Abstract: Disclosed herein is a method of performing visible-light wireless communication using light-emitting diode (LED) illumination, in which Variable Pulse Position Modulation (VPPM) is used for low-speed data transmission and dimming of illumination, and orthogonal frequency division multiplexing (OFDM) modulation is used in a VPPM on period for high-speed data transmission.

Abstract: For producing woven fabrics with additional pattern effects, one or more effect threads are supplied substantially in the warp direction and are moved over neighboring warp threads in the weft direction, above a weft thread that is to be inserted, in various motion cycles of a weaving machine. Subsequently the effect threads are positioned below a subsequent weft thread, by submerging the effect threads into upwardly open reed gaps of a reed. To facilitate this, the reed includes first reed blades which, at their upper end, each include a sloping thread guide element projecting in the longitudinal direction of the reed, so as to at least partially extend over the upwardly facing opening of a neighboring reed gap. The reed further includes second reed blades having no such sloping thread guide elements. The guide elements guide the effect threads down into the proper reed gaps.

Abstract: In a method and an apparatus for the optical transmission of data by a pulse-width modulated light source (LED), in which a set dimming factor (N) is replaced with a cycle-dependent dimming factor (NI), the cycle-dependent dimming factor is modulated for encoding the data to be transmitted and corresponds to the set dimming factor over a time interval which is resolvable for the human eye.

Abstract: The support is provided for a reed of a seam weaving machine used for joining two opposite ends of a synthetic fabric by means of a woven seam. The reed is provided with pivotally mounted reed dents (22). The support includes a tilt strip (24) and a pressure strip (30), as well as devices (26, 32) for positioning the tilt strip (24) and the pressure strip (30) at angles relative to the bearing mechanism. A roll is also provided which can be moved along a track across the width of the reed. A U-shaped bar (40) can also be placed on the front side of the reed dents (22).

Abstract: The invention relates, on the one hand, to a process for weaving fabrics on a weaving machine, wherein these fabrics comprise a plurality of warp yarn systems, wherein for at least two mutually adjacent warp yarn systems, in each of these at least two mutually adjacent warp yarn systems, at least two pile warp yarns with different characteristics are present, and wherein in each of the said warp yarn systems the pile warp yarns are interlaced alternately in the fabric, according to a pattern, for figuring application and are inwoven or float along the fabric for non-figuring application, wherein a bottommost and a topmost fabric (20), (10) are woven according to a double-face weaving method, and the said two mutually adjacent warp yarn systems each comprise the same at least two pile warp yarns (17), (18), (21), (22), (23), (24), (25), (26), in which case, if the one pile warp yarn in the first warp yarn system (17), (21), (23), (25) in non-figuring application, floats or is inwoven in the top fabric (10), re

Abstract: A weaving reed (3) having a plurality of reed dents (14) fixed in certain positions and which may be located in a reed baulk (6). The reeds may be plain reeds or reeds, with any profile, usable virtually on any loom. The dents are formed of wires and spaces (10) and are variably spaced. The variable spaces are formed by varying the thickness of the wires, the width of the spaces, or a combination thereof to produce fabrics with a desired warp density across the entire width of a given fabric. The reed may produce a consistent warp end density which improves the mechanical properties of a given fabric and also provides virtually consistent air permeability across the width of the finished fabrics. The reed can also produce changes in warp end density in a given fabric for certain desired effects. A rotary type reed (14) and weaving rotor (19) for multiple-shed looms are also disclosed.

Abstract: A weaving reed spacing arrangement having a plurality of reed dents fixed in certain positions and which may be located in a reed baulk. The reeds may be plain reeds or reeds, with any profile, usable virtually on any loom. The dents are formed of wires and spaces and are variably spaced. The variable spaces are formed a number of techniques to produce fabrics with a desired warp density across the entire width of a given fabric. The reed may produce a consistent warp end density which improves the mechanical properties of a given fabric and also provides virtually consistent air permeability across the width of the finished fabrics. The reed can also produce changes in warp end density in a given fabric for certain desired effects. A rotary type reed and weaving rotor for multiple-shed looms are also disclosed.

Abstract: A counterweight is attached to the rocker shaft of a short sword loom diametrically opposite the lay, reed, and weft directing components to shift the center of gravity of the oscillatory elements to a position subtantially coincident with the center of gravity with a minimum of structural changes to the conventional loom configuration.

Abstract: This system is intended for relieving the drives of weaving machine components alternatingly rocking between two end positions, for instance a first rocking member forming a gripper rod drive and a second rocking member forming a reed drive. A common energy storing device, for instance a spring, is connected with the two separate drive units, so that each end of the spring is connected to one of the two separate rocking members. The rocking motions of the two rocking drive members do not overlap in time.

Abstract: A lamellae comb comprises a carrier or support and lamellae or small plates arranged thereupon which contain lateral projections serving as shed-retaining elements for the warp threads. Each shed-retaining element is formed by a respective projection at the two lamellae enclosing the shed-retaining element. The projections protrude towards each other, conjointly bridge the intermediate space between the lamellae and are mutually offset in the warp direction. Thus, the tube width may be adjusted within wide limits without the lamellae containing the projections having to be exchanged. The lamellae are positioned on the carrier or support by means of racks resiliently supported at the carrier and extending over the weaving or fabric width. The teeth of the racks position the lamellae and have a tooth division or pitch corresponding to the desired tube width of the lamellae.

Abstract: A weaving rotor carries lamellae combs, the lamellae of which are provided with shed-retaining elements. Shedding rods which are stroke-wise displaceable in the warp direction are positioned forwardly of the weaving rotor to allocate each warp thread to a shed-retaining element determining either an upper shed or a lower shed. The shedding rods are formed by first racks, the tooth spaces or gaps of which serve as guide means for the warp threads. Thus, there is ensured as precisely as possible pitch or division of the guide means for the warp threads as well as an accurate reproducibility for the shedding rods. The lamellae are positioned on the weaving rotor by second racks having the desired pitch. The first and second racks correspond to each other and are identically designed. Consequently, there results the highest conformity between the lamellae pitch and the pitch of the warp threads, and thus, an optimally ordered run or course of the warp threads from the shedding rods to the weaving rotor.

Abstract: The invention relates to a weaving loom having a rotary shed forming drum, means for guiding warps around the drum to a fabric take-up mechanism, means for inserting wefts into successive sheds as the drum rotates from a warp take-on position to a fabric take-up position, weft control elements on the drum extending outwards of the drum between warps to locate inserted wefts, and a beat up mechanism including a beat up bar mounting rotatable in synchronism with the shed forming drum, a plurality of beat up bars pivotably mounted on the mounting and having beat up elements extending outwards of the beat up bars, and cam means for controlling the beat up elements to cause them to locate the wefts as the warps pass to the fabric take-up position radially outwards of the shed forming drum and to beat up the wefts and for permitting pivotting of the beat up elements contrary to the direction of rotary movement of the beat up bar mounting so as to move the beat up elements clear of the fabric after beating up.

Abstract: The present invention provides a method and apparatus for an improved beat-up system for beating up the weft threads into the fell of the fabric. The improved beat-up mechanism includes a plurality of spacer elements which are moved into and out of position between the warp threads for maintaining the spacing between the warp threads. The beat-up mechanism further includes a plurality of beat-up elements which are inserted into and out of position between the warp threads for beating up the weft threads onto the fell of the fabric. The beat-up elements also operate to maintain the spacing between the warp threads when the spacer elements are withdrawn from between the warp threads. In addition, the present invention discloses apparatus for increasing the spacing between adjacent groups of warp threads in the same plane so that weft-advancing arms or shed-retaining elements may be more easily inserted into the plane of the warp threads.

Abstract: A travelling-wave loom relates to the machine-building branch of the textile industry. This loom comprises a cloth-forming mechanism composed of a rotary reed and a separating grate with plates, and weft thread carriers propelled through the shed of the warp threads and partially accommodated in a tunnel of the separating grate. Each carrier has a groove on the side facing the plates of the separating grate, whereas each plate of this grate has a projection engaging the groove of the carrier. The ends of the projections of the plates are positioned as close as possible to the mechanical trajectory of the crests of the teeth of the reed disks so that with the disks rotating, the teeth thereof are clear of the tops of these projections.

Abstract: In making triaxial fabric, the warp strands cross each other so that different positions for the beaters are required for successive insertions of weft strands. One of two beaters holds the fell until the other is ready to come down. In order to stabilize the position of the beater bar in the beat-up position, two toggle links in the beat-up linkage are maintained in aligned compression, so that the effective number of links is reduced by one.

Abstract: A device for supporting a rotary reed on a shaft shed weaving machine in which a rotary reed having a radially projecting profile is supported in portions of its periphery by rotary roll bodies to provide relief of the loading on the summit area of the rotary reed profile.

Abstract: Method of and apparatus for continuous progressive beating up of weft in travelling-wave shedding looms with simultaneous picking of weft threads into the warp in which the weft in the shed is affected by a beating up force progressing in the weaving direction. The weft is first affected by a beating up force which is the resultant of a force acting in the direction of the weaving plane and another force acting in the direction towards the weaving plane, and then is affected by a beating up force acting in the direction of the weaving plane, while the beating up force continuously progresses in accordance with the travelling shed weaves along the whole warp width.

Abstract: The present invention relates to a wave-type weaving machine with reed teeth which are arranged along an axis and are adapted to pivot about the said axis, abut with some play on cam-like guide surfaces and, on rotation of the guide surfaces, carry out pivoting movements about the said axis, the reed teeth beating-up the weft thread in one of the end positions of the said teeth.