US2365106A - Loom stop motion attachment - Google Patents

Description

Dec. 12, 1944.

511". PUGH LOOM STOP MOTION ATTACHMENT Filed May 24, 1943 AShets-Sheet l Dec. 12, 1944. v s. T. PUGH' LOOM STOP MOTION ATTACHMENT 4 Sheets- Sheet 2 Filed May 24, 1943 s. T. PUGH LOOM STOP MOTION ATTACHMENT Dec. 12, 1944.

Filed May 24, 1943 4 Sheets-Sheet 3 LOOM STOP MOTION ATTACHMENT Filed May 24, 1945 4 Sheets-Sheet 4 Patented Dec. 12, 1944 UNITED STATES ATENT OFFICE LOOM STOP MOTION ATTACHMENT Samuel T. Pugh, Radford, Va.

Application May 24, 1943, Serial No. 488,243

6 Claims.

This invention relates to a stop motion attachment for a Draper loom.

An object of this invention is to provide an attachment for a loom which is correlated with a bobbin battery and the lay whereby the loom will be stopped in the event the combined cutter and gripper, known as the Stafford cutter, which is eifective at the time of the transfer, fails to grip and hold the thread, of the discharged bobbin.

Another object of this invention is to provide an attachment of this kind which is adapted to be connected to the center fork stop mechanism, and operable on the first movement of the newly filled shuttle to stop the loom so as to prevent irreparable damage to the fabric. In practice this device is designed as an extension of the center fork stop mechanism so thatthis mechanism will be effective to stop the loom under conditions wherein this mechanism is normally ineffective or is delayed in its action.

A further object of this invention is to provide an attachment of this kind which is moved to set position during each transfer operation, and is moved to released position by the gripped thread of the new bobbin when the lay moves away from the transfer mechanism so that in the operation of the lay following the bobbintransfer the device will be normally inactive.

A further object of this invention is to provide an attachment of this kind which includes a hunter or setting arm which is secured to the latch finger of the transfer mechanism, the latter being normally inactive except during the transfer cycle, so that the setting arm will be normally out of the path of the stop mechanism except during the transfer cycle when the latch finger is raised to operative position.

A further object of this invention is to provide an attachment of this kind which is of simple construction and can be connected to the present parts of a Draper loom without change and at small cost.

It is well known that in a Draper loom embodying a bobbin battery, a Staiford cutter is used to cut the thread of the new bobbin. This cutter includes a gripping or clamping means for holding the severed end of the thread until the shuttle makes one or more traverses. A part of this cutter includes a fiber or leather jaw which when worn and not replaced will fail to firmly grip the cut thread end, and this loose end causes flaws to occur in the fabric. The attachment to be hereinafter described will immediately stop the loom upon failure of the Stafford cutter to function properly, the loom stopping on the first traverse of the newly filled shuttle and acting ahead of the center fork stop mechanism which in certain instances is not effective such as when the loose end of the filler overlies the center fork fingers.

Embodying the foregoing objects and others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawings:

Figure l is a detail front elevation partly broken away of a lay having mounted thereon an attachment constructed according to an embodiment of this invention,

Figure 2 is a plan view of the lay including the box and a portion of the transfer mechanism,

Figure 3 is a sectional view taken on the line 33 of Figure 2,

Figure 4 is. a sectional view taken on the line 44 of Figure 2,

Figure 5 is a sectional view taken on the lin 5-5 of Figure 2,

Figure 6 is a plan view partly broken away and in section of the device,

Figure 7 is a sectional view taken on the line 'l'! of Figure 5,

Figure 8 is a plan view partly in section showing the finger and trigger support, and

Figure 9 is a plan view partly in section of the trigger operator which is mounted on the latch finger of the transfer mechanism.

Referring to the drawings, the numeral Ill designates generally an oscillatory lay of conventional construction which is associated with a Draper loom. The lay ID has mounted at one end thereofa box ll within which a shuttle I2 is adapted to engage at each reciprocation of the latter and when the bobbin in the shuttle l2 becomes exhausted a new bobbin is transferred to the shuttle I 2 by means of a bobbin replenishing structure, generally designated as 14.

The replenishing structure 14 is conventional and the structure herein shown is similar to the replenishing structure embodied in patent 726,- 576, dated April 26, 1903. The replenishing structure includes a magazine I3, a transfer finger l5 which is carried by a bell crank IS. The bell crank l6 includes a pivoted latch finger l1 formed at its rearward end with a recess l8 within which the bunter l9 carried by the lay I is adapted to engage. The bunter IQ is adapted to rock the bell crank IE to depress the transfer finger l and eject a bobbin B from the magazine I3, the bobbin B dropping into the shuttle l2 when the latter is in a position overlying an elongated opening which is formed in the box The loom structure also includes a. combined cutter and gripper 2| for cutting the thread from the empty bobbin at the time of the transfer of the new bobbin from the magazine to the shuttle. However, the combined cutter and gripper 2|, which is known in the trade as a Stafford cutter, becomes worn and fails to properly grip the thread so that the loose end of the thread is dragged into the shed and causes flaws in the cloth. Where the projecting portion of the thread is loose, the center fork mechanism is operated to stop the loom, but if the trailing end of the thread is long enough to overlie the center fork stop mechanism and is held taut by snagging, the center fork stop. mechanism frequently will not be effective.

The stop motion attachment to be hereinafter described is operative during the transfer cycle and is adapted to be effective before the centerfork stop mechanism. The attachment includes a frame 22 which is mounted on the front side of the box II. The frame structure 22 includes a pair of side frame members 23 and 24 which are held in spaced apart relation by means of bolts 25 having spacer sleeves 25 mounted thereon The frame 22 is held in forwardly projecting re lation with respect to the box ll'by means of an L-shaped supporting member 21. The L.-shaped supporting member 21 includes an elongated side 28 formed with an elongated slot 29 through which securing bolts 38 are adapted to engage. The provision of the elongated slot 29 provides for the. adjustment of the frame 22 with respect to the front side of the box The supporting member 2'! also includes a rear side 3| having an elongated slot 32 through which a fastening bolt 33 is adapted to'engage. The bolt 33 :is threaded into a depending flange 34 forming part of the box The frame 22 has rockably mounted therein a thread engaging finger 35. The finger 35 is of U-shape configuration having the bight 38 thereof uppermost, and the ends of the parallel legs are secured in a block 31 which is disposed between the sides Hand 24 of the frame 22. The block 31 has formed integral therewith a shaft 38 which is rockably mounted in the side members 23 and 24. The block 31 is formed with a relatively large central opening 38 throughwhich a spring 48- extends. is looped over a transverse bar 4| which is secured between the legs of the finger 35,- and the other end. of the spring 40 is looped over a transversely extending cotter pin 42.

The cotter pin is disposed below the shaft 38 in a position whereby the spring 40 will swing the finger 35 rearwardly and upwardly to a set position when the finger 35 passes the center linebetween the cotter pin 42 and the axis of the shaft 38. The spring 40 is also adapted to swing the-finger 35 downwardly to a released position which is the position shown in dotted lines in Figure 4, when the finger 35 passes the center linebetween the shaft 38 and the cotterpin 42. The shaft 38 at one end thereof-has secured One end of the spring 40- thereto a. trigger 43. The trigger 43 is locked in- ".lay opposite from the box adjusted position on the shaft 38 by means of lock nuts 44. The trigger 43 extends inwardly in spaced relation to the side 23 of the frame 22 and is adapted when in set position to rest on'a shaft extension 45. The shaft extension 45 is disposed on the forward side of the box II and also the lay ID.

The shaft extension 45 is coupled by means of a coupling member 48 to the center fork stop motion shaft 41. The shaft 41 is urged to the right by means of a spring 48. The opposite end of the shaft 4'! is pivotally secured to one side of abell crank 49. The bell crank 49 is rockably carried by a support 50 secured to the end of the The bell crank 49 is adapted to be rocked counterclockwise, as viewed in Figure 1, simultaneous with the rearward swinging of the lay H] by means of an operator 5|. The center fork stop motion structure including the shaft 41, the bell crank 49 and operator 5| are conventional and form .-a part of the loom structure at present in use. An illustrative form of center fork stop motion structure is shown in Patent Number 1,865,930 issued July 5, 1932. The attachment herein disclosed is mounted to the right of the center fork structure shown in Patent #1365330, as viewed in Figure 1. The shaft extension 45 slidably engages through the side 24 of the frame 22 and has secured thereto an abutment or trigger engaging member 52. The trigger engaging member 5215 secured in adjusted position lengthwise ofthe shaft extension 45 by means of adjusting bolts 53.

The trigger. 43 is adapted to be rocked rearwardly to a set position in the path of the reciprocation of the abutment 52 by means of afinger 54. The finger 54- is formed integral with and extends at right angles to a plate 55 which is formed with an elongated opening 58 and secured to the latch finger adjusting bolt 51. In Fig.- ure 4 the trigger is shownv in full linesin the set position contacting with the reciprocating shaft 45 and is shown in dotted lines in the released position. After the bobbin transfer has been completed, the latch flnger |l is swung downwardly to a position out of the path of the bunter I9 by well known mechanism so that the trigger operator 54 will not be in the-path of the trigger 43 during the normal operation of the lay. When in set position; trigger 43 is positioned in the path of trigger engaging member 52 soas to thereby hold shaft 41 against endwise movement under the action of spring 48. The holding of shaft against endwise movement positions finger 58 in the path of the belt shifter mechanism so as to thereby shift this mechanism to loom stopping position.

In the use and operation of this stop motion mechanism, the device issecured in proper position on the front side of the lay between the latch finger andthe combined thread cutter and gripper 2|. The trigger operating member 54 is secured to the adjusting bolt 51 of the latch finger l1, and the shaft extension 45 is secured by the coupling member46 to the conventional for the balance of its rearward movement toward set position.

Assuming that the combined cutter and gripper 2|, which is adapted to enter the opening 58 in the box I I, properly cuts and grips the thread T when the picker stick moves the shuttle 12 across the lay, the thread T will assume the angle substantially as shown in Figure 2, this angle gradually increasing as the lay moves away from the transfer structure. The movement of the lay away from the transfer structure will cause the thread T which is gripped by the cutter 2| to swing the finger 35 downwardly to the released or inoperative position, shown in dotted lines in Figure 4. In this position the trigger 43 will then assume the dotted line positionin Figure 4 out of the path of movement of the abutment 52. Spring 49 will swing finger 35 and trigger 43 to fully released position after finger 35 is rocked forwardly past the vertical center of the shaft 38. The stop motion attachment is in the dotted line position of Figure 4 inoperative to stop the loom, and the loom will continue in its operation until the existing bobbin is empty, whereupon the transfer cycle will be repeated. Under normal operating conditions finger 59 will be moved out of the path of the belt shifting mechanism by means of spring 48.

Assuming that the combined cutter and gripper 2| during a transfer cycle fails to properly grip the thread following the transfer, the finger 35 will remain in the full line position shown in Figure 4, as the thread will not swing the finger 35 to a released or inoperative position. Under this condition the trigger 43 will remain in conand at this time the finger 59 carried by the bell crank 49 will contact the usual stop mechanism forming part of the center fork stop motion structure to stop the operation of the loom.

It will be apparent from the foregoing that the attachment hereinbefore described is operative ahead of the operation of the center fork stop motion structure and works independently of the feelers or fingers forming part of the center fork mechanism.

A device constructed according to this invention has been placed on a Draper loom and has been very effective in preventing flaws occuring in the weaving of the fabric. This attachment can be produced at a relatively small cost and secured to the present parts of a Draper 100m without alterations of such parts.

It will be appreciated that on the last travers of the shuttle during normal loom operation the center fork stop mechanism is inoperative, and when a new or filled bobbin is transferred to the shuttle the loom will continue normal operation irrespective of the condition of the thread ,from the discharged bobbin. In looms now in use and not embodying this attachment, if the cutter and gripper should fail to grip the thread of the discharged bobbin, but should cut the same, the threadv end would be loose and would be dragged into the shed, thus causing a flaw in the cloth. However, with this attachment the loom is stopped on the first traverse of the newly filled shuttle so that the flaw can be corrected before the loose end is irreparably woven into the cloth. The attachment therefore prevents the flaws occurring in the cloth which cannot be detected or corrected by the center fork stop mechanism and effects a very material saving in cloth in that the cloth is maintained first quality.

What I claim is:

1. A stop motion attachment for a m of that type having an oscillatory lay, a bobbin battery, a reciprocatory center fork stop mechanism carried by the lay and a combined thread cutter and gripper, said attachment including an extension secured to the center fork stop mechanism for reciprocation with the latter, an abutment carried by said extension, a swingable trigger carried by the lay and adapted when in set position to be disposed in the path of said abutment, a trigger setting member carried by the battery mechanism for swinging said trigger to an operative or set position when the battery is operative to effect a bobbin transfer, arid a releasing finger fixed relative to said trigger and disposed in a position to engage the thread held by said combined cutter and gripper to thereby swing said trigger out of the path of said abutment.

2. A stop motion attachment for a loom of that type having an oscillatory'lay, a bobbin battery, a reciprocatory center fork stop mechanism carried by the lay and a combined thread cutter and gripper, said attachment comprising normally inactive means mounted on the lay and connected to said center fork mechanism for actuating said center fork mechanism to stop the loom upon failure of said combined cutter and gripper to hold the thread, and means connected with and operated by said battery for moving said first means to operative position when the transfer mechanism is operating on its transfer cycle.

3. A stop motion attachment for a loom for mounting on the lay and correlated with the center fork stop mechanism, the bobbin transfer mechanism, and combined filler cutter and gripper, comprising a support member, means mounting the member on the lay, a thread engaging finger rockably carried by said member and adapted when in set position to be swung to an inoperative position by the thread held by said combined cutter and gripper, during the movement of the lay away from the transfer mechanism following a bobbin transfer, a trigger coupled to and rockable with said finger, means secured to said stop mechanism and engageable with said trigger when said finger is in set position for effecting operation of said stop mechanism, and means carried by said transfer structure engageable with said trigger to move the trigger and finger to set position during the transfer cycle.

4. A stop motion attachment for a loom for mounting on the lay and correlated with the center fork stop mechanism, the latch finger oi the transfer mechanism and combined filler cutter and gripper; comprising a support member, means mounting the member on the lay, a thread engaging finger rockably carried by said member and adapted when in set position to be engaged by the thread extending from the box and gripped by said combined filler cutter and gripper whereby said thread will swing said second finger to an inoperative position, an abutment carried by said center fork stop mechanism, a trigger carried by said second finger and adapted to be positioned in the path of movement of said abutment when said second finger is in set position, and means fixed to said latch finger adapted to engage said trigger during the transfer cycle. to. thereby. swing said. second,- finger to; set position.

5.2 A stop. motion attachment, for. a loom; com.- prising a frame means mountingrsaid frame. on the lay. adjacent the box, an endwisev movable shaft slidably carried by said frame, means couplingsaid shaft vto-thereciproeal center fork stop motion shaft, a thread engaging fingeri rock,- ably carried by said. frame, aspringrconnected. to said finger and said firame for.- maintaining said fingerin eitherca. set or. inoperative position, a trigger fixed to said fingerand disposed, at one side. of said frame, an abutment .carried. by said couplingrmeans and. engageabletwith said trigger when said finger is in set positionstov thereby hold said center forkishaft againstreciprocation, and

momma anopemtsonadaptedto-bo mounted-onthelatch finger of the transfer mechanism engageable with said-trigger during the-transfer cycle tothereby swingsaid trigger into the path of said abutment:

6; The combination with the center fork stop mechanism of a loom; a 'lay operated bobbin transfer structure-and a, thread cutter and gripper,;of-means correlated 'with'the center fork stop mechanism; said-transfer-structure and said thread cutter-and'gripper for rendering said stop mechanism effective to stop the 100m upon failure ofysaidthread cutter and gripper to hold the thread-duringthe transfer cycle;

SAMUEL TL PUGHZ

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