Abstract: The invention relates to a rotary dobby having a wedge coupling between a drive shaft and an eccentric device for the harness motion, in which the wedge is displaceably supported in a radially extending recess in an eccentric disk arranged in a crank arm and can be coupled and uncoupled in accordance with a pattern in an axially extending groove of the drive shaft at two diametrically opposite coupling locations by a shift rod which is controllable in accordance with a pattern and engages by a coupling member into a groove of the wedge which is open in axial direction of the drive shaft. In order to assure a dependable coupling and uncoupling at high speeds of revolution, the wedge is locked against displacement in its coupled position by a spring-biased locking pawl on the eccentric disk and the locking pawl is displaceable by the coupling member of the shift rod into a position which permits the uncoupling of the wedge.

Abstract: A loop for providing a ladderless woven fabric made from warp and weft threads and with a stitch-like appearance.In the loom the warp threads (3) pass into holes of thread guides which are mounted side by side on a shaft (7), rotatably drivable through approximately 180.degree. about its axis between first and second positions; the warp threads (3) initially define triangles at the center of which are provided openings (14) for the insertion therethrough of weft threads. During the forward rotating movement, the threads (3) close around the weft thread, and the latter leaves the thread guides by way of slots (15), after which, as the thread guides execute a return stroke, the triangles reform around the openings (14).

Abstract: In a circular loom provided with a motor for driving the loom, and annular guide means for guiding at least one shuttle along the annular guide, when a weft is broken or a yarn package formed on a bobbin held by a shuttle is exhausted, the driving of the circular loom is automatically stopped by a mechanism comprising a first detector for detecting a weft breakage, and/or a second detector for detecting an exhaustion of a yarn package, means for stopping an electric power from a power source to said motor, means for transmitting a signal from said first detector and/or said second detector to said stopping means.The above-mentioned first detector and second detector are mounted on each shuttle.

Abstract: A weaving detector for detecting weaving defects generated on the surface of a ground fabric of a carpet or rug moving in a first direction is disclosed. The weaving detector moves in the direction of the width of the cloth and includes one or more detecting sensors spaced in the direction of the movement of the cloth. A guide sled is connected to the sensors and has upwardly curved ends so as to prevent the catching of a defect by the sled. The sensors only provide a defect signal when both sensors simultaneously detect a defect. The sensors are supported by upper and lower supports having vibration absorbing springs therebetween so that the electrical controls are not damaged by the vibrations.

Abstract: The electronic weft stop motion is designed for monitoring the weft thread in a last phase immediately following the weft insertion into the weaving shed when a thread tensioning device located on the picking side of the machine laterally deflects the weft or filling thread and thus holds it tensioned. A tactile thread sensor is arranged in the region of the lateral deflection of the weft thread in such a manner that the thread sensor goes free from the weft thread in the undeflected condition thereof, however is frictionally contacted by the weft thread when the latter is being laterally deflected.

Abstract: In the loom, a thread guide channel is formed by upper plates and lower plates located in different cross-sectional planes of the channel. The lower plates are fixed to a sley, while the upper plates have their own guidance system formed in such a way that in each movement phase, points of the upper plates located furthest from the sley pivot point describe predetermined path lines which intersect the path lines of points on the lower plates furthest from the sley pivot point, so that during weft fastening the path line of upper the plates are at a smaller distance from the sley pivot point than in the weft insertion position of the sley. The upper plates are mounted on a pivot point on the sley and are pivotally connected by means of a connecting rod to another pivot point mounted extraneously of the sley.Despite the smaller sley travel, an adequate spacing of the plates of the thread guide channel from the weft fastening during insertion into the shed is achieved.

Abstract: At an insertion element of a gripper loom possessing a gripper and a flexible insertion band or tape which drives such gripper, there is arranged a reinforcement element at the region of the insertion band which merges with the gripper, this reinforcement element being connected by screws or the like with the insertion band. The gripper is connected on the one hand with the reinforcement element and, on the other hand, with the insertion band likewise by screws. The gripper consists of a material having a lower specific weight or density in relation to steel and is provided at the region of its clamp member which fixedly clamps the filling thread with an insert or insert member formed of a wear-resistant material. Due to this design there are realized high stability of the insertion element, low fabrication and assembly cost, and a possibility of increasing the rotational speed of the loom owing to reduced mass of the gripper.

Abstract: A hinge construction comprising two members, a plate on each member, an offside out-of-the-way hinge, and a substantially recess and aperture free pivoted channel safety cover to protect the area of abutment of the two members when in such position.

Abstract: An improved papermaker's fabric comprising warp and filling yarns woven in a preselected conventional unbalanced weave pattern modified such that every other warp yarn occupies a position with respect to the filling yarns opposite to that which it would normally occupy according to the above mentioned preselected conventional unbalanced weave pattern.

Abstract: In a circular loom in which at least one shuttle is continuously travelled in one direction along an annular shuttle guide means, and a plurality of shed forming mechanisms arranged annularly and coaxially with the guide means are sequentially opened prior to arrival of the shuttle to form a moving shed through which the shuttle is to be inserted and passed, each of the shed forming mechanisms having a cylindrical cam mechanism which creates an opening movement of the respective healds, a shuttle propelling mechanism is disposed.

Abstract: A heddle frame usable in a high speed loom is disclosed. The heddle frame includes hollow horizontal aluminum bars joined to vertical side stays. Each joint consists of a receptacle in an end of an aluminum bar, including a channel section into which an extension of a connecting piece held within a side stay may be inserted for joining the aluminum bar and side stay. A fixing bolt passes through the connecting piece and is threaded into a bore of the receptacle.

Abstract: A thread guiding eye, which may be made from case-hardened or rust-proof steel, is embedded in a heddle moulded from plastic. The embedding is effected by injection-moulding the plastic around the thread guiding eye. The thread guiding eye may have an essentially crescent-shaped profile, its edges being embedded in the plastic in order to ensure a smooth and uninterrupted transition. The longitudinal parts and/or the region of the thread guiding eye are at least approximately oval in cross-section. A heddle of this type combines the advantages of a metal heddle because of the reduced wear of the thread guiding eye and those of a non-metallic heddle because of its low weight.

Abstract: A reed for a jet loom, in which the filling yarns are introduced into the shed by a gaseous fluid expelled from nozzles arranged spaced apart over the loom width and which periodically enter the shed, which reed has first reed blades having a profiling on their one edge and together form a guide channel for the filling yarn; and in the region of the projection of the nozzles onto the reed there are provided second reed blades the shape of which at their one edge is so selected that the guide channel is open on the wall thereof adjacent the nozzles.

Abstract: An apparatus for assisting a weft picked into a shed by main nozzle of a jet loom in being inserted through the shed properly is provided. The apparatus comprises improved auxiliary nozzles, each of which has formed therein a first outlet opening for discharging weft pick assisting jets of fluid therethrough and a second outlet opening for discharging weft pick stabilizing jets of fluid therethrough, said first and second outlet openings being arranged in spaced relation to each other along the axis of said auxiliary nozzle and also in such a way that the axes of said first and second outlet openings will form an angle thus directing in different direction from each other so that harmful turbulence of fluid due to interference thereof may be prevented successfully from taking place.

Abstract: The crossing thread supply system for the weaving machine employs a rotatable bobbin carrier and a thread tensioning means for controlling a thread pay-out from a bobbin on the carrier as a function of thread tension. The tensioning means employs a control lever which is pivotable under the influence of the paid-out thread and a pivoting lever which engages via a pawl with a ratchet wheel connected to the bobbin carrier. The control lever serves to pivot the pivoting lever when moved to an innermost position. This disengages the pawl from the ratchet wheel to permit indexing of the ratchet wheel and bobbin carrier.

Abstract: On an air jet loom, one or more accelerator tubes are arranged in between a main jet nozzle and yarn guides or the like in axial alignment with the main jet nozzle preferably in an axially rotatable fashion in order to increase weft transportation energy of the air flow carrying the weft by sucking ambient air into the accelerator tube. Remarkable increase in travelling speed of the weft under unchanged air pressure or appreciable reduction in power consumption with unchanged travelling speed of the weft can be expected.

Abstract: A loom comprises: a machine frame; heald frames for supporting ground heddles of warps; and a device for forming a selvedge. The device for forming a selvedge includes: a rotatable member which is rotated by a power transmitting mechanism; and a pair of selvedge yarn guides which are attached to said rotatable member and which are utilized to withdraw the selvedge yarns. The device for forming a selvedge is disposed at the side of the machine frame and behind the heald frames. The selvedge yarns are open and closed in synchronism with the shedding motion of the warps and are formed into a selvedge by twisting the selvedge yarns at every weaving. The device for forming a selvedge is adjustable in a lengthwise and vertical direction of the machine frame.

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: In a shuttleless loom provided with a gripper which repeats the gripping and releasing of a weft in synchronism with the weft inserting operation, a fluid supply apparatus comprises a compressed fluid source, a valve mechanism having a fluid entrance and at least one fluid discharge exit, a pipe means connecting said compressed fluid source to said fluid entrance of the valve mechanism, at least one nozzle disposed at a given position in the loom, and a connecting means connecting said nozzle to said fluid discharge exit. The valve mechanism is actuated in synchronism with the gripping and releasing operation of the gripper.

Abstract: A yarn brake for a textile machine. The yarn brake comprises a stationary clamping plate and a movable clamping plate. The plates are forced together by first and second biasing means to provide full braking pressure on a yarn passing between the plates. De-activating means operate to selectively nullify the effect of the second biasing means to provide partial braking pressure on the yarn, or to nullify the effects of both biasing means so that there is no braking pressure on the yarn. The invention also includes a weft yarn braking system for a multi-weft loom utilizing a yarn brake of the present invention for each weft yarn. Control means, operating in timed relation to the loom, operate the brakes in a programmed sequence. The yarns are fully braked when not being inserted into the loom.