49 and 50 respectively secured to the layend 30.
  • the upper member 45 is guided to some extent, but not exclusively, by guides 49 and 50.
  • Primary and secondary box shifting mechanisms are used for the boxes at the magazine end, the primary mechanism being connected to the subgang 46 and the secondary or auxiliary mechanism being for the top box 45.
  • a bobbin deector 51 is secured to the top of the subgang 46 in fixed relationship thereto by means including the usual pin 5?.
  • This deector 51 is curved upwardlyand rearwardly and rests against an upper extension 55 of the back 56 of the subgang.
  • the oor 57 of the top box 45 rests on this extension 55 and is partly supported by it. The distance between the oor 57.
  • the top 58of the subgang is considerably less than the center to center distance of the boxes 47 and 48 and since during the greater part of the operation of the loom the three boxes 45, 47 and 4S shift vertically as a unit the usual type of box shifting mechanism cannot be used for the subgang 46 but must be modied due to the fact that a vertical shift or" the three boxes as a unit from its lowest position to the position in which box 47 will be in active picking position aligned with the lay is appreciably more than a one-box shift but not nearly as much as a two-box shift.
  • the amount of shift is of the usual kind, that is, a one-box shift.
  • levers 6@ and 61 Located behind the previously described box lifter levers 4 andA 5 for gang LG are levers 6@ and 61 forming parts of the preferred form of primary box lifter mechanism.
  • Lever 60 is rockable at its lower end about a fixed axis 62 around which lever 4 turns and lever 61 is rockable intermediate its ends about a fixed axis 63 around which lever 5 turns.
  • levers 60 and 61 are connected togtheir vibrator gear connectors 42a and 42b respectively.v These connectors 42a and 42b will have the usual amount of motion derived from the turning of their corresponding vibrator gears so that the upper ends of the levers 60 and 61 will move through their usual distances.
  • Lever 60 is provided with a stud 65 on which is rotatably mounted a chain sprocket wheel 66 around which is trained a box lifting chain 67 an end of which as shown in Fig. ⁇ 20 is secured in fixed position to a cross bar 63 forming part of the usual mechanism K.
  • the chain- 67 is trained around a second sprocket wheel 69 rotatable on the lower arm 73 of lever 61 and then extends to the left and is trained over a small guide pulley 70 and thence in usual manner as indicated in Fig. 1 to the opposite side of the loom where it is trained around a second guide pulley 71 and thence downwardly and operatively connected to a box lifter rod 72 the upper end of which is secured to the bottom plate 52 of box 48 as shown in Fig. 4.
  • the lever 61 has the upper part thereof formed in usual manner and is provided with a vertically adjustable bar 75 for attachment to the vibrator gear connector 42b, but the lower arm 73 is somewhat longer than the corresponding arm of lever 5 part of which is broken away in Fig. 20.
  • lever 5 With further reference to lever 5, it has mounted rotatably thereon the usual sprocket wheel 76 around which is trained box lifter chain 77, one end of which is connected directly to lever 4 and the other end i of which is connected operatively to box gang LG under the mechanism K in usual manner.
  • FIG. 21 The operation of the box shifting mechanism for the boxes at the right-hand or replenishing end of the loom is shown diagrammatically in Fig. 21, positions IP, HP and IIIP.
  • position ,IP the lifter chain 67 causes the top shuttle box 45 to be in active shuttle receiving position to receive a shuttle picked from gang LG.
  • the bobbin do ector 51 and the two boxes below it are all below active shuttle receiving position.
  • the lifter chain 67 When it is desired to lift box 47 to active position the lifter chain 67 must be moved a distance equal to the center to center distance of boxes 45 and 47 when the boxes areas shown in Fig. 3. This distance is greater than the height of one box but less than twice the height of a box. It is because of this unusual amount of shift that the ordinary box motioncannot be used.
  • the height of a shuttle box is usually 1% inches.
  • the distance between boxes 45 and 47 that is, the space occupied by the bobbin deiiector, is 3A of an inch, to mention the distance actually used in one form of the invention.
  • the lifter chain must therefore be pulled a distance equal to 21/2 inches. This is accomplished by shifting lever 60 from the position shown in IP to the position shown in IIP, keeping the lever 61 stationary.
  • the axis of sprocket wheel 66 is so located on lever 60 that as the latter moves from its end position of IP to its end position of IIP the lifter chain will exert an upward force on the subgang 46 which will locate box 47 in active position.
  • Fig. 22 shows diagrammatically the manner in which ⁇ those parts of the box pattern chain assigned to boxesv sessel-f 45, 47 and 48 would be built.
  • the second or modiiied box shifting mechanism is shown diagrammatically in Fig. 23.
  • the levers 60a and 61a are more nearly like levers 4 and 5 than are the levers 6i) and 61 and a structural View is not believed to be necessary.
  • lever 60a is the same as lever 4, that is, the lifter chain is connected directly to it and when shifting from its end position in 1M to its end position in IHM it produces a one box shift.
  • Lever'61a differs from lever in that its lower arm 73a is shorter so that when lever 61a shifts from its end position shown in IM to its end position shown in IHM it produces a lift equal to one box plus the distance between boxes 45 ⁇ and 47;
  • levers 69a and 61a When levers 69a and 61a are as shown in IM of Fig. 23 box 45 will be active. To lift box 47 to active position lever 61a is swung to the position shown in IIM, thus producing a lift, to refer to the previous example, of 21/2 inches. To lift box 48 to active position lever 61a remains as in IIM but lever 60a shifts as indicated in HIM. This will cause a one box shift beyond the shift caused by lever 61a.
  • the modified form may appear to be simpler than the preferred form, but it requires a change from standard practice in building the box pattern chain.
  • box 45 would be called byy two low rolls on the pattern chain, but to call box 47 the high and low rolls would be reversed from their position in Fig. 22, and in order to call box 48 two high rolls would need to be under the Vibrator levers corresponding to connectors 42a and 4211.
  • box lifter arrangements shown in Figs. 21 and 23 are two examples of forms of mechanisms for lifting the boxes at the magazine end for nonreplenishing beats, but the invention is not necessarily limited ⁇ to these two forms.
  • box lifter chain 67 The connections between box lifter chain 67 and the subgang 46 are shown in Figs. l, 4 and 5.
  • the rocker shaft Si) which vsupports the lay has secured thereto a spring 135 has its right-hand end, see Fig. 5, connected rocker iron 81 of more or less usual form.
  • the box lifter rod 72 is secured to and depends from the subgang 46 and passes through a sleeve 83 sliidable in a lateral and exerts an upward force on the subgang which is limited -by engagement of a stop collar 86 on the bottom of the rod with the lower end of the sleeve.
  • the chain 67 is connected by a short rod 87 to a lug 83 at the top of the sleeve.
  • top box 45 and the secondary box shifting mechanisrn for operating it are shownin Figs. l, 3, 4 and 5.
  • Right and left-hand tonguesl 92 and 93 of* box 45 fit into the box guides 49 and 50"respectively, as shown in Fig. 4.
  • the top 94 and bottomS ofV box 45 are extended forwardly, to the rightV in Fig. 3, and are joined by'a pin 951er a shuttlebinder 96'.
  • Right and left-handl lifter and guiderods 9.7 and 98 respectively, Fig. 4; are
  • the subgang 46 has secured thereto right and left tubular guides 100and 101 through which the rods 97 and 9S respectively slide.
  • the lowerends of rods 97 and 98 are secured by nuts 102 to a lifter bar 103'which is forward of the layend B, see Figs. 3 and 4.
  • the lifter bar 163 has a vertical at body 104 and has at its top a horizontal flange .195 to which the rods 97 and 98 are fastened.
  • the bar ⁇ 193 is recessed at 106 to make room for the transfer latch 27 when the latter is raised to engage bunter 29.
  • a stud held in body 104 as shown in Fig. 5 passesthrough a rod head 111 on the upper endv of a -box lifter rod 112. Lateral arms 113 on the rod head support positioning screws 114 which press tightly against, flange 105 to tix the rod 112 with respect to the lifter bar 103.
  • Rod 112 passes downy through a sleeve- 115 and has a collar 116 secured to the lower end thereof to engage the bottom of the sleeve.
  • a compression spring 117 ⁇ around rod 112 between a collarV 112i fast on the rod and the top of sleeve holds the collar'116 up against the sleeve and transmits lifting force from the sleeve to the top box 45.
  • Sleeve 115 is slidable vertically in a laterally extending guide 121i on a carrier 121 secured to a plate 122 which in effect is a second rocker iron fastened at'123 to the r'nain rocker iron, see Fig.4.
  • a rodl 124 fast at its upper end with the layend 30 is surrounded by a push down compression spring 125 between a collar 126 and an arm 127 extending laterally from the upper part of sleeve 115.
  • a small guide 128 secured to guide 120 partly surrounds rod 124 to prevent' the latter from ⁇ moving back and forth with respect to upright 121. Since Vrod 124 passes through part 127 of sleeve 115'- the latter is prevented from turning. As viewed' in-Fig. 4, box
  • lifter rod 72 is behind box lifter rod 112, and rod 89 is to the right of rods 72 and 112 and behind rod 124. As seen in Fig. 5, box lifter rod 72 is to the right of box lifter rod 112 and behind rod S9.
  • Thehottorn of sleeve 115 has a lateral: arm 1 ⁇ 30-con'- nected to a chain 131which as shown in Fig. 5 extends upwardly and over a sprocket Wheel 132 and then down to a rod 133 anchored to a xed support 134.
  • the Vsprocket 132 is rotatable on a stud 137 on a plate 138 held at 139 to a'lever 140 rockable on a tixed stud 141.
  • This lever has alatch 142 pivoted to'it at 143 and formed with a hook 144 for engagement with the lifting arm 145 of an actuatorl or operator lever generally indicated at 146 also pivoted on stud 141, see Figs. 5 and 6.
  • Lever 140 has secured thereto a support 147 on which is mounted a solenoid 148 having a c'ore 149 to which is pivoted a pull rod 156 passing through a hole 151 in latch 142.
  • a compression spring 152 surrounding rod between lever 146 and latch 142 normally holds the latchv in the position shown in Fig. 6 against a stop screw 153 on lever 14() when the solenoid is 'deenergized
  • the solenoid When the solenoid is energized it pulls rod 150 to the left, Fig. 6, and a head 154 on rod 150 moves the .latch clockwise around its pivot in position to be raised by lifter arm 145.
  • Thel right-hand arm of lever 146 has a slot 161 therein for adjustment of a stud 162 on which a roll.163 rotates ⁇
  • Thevroll is held in engagement'with a cam 164 by a tension spring 165.
  • Cam 164 is secured to the bottom two pick shaft 3 .of the loom and rotates during. loom operation to give lever 146 a. complete reciprocating movement each beat ofthe loom.
  • Cam 164 turns Vcounterclockwise in the direction of arrow a', Fig. 5.-
  • the weft detector mechanism for determining the i condition of weft in the shuttles is located at the lefthand or head end of the loom as viewed in Fig. 1 and is shown more specifically in Fig. 9. Associated parts are shown in Figs. 7, l0, 19, 25 and 26.
  • a stand 175 secured to the loom frame 1 supports guides 176 and 177 between which moves a vertically reciprocating weft detector carrier 178.
  • a rod 179, Fig. 1 has its upper end 180 attached to the carrier 178 and itsV lower end 181 attached to a sleeve 182 operatively connected to a box lifterA rod 183 by the chain 77.
  • the rod 179 and carrier 178 rise and fall in unison with the rising and falling of shuttle box gang LG.
  • the carrier 178 has mounted thereon four weft detectors generally indicated at D1, D2, D3 and D4 for the shuttle boxes B1', B2', B3 and B4 respectively of gang LG. These detectors D1-D4 are all alike and only one will be described, namely, D1.
  • Detector D1 has a base 184 fixed to carrier 178.
  • a slide member 185 is mounted on the base for horizontal back andforth motion and has located thereon a weft detector nger 186 pivoted at 187.
  • a spring 188 intermediate the base 184 and slide member 185 urges the slide member rearwardly.
  • a set screw 190 on slide member 185 contacts stopscrew 191 on base 184 to limit rearward motion of the slide member.
  • Weft detector D1 operates in a well-known manner, that is, as the lay 2 approaches front center position, finger 186 will be moved forwardly with slide member 185 if there is sufficient weft on the bobbin. If, the bobbin is depleted of weft, finger 186 will move clockwise about pivot 187 thereby permitting contacts 192 and 193 to close to effect a change in loom operation. It will be understood that weft detectors D2, D3 and D4 operate in similar manner.
  • mechanism K has mounted thereon a selector switch generally indicated at MS having contacts 196, 197, 198 and 199 to coact with a switch closing Alever 201 pivoted at 202 on the casing 203.
  • a pair of contacts 204 and 205 see Figs. 8 and 25, coact with a switch closing lever 206 also pivoted at 202.
  • Levers 201 and 206 have depending therefrom connectors 207 and 208 respectively, the lower ends of the connectors being attached to their respective vibrator levers 41. Vibrator levers 41 and their respective connectors 207 and 208 are under control of the rolls on the pattern chain C as indicated at vertical columns e and f, Fig. 19.
  • switch MS The contacts 196-199 and contacts 204 and 205 of switch MS are under selective control to completeV a circuit to initiate a change in loom operation when any one of the shuttle boxes B1B4 is level with the shuttle race provided the bobbin that is at shuttle racev lever vis substantially depleted of weft and linger 186 moves clockwise to permit closing of contacts 192 and 193.
  • switchMS reference is made to Patent No. 2,592,126, issued to R. A. Donnan on April 18, 1952.
  • a stand 210 guides a rod head 211 for vertically reciprocating motion during loom operation.
  • Rod head 211 has connected as at 212 a depending rod 213 the lower end of which is pivoted as at 214 to a cam lever 215pivotally mounted on a stud 216 fixed to frame 1.
  • Lever 215 has an arm 217 which supports a cam roll 218.
  • a cam generally areas 223.
  • Rise and fall portions of the cam connect said areas to form a groove generally indicated at 224 for cooperation with roll 218.
  • Areas 221 are diametrically opposite each other as are areas 222, and areas 223.
  • Rod head 211 has pivotally mounted on its upper end at 226 a chopper pin lever 227.
  • the left-hand end of lever 227, Fig. 25, has pivotally attached thereto a rod 228 operatively connected at its upper end to the aforementioned color slide 17.
  • the right-hand end of lever 227 cooperates with a stationary pin 229 which limits the upwardmotion of the right-hand end of lever 227.
  • the stand y.210 V supports a bracket 230 to which is xed a casing 231 containing a solenoid 232 having a core 233.
  • a sliding pin 234 has its left end, Fig. 10, pivoted at 235 to core 233 and has its right end guided in hole 236 in stand 210.
  • a spring 237 interposed between stand 210 and 'core 233 normally keeps pin 234 out of the path of lever 227.
  • cam 220 moves lever 215 substantially as set forth in U.S.A. Patent application Ser.,No. 425,138, now U.S.A. Patent No. 2,781,792 tiled by Clifford Darwin and myself.
  • the detectors D1D4 are electrically connected by wires 240, 241, 242 and 243 respectively to wire 244.
  • Wire 244 has connected thereto a holding relay 245 and a switch blade 246.
  • a wire 247 having connected thereto a shipper switch SS extends to one side of the transformer T.
  • a wire 248 has connected thereto a switch blade 250 to coact with a contact 251 having a wire 252 connected to one side of the aforementioned solenoid 148, the other side of the latter having a wire 253 connected to previously mentioned solenoid 232.
  • a Wire 254 extends from solenoid 232 to a contact 255 to cooperate with switch blade 246.
  • Wire 248 has also connected thereto a switch.v
  • Blade 256 for engagement with contact 257 Von wire 258 extending to the previously referred to switch MS.
  • Blade 256 is under control of the rolls in column a of chain C, Fig. 19.
  • Switch blade 250 is under control of a cam 260 fast on a shaft 261 journaled for rotation on mechanism K, see Fig. l26.
  • a high point 262 on cam 260 periodically moves blade 250 away from contact 251 for a purpose to be described hereinafter.
  • a sprocket wheel 263 fixed to shaft 261 is driven by a chain 264 meshing with a sprocket wheel 265 fixed on shaft 266 rotatably mounted on mechanism K.
  • lay 2 reciprocates back and forth and near the end of its forward motion detector finger 186 enters shuttle box B1 and shuttle yW1 to contact a bobbin therein for a weft detection operation. If there is ample weft on the bobbin, finger 186 and slide member will be moved forwardly by continued forward movement of the lay. Contacts 192 and 193 on slide member 185 therefore will remain open and a change for loom operation will not ⁇ be given.
  • weft detector D1 and gang LG will be moving vertically, either up or down, toinove shuttle box B1 into or out of picking position.
  • lf box B1' is to move out of picking position a low roll in column a of chain C will be under switch blade 256,- thus permitting the blade to drop away from contact 257 to prevent completion of therst described circuit even though ng'er 186 moves counterclockwise, Fig. 25, in the described manner to close contacts 192 and 193.
  • box B1 is to move into picking position a high roll in column a will .maintain blade 256 against contact 257 and upon counterclockwise movement of finger 186, Fig. 25, the circuit first described above, will be completed to energize holding relay 24S whereupon the holding circuit will be completed to initiate a change in loom operation as described ⁇ hereinabove.
  • the high point 262 of 'cam 266i will move blade 250 away from contact 251 to open the holding circuit.
  • High point 262 operates on every beat of the loom before front center to separate blade 258 and contact 251. Opening of the holding circuit will alsocause deenergi'zationof solenoids 232 and 148 with resultant inactivation of core 234 and latch 142 whereupon the loom lwill continue to operate in the usual manner until the next detection of weft exhaustion occurs.
  • thread cutting mechanism generally indicatedpat 270 is supported on the upper' end of rod 97, seel Figs. 3 and 12.
  • a collar 271 loosely surrounds rod 97 and' has extending therefrom an' arm-'272 carrying a stud 273' on which a pair of cutting blades 274 and 275 are mounted, blade 274 being fixed withV respect to ⁇ studs 273 and 275 being pivotally movable thereon.
  • Blade 275 has an extension 276 formed with a hole 277 through which extends a pin278 fixed to arm 272. Hole 277 is larger than pin 278 to permit pivotal motion of blade 275.
  • Blade 274 has a liole (not shown) to receive pin 278, said hole being only slightly larger than the pin, thereby preventingany appreciable pivotal motion of blade 2,74.v Blade 275 has depending therefrom a tail piece member 279 for coaction'with a screw 281 ⁇ and a cutter blade actuator 282m afmanner'tobe described hereinafter.
  • a pressure spring' 283 on stud 273 exerts a force Vagainst a plate 284 to maintain blades 274 and 275 frictionally engaged to each other.
  • a spring' 286 surrounds rod 97 between the collars 271 and ⁇ 285, one" end of the spring being xed to collar 271 and the other e'nd being fixed to collar 285i" Theiaction of the spring tends to move the cutter bladesfin a clockwise' direction around rod 97 as viewed inFig. 1l.
  • leg 289 a downwardly extending leg 289, the lower end of which carries a stud 290 having a cam roll 291 thereon.
  • Leg 28 hasV a short upstanding pin 292 for engagement with arm 272 and collar 271, said pin maintaining cutter mechanism 270 in forwardly retracted position during normai loom operation.
  • a supporting block 293 on ,tubular guide has xed thereto a cam plate 294 having a slot to receive cam roll 291 therein, said slot being generallyindicated at 295.
  • Slot 295 has a vertical dwell portion 296 joining a portion 297 inclined downwardly and to the right, see Fig. 4.
  • Cam plate 294 may be considered as an actuator for L-shaped member 287.
  • Roll 291 will move upwardly and to the left along slot 296 and thereby, due to relative motion between box 45 and subgang 46, move pin 292 clockwise around -rod 97, Fig. ll, thus permitting spiing 286 to exert its force to move cutter mechanism 270 away from stop screw 281 to cutting position.
  • cutter blade actua-tor 282 engages tailpiece member 279 moving the latter forwardly causing v see Fig. 14.
  • Torsion spring 286 is stronger than flat spring 283 and there will beno forward movement of the cutter mechanism until the bottom of hole 277 contacts pin 278 whereupon continued motion of the lay will move the cutter mechanism forwardly such that tailpiece member 279 will be just back of screw 281 when the lay is at front center at which position the weft replenishing operation will be completed.
  • pin 292 is located forwardly andy to the right of the vertical axis of rod 97, see Fig.y 1l, thus pro viding a means for holding the cutting mechanism in retracted position when the roll 291 is in its low positionl in the inclined portion 297 of slot 295, but it is toghe understood that the pin 292 and its location Aon arm ⁇ 287 is shown as but one means of holding the cutting mechanisrn in retracted position and that other means may be employed without departing from/ the scope if the invention.
  • thread control and shuttle box feeler mechanism 34 has depending ktherefrorrr a thread placer 31N)l whichy positions the outgoing-thread t after it has been cut, Fig. 14, into a pneumatic thread remover 301.
  • thready placer. 2:11()l will move to the dotted line positiomFig. l1, and upon resetting ofthe magazine 'in' the usual manner following a' weft r ⁇ e ⁇ plenishing operation, thread placer 300 will be moved to the full line position to place outgoing thread t into thread remover 301.
  • the placer 300 is prevented from moving rearwardly either by a misplaced shuttle indicated by dot and dash lines, Fig. 11, or failure of shuttle box 45 to separate from subgang 46 during a weft replenishing operation, the placer 300 will be engaged by the shuttle or subgang, as nthe' case may be, and be moved forwardly by forward motionk of the lay, to the full line position, Fig. l1, to prevent a weft replenishing operation in a manner well known.
  • Fig. 15 shows diagrammatically the controls for the thread t of a newly replenished shuttle after its rst picking operation.
  • the lay lirst moves rearwardly and then forwardly and on its forward stroke left and right thread pushers 302 and 303 on the lay move the thread t' into holding relationship with left and right retaining hooks 304 and 305 respectively fixed with respect to the loom frame 1.
  • a temple thread cutter (not shown, but the operation of which is well known) will cut the thread t adjacent the fabric and the thread thereafter will be removed by a thread holder 306 in well known manner.
  • Thread guides 307 and 308, Figs. l, 3 and 1l prevent entanglement of the filling threads with the going parts on the weft replenishing side of the loom.
  • Fig. 17 diagrammatically shows a seouence of 24 successive picks numbered from I to XXIV, in which two colors of filling are used with two pairs of shuttles, one color being used with one pair of shuttles only, and the other color being used with the other pair of shuttles only.
  • the picking of the shuttles will be such that a shuttle of one of said pairs will be followed by a shuttle of the other of said pairs which in turnis followed rst by the second shuttle of said first pairs and secondly, by the second shuttle of said second pairs.
  • the shuttles will be picked W1, B1, W2, B2, etc. for a 24-pick repeat and it will be noted that none of the shuttles of any pair are picked consecutively thereby resulting in perfect blending of both colors.
  • the sequence above described is but one example of a number of different sequences which can be employed.
  • Fig. 18 diagrammatically illustrates the weft replenishing operation for one shuttle, namely, W1, and will be understood that weft replenishing of any of the remaining shuttles will be the same.
  • Ia represents the position of the lay at front center or at the time indication of weft exhaustion takes place
  • Ib is top center or the start of picking of the shuttle
  • Ic is back center or the midway position of the flight of the shuttle toward box 45
  • Id is bottom center position or the position at which the shuttle is fully boxed in box 45.
  • the shuttle box B4 of gang LG in this instance, is not utilized, but it is apparent by those skilled in the art that by rebuilding'the chain in the usual manner box B4 may be utilized to accommodate a shuttle, and if desired, one having a decorative color therein and still retain the features of perfect blending of the two ground colors. As shown in the lower part of Fig. 25,. provision is made in the circuit for weft detecting mechanism in the event box B4 is utilized. l t,
  • a weft replenishing operation is initiated when a shuttle in active position in gangvLG' is depleted of weft and the single box 45 is in activeI shuttle receiving position.
  • the auxiliary of secondary box motion will lift the box 45 away from the subgang thereby opening up a space below it for the outgoing depletedv bobbin even though the subgang itself is being lifted during the actual bobbin transferring operation.
  • the separation of box 45 from the subgang 46 produces a relative motion between the operating parts of the cutter mechanism to move the latter to cutting position to sever the thread of the outgoing bobbin.
  • the cam which controls the rising of the box 45 is so designed that it permits the top box to return to a position where it is supported by the subgang before the immediately ensuing picking operation. While this is a desirable mode of operation the invention is not necessarily limited to it. It should be noted that this cam does not positively lift the box 4S to its highest position but serves initially to give the box an upward motion so that the box by its momentum can continue on to the transfer position with out requiring the application of positive force throughout the entire up motion of the box. A stop means shown in Figs. 4, 11 and 16 limit up motion of the box 45.
  • This stop means comprises an angle iron 315 secured to the layend 30 having secured to it a second angle piece 316 having a horizontal part 317 the under side of which -is provided with a stop 318 made preferably of some such material as leather.
  • the stop 318 overhangs the. bar 103 and arrests it in its upward motion to limit the rise of box 45.
  • a weft replenishing loom having a reserve bobbin transfer station, a single shuttle box shiftable vertically below ⁇ the station, agan'g of at least two shuttle boxes separate from the single Abox shiftable vertically under ⁇ tion to leave a space below the single box and above the gang for egress of a depleted bobbin from the single box; said means including a cam which effects a positive lift of the single box partway to the transfer station and the single box completes its up motion to the transfer station due to its momentum and is able due to its momenturn while completing its motion to the transfer station to withstand the downward force incident to insertion into it of a reserve bobbn without requiring additional support.
  • shuttle box structure for a weft replenishing loom having primary and secondary box shifting mechanisms, a gang of at least two shuttle boxes for operation by the primary mechanism, a single shuttle box above the gang for operation by the secondary mechanism, lifting elements secured to and depending from the single box for operative connection with the secondary mechanism to effect upward motion of the single box relative tofthe gang, guide means on the gang for said elements,
  • said secondary mechanism including a box lifter rod operatively connected to the lifter elements, a chain one end of which is fixed and the other end of which is operatively connected to the box lifter rod and is trained over a vertically movable sprocket, and means to lift the sprocket to effect raising of the lifter rod and elements and the single box.
  • two vertically aligned and shiftable shuttle'box members v which on non-replenshuttle receiving position and ishing beats of the loom are adjacent to each other and shift without relative motion as a unit but which on replenishing beats of the loom have a relative vertical motion in which the upper member rises away from the lower member to a transfer station and opens a space between them for egress of a spent bobbin moving downwardly from the upper member, a cutter for the thread of the spent bobbin normally in non-cutting position, and two cooperating parts, one on each member, effective due to said relative vertical motion of the members to move the thread cutter to thread cutting position.
  • two vertically aligned and shiftable shuttle box members which on nonreplenishing beats of the loom are adjacent to each other and shift without relative motion as a unit but which on replenishing beats of the loom have a relative vertical motion in which the upper member moves upwardly away from the lower member to a transfer station to open a space between them for egress of a spent bobbin moving downwardly from the upper member, a weft thread cutter for a thread in the upper member normally in non-cutting position moving vertically and remaining in register with the upper box member, and two cooperating parts, one moving vertically With the cutter and the other mounted on and moving with the lower member, effective due to said relative vertical motion of the members to move the thread cutter to thread cutting position.
  • shuttle box structure for a weft replenishing loom having primary and secondary box shifting mechanisms, a gang of at least two shuttle boxes for operation by the primary mechanism, a single shuttle box above the gang for operation by the secondary mechanism, lifting elements secured to and depending from the single box for operative connection with the secondary mechanism to elect upward motion of the single box relative to the gang, guide means on the gang for said elements, said gang having a back which extends above the top box of the gang and partially supports the top box above the gang to provide a space between the gang and top box, and a spent bobbin deflector secured to the gang located in said space.
  • a weft replenishing loom having a reserve bobbin magazine and shifting shuttle boxes on at least one end thereof, a separable shuttle box cell forming part of said shuttle boxes but movable upwardly with respect to the remainder of the shuttle boxes to a transfer position for a weft replenishing operation with respect to a shuttle therein, a weft detector at the opposite end of the loom to detect the condition of weft in a shuttle at said opposite end and controlling operation of the magazine and in the event of exhaustion of weft in the shuttle causing movement of said cell to said transfer position and effecting replenishment of the shuttle therein on the next beat of the loom following indication of exhaustion of weft in the shuttle at said other end.

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US625788A 1956-12-03 1956-12-03 Pick and pick automatic loom Expired - Lifetime US2929411A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392757A (en) * 1966-10-14 1968-07-16 Gustaf A. Sundquist Jr. Shuttle box operating mechanism
US3410315A (en) * 1965-10-11 1968-11-12 Crompton & Knowles Corp Weft replenishing loom

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333904A (en) * 1941-12-08 1943-11-09 Crompton & Knowles Loom Works Pick and pick loom
US2777473A (en) * 1953-09-11 1957-01-15 Forstmann Woolen Co Automatic weft replenishing loom

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2333904A (en) * 1941-12-08 1943-11-09 Crompton & Knowles Loom Works Pick and pick loom
US2777473A (en) * 1953-09-11 1957-01-15 Forstmann Woolen Co Automatic weft replenishing loom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410315A (en) * 1965-10-11 1968-11-12 Crompton & Knowles Corp Weft replenishing loom
US3392757A (en) * 1966-10-14 1968-07-16 Gustaf A. Sundquist Jr. Shuttle box operating mechanism

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