Abstract: This invention relates to a double coupling for removably joining twin pipes, wherein the two connectors of the male piece engage in parallel bores in the female piece, and one of them cooperates with a bolt mechanism which ensures removable assembly of the two pieces. In a variant, the bolt is disposed between the two bores in order to cooperate with the two connectors.

Abstract: This invention relates to a device for forming the shed in a weaving loom, wherein the elements which constitute the system for lifting the warp yarns are, from top to bottom, an electro-magnet, two blades, two mobile hooks and a lifting beam. These elements are disposed one below the other between two vertical separating partitions constituting an assembly. A certain number of assemblies are assembled in a row so as to form a module which may be selectively inserted within the loom frame.

Abstract: Levers with double roller assemblies for positive cam mechanisms for controlling the heddle frames of weaving looms wherein each roller assembly comprises a rotating ring supported on a plurality of roller bearings retained relative thereto on a fixed support mounted to or on extension of the levers. The rings and supports are thus capable of penetrating between the cams of the weaving loom without modifying the axial dimensions of an assembly of such cams.

Abstract: This invention relates to the shed forming devices in weaving looms wherein each of the retaining hooks is in the form of an element which is pivotable about a horizontal pin with each element provided with a tail portion which is subjected to the reaction of a compression spring so that the head portion thereof lies in a rest position above the toe of a corresponding mobile hook. When the mobile hook causes a retaining hook to pivot so that its nose or head is in an outer position with respect to the toe, an electromagnet of the device may be selectively activated to retain the retaining hook in this outer position to thereby prevent the mobile hook from being restrained by the retaining hook.

Abstract: This invention is directed to improved mobile hooks for the shed forming device of weaving looms wherein the mobile hooks are disposed at each of the ends of a funicular element. Each hook includes a web bordered by a vertical heel disposed in a slideway formed by grooves made in two opposing separating partitions with the web including a toe adapted to be hooked by the curved ends of a conventional blade element which is utilized to maintain the hooks in their uppermost elevated position. The hooks further include portions which are adapted to be gripped by conventional knives as the knives are moved vertically in reciprocating motion and also a push element adapted to displace the hook retaining blade against the core of an electromagnet which is used to selectively urge the retaining hook into engagement with the mobile hook when the electromagnet is activated.

Abstract: A lifting beam for the shed forming device in a weaving loom which includes a fork joint made in the form of two cheeks or pairs of opposing flanges having aligned openings formed therein through which the stub shaft of two pulleys are rotatably mounted. The pulleys are made of an appropriate plastic material which is overmolded over the metal pins or shafts with opposing grooves provided in the interfaces of the cheeks to facilitate positioning of the pins in the openings.

Abstract: The present invention relates to a hooking device for the semi-automatic connection of the heddle frames of weaving looms with the levers for controlling them. A locking ring is rotatably mounted and has a hexagonal or octogonal profile so that, once correctly oriented by abutment against a ramp, it is closely applied against corresponding bearing surfaces made in the opening of the opposed hook.

Abstract: The present invention relates to fast-fit unions for removably joining pipes, wherein a tubular lock element loaded by a spring carries on its inner wall three teeth offset axially of the union with respect to one another, the central tooth being provided opposite the other two so that, to unlock the two elements of the union, two successive inward displacement maneuvers must be exerted on the lock element, consequently allowing the compressed fluid time in which to be evacuated to the atmosphere.

Abstract: The invention relates to improvements in mechanisms for driving regulators of weaving looms. Between the shaft of the dobby and the chain pinion which drives the regulator of the loom there is interposed a differential reverser whose satellites are borne by a race axially moveable coil. The latter is moveable through the unweaving circuit so that the reverser is automatically actuated during unweaving and causes the regulator and the woven fabric to move backwards while the dobby continues to rotate in the same direction (electronic program).

Abstract: The present invention relates to electromagnetic devices for controlling dobbies and other weaving systems, wherein the control unit which contains the electro-magnets is borne by an oscillating frame on which is mounted an equal number of selectors associated with a spring which tends to move them away from the associated poles of magnetic attraction. Each selector acts selectively on the actuating hooks of the dobby, and a fixed stop ensuring its return into applied position against the magnet upon return into a non-actuating position. The device is applicable to the control of a dobby with double swinging levers or to the control of a rotating dobby.

Abstract: The present invention relates to improvements in rotating dobbies. The control of the coupling pawl for connection to the driving shaft is effected by one of two right-angled pivoting levers actuated in the same zone by push elements of the reading device of the dobby. When a lever engages in a notch in a plate fixed to the eccentric, the nose of the engaged one of the pivoting levers pushes a catch on the pawl which pivots the pawl causing the withdrawal of its finger to release connection with drive from the shaft.

Abstract: The present invention relates to an adjustable fastener for fastening pulling cables to the suspension levers of textile dobbies of the negative type, said fastener being constituted by two parallel side elements which support a pin for the pivoting connection of the fastener to the end of the corresponding suspension lever, a curved lower guide, and an upper stop provided with two forks which are traversed by threaded end pieces fixed to the pulling cables and which form support for adjusting nuts.

Abstract: The present invention relates to the system of angular connection of the eccentric of each element of a dobby either with the shaft or with the corresponding arm. This connection is ensured by a double hook borne by the eccentric and mounted to rock so that one or the other of its noses engages in a notch made in the periphery of a driving device fixed to the shaft, or in a notch in a bead of the arm.

Abstract: The invention relates to dobbies of the type with double swinging levers and fastening hooks, provided with an auxiliary actuating system ensuring functioning for a weave different from that corresponding to the conventional reading device. To this end, a cam is provided, of such section that, by an angular displacement imparted after the momentary retraction of the disc of the reading device, the heel provided on certain of the hooks is pushed, causing said latter to pivot. The invention finds particular application in the textile industry.

Abstract: The present invention relates to dobbies of the type in which each double swinging lever is controlled by two pulling hooks cooperating with pulling knives with reciprocal movement. Each non-selected pulling hook in each pair is raised away from the associated pulling knife by a stirrup coupled to a vertical rod having a gripper at its upper end, the gripper being selectively coupled to a raising knife under the control of the reading mechanism. The raising knife is raised or lowered by a vertical slide mechanism which is coupled directly by a connecting rod to a lowering knife of the dobbie, so that the slide mechanism and raising knife move up and down synchronously therewith. The invention finds particular application in the textile industry.

Abstract: In a reading device for dobby or other weaving mechanism with double swinging levers and retaining hooks, of the type in which said hooks are actuated by a disc with radial lugs or the equivalent, at least one input gear connected for rotation with the shaft of the mechanism and meshing with an intermediate gear carried by a mobile member which can be displaced concentrically with respect to the axis of said input gear, and which intermediate gear meshes with an output gear in turn with the lug disc coupled for rotation and carried by a supporting lever associated with yieldable means operative to maintain said output gear in mesh with the intermediate gear, so that by selectively angularly displacing the mobile member about the input shaft, it is possible either to achieve a simple angular shift of the lug disc to allow for unweaving during reverse motion, or alternatively to achieve the retraction of said lug disc away from the heels of the hooks in order to level all of the heddle frames.

Abstract: A shed locating device, interposed between a dobby and the shed forming of a mechanism corresponding weaving loom, of the type comprising an auxiliary motor associated with a dog clutch mechanism for coupling the shaft of said motor to the shaft of the mechanism after disconnection of the mechanism shaft from the shaft of the loom, which dog clutch mechanism comprises a sliding collar member coupled rotationally to the shaft of the mechanism and provided with two series of dog clutch teeth adapted to cooperate selectively with one or the other of two corresponding plates respectively fixed in rotation with the shaft of the loom and with the shaft of the auxiliary motor, wherein the two series of dog clutch teeth of the sliding collar member are provided on two separate ring pieces capable of moving in the axial direction independently of one another against resilient spring return means.

Abstract: A mechanical with cables interposed between a dobby or other shedding mechanism and the heddle frames of the corresponding weaving loom, of the type comprising, for each frame, two pulling cables associated with two swinging pulling levers or sectors connected by rods to the frame in question, wherein the axis of articulation of the rods on each lever is located substantially inside the profile of said latter, while the corresponding cable is guided obliquely in the direction of the dobby or other shedding mechanism, directly for one of the cables and with the interposition of a single central guide pulley for the other.

Abstract: A dobby for the formation of the shed on weaving looms, of the type in which each of the double swinging levers coupled to the heddle frames of the loom is displaced alternately by two pivoted pulling hooks which are controlled on the one hand downwardly by transverse lowering knives adapted to bring them in contact with pulling knives, on the other hand upwardly by stirrups under the control of the pattern mechanism and associated with lifting means which enable said hooks to displace the said pulling knives, wherein the lifting means are constituted by crosspieces directly fixed to the transverse lowering knives while the stirrups are shaped to cooperate with the said crosspieces when they receive the action of rocking levers placed under the control of the pattern mechanism.

Abstract: A dobby for a weaving loom, of the type in which each dobby element associated with a heddle frame or group of heddle frames comprises an actuating lever actuated by a reciprocating movement, a double swinging lever pivoted thereon and of which the ends are provided with fastening hooks, this double swinging lever being actuated by two cross-pieces carried by oscillating supports and common to all the elements of the dobby, and two retaining hooks adapted to selectively cooperate with the fastening hooks, each of these retaining hooks comprising on the one hand a first or main portion pivoted on the frame and which bears the hooking nose, on the other hand, a second selection portion pivoted on the first, connected thereto by a spring and stop system, and receiving the action of the weave mechanism, the whole being such that this mechanism may achieve the selection of the double swinging lever in question by displacing the second portion of one of the retaining hooks before the corresponding fastening hook ha