Abstract: Let-off motion for elongated material wound on a let-off beam. Such let-off motion comprises a tension detector connected to the input of a let-off element, the output of which is connected with the control element of the driven let-off unit, with the input shaft of the drive and output shaft of the let-off drive, which responds to changes of the control magnitude value in its control element by a change of the relation of angular velocities between the input and output shafts. The input of the let-off element is a rotary disc slidably arranged between two axially arranged clutch discs of the let-off element, the clutch discs being mutually positively rotatable in opposite directions. The clutch discs of the let-off element are drive-coupled with the input shaft of the driven let-off unit, and the disc of the let-off element is provided with a central, internally threaded hole which receives and is threadedly mated with the threads on the spindle of the let-off element.

Abstract: A picking channel for pneumatic jet looms with auxiliary blowing sections disposed across the weaving width and consisting of at least three auxiliary blowing nozzles the relative positions of the axes of which being those of skew lines with the axis of the first auxiliary blowing nozzle crossing the axis of the weft thread under insertion. The axes of the other auxiliary blowing nozzles pass said axis of the weft thread under insertion of the outside, in the direction of the axis of the first auxiliary blowing nozzle. The various dispositions of both the auxiliary blowing sections and nozzles insure reliable weft insertion, and economic exploitation of the energy of the carrier medium and, consequently, a greater weaving width.

Abstract: A loom capable of weaving a wide variety of cloths, the loom requiring at most the simple exchange of gears to permit it to weave cloths of widely varying characteristics. The loom has an input driving element for the warp beam let-off motion which is drivingly connected with the output element of an adjustable transmission mechanism of the let-off motion drive, while the input element of the adjustable transmission element of the let-off motion drive is drivingly connected with the transmission mechanism of the positive drive of the cloth take-up beam. The input element of the adjustable transmission of the let-off motion drive is drivingly connected with the output element of the transmission mechanism of the positive drive for the take-up beam, the take-up beam being also drivingly connected with such output element.

Abstract: The present invention relates to an apparatus for accurately controlling the distribution of pressure fluid through a number of branch conduits, the apparatus being advantageously employed for jet looms. The apparatus eliminates excessive wear of mutually engaged parts which would otherwise cause unwanted time delays in the operative steps of the system with which it is employed. The apparatus includes a plurality of valves, each valve having a movable valve element coupled with the outer race of an anti-friction bearing mounted on an eccentric by means of a piston and a push rod provided with a spring which maintains the piston in engagement with the outer race. The valve is opened when a stop on the piston is moved by the eccentrics into engagement with the other end of a push rod which forms a part of the movable valve element.

Abstract: There is disclosed a back rest mechanism for a loom. In a first disclosed embodiment a back rest roller is rotatably mounted on the outer ends of parallel arms or levers, mounted for oscillation about their inner ends, which are connected for joint movement by a hollow back rest shaft. Deflection of the back rest roller by the warp passing from the warp package on the warp beam to the shed of the loom is resiliently opposed by one or more torque rods extending between and connected to a central portion of the back rest shaft and a fixed part or structure, such as the frame, of the loom. Means is provided for adjusting the basic torque to which the torsion bar or bars are subjected under a predetermined set of operating parameters of the loom.

Abstract: A method and arrangement for picking a weft thread by means of a weft thread inserting comb in a jet loom. The comb is composed of a plurality of juxtaposed comb members which are mounted on a reciprocating slay of the jet loom. Each comb member has a pair of shank portions which define a weft inserting opening and an unthreading channel. The comb members, when in their operative positions, define a weft inserting channel. At least one of the comb members has secondary carrying fluid conduit means which directs via an outlet a stream of a secondary carrying fluid into a zone of said weft inserting channel which is disposed below the axis of the channel relative to the unthreading channels of the comb.

Abstract: There are disclosed a method of and an apparatus for controlling weft threads, particularly in jet weaving machines with alternating insertion of two different wefts into a shed. At least during the inserting time of the first weft the end of the second weft inserted into the shed before said first weft is held and tensioned and is cut upon finishing the inserting operation of said first weft.The apparatus for controlling wefts includes a pair of inserting jets and weft directing means with guides for each of the weft threads, weft traps being provided between the appurtenant nozzle and the weft directing means, for the purpose of trapping the appurtenant weft in the non-inserting position of the appurtenant inserting nozzle.

Abstract: A supporting mechanism particularly adapted for supporting weaving machines on a base by means of which the machine frame of the weaving machine is suspended by cables which are adjustably secured on four support levers. Four support brackets are disposed at the four corners of the machine frame and rest on the ground or a base. Each bracket is provided with a bearing and each lever is provided with a fulcrum. Two torque rods are provided, one on each side of the machine frame. Each torque rod is rigidly secured to one lever and to an oppositely disposed bracket. By virtue of the coaction of the suspension support of the machine frame by four cables, the pivot support supplied by coacting bearings and fulcrums and the action of the torque rods the weaving machine is cushioningly supported by the support mechanism.

Abstract: There is disclosed a mechanism for controlling the pressure fluid supply to the weft inserting nozzles of jet looms provided with a device for color pick changes. The mechanism of the invention is used with a jet loom having a synchronizing pulse generator, the mechanism including a system of two parallel branches each of which comprises a series combination of pulse-shaping circuit, power amplifier, a solenoid-control valve, and a weft inserting nozzle, each of the branches having an input which is connected to a respective one of the outputs of the synchronizing pulse generator.

Abstract: There is disclosed a device for cutting weft in looms with mechanisms for multi-weft weaving. The cutting device includes a holder on which mutually adjustable shields are mounted. The shields are provided with entrapping dents for the introduction and location of weft between the blades of cutting jaws at a cutting point. The cutting device has a movable jaw which is adjustably connected to a control lever. Adjustable shields and cutting jaws permit the use of the entire length of knife blades secured to the jaws. In this manner, during cutting the overlap is minimized and the lifetimes of the cutting edges and the cutting jaws are increased.

Abstract: An improved electromagnetic scanner has a substantially E-shaped core having an outer surface that is positioned, at a predetermined air-gap spacing, from a regularly grooved ferromagnetic surface of a textile machine. A pair of coils extend around the crosspiece of the core between the outer arms of the core and the middle arm thereof, such coils being connected in series and connected to a bridge circuit to generate an electrical indication that varies at the rate of movement of the grooved ferromagnetic surface past the core in a direction crossing the grooves in the surface. The plane of said core is oblique to the grooves. A pair of abrasion-resistant, non-magnetic contact elements supported in the spaces between the arms of the core, projecting outwardly into the air gap, and are urged into contact with the moving ferromagnetic surface by a spring carried in a housing in which the core and coils are mounted.

Abstract: A novel construction of a control plate inserted within and corresponding to a system of plates of a picking comb of a fluid-jet loom is described. The exit opening of the control plate has a detecting section including a light source and a photocell disposed in aligned spaced relation on opposite sides of the exit slot. The width of the exit slot is narrowed, at the location of the source and photocell, to a dimension substantially equal to the diameter of the weft thread exiting from the picking space of the control plate. At least one of the light source and photocell projects into the narrow exit slot to assure an enhanced wiping action of the weft thread on the detecting elements as the weft thread moves through the exit slot.

Abstract: A loom with shed forming means including healds, of which at least the carrier parts are displaceably mounted in guiding grooves formed in a bed extending along the whole machine width, at least one control mechanism being assigned to said carrier parts of the healds, said control mechanism being movably mounted on a guideway parallel to said bed. The control mechanism includes a selecting mechanism and a resetting mechanism. The selecting mechanism is preferably formed by a selecting magnet with a guiding means therefor.The loom of the invention may be one with progressive shed forming, or one with single shed forming.

Abstract: A constant tension regulator for controlling the tension of positively unwound flexible material, particularly warp threads in a weaving machine. Means are operatively mounted on the frame of the regulator for sensing changes in tension in the unwinding flexible material. These sensing means output a control movement in accordance with sensed tension in the unwinding flexible material which is translated to a mechanical integrating unit and a proportional adjusting unit, arranged in parallel, which jointly transmit a control variable adjustment to the driving means of the warp beam thereby adjusting its rotary speed in accordance with the sensed tension.

Abstract: A device for supporting the slay drive of a loom such device is especially advantageous in a high-speed loom with a great working width. Two transmission mechanisms are used, these being placed between the loom sides. The device has a housing assembly including a box having a center part, to both ends of which there are affixed gear boxes; to the opposite sides of the center part there are secured exchangeable terminal parts of the said box, the terminal parts being fixed to the sides of the loom. A main shaft is journalled in one of the terminal parts, in the adjacent gear box and in a portion of the center part, the main shaft being connected with a driven shaft in the center part by means of gears. The transmission mechanisms are mounted in the gear boxes, the transmission mechanisms being connected to a cross bar bearing swords upon which the slay is mounted.

Abstract: Selecting device for the individual selection of the operating means in knitting machines, particularly in large diameter circular knitting machines with rotating needle beds and an electronic selection mechanism. Said device includes at least one selecting magnet which is fixed with respect to the cam system, and selectors slidable in grooves of a needle bed, said selectors having at least an elastic central part, the lower part of the selector being located within the active range of the selecting magnet, the upper end surface of the selector being inclined towards the cylinder cam box. A slider is swingably arranged about a joint in its upper part inside a groove of the needle bed above each selector, the lower part of said slider being provided with a recess selectively receiving the upper part of the selector.

Abstract: An electronic sequencer for successively introducing a weft propelling fluid, such as air, into the successive nozzles of a fluid-jet loom is described. A plurality of separate control paths, individual to the succession of nozzles, each includes a triggerable pulse generator and an associated actuator connected in series with an electromagnetic valve that couples the propelling fluid to the successive nozzles. The pulse generator associated with the first nozzle in the sequence is triggered by a detector that is actuated once during each cycle of the loom. The remaining pulse generators are coupled to the output of an associated one of a plurality of delay circuits. The delay circuit associated with the second nozzle in the succession is triggered by the output of the detector, while the input of each remaining delay circuit is coupled to the output of the next-preceeding delay circuit.

Abstract: Fabric spreader for knitted goods on a circular knitting machine. The fabric spreader is provided with expanding wings which are pivotably and adjustably supported on a fabric spreader frame and are adjustably spring-loaded with respect to the force generated by the knitted goods being taken up.

Abstract: Knitting needle especially for circular knitting machines, having a shock-absorbing shank. The knitting needle is torsionally twisted through a certain angle in the region of its butt. The torsional twist, on the one hand, takes up the clearance in the needle trick of the needle carrier, and on the other hand, permits springing of the needle in the region of the butt, by its impact on the raising or sinker cam of a cam box system, which leads to damping the impact force. This springing of the needle also diminishes the angle of the twist, thus enabling the effecting of a line contact of a corresponding part of the butt with the cam edge. The friction between twisted needle stem or shank and its trick prevents the throwing off of the needle, thus reducing the stress to which the needles and the cam edges are exposed. The reduction of the impact force also reduces still other forces which affect the needle in the needle trick.

Abstract: The movement of each of a plurality jacks or rocking pressers of a ferromagnetic material a circular knitting machine between a knitting and a non-knitting position is accomplished by the cooperation of the fields of a permanent magnet and a selectively actuable electromagnet which are magnetically isolated from each other. The portion of the jack where such fields intersect may be recessed to accomplish jack positioning with minimum expenditure of magnetomotive force. The airgap in the pole structure of the permanent magnet and in the separate core of the electromagnet are coaxially disposed, with the electromagnet being suitably located either inside or outside the core of the electromagnet. Where outside mounting is used, the permanent magnet may be disposed on the periphery of the circular bed of the machine along with the jacks, while the electromagnet is radially spaced therefrom.