US2893439A - Loom - Google Patents

Description

July 7, 1959 I Filed Jan. 4, 1954 J. RABEYUXV ET AL LOOM 4 Shets-Sheet 1 INVENTOR LIZ-4N R4350 ATTORNEY y 1959 J. RABEUX EIAL 2,893,439

LOGM

Filed Jan. 4, 1954 4 Sheets-Sheet 3 Inc s.

/ INVENTQR ATTO R N EY July 7, 1959 Filed Jan; 4, 1954 J. RABEUX ETAL LOOM 4 Sheets-Sheet 4 1 .IL. T ga INVENTOR JEAN IPHBEUX a 330! ATTORNEY LOOM Jean Rabeux, Paris, and Bernard Masson, Courbevoie, 7 France, assignors to Societe dApplications Generales d Electricite & de Mecanique, Paris, France Application Januar-y 4, 1954, Serial No. 402,188 Claims. (Cl. 139-13) This invention relates to looms, and more particularly to themechanisms for drawing-off a tubular fabric woven on a circular loom.

' An object of this invention is to equip a circular loom with a drawing-off mechanism by means of whichv the tubular fabric may be drawn off in such a manner that the weft threads thereof are not deformed and that the edges of the fabric are perfectly straight and may be superposed after the cutting of the fabric.

A further object of the invention is to provide a circular loom with a weaving ring or a set of weaving rings and a support for such weaving rings, by means of which a great variety of different sizes of the width of the fabric may be readily obtained and the adjustment of the loom from one size to the other may be performed in a short time.

Another object of the invention is to provide a circular loom with a weaving room of comparatively small height.

A further object of the invention is to provide a circular loom with a weaving ring which may be used for different sizes of the width of the fabric.

- Another object of the invention is to provide a circular loom with a support for a' Weaving ring which permits an easy removal of linter or the like.

A further object ofthe invention is to assure a progressive flattening of the tubular fabric during its drawingoif and to avoid the formation of longitudinal pleats or wrinkles therein. 1

Another object of the invention is to provide a circular loom with means subjecting the fabric to a transversal stretching action during the drawing-01f of the fabric for obtaining a uniform width of the fabric.

A further object of the invention is to provide a loom with means delaying the actuation of the drawing-01f mechanism for a predetermined time after the start of the loom, for example after a weft breakage, so that a predetermined number of weft threads may be laidby the shuttles without an advancing of the fabric so as to assure a sufficient density of the Weft in the fabric when the loom is started.

Another object of the invention is to provide a loom with means which permit the interruptionof the actuation of the drawing-off mechanism at predetermined intervals while the shuttles are in operation, so that weft reinforced portions of the fabric may be obtained where desired.

Other objects and advantages of the invention will become apparent from the detailed description thereof in connection with the accompanying drawings forming part of this specification and showing, by way of example, some embodiments of the invention.

In the drawings:

Fig. .1 shows diagrammatically, partly in section, an elevational view of a drawing-01f mechanism for a circular loom according to the present invention;

Fig. 2 is an elevational view, partly in section, on an enlarged scale, of a part of Fig. 1, showing the weaving ring nd t PP P J hemes can be used in connection Fig. 3 is a top plan view of the parts shown in Fig. 2;

Fig. 4 is an enlarged elevational view of parts of Fig. 2, partly in section;

Fig. 5 is an elevational view, partly in section, of'a modified embodiment of the weav' g ring and the sup ports thereof;

Fig. 6 is a plan view of parts of the drawing-01f shown in Fig. 1;

Fig. 7 is an elevational section of the rollers of the draw-01f mechanism shown in Figs. 1 and 6;

Fig. 8 is an elevational section of a modified arrangement of the rollers shown in Fig. 7;

Figs. 9 and 10 are front and side elevations, respectively, of a device for straightening the fabric before it passes through the draw-off rollers shown in Figs. 1, 7 and 8;

Fig. 11 is an elevation of an additional device which with the device shown in Fig. 1;

Fig. 12 is a wiring diagram of an electro-magnetic delaying control of the draw-01f mechanism shown in Fig. 1;

Fig. 13 is an elevation of a mechanical delaying control of the draw-01f mechanism shown in Fig. 1;

from a largest ring 1a to a Fig. 14 is a plan view of a part of the control shown in Fig. 13; and

' Fig. 13a is a wiring diagram for the mechanism shown in Fig. 13.

Referring now to the drawings, and first to Figs. 1-4, a weaving ring 1 rests on supporting arms 2 hinged, re-

spectively, to base members 4 of the loom by means of pins 3. The swingable arms 2 are arranged at such a distance from each other that rings of difierent sizes smallest ring 1b may be mounted thereon in the loom.

The weaving ring-arm assembly 1, 2 is such as to allow one to center the weaving ring 1 with respect to the main' axis of the loom and to bring the upper curved edge 102 of the Weaving ring 1 to coincidence with the mean horizontal plane of the shed f. In order to accomplish this,.the upper ends of the arms 2 are shaped as tongues 5 engaging grooves 6 milled at the desired angle into one end face of the weaving ring 1 (Figs. 2 and 4).

The Weaving ring 1 and the hinged supports or arms 2 thereof determine the width loom. The arms 2 allow one to place all the weaving rings 1 covering the series of sizes which can be produced on the loom, into position in a rapid and simple manner, thus omitting any intermediate member.

Fig. 5 shows a similar mounting arrangement for a modified embodiment of a weaving ring 104 permitting the alternate use of two profiled edges 7 and 8 of the latter. According to Fig. 5, the diameter D of the --circumference of the edge 7 is slightly larger than the of the circumference of the edge 8; how-[ diameter D" ever, if desired, the diameters of said two circumferences could be equal. When the diameters are of different length, one and the same ring may be used for adapted forengagement by the tongues 5 of the arms 2. Either the edge 7 of the weaving ring 104 is in the upper active position, the arms 2 engaging with the tongues 5 thereof one of the grooves as shown in Fig. 5, or the edge. 8 of the weaving ring 104 is in.- the upper active position and the groove 108 is en.-

gaged by the tongue 5 of the arm 2. Thus the weaving ring 104 can be used with an upper active edge which is either theedge 7 having the larger diameter D, as shown in Fig. 5,. or the edge 8. having the smaller diet -.D...

of the fabric made by the 1 The arrangement described hereinabove allow one to use weaving rings of a reduced height which consist only of rolled and machined steel bands. Furthermore they allow the free removal of the waste or. linters through the free spaces. provided between the arms 2.

Referring now once more to Fig. l, and to Figs. 6 and 7, two draw-off rollers 23, 24 are arranged below the weaving ring 1 for drawing-off the cloth 110,. The, rollers 23' and 24 are driven as follows:

A pinion 9- keyed to'the main driving shaft 10 of the loom, transmits its rotation to a gear 11 rigidly connect-- ed tov one part 112 of a claw coupling the. other part 12 of which is rigidly connected to a shaft 13 transmitting the rotation thereof by a train of gears 14, 15, 16, a universal joint 17, a shaft 17, a. universal joint 17" and. a train of gears 18, 19, 20' to a worm 21' being in mesh with a worm gear. 22. keyed to the shaft 114 of the lower draw-off roller 23. The upper draw-off, roller 24 is rotated'by agear 25 keyedto theshaft 114 andin mesh with a gear 26 keyed to the shaft. 116 of said upper draw-off roller 24 which is kept under pressure against the roller 23 by springs 27 (only one being shown), the tension of which can be adjusted by. means of an adjusting screw 28.

Thus, the fabric 110 being caught between the twodraw-off rollers 23, 24 is drawn-ofl by the same. Preferably, a suitable lining or layer (not shown) is applied to the draw-off rollers 23, 24 so as to-increase the-adhesive action for pulling on the fabric. should be chosen according to the quality of. the fabric 110 and may consist, for example, of sand paper, emery. cloth, a material made of a knurled ribbon providedv with picots, etc.

The fabric 110 after leaving the draw-off rollers 23, 24. passes ever part of the surface of an additional roller 29 from which it passes to a delivery roller 30 with which it is. held in contact by a freely rotating pressure roller 31. The drive of the rollers 29 and 3.0 will be described more in detail hereinafter.

As will be seen from the device so far described, the drawing-off pull on the fabric is exerted by a homogeneous assembly separated from the main part of the loom. This assembly can be arranged in all desired positions in such a way that the pull exerted on the fabric coincides with the vertical axis of the loom.

The drive of the draw-01f assembly can be carried out in several ways; either by a mechanical. drive actuated by the main driving shaft of the loom through the medium of a suitable connection including means such as universal joints or a chain (shown in Fig. 1 for example); or by an independent speed-reducing electric motor. controlled by the main controlling switch of the loom and a relay (not shown, in, the drawings).

The mechanical actuation of the draw-off assembly by a Worm and a worm gear described more in detail here.- ina'bove, involves the advantage that the movement is irreversible, i. e. that uponastopping of the drawing oif movement the tension of the cloth and the warp threads. cannot cause a rotation of the draw-off rollers-in theopposite direction.

Furthermore, the assembly may comprise a delivering system conceived to allow either the descent of the fab-- ric to a. lower level or, with a suitable deflecting orre turning device including, for example, above described rollers 29 and 30, the storing of the fabric at the plane where the assembly ismounted.

After being released from the delivery'roller 30 the fabric. 110 drops vertically downward. and places itself under the. action of: its ownweight iniregularfolds 118 on the floor 120 (.Fig. 1 in a box (not shown), or'an The lining.

- ments described 4. ranging itself in regular folds may be assisted in doing so by an eccentric (not shown).

The strength of the pull on the fabric 110 which determines the density of the weft, may be changed by exchanging the gears 14 and 20. Owing to the irreversibility of the worm drive 21, 22 any reverse motion under the effect of the tension of the fabric and the warp threads is rendered impossible during a disengagement of the elements 12 and 112 of the claw-coupling.

The tubular fabric 119 produced in the weaving ring 1- is' pulled downwardly by the draw-01f rollers 23 and 24 (Figs. 1 and 7) driven positively by the driving elein detail hereinabove. During the downward movement of the tubular fabric 110 the latter is flattened and its two sides I and II are placed upon each other during the passage through the draw- 01f rollers 23 and 24 and after discharge therefrom. In order to' avoid any disorder or deformation of theweft threads the draw-off rollers 23 and 24 are so arranged that the.

fabric 110 is in contact with the same alongpart-cylindrica-l surfaces which are equal for each side of' the fabric 110. Underv these conditionseach side is taken along;

with an adhesion having the same value for fbothsides so that they have the same length before they reach the delivery roller 30 secured to the shaft 124 (Fig. 6),.

The side I of the fabric 110 is in contact with the rollers 24' and 29, respectively, along part-cylindrical surfaces subtending angles 0: and ,8 at the axes of the rollers. The side 11 of the fabric 110 is in contact with the rollers 23 and 30, respectively, along part-cylindrical surfaces subtending angles (1 and mat the axes of the rollers. The arrangement is such that angle a equals angle a; and angle 8 equals angle 5 According to the modification shown in- Fig. 8 the fabric 110- descends vertically to the next lower floor after emerging from the draw-off rollers 23 and 24. Gripping rollers 32 and 33 (substituted for the rollers 29 and 30 of Figs. 1 and 7) are arranged in the next lower floor for gripping engagement with the fabric 110. The gripping rollers 32 and 33' are positively driven by suitable. means in the directions of the arrows shown in Fig. 8.

The-strength of the pull on the fabric 110 is determined by the speed of rotation of the draw-off rollers 23 and 24. when the fabric is subjected to the rather sudden change of direction caused by the smooth roller 29 (see Figs. 1 and 7'), the latter is driven at a speed of rotation being slightly larger than the speed which corresponds to the linear speed of the drawn-off fabric.

Inorder to stretch. the fabric 110 between the rollers 29 and 30a sprocket wheel 34 connected with the roller 30 is likewise driven at a speed of rotation being higher than the speed corresponding to the linear speed of the drawn-off fabric 110'. the roller 30 through the medium of an adjustable friction coupling 35. The roller 30' is covered with an adhesive layer.

The adjustment of the degree of friction depends on the kind of fabric to'be woven. The different speeds are imparted to the rollers 29 and 30-by sprocket wheels 36, 37 and 34 meshing with an endless chain 38. The

- sprocket wheel 36 rigidly connected tothe shaft 114 openzbasket (not shown), or on a trolley'122'standii1g on=thefloor 120 (Fig. 11), the latter involving the advantage: of permitting a direct maneuvering thereof without removal of the load. If desired, the fabric ar allows to subject the fabric to a transversal tension and to assist in the formation of two folds in" the tubular fabric during the fiattening thereof before its passage through the draw-off rollers 23 and 24. This device" comprises two temples 55', 56 mounted on a cross-bar 57 by means of shiftable connecting pieces such as 132, which' maybefixecl in position by screws such as 1341. Thus the distance of the temples 55, 56 from each other In order to avoid the formation of folds or pleats The sprocket wheel 34 drivesis adjustable. The temples 55, 56 carry respectively, temple rollers such as 58, 59, 60 gripping the fabric 110 at each extremity thereof at the place of formation of the two opposite folds therein, shortly before the passage of the fabric 110 between the draw- oif rollers 23, 24. The temple rollers 58, 59, 60 are provided with helically arranged pricks (not shown) or with points (notshown) mounted on inclined discs. Said temple rollers are so arranged that the direct-ion of their rotation caused by the advancing fabric is such that their pricks or points penetrating into the fabric tend to spread the extremities of the latter outwardly. The thus stretched fabric is then conveniently delivered to the draw- ofi rollers 23, 24. The cross bar 57 is held in position by two arms such as 136 supported by the shaft 116 of'the draw-off roller 24.

According to the invention, the draw-01f assembly may be put under the control of a special device allowing to obtain at will or automatically the stopping or the putting back into operation of the drawing-off movement. This device may, for instance, allow to obtain a predetermined delay in the putting into operation of the drawing-off motion at the moment when the loom is started, or to obtain automatically the formation of reinforcing bands with a higher density of the weft at predetermined distances.

. For example, it may be desirable to cause a rotation of the shuttles for depositing some weft threads without drawing-off the fabric at the time when the loom is restarted after a breakage of the weft so as to obtain at this place. a regular, or even increased density of the Weft.

Furthermore, for example, in the weaving of fabrics intended for the manufacture of sacks, or bags, closely woven weft threads suitably distributed over predetermined zones allow to obtain sacks or bags which are reinforced only in those parts which are predominantly exposed to a risk of rupture; thus it is possible to manufacture more resistant sacks or bags at an appreciable saving of raw materials.

The present invention comprises from this point of view as well the principle of such reinforcements, as the products obtainable by such a process, no matter whether these are sacks, bags or other fabrics involving the effects resulting from closely woven wefts.

The period of stopping the draw-off movement of the fabric either upon restarting'the loom after a breakage of a weft thread or for obtaining zones of higher density of weft in the finished product should be adjustable. Such an adjustment may be either a function of time or a function of a predetermined number of revolutions of the shuttles, i.e. a function of a predetermined number of deposited weft threads.

The device according to the present invention may be designed so as to obtain one or the other of these two types of adjustment; the second type of adjustment pro duces more constant results because it eliminates the substantial variations in the closeness of the weft which are generally encountered upon a restarting of the loom after a' breakage of weft yarn, owing to differences between the accelerations which prevail at different restarting operations.

'For the first type of adjustment, as a function of time,

the device, for example, comprises the above described claw coupling 12, 112 controlled by the electromagnet,

40. Said claw coupling permits a stopping or restarting of the draw-off rollers 23, 24 independently of other operations of the loom. The electromagnet 40 is controlled by a system which comprises an adjustable time relay or a contact making clock. Said time relay orsaid contact maikng clock may be controlled by the weft stop motion for causing the delay of the restarting of the draw-oft rollers upon each start of the loom after a breakage of weft yarn, or it may be controlled .by'a re}.

tating electric contact device for stopping the draw-0E rollers during a predetermined period and at predetermined intervals so as to obtain reinforcing zones of closely woven weft threads.

For the second type of adjustment, as a function of a predetermined number of revolutions of the shuttles, the device, for example, comprises again the claw coupling 12, 112 controlled by the electromagnet 40. Said electromagne 40 is controlled by the weft stop motion or by a distributor depending on the desired effect. Furthermore, the device comprises a retarding system operating on the principle of storing a predetermined quantity of energy. This energy may be store, for example, by a spring, by the lifting of a weight, by the compression of a fluid, by an electromagnetic force, or by any other suitable means.

In both types of devices, the claw coupling and the electromagnet controlling same may be replaced by an electromagnetic clutch.

As shown in Fig.1, the armature 130 of the electromagnet 40 is connected with one arm of a double-armed lever 128, the other arm of which is connected to the element 12 of the claw coupling 12, 112. Thus, the drive of the draw- 01f rollers 23, 24 may be readily disengaged from the main driving shaft 10 actuating the shuttles of the loom (not shown) by an action of the electromagnet 40 on said double-armed lever 128. Thus, the drawing-off motion of the fabric may be interrupted at any moment, for example for the production of reinforcing zones with closely woven weft, or at the start of the loom after a breakage of weft yarn so as to avoid a thinning out of the fabric.

Various electrical and mechanical devices can be used for the control of the electromagnet 40 for these various objects. v

In the following only two embodiments will be described which permit a delay of the start of the drawingofi of the fabric after a breakage of weft yarn; these embodiments according to the invention cause a delay of the start as a function of time (embodiment shown in Fig. 12)

or cause a delay of the start as a function of the number of revolutions carried out by the shuttles (embodiment shown in Figs. 13 and 14).

Referring now to Fig. 12 of the drawings, the electromagnet 40 which controls the claw coupling 12, 112 shown in Fig. 1 has a winding 138 inserted in series to a switch 140 and a voltage source of, for instance, 220 volt A.C. The switch 140 is normally biased by a spring 141 in an open position and is under the control of the armature 142 of a time relay 41 having a winding 144 connected in shunt to a preferably adjustable condenser 42 the charg ing time t of which is adjustable in dependence on a potential determined by the resistive value of a variable resistor 43 connected with one terminal 146 thereof to the common terminal 148 of the adjustable condenser 42 and the Winding 144. The other terminal 150 of the variable resistor 43 is connected to one terminal 152 of a battery 154 the other terminal 156 of which is connected to a stationary contact 158 of a change-over switch generally denoted by 44. A movable contact 160 of the switch 44 is connected to the other terminal 162 of the adjustable condenser 42. The other stationary contact 164 of the change-over switch 44 is connected to one terminal 166 of a resistor 45. The movable contact 160 is biased by a spring in a direction toward the contact 164 the other terminal 168 of which is connected to the terminals 146 and 148 connected with each other. 160 is fastened to the armature 170 of an electromagnet generally denoted by 172, having a Winding 174.

As may be readily understood from above described Wiring diagram, the electromagnet 40 is controlled by the time relay 41, the time delay of which is controlled by the condenser 42 having a charging time t which may be adjusted for a given voltage by the resistive value of the The movable contactswitch 44 controlled, for example, by the weft stop motion acting-on the Wi'nding174 of'theelectromagnet 172.allows a-dischargeof the condenser 42 over the resistor 45 upon. each restarting of the loom.

Theretardedconnection of the electromagnet to a voltage'ceuld also be obtained by a contact making clock or clockswitch (not shown) released by a restarting of the loom.

Referring now to to Figs. 13 and 14, the device shown in said figures causes a delay of the start of the draw-oflf rollers as a function of thenumber of revolutions carried out by the shuttles.

The delay between-the actuation of the shuttles and the actuation-of-the draw-otfrollers is obtained by interposing' an element capable of storing a predetermined quantity of energy (for instance, a spring capable-of storing mechanical energy);

According to Fig. 13, the single shaft 17 of Fig. 1 between the two universal joints is replaced by two shafts 46- and 47- rotating freely one with respect to the other. The shaft 46 which is connected with the part 12 of the claw clutch through a train of gears 14, 15, 16 and ashaft 13' carries a disc 48 being keyed thereto and having a finger 49 against which'one end 175 of a torsion spring 50 abuts. The shaft 47 which is connected with the worm 21 through the trainof gears 18, 19, 20 carries a disc 51 rigidly connected with said shaft 47 by a safety bolt 52; A finger 53"- rivetted to the disc 51 at the same distance from theaxis 177 as the finger 49-serves as abutment for the other end 1760f the spring 50'.

The direction of rotation of the disc 48 is such that the finger 53 connected with the worm 21 is displaced by the finger 49 upon a winding-up ofthe spring 59 by the-latter. The fraction of the turn required for the winding-up of the spring 50 causes the desired delay.

At each declutching ofthe part 12 ofthe claw coupling the tensioned spring 50 abutting" against the finger 53 locked by the worm 21 andacting on the finger dfi secured' to the disc 48 causes a return movement of said disc 48 and, through the train of gears 14, 15, 16, of the part 12 of the claw coupling, until the adjustablestop 54 mounted onthe disc 48 makes contact with the'finger 55 secured'to the disc 51 so as to limit the desired retardation to an adjustable fraction of a turn.

A predetermined number of revolutions of the shuttles, Le. a predetermined number ofweft threadslaid withoutany drawing-01f of the fabric by thedraw-oifrollers cor responds to saidfractionofa-turn of'the disc 48 relative tothe disc 51 as indicated by the-angle -in Fig. 14.

The electromagneti tt not shown in Fig. 13; but shown in Fig. l, capable of disengaging the parts 12 and 112 of the claw conpling'fromeach other, is directly controlled by an electric contact of the weft stop motion, when the retarding device shown in Figs. 13 and 14 is used. In- Fig; 1 311 the direct control-by a-coil"1-74-' of an electromagnet 172 having anarmature 142 actuated by a contact of a weft stop motion.

It should be understood that numerous changes 'may be made in the form, construction, and arrangement of the several parts of the illustrated circular loom without depar-ting from the spirit and scope of our invention or sacrificing any of its attendant advantages; the forms herein described being merely for the purpose of illustrating the invention.

For example, while the drawings illustrate the mechanisms according to the invention in connection with a circular loom having a horizontal shed and a discharge of the cloth in the center of theloom, it is also possible to apply mechanisms according to the invention to different types of circular-looms and even to ordinarylooms.

What weclaim is::

1. A loom comprising in combination: a main drive for 'the weaving implements of the loom, an actuable draw-off mechanism for drawing-olf'fabric woven by the implements of the loom, actuating means operatively connected' with said draw-01f mechanism, coupling means havinga pair ofengageable coupling elements, one of said coupling elements being connected with said actuating means, the other coupling element being connected with said main. drive, automatic controlling means associated with said coupling means for engaging and disengaging the coupling elements of the latter, and delaying means associated with said controlling means, said delaying means being responsive to a start of said main drive for delaying an engaging action-of said controlling means for a predetermined time after the start of said main drive, said automatic controlling means including an electromagnet for action on said coupling means, a switch elec trically'connected with said electromagnet, and said delaying means being'associated with said switch.

2 A loom comprising in combination: a main drive for the'weaving'implements of the loom, an actuable draw-01f mechanism for drawing-01f fabric woven by the implements'of the loom, actuating means operatively connected with' said draw-off mechanism, coupling means having a pair of engageable coupling elements, one of said coupling elements being connected with said actuating means, the other coupling element being connected with said maindrive, automatic controlling means associated with said coupling means'for engaging and disengaging the coupling elements of the latter, and delaying means associated with said controlling means, said delaying means being'responsive-toa start of saidmain drive-for delaying an engaging action of said controllingmeans for a-predetermined time after thestart of said main drive, said automatic controlling-meansincluding an'electromagnet for. action on said coupling means, a switch electrically connected with said electromagnet, and said' delaying means including time relay'a'ssociated'with said switch.

31 A loomcomprising in-combination: a main drive for the weaving implements of the loom, an actuable drawoff mechanismfor drawing-01f fabric wovencby the implementsofthe loom, actuating meanscperatively connected with said draw-off mechanism, coupling means having a pair of engageable coupling elements, one of said coupling element's-being connected with said actuating means, the other coupling element being connected with said main drive,.andcontrolling means associated with said coupling means for engaging-and disengaging the couplingtelements of the latter, said actuating. means including delaying meansresponsive to astart of said maindrive for delayingan actuation ofisaid draw off mechanism bysaid main. drive through said coupling means for a predetermined time after the start of the main drive, said controlling means: including an: electromagnet for action on said couplingmeans, and means electrically connected with saidelectromagnet for energizing and deenergizing same.

4. A loom comprising in combination: a main drive for weaving implements of the loom, an actuable drawoif mechanism for drawing-off fabric woven by the implements of .the loom, actuating means operatively connected withsaid draw-oft" mechanism, coupling means having apair of engageable coupling elements, one of said couplingelements being connected with said actuating means, the other coupling element being connected with said main drive, automatic controlling means associated with said coupling means for engaging and disengaging thecoupling elements of the latter and adjustable delaying means associated with said controlling means, said automatic controlling. means including an electromagnet for, action. on said coupling means, a switch electrically connected with said electromagnet, said delaying means including a time delay relay connected to saidswitch, electrical. energy means connected to said time delay relay for actuating saiddelay relay, and means to disconnect saidelectrical energy means to said time delay relay, said delaying means being responsive to a start of said main drive for delaying an engaging action of said controlling.

means for a. predetermined time after the start of said main drive;

5. A loom comprising in combination: a main drive for References Cited in the file of this patent the weaving implements of the loom, an actuable draw-off UNITED STATES PATENTS mechanism for drawing-off fabric woven by the implements of the loom, actuating means operatively connected 63872 Butcher et a1 1867 with said draw-off mechanism, coupling means having a 5 1381004 cimpman 1873 pair of engageable coupling elements, one of said coupling 290,287 T1110 et a1 1883 elementns being connected with said actuating means, the 817,443 Palmer 1906 other coupling element being connected with said main 951451 Peterson 1910 drive, automatic controlling means associated with said 9585 Clegg May 1910 coupling means for engaging and disengaging the coupling 10 8'169 Marvel Sept 1912 elements of the latter, and adjustable delaying means as- 1'115338 Royle 1914 sociated with said controlling means, said delaying means 111291642 Chemach 1915 being responsive to a start of said main drive for delaying 1153'576 Royle Sept 1915 an engaging action of said controlling means for a pre- 1'259478 Bechtel 1918 determined time after the start of said main drive, said 15 1357967 Du Pray 1920 automatic controlling means including an electromagnet 1'748000 Stone 1930 for action on said coupling means, a switch electrically 1'820'846 Stone 1931 connected with said electromagnet to energize the latter, 2O56O39 Doerseln Sept" 1936 said delaying means including a time relay associated with 2,238,658 Pelee et a1 1941 said switch, and means to supply electrical energy to said 53: 3 1% time relay at predetermined conditions of loom operation. 2,343,135 crompton Feb. 29 1944 2,487,148 Latieule et a1 Nov. 8, 1949 2,713,353 Casati et al July 19, 1955 FOREIGN PATENTS 7,266 Great Britain of 1884

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