US2369990A - Pinch type comb - Google Patents

Description

Feb. 20, 1945. F, A STUHLMAN ET AL 2,369,990

PINCH TYPE COMB Filed March 5l, 1943 2 Sheets-Sheet 1 :j 5K6 y ky 5a p70 76 Feb. 20, 1945. F. A. STLJHLMAN Em 2,369,990

PINCH TYPE COMB Filed March 5l, 1943 2 Sheets-Sheet 2 Patented Feb. 20, 1945 PICH TYPE CMBY Frank A. Stuhlman, ForestPark, and Louis B.

Berg, Chicago, Ill., assignors to' Borg-WarnerV Corporation, Chicago,Ill., a corporation of Il linois.

ApplicationrMai-ch 31, 1943, Serial-No'. 481,182

Claims. (CI. M01-f3) This invention relates to weaving machines and the like. More particularly, the invention is directed primarily to improvements in a weaving machine of the type disclosed in United States Letters Patent No, 2,223,317, issued to W. B. Ewing, November 26,1940, for the weaving of metal cloth and the like. Further, it is an object of this invention to disclose animproved form of front and back comb assembly, Iand improved means for holding the elements of 'the metal cloth which is being woven.

It is an object of this invention to provide an improved means for guiding and positioning the woof or weft element, and for holding said weft element during the operation of tying the warp element.

It is a. further object of this invention to provide an improved means of holding the metal cloth during the stripping action when the forward comb moves out of engagement with the metal cloth, whereby the metal cloth materials will not be pulled out of place by the friction of the forward comb in its movements downward.

In constructions heretofore, such, for example, as that shown in the above-mentioned patent, there have been provided a plurality of comb elements called a forward comb and a back co-mb,

'the later of which has had what might be called a weft slot or fixed depth transverse groove or channel for guiding each ribbon-like weft member, and thev forward comb has moved up over this transverse groove to form the front` face for, and thus complete, the guideway. In this arrangement lthe transverse groove has had to be very carefully formed, and in the event the weft element was not entirely uniform, it might bind in the groove and fail to move into the proper' operating position.

In the present arrangementit is an object to provide. a forward. 'comb or front ,comb which is formed to provide both the front face and the bottom of a weft guidewav or slotandl a back comb which is formed to provide the back face and top of the slot so that by relative adjustment of the combmembers, various thicknesses and sizesof weft' members may be used for different grades ofy metal cloth; and binding andA snagging of the weitV members are. eliminated.

It is a further object to provide a means for positioning the front comb with respect to' the back comb while the weft element is' moved into the proper position, and then further positioning the iront comb element so'as' to pinch or clamp the-weft' element, securely holding itfagainst movement (but not distorting it) ,f while the warp wires are -being tied.v into position.

In connection with'the above-it isan object to provide Iarr adjustable'frontr comb' opening pin or screwvmember, which.l functions to raise or hold the front combmember from the back comb member by engaging abuier" member such asa carballoy blocken thev frame ofthe machine and effect a slight spacing opening'off the ribbon receiving slot.y facilitates the-introduction of a ribbon-like weft element'.y Itfis 'an' obje/ct to eliminate this slight opening after the intro'ducv tion.- of the weft into the slot, andrmo've the combs into' snug'.l engagement with the-ribbon priorl to making .the4 tie', Vwhich comprises` twisting or. knotting. the warpv elements back of each wefftelement.

It is an object to' providel an additional element. which .functions in connection. with the! weavingoperations involving thev combs, such;

means being what may' be termed` a, stripper bar assembly',whichY prevents thewoven vfabric or metallic cloth frombeingpulled forwardly or downwardly-by thevfricti'on; of-` thefront comb infruhbingagainst-the ribbonlike` memberV as the-'front combl is lowered.

Other andfmore'particular: objects, advantages land uses ot Amyv invention will become-"apparent fromv ay reading of. the following specification taken together with the'y appended drawings wherein: I

Fig'. 1 is a fragmentary elevationaL cross-sectional view of a portionzof a weaving machine head assembly-.

Fig. 2"is a fragmentary sectional' View.. taken on theI lneZ-Z of 1,"lookin'g in the direction of the arrows;l

Fig. 3fis1a fragmentary sectional'` view showing the positions'oithe combswith respect tothe y quill and frame, upon completion of-thetying operation;

Fig., 4 is ay `viewsimilar .to Fig... 3, but, showing the positionsoff the combsi inT thelnext step;4 fol'n lowing that o1Av Fig.y 3;v

Fig. 5fis aviewsim-ilar to 'thatfoi Figa 3,-but showing the next step after that ofFi'g.: 4

Fig. Bisi a viewsimilar tri that vof Figli 3'; but

,showing the' *position oi theVA combs.. foi-'the next step after that of Fig.: 5l, aridalso'r showing the opening` pin. and `buffer member; and

Fig'. rI"is1a-view similar' tothe-trof Fig.- 3; but showing the nal' positiorr of th'e como. elements prior to the tyingv operation. '1 The next position of the-combelem'ents isthatof Fig'. y

Referring more in:` detail to the.. construction shown in the various iigures andreferring first primarily to Figs. 1 and 2, there is provided a weaving machine head assembly 28, having a frame 22 and a comb assembly 24. Supported by the frame 22, there are provided the quills 26 (only one quill being here indicated). Each quill 26 is carried by a pinion 28 through which it extends and to which it is attached or held, and the pinion 28 is journalled for rotation in the frame 22.

The warp wires 30 are carried by the quill 26, and the pinion 28 with its attached quill 26 is driven by the rack 32. This rack 32 is mounted for reciprocating or oscillating motion, and the teeth of the rack engage the leaves of the pinion. The rack 32 is oscillated by the rack arm 34, which is mounted on the frame 32 and driven by any convenient means, such as a drum cam (not shown). The rack arm 34 has a cam roller 36 which engages a pair of blocks or the like 38 attached to, or forming a part of, the rack 32.

The frame 22 has a cover plate 48 which may be of glass so that movement of the pinion 28 is under observation, the cover plate being attached to the frame by any convenient means, such as machine screws 42.

Referring next to the comb assembly designated in its entirety as 24, there is provided a comb mounting support 44, which is here shown as being somewhat L-shaped. It extends substantially across the width of the machine. The comb mount 44 is attached to and carried by a 4movable carrier or comb support arm 46, which is journalled for limited arcuate movement on the frame 22. The journal means is not shown.

The comb mount 44 has seated thereon, with provision for sliding engagement therewith, a sliding block or comb advance member 48, which is retained in position principally by means of a retainer 58. Passing through the comb mount 44 in a hole or opening 45 provided for that purpose, is the movable comb advancing arm 52, which arm 52 preferably has at its outer end, a cam roller engaging the sliding block 48. This movable comb advancing arm is adapted to reciprocate said sliding block 48, with respect to said comb mount 44. The movable comb advancing arm 52 is journalled for rotation (by a means which is not shown and is preferably driven by a plate cam).

The comb mount 44 carries the back comb 54, which is attached to said comb mount and may be said to be integral therewith. This comb mount 54 has the outwardly extending ilange portion 56 on its upper end, which forms the top of the weft guideway or slot 58. A portion of the front face of the back comb 54 forms the back of the slot 58, and the back comb has means,

such as vertical slots, for passing the warp wires 30 from the quill 26 therethrough. The back comb 54 is recessed or concaved somewhat in its back face as shown at 60 to receive the end of the quill 26 and to provide space for the tying operation. This back comb 54 also has the hole 62 passing therethrough, for the purposes hereinafter described.

Attached to the sliding block 48 is the comb guide bar 64, which in the embodiment herein` disclosed, has a plurality of holes therein (see Fig. 2 in particular), one series of such holes carrying the coil springs 66. Another series of such holes carries the guide pins 68, each of which guide pins is free to move in a direction through said comb guide bar 64, and each of which guide pins 68 is threaded into, and forms a guide for, the front comb 10. These guide pins keep the front comb 'l0 aligned so that it can only move in a direction toward and from the comb guide bar (except, of course, said front comb l0 may move with the movement with the sliding block 48) A third series of holes carries what may be termed the adjustable opening screws or pins l2, which pins 12 are free to move with respect to the guide bar 64. The adjustable opening pins l2 are threaded through the front comb 10 and thus they are adjustably held in said front comb 18. Each pin l2 also passes through a hole 62 in the back comb, and said pins 12 are adjustable with respect to the front comb, and strike a carballoy block or the like 14. This carballoy block or the like forms a buffer or strike plate in the frame 22, and when the pin l2 is resting on said carballoy block, the front comb is held away from the back comb by a small space, for the purpose hereinafter disclosed. This space is regulable by adjustment of the pin l2.

The front comb 10 is provided with a forwardly or upwardly extending undercut nose portion 16, which is adapted to form the front face and bottom of the weft slot 58. This front comb l0 is urged at all times toward the back comb 54 under pressure oi the spring 66. This assures the fact that when the carballoy block and ad justable pin l2 are out of engagement with each other, the front; comb 18 will be in engagement with the back comb 54. Under the pressure caused by the adjustable pin 12, the front comb is kept outlof engagement with the back comb while the comb mounting support 44 is in close engagement with the frame 22.

The spring stop 18 is attached to the sliding block 48, by means oi the screw or bolt 80. The comb guide bar 64 is attached to the sliding block 48 by means of the machine bolt 82.

' The front comb 10 preferably is provided with a recess portion or spring seat, which receives and holds the spring 66. The spring 66 thus passes through the comb guide bar 64 and seats within the front comb 18, and then is tensioned and held by means of the spring stop 18. It is thus obvious that the front comb is movable with the comb support 44 in the same manner as the back comb 54, except that the front comb may be moved away from or toward the back comb within the limit provided by the adjustment above described, and the front comb moves with the slide block 48.

The comb arm 52 preferably is provided with the cam roller 84, which is jour-nailed within the sliding block 48. The retainer 58 has a recess or opening therein into which the end of the cam 84 may extend so that it has room for arcuate movement. The retainer 58 is securely held on the comb support 44 by means such as a machine bolt 86 and retains the sliding block in the desired position on the comb mounting.

The stripper bar 88 is provided in connection with the comb support 44, and is held in position by the stripper bar support 89 which is carried by the comb support 44. The stripper bar 88 extends over the upper end of the comb assembly 24, and forms a supporting surface or rest for the woven metal fabric as it comes from the comb. This woven metal fabric is thus supported by the quill 26, that is, by the warp wires passing through said quill, on the one side, and by the stripper bar 88 on the other side. Thus, when the front comb is pulled downward from the position shown in, Fig. 3 to that shown in the device being of thatgin Fig. 3 Labove-mene Fig. 4, releasing the woven fabric, the'support offered'by the quill, and the possible friction on the sides of the vertical slots of the back comb, together with support of the stripper bar, prevents the Woven metal fabric being pulled out of position. This is a very important feature, especially in connection with the weaving of metal fabric in which the weft is formed of a ribbonlike strip of elongated cross-section, and in which the fabric is practically uselessfor the purpose intended unless it has the proper optical characteristics-which optical characteristics are destroyed by distortion. Unintentional displacement of the fabric in weaving will, in all likelihood, distort the same.

Referring to Figs. 3, 4, 5, 6 and "I, always keeping in mind Fig. l, and referring first to Fig.

3, the positions ofthe parts shown in that ligure indicate that the tying operation of twisting the warp wires 3d about the Woof of weft 90 has just been completed.

The position of the parts in Fig. 4 is the Inext position after that of Fig. 3, and the front comb l has moved downwardly under the influence of the comb advancing arm 52, releasing the metal cloth. It will be observed that in Figs. 3 and 4, the back comb is spaced a considerable distance from the frame 22, and the front comb lies aginst the back comb 54. It will also be noted that the space between the back surface of the front comb and the quill is sufficient to perform the tying operation.

Referring next to Fig. 5, the back comb is now moved back against the quill 26 and toward the frame 22. The front comb still is drawn down away from the channel portion of the back comb,

but is lying against the back comb 54 for the reason that there is a slight angle between the comb assembly 261 and the frame 22, and the' pin l2 has not touched the frame 22 or block 14, as it will when the front comb is moved forward or upwardlyby the arm 52.

As noted in Fig. 6, the comb assembly has completed its movement toward the frame 22, the back comb seated against thev end of the quill, or close to it, and the front comb being spaced slightly outwardly from the back comb. This is accomplished by the adjustable opening pin l2 contacting the carballoy block 14, as the comb assembly moves up with the slide block 48. Under the influence of the adjustable opening pin 72, the front comb is forced outwardly away from the back comb, leaving the small additional space which results in a larger channel or ribbon slot 58. This space is, as above stated,

adjustable within limits by changing the adjustable pin l2. While the devicel is in this position, the woof or weft is inserted in the slot 58. As soon as this weft has filled the slot 58, the comb assembly under the influence of the movable support arm 46 moves outwardly to the position shown in Fig. 7.

In this position, the opening pin 'l2 does not contact the carballoy block, and the front comb, under the tension of the spring 6B, seats iirmly on the back comb or weft, or both, (whichever is tioned.

Attention is called to the fact that the .front comb 1D seats against-the 'backv comb 62 under the influence of the spring 66. This means that the weft element will be engaged onlyv under spring pressure. This is suicient to holdthe weft carefully and securely positioned during; the tying operation. i

With the construction here shown the parts forming the channel member 58 are slightly variableso that weft elements of different thickness may be readily accommodated therein. Also the fact that a weft .may have a awgn it, which, with thel construction herein disclosed, will not be prevented from seating in the proper position.

While we have described our invention in connection with certain specific embodiments thereof, it is to be understood that this is byway Vof illustration rather than limitation and thatfthe invention is to be dened by the appended 4claims which should be given a scope as broad as :coinmensurate with the prior art, l

We claim:

1. In a device of the class described, a comb assembly, a plurality of combs in said comb assembly, one of said combs for-ming top and back portions of a weft guideway, and another of said combs forming bottom and front portions of said guideway, means positioning said combs andincreasing the size of said guideway during a weft filling operation, and means decreasing the size of said guideway after the weft filling operation whereby any weft entering said guideway has ample clearance to do so and is clamped into position after having entered Saidv guideway.

2. In al weaving machine for metal fabricand the like, a comb assembly comprising a movable comb support, a quill assembly operable for performing a 'weaving operation, means adapted to move said quill rsupport in timed relation to the operation of said quill assembly, a back comb secured to said quill support, said back comb `having a fixed relation to said quill support, a front comb overlying said back comb, means operable to move said front comb with respect to said back comb in a direction toward the forward and rear edges of said back comb, separate means oper. able to space said front comb from saidv back comb, means in connection with said combs forming a channel of variable size, and means dening a stripper Ibar carried by said comb support.

3. In a device of the class described, a plurality of quills carrying warp means, means deining a portion of a weaving machine supporting and operating said quills, means deiining a comb support supporting a plurality of combs in adjustable relation to said quills, said combsdefining guideway forming means forming a guideway of variable thickness in cross section, and means forming and varying said guideway and the thickness thereof in'timed relation to the operation of said quill means.

4. In a device of the class described, a'plurality of quills carrying warp means, means defining a portion of a Weaving machinesupporting and operating said quills, means dening' a comb support supporting a plurality of combs in adjustable relation to said quills, said combs dening guideway forming means forming a guideway of variable thickness in cross section, means forming and varyingsaid guideway Vand `the thickness fthereof in timed lrelation to the operationv ofv said lquilllmea-ns,A and-means comprising a. stripper bar supporting the woven fabric y during the movement of said guideway forming means.

5. A comb assembly for weaving machines and the like comprising comb supporting means, variable means operable to position said comb supporting means, a back comb element on said comb supporting means, means carried bysaid comb supporting means dening a sliding block, a front comb element normally resting against said back comb element and moved by said sliding block, means positioning said sliding block whereby said front comb is positioned with respect to said back comb, means carried by said front comb operable to position said front comb in spaced relation to said back comb, and means urging said iront comb against said back comb.

6. A comb assembly for weaving machines and the like comprising comb supporting means, means operable to position said comb supporting means, a back comb element on said comb supporting means, means carried by said comb supporting means defining a sliding block, a front comb element normally resting against said lback comb element and moved by said sliding block, means positioning said sliding block whereby said front comb is positioned with respect to said back comb, means carried by said front comb operable to position said front comb in spaced relation to said back comb, means urging said front comb against said back comb, said back comb having a ange portion whereby the back comb forms the top and rear face of a weft receiving slot, and said front comb having an under-cut nose portion forming the front face and bottom of said weft receiving slot.

7. In a weaving machine having a quill means and means operating said quill means, a comb assembly for weaving machines and the like comprising comb supporting means, means operable to position said comb supporting means, a back comb element on said comb supporting means, means carried by said comb supporting means defining a sliding block, a front comb element normally resting against said back comb element and moved by said sliding block, means positioning said sliding `block whereby said front comb is positioned with respect to said back comb, and means carried by said vfront comb operable to position said front comb in spaced rey lation to said back comb, and means urging said front comb against said back comb.

8. A weaving head assembly for a weaving Inachine comprising a quill means carrying warp wires, means operating said quill means in performing weaving operations, a weaving machine frame, a comb support journaled for arcuate movement with respect to said weaving machine frame, a back comb carried by said comb support and defining the back face and top of a weft guide, a front comb carried by said comb support, and adapted to engage the front face of the back comb with the back face of the front comb, means in connection with the front comb forming the front face and -bottom of said weft slot, and means varying the depth from front to back of -said weft slot in timed relation to the weaving operations.

9. A weaving head assembly for a weaving machine comprising a quill means carrying warp wires, means operating said quill means in performing weaving operations, a weaving machine frame, a comb support journalled for arcuate movement with respect to said weaving machine frame, a back comb carried by said comb support and denning the back face and top of a weft guide, a front comb carried by said comb support, and adapted to engage the front face of the back comb with the back face of the front comb, means in connection with the front comb forming the front face and bottom of said weft slot, and adjustable Ameans varying the depth of said weft slot during weaving operations.

l0. A weaving machine having a frame means and quill means carried thereby, warp wires carried by said quill means, a comb support, front and back combs carried by said comb support, said front comb being adjustable with respect to said back comb for defining with said back comb a weft receiving guideway, means moving said front comb away from said guideway position after a weft has been inserted therein, and means carried by said comb support defining a stripper bar retaining said warp and weft means against displacement by said movement of the front comb away from said guideway position.

11. In a weaving machine an improved weaving head assembly therefor, said weaving machine having quill and quill operating means, warp elements carried -by said quill, a comb supporting means having a. fixed back comb thereon, said back comb defining a portion of a guideway for a weft element, a movable front comb, said front comb defining at least a portion of the remainder of the guideways for the weft element, a strike plate carried by said weaving machine, means operable to position said front comb with respect to said back comb for defining said guideway, and adjustable means carried by said front comb cooperating with means such as said strike .plate carried by said weaving machine spacing said front comb from said back comb during the weft guiding operation, and means eliminating vsaid spacing in said guideway after completion of the weft guiding operation.

12. In a weaving machine, quill means defining warp wire carrying elements, means operating said warp wire carrying elements for performing a weaving operation, means defining a comb means having front and back combs, said back comb having means forming the back face and top of a weit guideway and said front comb havingl means forming the bottom and front face of said guideway, Variable means positioning the combs relative to each other to complete said guideway, means varying the depth of said guideway from front to back, means varying the relative positions of said comb means and said quill means during the weaving operations, and means f defining a stripper 'bar at least partially supporting said weft and warp elements during the weaving operations against undesirable displacement.

13. An improved comb arrangement for a weaving machine having a quill and quill operating means, said comb arrangement comprising in combination a comb support, a movable arm for said comb support, a back comb carried by said comb support and movable therewith, a sliding block carried by said comb support, a second movable arm actuating said sliding block with respect to said comb support, a retaining means retaining said sliding block in position on said comb support, a guide bar attached to the end of said sliding block 'and movable therewith, a front comb between said guide bar and said back comb and movable with respect to said back comb, guide pins carried by said front comb and seated in said guide bar, said guide pins being axially movable and retaining said front comb under the4 inuence of said slide block, spring means urging said front comb against said back comb, means comprising a carballoy strike plate carried by said weaving machine and an adjustable opening pin carried by said front comb operable to space said front and back combs apart, means in connection with. said combs forming a Weit receiving guideway therebetween, the spacing of said combs apart increasing the size of said guideway for the weft filling operation and said combs returning together decreasing the size of said guideway after the weft filling operation whereby-any weft entering said guideway has ample clearance to do so and is clamped into position after having entered said guideway.

14. In a weaving machine for weaving metal fabric and the like, a quill assembly supported by said weavingr machine and including rotatable quills and driving means therefor, and an improved comb assembly means comprising a co-mb support, variable means positioning said comb a support with respect to said quill means during the weaving operation, means defining a slide block carried by said comb support, a back comb carried by said comb support in xed relation thereto, said back comb having a hole therethrough and having an outwardly extending ilange portion on its front face and a quill receiving recess in its back face, a front quill adapted to seat against the front face of said back quill below the flange portion and movable toward and away from said flange portion, said front quill having an undercut nose portion, a guide bar carried by said slide block and overlying said front comb, means comprising guide pins moving said front comb with respect to said back comb as above described under impulse of movement of said guide block, means comprising a spring urging said front comb against the front face of said back comb, and means comprising an adjustable pin carried by said front comb and operable to space said front comb a preselected amount from said back comb when the nose of said front comb is in close proximity to the flange of said back comb and the comb support has been moved to a position Where the back comb and the quills are in their closest proximity.

15. In a weaving machine for weaving metal fabric and the like, a quill assembly supported by said weaving machine and including rotatable quills and driving means therefor, and an improved comb assembly means comprising a comb support, variable means positioning said comb support with respect to said quill means during the Weaving operation, means dening a, slide block carried by said comb support, a back comb carried by said comb support in xed relation thereto, said back comb having a hole therethrough and having an outwardly extending ange portion on its front face and a quill receiving recess in its back face, a front quill adapted to seat against the front -face of said back quill below the flange portion and movable toward and away from said flange portion, said iront quill having an undercut nose portion, a guide barcarried by said slide block and overlying said front comb, means comprising guide pins moving said front comb with respect to said back comb as above described under impulse of movement of said guide block, means comprising a spring urging said front comb against the front face of said back comb, and a stripper bar over the upper end 0f said comb assembly and carried by the means supporting said comb assembly.

- FRANK A. STUHLMAN.

LOUIS B. BERG.

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