US2685265A - Weaving-fault marking pistol - Google Patents

Description

Aug, 3,.1954 H. 'sPAHR' 7 I 2,685,235

WEAVING-FAULT MARKING PISTOL Filed Feb. 5, 19,51 s Sheets-Sheet 1 as 11 12' I 15 INVENT OR Hu 5 1; Mr.

Httovnays.

Aug. 3, 1954 H, SPAHR 2,685,265

WEAVING-FAULT MARKING PISTOL Filed Feb. 5, l 95l INVENTOR-I lqf oYwat a,

' s Sheets-Sheet 2 I Aug. 3, 1954 I I FLSQPAHRY' 2,685,265 Q I WEAVING-IFAULT MARKING PISTOL Filed Feb. '5, 1951 3 Sheets-Sheet 5 Patented Aug. 3, 1954 UNETED STATES TENT oFFics Claims priority, application Switzerland November 3, 1950 6 Claims.

When inspecting textile fabrics, it is customary to mark weaving faults by manually passing a thread by means of a sewing needle (i. e. a needle having an eye) through the selvage at the point in question, and knotting such thread. Such marking operation is rendered still more complicated and time-consuming in that for each operation the checking or inspection apparatus has to be stopped and restarted.

The primary object of my present invention is to provide a tool for marking faults in weaving, quickly and reliably without having to interrupt the operation of the cloth inspection apparatus. Another object is to provide such marking apparatus in a form adapted for other uses, for example for mounting a piece of twine or thread on a hanging label.

The apparatus according to my present invention comprises a bracket for supporting the selvage, a reciprocable operating needle, and a reciprocable looper disposed substantially at right angles, to the needle. The latter serves for engaging the marking thread which has been put on the bracket at substantially right angles to said needle, and for passing said thread through the selvage so as to form an open loop which depends from the selvage underside. The said loop by means of an erector is tipped about the selvage and raised above the upper side thereof into the path of the looper. The latter on reciprocating catches one leg of said loop and draws the same through the upstanding loop for the purpose of closing the loop.

The thread thus is positively located on the selvage and its ends, therefore, do not have to be knotted.

Two forms of my present invention are shown by way of example in the accompanying drawings in which- Fig. 1 is a section through the first form of apparatus in the position of rest,

Fig, 2 is a similar section, but in the operating position,

Fig. 3 is a section through that portion of the apparatus which comprises the loop erector, the position of the latter being different from that shown in Fig. 1,

Fig. 4 is a part top View of Fig. 3,

Fig. 5 shows a part side elevation of paratus,

Fig. 6 is a horizontal section through Fig.

Fig. 7 shows a part vertical section on the line VII-VII of Fig. 6,

Fig. 8 is a view, in a greater scale, of the lower portion of the loop-forming needle,

the ap- Figs. 9-11 are schematical views for illustrating three method steps for producing the closed loop,

Fig. 12 shows the second form of the apparatus in section and in the position of rest, looper being formed as tongs,

Fig. 13 is a horizontal section on the line XIII-XIII in Fig. 12,

Fig. 14 is a section similar to Fig. 13, in which the tongs, however, are open,

Fig. 15 shows a cross-section on the line XV-XV in Fig. 13, and

Figs. 16-18 depict schematically three method steps for producing the closed loop.

The first form of apparatus (Figs. 1-11) comprises a fiat casing l which has a lower handle 2 at the rear end. Opposite to handle 2 is a movable handle 3 which is pivoted on a cross-pin 4 rigidly secured to the casing l and has an extension 5. The said extension projects beyond the pin 4 and at 6 is formed as internally toothed segment in casing i. The said segment is engaged by a pinion l which is secured to an axle pin 3 mounted in casing I and forms a component of a free-motion means (not shown).

The segment 6 on its outside circumference forms a cam path 9 having a central cam 10. On a pin H rigidly secured to casing I is pivoted a bell crank I2 which near one end has a cross-pin i3 adapted to ride on the cam path 9. The other arm of bell crank I2 by pin-and-slot means l4, I5 is coupled to a slidable member iii which is disposed in a vertical guideway I? provided on the inside of the front endwall of easing l. A loopforming needle 18 is inserted from below in a longitudinal bore of member I6, which needle has an elongated recess 20 on the free end portion above the tip l9 (Fig. 8). The rear portion of recess 20 is formed to a nose 2|.

A presser 22 is disposed opposite the needle [8 and above a bracket 23 affixed to casing I, which bracket serves as selvage support. The presser 22 and the bracket 23 are slotted for the passage of needle 18. A vertical leg of presser 22 is slidable in a guideway 24 and through pin-and-slot means 25, 2 6 at its upper end is coupled to an arm 21. The guide-way 24 partly is formed by a wall 2% which belongs to the casing I and serves as lateral abutment for the selvage. The arm 27 is pivoted on a pin 29 affixed to casing I and coacts through a cross-pin 35 with a cam 3| which is affixed to the axle pin 8 and has two circumferential depressions 32 and 33.

Two arms 34, 35 are pivoted on pins 36, 3'! and by means of cross-pins 38, 39 ride on the periphcry of cam 3|. The arm 34 is connected to one end of a slidable member All disposed in a horizontal guideway 41 provided in casing i. A looper 42 is mounted on the other end of member 45, the path of said looper lying at substantially right angles to that of the loop-forming needle 18. The said casing wall 28 is slotted to allow the looper 42 to pass therethrough. Helical springs 43, 44 attached at one end to the axle pin 8, serve for urging the arms 27, 34 through their cross-pins 39, 38 into contact with cam 35, whilst the bell-crank 12 through its cross-pin i3 is urged into contact with earn 9 by means of a third helical spring 45. Preferably rollers are pivoted on the pins i3, 30 and 38.

The arm 35 is connected to a slidable horizontal member 46 which is guided in the lower portion of casing l. A helical spring Li? engaging the member 48 causes the arm 35 to abut against the cam 3! through its cross-pin 39 on which preferably aroller is pivoted. The member (l6 carries the erector 48 which is pivoted on a pin 49 below the bracket 23. A leaf spring 59 urges the erector 48 upwardly. As shown in Figs. 1 and 2, the free end. of erector 48 abuts against the underside of bracket 23. An auxiliary arm 5| guided by pin and slot means 52, 53 serves for moving a bell crank 54 (Figs. 5, '7) one arm of which projects into the casing l and which is secured by means of a screw 55 to a bracket 56 amxed to the outside of casing i. That leg 55 of bracket 56 which stands ofi casing i, constitutes a cutting blade, as does also the corresponding arm 54 of bell crank t l, whereby a pair of scissors is formed.

To the said casing outside a bearing pin 5? is affixed on which is pivoted a detachable spool which supplies the required thread. The latter runs over a fixed guide pin Ell, between a pair of discs 6| acting as a brake, transversely through a passage 62 provided on the casing above the bracket 23, via a second disc brake 63 disposed on that casing outside which is opposite to the said casing outside, the second disc brake applying a more pronounced braking action than the first. The taut thread 58 is inserted into the recess 20 of the loop-forming needle i8.

The apparatus described is used as follows:

The operator or inspector grips the two handies 2, 3 in one hand, the major portion of the weight of the apparatus thus being situated near the operators hand, whereby the manipulation of the apparatus is facilitated and the operators hand is less quickly fatigued than when such major weight portion was situated more in front of the apparatus. The selvage A (Figs. 16-18) of the cloth to be checked then is inserted, at the point to be marked, into the aperture 572 of the apparatus so as to rest on the bracket 23, the casing-wall 28 (Fig. 5) serving to check the relative position of the salvage with respect to the vertical needle l8 and the erector l8 opposite thereto. The handle 3 then is pulled up against the action of a spring 64 attached thereto, the swing of handle 3 being limited by a stop (not shown).

As to-and-fro swing thus is imparted to bell crank 22 by the cam in on the cam path 9 provided on the segmental rack 9, and the needle is thus is reciprocated. The needle 18 which by means of nose 2| engages the thread 59, pulling same oif supply roll 58, penetrates the se lvage A so as to form an open loop a which (Fig. 9) is situated on the salvage underside.

During said movement of handle 3, the rack 6 via pinion I imparts half a clockwise revolution to cam 31, the presser 22 through the arm 2'; being moved at the very beginning of said. movement against the bracket 23 in order to locate the selvage A between the bracket and presser, whereby a faultless operation of needle IB is made possible, the latter at once returning into the initial position. When the needle 18 is moving downwardly, the auxiliary arm 51 also moves downwardly and rocks bell crank 54 (Fig. '7) against the action of a torsion spring (not shown) so that the thread end-portion engaged by the needle i8 is cut oil the supply thread 59. During said half revolution of cam 31, the depression 33 thereof moves within range of the cross-pin 39 whereby the slidable member 46 through arm 35 is moved so that the erector 48 projects through the slot provided in bracket 23 and swings upwardly in order to tip the loop a of the thread 59 over the selvage A and to erect such loop, as shown in Fig. 10.

After the needle i8 has returned to its initial position, grip 3 is released and swings back to its position of rest, being biased by spring 84. The rotation imparted thereby to pinion 1 through segmental rack 6, remains ineffective by virtue of the free-motion means provided, 1. e. cam 3i is not rotated. The grip 3 then is swung a second time from its position of rest, the needle is being reciprocated again (but ineffectively this time) and cam 31 being given another half revolution so that it moves back to its initial position as shown in Fig. 1. During such latter rotation of earn 3!, the arm 34 is swung to and fro through cross-pin 38, whereby the looper 42 is horizontally reciprocated via the sliding member ii}. In the forward stroke of such reciproeating movement, the looper 42 projects through the loop a which is disposed in its path of movement, and engages the leg 12 thereof by means of a hook provided on looper 42. The said leg I) then is drawn through the loop a so as to close the thread loop. When cam 3i turns further, the sliding member 46 at a given moment is restored to its initial position, whereby the erector r it is swung back to the inoperative position. The

presser 22 also is restored to its position of rest, such restoring movement being limited by the horizontal leg thereof striking against the lower edge of guideway 24. As soon as the movable grip 3 swings back to its position of rest, the tool again is in the position of rest, whereupon it be used anew in the manner described.

. It will be readily appreciated that the tool described may be considerably varied in detail. The looper 42 and the sliding member 46 provided with the erector 48, for example, could be manually operable, for instance by means of a common operating handle.

Instead of pulling only one thread-loop leg through the loop a both loop legs could be pulled therethrough, as set forth in the second form of invention shown in Figs. 12-18, in which the looper is formed as tongs.

The second form of invention is suited for using a thread made of a material, e. g. plastic, of which the loop may be readily deformed or flattened by outside forces so that the opened tongs may pass therethrough.

in Figs. 12-18 of the second form of invention, parts and portions like and similar to those of the first shown in Figs. l-ll are indicated by the same reference characters.

As shown in Fig. 12, the presser 22 is secured to a bell crank ll! which is pivoted on an axle pin 11 and has atone end a roller '13. The latter is biased by a spring 12 to ride on the periphery of the cam 35 through which, on actuating the tool, the presser 22 is rocked downwardly and temporarily held against the bracket 23. To the vertical leg 22a of presser 22 is afiixed a plate 14 comprising two horizontally opposite bearings 15 to each of which is pivoted an abutment 11 on a pin 16, which stop normally is held in a position of rest through a leaf spring 18.

A shaft 19 is mounted in sliding member 40 which is actuable from cam 3 I, and has a flat extension 19a to which the two tong-forming twoarm levers 42a are pivoted on a pin 80. The nipper arms of said tongs face the needle l8. The rearward arms of the tongs are interconnected by a coil spring BI and a resilient wire bow 82 whereby the tongs normally are held in closed position so that they may be readily opened by a slight counterpressure on the rearward arms of the tongs. Each of the latter arms has a lateral lug 83 adapted to cooperate with the two abutments ll pivoted to the leg 22a of presser 22.

The mode of operation of the second form of tool is similar to the first form. When using the tool, the loop-forming needle I8 is reciprocated as in the first form of invention. During the downward stroke, the needle [8 through nose 21 engages the thread 59 which previously has been laid ready as required, said thread being derived from a supply spool disposed on the tool and being guided through elements provided on casing i. The needle l8, drawing oiT sufficient thread from the supply spool, pierces the selvage A to form an open thread loop having a loop a (Fig. 16) depending from the selvage underside. Prior to such operation, the presser 22 has been moved toward the bracket 23 to locatethe selvage A therebetween so'as to allow the needle I 8 to faultlessly pierce the selvage A, whereupon the needle returns at once to its initial position. When the needle I8 is lowered, a pair of scissors is automatically actuated at a predetermined instant to sever the thread end portion engaged by the needle l8, from the supply thread 59. After the thread loop has been formed, the slidable member 46 is moved so that the erector 48 protrudes through the slot in bracket 23 and swings further upward to tip the thread loop a above the selvage A, as shown in Fig. 17. The originally elongated loop a of the thread which, being made for example of nylon or similar plastic, has a certain strength, thereby is flattened somewhat by the correspondingly formed erector 48, as shown in Fig. 17.

The slidable member 40 then is reciprocated. During the forward stroke of member 40, the latter moves the closed tongs 42a (Fig. 13) through the loop a (Fig. 17). 85 of the tongs coact with the abutments 7'! presented thereto by the presser 22, the tong-arms 32a are opened (Fig. 14). When, however, the lugs 83 have passed beyond the abutments i1 and to the rear of the two loop legs, the tongs 42a are closed under spring action. During the rearward stroke of the tongs, the two loop legs I) and c are taken along by the tongs 42a and passed through the loop a so as to close the loop. When, during such rearward stroke of the tongs, the lugs 83 engage the abutments ii, the latter are temporarily swung aside against the action of their springs 78 so that they remain inactive with respect to the tongs, i. e. the latter remain closed. At a given moment, the slidable member 46 is moved back to its initial position, the erector 48 being restored to its inactive position, and the presser As soon as the lateral lugs.

22 also is swung back to its position of rest. After the tool is at rest again, it again may be put in operation in the manner described.

It will be appreciated that the apparatus disclosed herein also may be used for other operations besides marking weaving-faults in cloth, such as for example to apply binding strings to flying labels.

What I claim and desire to secure by Letters Patent is:

1. A manually-operated apparatus for marking weaving faults in cloth by means of thread loops passed through the selvage when inspecting the cloth, comprising a casing having a selvagesupporting bracket integral therewith, a needle movably guided in the casing, a looper disposed substantially at right angles to the needle, a thread supply spool and thread-tensioning means mounted on said casing, a thread-severing device mounted on said casing, the needle being adapted to engage and draw thread from said spool, a presser movably guided in the casing, means for reciprocating the presser to temporarily locate the selvage on said bracket below the needle, means for reciprocating the needle to pierce the selvage and form an open thread loop depending from the selvage underside, means for actuating the thread-severing device in dependency on said movement of the needle, a pivoted lever forming an erector located below said needle on said casing adapted to bend the loop upwardly about the selvage and in line with the path of movement of the looper, means for reciprocating the looper subsequently to the reciprocating movement of the needle, to pass through the upstanding loop hook portion and seize one leg thereof to pull same through said loop on the rearward stroke to complete the marking operation.

2. An apparatus as set out in claim 1, in which the erector is pivoted to a slide member and disposed below the bracket, the latter being apertured for the passage of the erector therethrough.

3. A manually-operated apparatus for marking weaving faults in cloth by means of thread loops passed through the selvage when inspecting the cloth, comprising a casing having a selvagesupporting bracket and a fixed handle, a needle movably guided in the casing, a thread supply spool and thread-tensioning means and a threadsevering device mounted on the casing, the needle being adapted to engage and draw-oil thread from the spool, a presser movably guided in the casing, means for reciprocating the presser to temporarily locate the selvage on the bracket and below the needle, means for reciprocating the latter to pierce the selvage to form an open thread p depending from the selvage underside, means for actuating the thread-severing device in dependency on the needle movement, a pair of tongs mounted on the casing for reciprocable movement substantially at right angles to the needle, means for opening and closing the tongs during their reciprocating movement, a pivoted lever forming an erector located below said needle on said casing adapted to bend the loop upwardly about the selvage and in line with the path of movement of the tongs, means for moving the erector in and out of its operative position, means for reciprocating the tongs to pass same in closed state forwardly through the upstanding loop and open the tongs to seize the two loop legs and close the tongs to pull said legs rearwardly through the loop to complete the marking operation, a spring-loaded actuating element pivoted to the casing in opposition to said fixed handle, and cam means for the timed actuation of the presser, needle, thread-severing device, erector and looper in that order, the said cam means being operated through said actuating element.

4. An apparatus as set out in claim 3, in which the tongs are mounted on a slide block and have lateral lugs, and spring-loaded abutments are pivoted to the presser to coact with said lugs to temporarily open the tongs against spring action on their forward stroke after having passed through the upstanding loop to seize the loop threads, the said ahutments during the return stroke of the tongs being temporarily displaced by the latters lugs so as not to bias the tongs which thus remain closed.

5. Apparatus as claimed in claim 1, including a spring-loaded actuating element pivoted on the casing, said element comprising a segmental gear and a cam path having a central cam, a cam disc journaled on the casing, a pinion meshing said segmental gear and mounted for rotation with the cam disc in one direction only, a presser reciprocating means comprising a spring-loaded arm pivoted to the casing and a follower on the arm for coaction with the cam disc, a needle reciprocating means comprising a spring-loaded bell crank pivoted on the casing, one end of the bell crank carrying a follower for coaction with the central cam and the other end being pivotally connected to the needle, means for actuating the thread-severing device comprising an arm pivoted to the bell crank for actuation therewith, an erector actuating means comprising an arm having a follower and pivoted at one end to the casing, and a spring-loaded slidable horizontal member pivoted to the other end of the arm, and'a looper actuating means comprising a spring-loaded arm having a follower and being at one end pivoted to the casing and at the other end to the looper, 0n the first efiective actuation of the said element the presser, the needle, the thread-severing device and the erector being reciprocated in that order, whereupon the said element returns to its initial position while the cam disc remains in place, and on the second actuation of said element the looper being reciprocated through the cam disc, after which the apparatus is again in its initial position.

6. Apparatus as claimed in claim 1, said needle having an upwardly inclined recess along the shank thereof and adjacent to the tip thereof, said recess defining a downwardly extending shoulder along the upper edge of said recess providing a nose.

Volk Jan. 6, 1948

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