Abstract: A method and apparatus to monitor filling insertion in a weaving machine. A filling (3, 4) is severed during insertion by a filling-scissors (15), and the actual time at which the filling (3, 4) is severed is detected.

Abstract: A drive for a mechanical loom. The drive includes a main drive shaft (2) that is mounted in a machine frame (1) and is driven by a drive motor (5) which is disposed coaxially to the main drive shaft (2) and directly connected thereto. The main drive shaft (2) is preferably designed as a motor shaft for the drive motor (5).

Abstract: An apparatus for tensioning warp threads in a weaving machine having a rotatably mounted carrier beam (5) which exerts strain on a tensioning roll (10) acting on the warp threads (15). A pre-stressed torsion spring (16) is arranged inside the carrier beam (5) and via its torque, presses the tensioning roll (10) against the warp threads (15). The apparatus can sense the torsional moments of the torsion spring (16).

Abstract: A gripper weaving machine with at least one gripper (1, 2) joined by a guide portion (21) to a rapier (3, 4) and fitted with guide units (19) arranged in a row and insertable into a formed shed (22). The guide portion (21) on its side facing away from the gripper (1) includes at least one slide rib (26) extending along the longitudinal direction of the guide portion and protects the warps (24) from making contact with the guide portion (21).

Abstract: A rotatable element (10) is configured with a helical, endless thread guide passage (14) which is used to twist at least two threads (8, 9), particularly in a weaving machine's selvage forming device (7). The threads (8, 9) are guided in the passage (14) and displaced axially and mutually crossed by rotating the rotatable element.

Abstract: A tubular housing is used for a gripper-loom's feed gripper. The feed gripper includes a metallic tubular housing formed of a single bent metal plate. The single bent metal plate includes at least two mutually overlapping segments that are rigidly joined to each other.

Abstract: A filling insertion system for a weaving machine includes a holder (8) for at least two nozzles (10, 11, 50). Each of the nozzles (10, 11, 50) includes a feed connection (20, 21, 52) for a pressurized fluid. The feed connections (20, 21, 52) are all arranged on the same side (15) of the holder (8) and are space apart from each other along the direction of the longitudinal axes (30, 31, 54) of the nozzles (10, 11, 50).

Abstract: A selvage insertion apparatus (13) for a weaving machine with at least one insertion arm (18) and at least one filling thread clamp (17) which can be applied through a drive device to control a filling thread and which operate from a common drive shaft (40). An individual drive motor (61) is operated by a programmable control system (14) and powers the drive shaft (40).

Abstract: A gripper-loom drawing gripper for receiving a yarn supplied by a yarn feeder and resting on a deflection guide, the gripper serving to position the yarn and carry it into the shed. The drawing gripper is configured to define a longitudinal cavity extending from its forward end facing a filling to be received and positioned by the gripper to its opposed rearward end. The cavity of the gripper faces towards and partially encloses the deflection guide. The forward tip of the gripper includes an inclined surface for guiding a filling to a positioning device on the gripper, and a yarn clamp is also carried by the gripper. The gripper includes additional receiving and positioning devices for a filling to be inserted in the loom shed.

Abstract: Method and apparatus for optically monitoring filling yarns inserted into a guide duct (10). Substantially collimated light rays are generated and directed transversely to the guide duct (10) onto photo-detectors (23), with the detection of interruption of the light rays by the fillings determining those positions which are assumed by the fillings when being inserted into the guide duct (10).

Abstract: In a rapier for a gripper loom, the rapier is made of synthetic material and includes at least one layer of reinforcing fibers. The gripper is mounted at the front end of the rapier, and the layer of reinforcing fibers begins at a distance away from said front end.

Abstract: A movable brake shoe (32) is mounted in a yarn brake (23). The yarn brake (33) includes two brake shoes (31, 32) arranged to brake a yarn (3) running between them. Actuating devices (33, 34) allow mutual compression of the brake shoes (31, 32). The movable brake shoe (32) is lamellar and tiltable about a tilt axis (49) which is located at a distance from and substantially parallel to the path of the yarn (3) to be braked.

Abstract: A gripper weaving machine having at least one rapier (1) which carries a gripper (3) and is driven by a drive wheel (9) and which is guided outside a shed by guide elements (13, 15), where the guide elements are part of guidance devices and are arranged to rotate the rapier (1) about its longitudinal axis (28).

Abstract: In a method of scanning, with the aid of a sensor device, a yarn of a predetermined length which is intermittently withdrawn from a winding reservoir provided on the storage drum of a yarn feeding device for weaving machines, the yarn pulse acceptance for exclusively at least one first yarn pulse is changed at an increasing yarn speed and/or upon generation of at least one first or each winding signal to a yarn pulse acceptance for further faster yarn pulses and non-acceptance of interference pulses that are slower than the second yarn pulses. A yarn withdrawal sensor which is suited for said method is characterized in that a filtering device is provided with two different selective filtering modes that differ from each other by their acceptance of yarn pulses generated at different yarn withdrawal speeds, and that the filtering device is switchable at an increasing yarn withdrawal speed from a first filtering mode to at least one further filtering mode.

Abstract: Apparatus for supplying compressed air to a main blowing nozzle of an airjet loom for filling insertions includes an integrated air feed unit including an intake directly connected to the compressed air supply, an outlet connected to the main blowing nozzle and air flow control valves including valve drivers. Main and bypass ducts provide communication between the intake and the outlet with the airflow control valves controlling the supply of air to the outlet of the air feed unit. The air flow control valves include a check valve arranged to control in an on/off manner the supply of compressed air from the main duct to the outlet; a first adjustable throttling valve arranged to control the pressure of compressed air supplied to the outlet during filling insertions when the check valve is open and a second adjustable throttling valve arranged to control the pressure of compressed air supplied to the outlet between filling insertions when the check valve is closed.

Abstract: A device for stretching an inserted filling (14), in particular for use in an airjet loom, includes a channel (5) adjoining a filling insertion conduit (4) of a reed (3), a blow nozzle directed at a branch channel intersecting the channel (5) in substantially perpendicular manner discharging into the channel (5), and at least one deflection location for the filling (14). The deflection location consists of a wear-resistant element (7, 10, 11) that extends substantially transversely to the direction of insertion (A) of the filling.

Abstract: A selvage-forming device (1) for a loom includes yarn guide structures (2, 3, 5) to guide at least two selvage yarns (8, 11) that are alternating raised and lowered to form a selvage shed (12). These yarn guide structures are powered through the intermediary of eccentrics driven by their own independently controlled drive (13) and an eccentric drive coupling-bracket (16) that creates a motion by which one selvage yarn (8) is additionally shifted transversely to form mutually crossing interlacings.

Abstract: A power loom harness fitted with an upper and a lower cross-sectional contoured rail is arranged to support heddles by extending through eyes at the ends of the heddles. An inset is combined with a first of the rails in order to reduce play, in the direction of motion of the harness, between drive surfaces of the first rail and corresponding mating surfaces of the heddle eyes, so that play between the first rail and corresponding heddle eyes is less than play between the second of the two rails and corresponding heddle eyes, so that the first rail drives the heddle in two directions and the second rails serves a guiding function.

Abstract: A throttling valve (11) in particular for an airjet loom includes an electric drive (27) for two valve components (17, 19) subtending a throttling gap (25), the drive including motor displaceable in predetermined positions by means of a control and/or regulation unit for setting throtting gaps (25) of predetermined sizes.

Abstract: An optoelectronic sensor device (S) for detecting a yarn passing through a scanning zone (3) comprises at least one light source (L, L'), at least one photoelectric receiver (R1, R2) which is responsive to light variations and which is connected to an evaluation circuit (C), and a slit aperture (A1, A1) arranged between the yarn and the receiver. In a weft-yarn measuring and storing device (F), the sensor device (S) forms a withdrawal sensor for the yarn which is withdrawn overhead from the storage body (B). According to the invention at least two receivers that are closely adjacent to each other are oriented towards the scanning zone, with the receiving surfaces (4, 5) of the receivers being each covered by an upstream slit aperture (A1, A2), except for a limited area. The slit apertures (A1, A2) are arranged relative to one another at an acute angle of not more than 90.degree..