Abstract: An apparatus for picking or firing a projectile-like shuttle contains a pair of rolls revolving at a relatively high rotational speed. The rolls of the roll pair can be simultaneously brought into contact with a related shuttle in order to accelerate the same by frictional forces. To that end the rolls are each arranged upon a pivotal arm and operatively connected with a control arrangement. The rolls possess a predetermined elasticity such that their radial springiness or resilient yielding action at least approximately linearly increases as a function of the increasing radial contact pressure upon bringing the rolls into contact with the shuttles. These measures ensure for a practically wear-free, absolutely precise and controllable mode of operation of the apparatus.

Abstract: Each of a plurality of winding drums has a thread guide which is rotatable at a constant speed relative thereto and is arranged to continuously wind a thread around one end of the drum. Each drum has means for releasing successive groups of the resulting windings for withdrawal from the other end of the drum, each such group of windings having a total length corresponding to a weft length. A means for controlling the apparatus to permit withdrawal of a plurality of wefts in succession from at least one drum comprises a device for blocking the withdrawal from said drum of a group of windings which have been released by said releasing means, and means for rendering said blocking device inoperative whenever a group of windings are to be withdrawn from said drum and operative during withdrawal of windings from a drum other than said drum.

Abstract: A blowing nozzle for a shuttleless weaving machine, in the shape of a hollow needle with a single blowing aperture or a plurality of elementary apertures in its side wall. The mouth of each aperture is recessed with respect to a surface surrounding it in order to prevent scraping material from warp threads moving past the nozzle. Such material could otherwise block the aperture.

Abstract: A gripper head for looms working with removal of the filling thread from stationary bobbins comprises a clamping gap formed by a fixed stop and a movable clamping tongue. The clamping gap serves to fixedly clamp a filling thread which passes through the clamping gap essentially perpendicular to the central plane of the warp threads. The clamping tongue is structured to be displaceable in the lengthwise direction of the gripper head for opening and closing the clamping gap. Due to this actuation of the clamping tongue, by displacement thereof in horizontal direction, the clamping tongue is insensitive to flutter movements of the gripper head caused by vertical oscillations and there is ensured for more positive clamping of the filling thread.

Abstract: In an apparatus for the fluid insertion of the weft in a loom which comprises a swingable sley extending across the loom and carrying a reed for the battening of a weft inserted into a warp shed formed by warp threads extending through the reed transversely to the sley and wherein the sley is formed with a weft channel extending across the loom and swingable into a warp shed formed by separating lower warp threads from upper warp threads, the channel being provided with a plurality of nozzles at spaced locations across the loom and oriented to carry a weft pick through the channel in the shed, the channel being formed by a plurality of yarn guides extending between the warp yarns and the channel having a generally V-shaped cross section opening towards the reed with upper flanks delimiting the upper side, rear flanks delimiting the rear and lower flanks delimiting the lower side of said channel, the improvement wherein the upper and rear flanks of the cross section of the channel are formed by first yarn guid

Abstract: A reading needle is slidingly supported in a force amplifying bar which is automatically moved up and down and the reading needle reads nonperforated and perforated points of a pattern card. In the case of a perforated point, a pivotal lock member biassed by a spring remains in a first position and pushes a draw arm of a correcting element downwardly unless this draw arm is already in a downward position. When the reading needle reads a nonperforated point, it is moved within the force amplifying bar by the pattern card during forward movement of the force amplifying bar. A sloped surface of a slot in the lock member slides over the head of the reading needle and swings the two-arm lock member to a second position in which one lock member arm reaches within the active range of an offset portion of a second draw arm and tilts the correcting element, whereby a cam surface of a draw hook is supported on an arm of the correcting element.

Abstract: A weft yarn accumulator for mixed weaving on a weaving machine. The loop (65) previously formed in the weft yarn (7) on one side of the belt of the store (I) by the leading entraining member is taken up by the oppositely moving trailing entraining member on to the top run of the belt in two loops. Upon reaching the bottom run, the trailing entraining member pays out the two loops which are then picked into the shed seriatim by the picking nozzle. During the picking of the loops -- i.e., during the discharge of the store (I) -- the other weft yarn is being stored similarly by the second store (II).

Abstract: A weft picking device for an air jet type weaving loom, is provided with a weft inserting nozzle which is formed with a high pressure air ejecting passage, and a low pressure air ejecting passage, so that a weft yarn introduced into the nozzle is inserted through the shed of warp yarns under cooperation of the high and low pressure air in order to save required energy for operating the weaving loom.

Abstract: A yarn feeder for use in shuttleless looms, comprising: a fixed shaft supported at only one end by a support; a sleeve angularly adjustably mounted on the fixed shaft, the sleeve having a longitudinally extending bore through which the fixed shaft extends, the axis of the longitudinal bore being inclined to the axis of the sleeve; a roller rotatably mounted on the sleeve concentrically thereof; a rotatable shaft disposed parallel to the fixed shaft; a spool mounted on the rotatable shaft for rotation therewith; and a bracket connecting the fixed shaft and the rotatable shaft at their free ends.

Abstract: An improved guide for filling yarn in its travel to an inserting device for a loom from a yarn measuring and supplying device having a circular rotatable yarn winder provided with a circular array of yarn-catching fingers along a peripheral edge thereof. The guide comprises two concentric axially-spaced rings, one large and one small, with the larger adjustably mounted coaxially with but spaced from the fingers and having an inner diameter slightly smaller than the outer diameter of the winder edge. The smaller ring is spaced from the larger on the side opposite the winder to reduce ballooning of the withdrawn yarn.

Abstract: The nozzle assembly is provided for an air jet loom and includes a guide tube which is displaceable in the direction of the flowing air on the outflow tube of the nozzle. The guide tube allows the gap between the nozzle and the following nozzle or the shed to be adjusted to an optimum value, for example, during a weaving operation. The guide tube allows the weft yarn to be held in the picking line while reducing the tendency of the yarn to be deflected into the surrounding environment.

Abstract: The connecting part for electrical warp stop motions on weaving machines has two rectangular housing shells (2,3) pressed against each other at their open sides by means of a threaded pin (10) screwed into the first housing shell (2). The screw-head of the threaded pin is in the shape of a knob (11) and presses against the second housing shell (3). In the longitudinal sides (4,6) of both housing shells (2,3) are supporting slots (9) at equal distances to take up the contact bars. On the interior base (12,15) of each housing shell (2,3) is a strip (13,16) of elastic material and on each strip a contact foil (14,17) for conducting electricity to all the contact bars, the narrow edges of which have perfect contact with the contact foils, even at varying height resulting from deviations in manufacture, due to the elastic material under them.

Abstract: A rotational dobby for use with weaving machines having plural heddle frames. The dobby has an eccentric disk for each heddle frame arranged side-by-side on a drive shaft with a coupling wedge movably installed therein, which coupling wedge effects a coupling and uncoupling of the eccentric disk relative to two recesses which are diametrically arranged on the shaft. A connecting rod is provided on the outer circumference of the eccentric disk and is coupled directly or through a rocking lever to an operating rod connected in turn to the heddle frame. A control mechanism is provided with pressure fingers which are movable in response to an information pattern on a pattern card.

Abstract: The nozzle assembly employs a guide tube between successive nozzles to reliably convey a yarn from one nozzle to the other. The guide tube provides for a practically constant flow of velocity in a central zone so that the yarn is not deflected from the central zone. The guide tube can be axially adjusted along the outflow tube of one nozzle assembly.

Abstract: A two part guide plate of a heddle frame is disclosed. One element of the guide plate is fixed to the heddle frame and has a groove into which a movable element is pivotably inserted. The fixed and movable elements are pivotably connected by a connection pin and mate with one another at corresponding fitting parts having sloped contacting surfaces. A projection and depression on the fixed and movable elements cooperate to hold the movable element in an upright position, however sufficient force on the movable element will permit it to be overthrown so that the clearance between the heddle frame and a drawing in machine can be increased.

Abstract: A shuttle utilized for producing a tubular fabric by a circular loom. The shuttle is provided with an improved structure for easily mounting on or dismounting from said circular loom. This shuttle is further provided with a plurality of guide wheels which ensure stable supporting said shuttle while driving along a guide means of said circular loom by a shuttle propelling mechanism.

Abstract: The crossing thread supply system has four bobbin pairs which are disposed on rotatable disk-shaped elements. Each bobbin pair is guided downwardly through a tube which rotates with a respective rotatable element in non-rotatable relative relation. The tube extends obliquely so that all of the tubes deliver the respective thread pairs to twisting disks located in a relatively narrow lane.

Abstract: A guide device A is disclosed for attachment to a heddle frame to space and align adjacent heddle frames on a weaving loom during shedding which includes a pair of guide legs 26 and 28 which pivot from a guide position to a folded position for accommodating placement of the heddle frame on an automatic warp threading machine.

Abstract: A monitoring system for a fluid weft insertion loom monitors the significant operative events of each weaving cycle of the loom, e.g. yarn supply withdrawal, insertion nozzle actuation and yarn end arrival, and indicates the occurrence of each such event, preferably in terms of the elapsed time of such occurrence from a fixed reference point of the loom cycle, for example front dead center. The indications of the relative timing of the occurrences of such events is preferably retained on corresponding visual displays until the successful completion of each weaving cycle or in the event of a defective cycle until the defect is corrected and the loom is restarted. Preferred individual sensing units for the respective significant operative events are also disclosed.

Abstract: Disclosed is a method of sensing an abnormality in a weft detecting device which is employed in a loom in order to detect whether a weft is present in a predetermined interval corresponding to a set crank angle range within one revolution of the crank. When the weft detecting device generates a signal in the predetermined crank angle range excluding the weft detection angle range, the signal is regarded as an abnormal signal. The abnormal signal is processed by circuitry to detect the abnormality in the weft detecting device. Thus, when it is impossible to detect a weft insertion error because of some abnormality in the weft detecting device, the presence of the abnormal signal is utilized to issue an alarm or to stop the operation of the loom.