US1815277A - Pile wire loom stopping mechanism - Google Patents

Description

July 21, 1931.. R. SPENDLOVE FILE WIRE LOOM STOPPING MECHANISM Filed Feb. 13, 1930 2 Sheets-Sheet 1 Fig.1.

WMQV/J Rob'erT Spendbve byfwwkw ATTys.

July 21, 1931. R, SPEND LOVE 1,815,277

FILE WIRE LOOM STOPPING MECHANISM Filed Feb. 15, 1930 2 Sheets-Sheet 2 73 \n v e nTor.

75 RoberT Spend\ove familiar to those skilled necessary here to illustrate and describe- Patented July 21, 1931 STATES PATENT ()FFECE ROBERT SPENDLOVE, 0F SANFORD, IVIAINE, ASSIGNOR TO SAN FORDYMILLS, 0F SANFORD, MAINE, A CQIREOR-ATION OF MAINE FILE WIRE LOOIVE STOFPING MECHANISM Application filed February 13, 1930.

This invention relates to looms for weaving pile fabric in which the pile is formed, usually from the warps, over pile Wires inserted into the shed and w'thdrawn from the fabric as the weaving operation proceeds. mechanism for inserting and withdrawing the pile wires fails to function properly" so that a wire is not withdrawn or a wire is not inserted at the proper time, a serious defect is formed in the fabric. These pile fabric looms therefore require the constant attention of the operator so as to observe, if possible, the beginning of an improper functioning of the pile wire inserting and Withdrawing mechanism and stop the loom and repair or adjust the mechanism before the defect forms in the fabric. 0 v

The present invention has for its ob ect to provide for the automatic stopping of the loom whenever the pile wlre lnserting and withdrawing mechanism fails to function properly by fallmg to withdraw the pile wire or by failing is therefore of great importance because it renders unnecessary constant attention by the operator to'the pile wire inserting and withdrawing mechanism and thus enables an operator to attend more than one loom.

The invention has therefore as its further object to provide mechanism which prevents formation of defects in the fabricor cloth being woven due to the failure of pile wire inserting and withdrawing mechanism to function properly.

The invention has for its further object to provide a mechanism securing the desired results which shallbe electrically controlled. These and other objects and features of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims. As the general construction and operation I of looms 'for weaving pile fabrics employing pile wires in the formation of thepile, which pile wires are inserted and withdrawn during the weaving operation, are well known and in the art, it is only mechanism. to insert a pile wire whichv normally happens when the mechanism fails to withdraw the pile wire. The invention Serial No; 428,004.

those parts of one well-known type of suchloom with which preferred forms of the in-- vention are particularly concerned. 7

In the drawings: Fig. 1 is a top elevation of a so-called wire motion or mechanism for successively inserting pile wires into the shed and Withdrawing them from thefabric, together with elements of a preferred form of the invention embodied therein. 7 I Fig. 2 is a side elevation partially in vertical cross section of the construction shown in Fig. 1. Fig. 3 is a detail in rear elevation of a portion of the mechanism shown in Fig. 1.

Fig. 4 is a view largely of a diagrammatic nature illustrating the general operation of a preferred form of mechanism embodying the invention. Fig. 5 is a detail showing the knock-off or stopping position of the loom stopping Fig. 6 is adiagrammatic view illustrating the application of the invention to a loom equipped with an individual motor drive.

In the type of loom illustrated, the pile wires are inserted and withdrawn at the right-hand side of the loom. Each wire comprises fiat head 1 having an aperture fz extending transiersely therethrough, a camshaped lug 3 extending above the top surface at at the inner end and a short lug 5 extending above the top surface near the outer end, and the long wire proper 6 over which the pile of the fabric is formed. v

lVhen in working position in the loom, the heads of the pile wires are supported and positioned in a. magazine, the base 7 of which is secured to the loom frame. From this base rises an overhanging arm 8 having at the front an outwardly projecting wall 9 of the wall 10 and the head abutting the arm 8, held down by the spring 11 and pressed toward the wall 9 by the follower 10. As the weaving operation proceeds, the foremost pile wire is withdrawn outwardly from the magazine and then in sertedinto the shed in the rear of the magazine and in front of the wall 10. When, during the inserting movement, the inner end of the head of the pile wire reaches the space between the cam-shaped face of the outer end of the next adjacent pile wire, the continued inserting movement forces the heads of the pile wires already in the magazine forward and the head of the pile wire being inserted slides into the magazine and into position therein.

The mechanism shown for withdrawing and inserting the pile wires is of a familiar type. The pile wire, as it is withdrawn and inserted, is guided in a. groove 14 of a wire guide 15 pivotally mounted at its extreme outerend and shifted as required so that its inner end moves'fro-m the position shown in Fig. 1 rearward to the inserting position and then back to the position shown in Fig. 1. A carriage 16 is mounted to slide on the rigid guide or way17 and rests upon the wire guide 15. This carriage is given its reciprocating movement at the required times by a link 18 connected to a reciprocating arm or actuator 19 operated in the usual manner. This carriage is provided with the withdrawing hook 20 pivoted thereon at 21, and yieldingly pressed rearward so that when the carriage is in its extreme inner position the hook will catch hold of the pile wire by entering the aperture 2 and engaging the head of the pile wire at the outer end of this aperture. Henceas the carriage reciprocates outwardly, the pile wire is withdrawn. In Fig. 1 the carriage is shown as thus withdrawing the foremost pile wire. A latch member 22 is transversely pivoted at 23 on the top of the carriage 16 and is pressed downw rd by a coiled spring 24 on a stud 25 extending from the carriage upward through the latch. hen a pile wire is being inserted, the latch rests on top of the head of the pile wire and presses against the lug 3. As the pile wire enters the magazine, the outer end of the latch rides up on the top cam surface 26 of the wall 10. When the carriage starts on its withdrawing movement, the hook 20 engages the aperture 2 in the foremost pile wire and when the head of the pile wireleaves the magazine, the head or inner end of the latch 22 drops onto the top surface 4 of the pile wire head and the latch is held in an upper or indicating position against the tension of the spring 24, as shown in Fig. 2. If, however, the hoolt20 has failed to engage the pile wire, there will be nothing to hold the latch 22 elevated and as the withdrawing movement takes place, the latch will drop into the position shown in dotted lines in Fig. 2.

In the preferred form of the invention illustrated, these positions of the latch 22 are utilized to actuate mechanism for stopping the loom. While Various mechanisms may be employed, there is here shown as one good way of accomplishing the desired result an electrically controlled mechanism. A base plate 27 is adjustably secured by bolts 28 to the rear face of the wire guide 15. On this base is adjustably mounted an electric con tact 29 from which the circuit wire 30 extends. On this base is also mounted a movable electric contact 31 from which the circuit wire 32 extends. This movable contact is shown as a plunger mounted to slide in alignment with the contact 29 in the lugs 33 and normally pressed toward the contact 29 by a coiled spring34l extending betweenone of the lugs and a collar 35 adjustably secured by a set screw 36 to the plunger or contact 31. A trip shown generally as a lever 37 fulcrumed at 38 on the base 27 is normally held by a spring 39 against a lug 10 on the base 27 in the position illustrated in Fig. 3 with the lower end of the lever engaging the collar 35 and holding the contact 31 away from the contact 29 against the tension of the spring 3%. This lever is formed in two parts, ll and 42, pivoted together at 43 and held in alignment with a light spring 44. It will therefore be seen, viewing Fig. 3, that if the upper end of the trip 37 is swung to the left, the lower end will swing up to the right, releasing the collar 36 and allowing the spring 3a to force the contact 31 against the contact 29. The two-part formation of this lever forms a give-way so that if the upper end of the trip 37 is swung to the right, no movement of the trip as a whole will take place.

The upper end of the trip 37 extends vertically into such a position thatif the head of the latch 22 is held in its upper or indicating position by a pile wire head, as shown in Fig. 2, the head of the latch will not engage the trip but will pass above it as the carriage moves back and forth. If, however, a pile wire head is not present, and consequently the latch 22 is not pressed upward, but instead is in its nonindicating position or lower posi tion shown in dotted lines in Fig. 2, then when the withdrawing movement of the carriage takes place, the head of the latch 22 will catch the trip and actuate it to free thecontact plunger 31 and close the electric circuit.

The closing of the electric circuit is utilized to effect the stopping of the loom and a simple arrangement for this purpose is shown, largely diagrammatically, in Figs. 4 and5. A loom stopping mechanism is represented by the shaft &5 having secured thereto the shipper handle 46 and the knock-off lever or projection 47 and it is assumed that, by any suitable mechanismsuch as is well known to those skilled in the art, a movement of this mechanism represented by shifting these dotted lines in Fig. 4

parts from the position shown in Fig. 4 to the position shown in Fig. 5 will effect the stopping of the loom.

As a simple and preferred means for thus shifting the loom stopping mechanism, the usual filling fork mechanism is utilized.

The filling fork mechanism is shown as of a usual type comprising a fork slide 48 mounted to slide forward and rearward in a holder or bracket 49 mounted on the breast beam of the loom. The usual filling fork 50 is shown pivoted at 51 in the fork slide. A usual form of weft hammer 52 is shown fulcrumed at 53 and is given its regular swinging movement by means such as usually employed. As is well known in this type of mechanism, if filling is absent from in front of the filling fork when the lay of the loom heats up, the fork will not be tilted on its fulcrum 51 but will remain in the position shown in Fig. 4 and the weft hammer will engage on the tail of the fork and move the fork slide forward to knock off or stop the loom. In the construction illustrated as embodying the present invention, a similar movement of the fork slide is utilized and this movement is obtained from a mechanism such as illustrated. This mechanism is shown as comprising a solenoid 54 mounted on the fork slide 48 and a bell crank lever fulcrumed at 55 on the fork slide. This bell crank lever is so arranged that under normal conditions a light spring 56 holds the core 57 of the solenoid against the vertical arm 58 of the lever and thus holds the horizontal arm 59 up out of the path of the weft hammer.v WVhen, however, the solenoid is energized by the closing of the electric circuit, the core 57 is withdrawn and the lever rocks into the position shown in so that the end of its horizontal arm 59 is in the path of the weft hammer. Consequently as the weft hammer swings forward, the fork slide is carried forward.

A simple form of connection by which the work slide operates the knock-off or loom stopping mechanism is shown as comprising a lever 60 fulcrumed at 61 and extending up forward of the fork slide. holds this lever toward the fork slide and a link 63 connects it to the knock-off lever 47. Consequently as the fork slide moves forward, the loom stopping mechanism is thrown from the position shown in Fig. 4 to that shown in Fig. 5 and the loom is stopped.

The electric contacts 2-9 and 31 with the circuit wires 30 and 32 already referred to are shown in Fig. 4. The circuit wire 30 runs to the solenoid 54, thence through a transformer 64, thence to a contact 65 on or connected to the shaft 45. The circuit wire 32 is shown as running to a fixed contact 66 rest ing at its end, in Fig. 4, on the contact 65. The contacts 65 and 66 are employed so that when the loom is stopped, the circuit will be A spring 62 g broken at this point and thus prevent burning out of the solenoid.

The operation of the invention will now be clear. If the hook 20 which is the element for catching hold'of and withdrawing the pile'wi're from the magazine fails to catch hold of the pile wire and consequently the latch 22 is not moved or lifted into its indieating position as the withdrawing movement takes place, the latch will engage and actuate the trip 37, closing the contacts 29 and 31, energizing the solenoid 54, allowing the arm 59 of the lever to drop in front of the weft hammer 52, and as the weft hammer 52 swings forward, the fork slide 48 will be carried forward and the parts 45, 47 and 46 will be swung from the position shown in Fig. 4 to that shown in Fig. 5, stopping the loom and simultaneously breaking the electric circuit.

It will be observed that this wire motion or pile wire inserting or withdrawing mechanism as illustrated, when it is acting normal ly, inserts into the shed the same pile wire which it has just withdrawn from the fabric.

The mechanism thus illustrated and described in detail is but one form which the broad invention may take whether controlled electrically or otherwise.

Frequently looms are run by individual motors and as illustrating another application of the invention, the broad principle may be applied to the stopping of the loom by breaking the driving motor circuit upon the failure of the pile wire inserting and withdrawing mechanism to withdraw or insert a pile wire. This idea is illustrated diagrammatically in Fig. 6 wherein the contacts 67 and 68 similar to 29 and 31 already described are assumed to be operated by a trip 69 similar to the trip 37. In this case when the electric circuit is closed by the failure of the pile wire mechanism to function properly, it energizes a solenoid 70 which moves a core '71 to the, left and swings a contact lever 72 away from a contact 73, thus opening the circuit 74 through the driving motor 7 5 and consequently stopping the loom.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A loom for weaving pile fabric comprising'bodily movable means for inserting and withdrawing pile wires including a normally depressed latch movable with said means and held elevated by a pile wire when engaged and being withdrawn by said means, and means actuated by the latch to stop the loom when the withdrawing movement of the said inserting and withdrawing means takes place with the latch depressed.

2. A loom for weaving pile fabric comprising bodily movable pile wire inserting and. withdrawing mechanism 7 having a latch bodily movable therewith and resting upon 7 and bein withdrawn the pile wire when the pile wire is being withdrawn and standing in a lower position when a pile wire is absent on the withdrawing movement, a trip in the path of the latch when in its lower position but out of the path of the latch when the latch is supported by the pile wire, loom stopping means, and means to actuate the loom stopping means upon the operation of the trip.

, 3. A loom for weaving pile fabric comprising pile wire inserting and withdrawing mechanism including an element for catching hold of a pile wire and a second element moved into the retained in an indicatingposition when the first element catches and holds the pile wire, and means operated by the second element to effect the stopping of the loom when the withdrawing movement of said mechanism takes place with the second element in non-indicating position.

i. A loom for weaving pile fabric comprising means for inserting and withdrawing pile wires and electrically controlled means, aetuated by the aforesaid means upon the failure of the aforesaid means to withdraw a pile wire, to stop the loom.

A loom for weaving pile fabric comprising pile wire shed-inserting and withdrawing means acting after the insertion of pile wire to engage a previously inserted pile wire and withdraw it, and electrically controlled means acting to stop the loom upon a withdrawal movement of the aforesaid means after failure to engage and withdraw a pile wire as required in the loom operation.

6. A loom for weaving pile fabric comprising means for inserting and withdrawing pile wires, a knock-offmechanism for stopping the loom, and electrically controlled means for actuating the knock-off mechanism to stop he loom renderedactive by movement of the afo-resaie means upon failure of a pile wire to be withdrawn as required in the weaving operation.

7. A loom for weaving pile fabric comprising bodily movable means for inserting and withdrawing pile wires including normally depressed latch movable with said means and held elevated by a pile wire when engaged by said means, an electric circuit, means actuated by the latch to close the circuit when the withdrawing movement of the said inserting and withdrawing means takes place with the latch depressed, and means actuated by the circuit when closed to stop the loom.

S. A loom for weaving pile fabric comprising bodily movable pile wire inserting and withdrawing mechanism having a latch bodily movable therewith and resting upon the pile wire when the pile wire is being withdrawn and standing in a lower position when apile wire is absent'on the withdrawing movement, a trip in the path of the latch when 7 1 in its lower position but out of the path of the latch when the latch is supported by the pile wire, loom stopping means, an electric circuit, means to close the circuit actuated by the trip whenthe trip is struck by the latch, and means actuated by the circuit when closed to operate the loom stopping means.

9. A loom for weaving pile fabric comprising pile wire inserting and withdrawing mechanism including an element for catch ing hold of a pile wire and a second element moved into and retained in an indicating position when the first element catches and holds the pile wire, an electric circuit, means actuated by the circuit when closed to effect the stopping of'the loom, and means ope-rated'by the second element to close the circuit" when the withdrawing movement of said mechanism takes place with the second element in non-indicating position.

10. A loom for weaving pile fabric comprising means for inserting and withdrawing pile wires and means, actuated by the said inserting and withdrawing means upon its withdrawal movement after failure to withdraw a pile wire, to stop the loom.

11. A learn for weaving pile fabric comprising means for inserting and withdrawing pile wires and means, actuated by the withdrawal movement without a pile wire of said inserting and withdrawing means, to stop the loom.

12. A loom for weaving pile fabric comprising pile wire shed inserting and withdrawing means acting after the insertion of pile wire to engage a previously-inserted pile wire and withdraw it, and means operated by said inserting and withdrawing means and acting to stop the loom upon the failure of the said inserting and withdrawing means to engage and withdraw a pile wire as required in the loom operation.

13. A loom for weaving pile fabric comprising means for withdrawing and inserting a pile wire and means, actuated by the movement without the said pile wire of said witl plrawing and inserting means, to stop the oom.

lin testimony whereof, I have si ned my name to this specification.

ROBERT SPENDLOVE.

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