Abstract: A device for driving at least one needle bar on embroidery or sewing machines from a main drive shaft by means of a crank drive. In order to create a simple construction of high efficiency, low noise and little wear, the axis of rotating of the crank mechanism is arranged parallel to the main drive shaft. The bearing for defining the axis of rotation of the crank mechanism is adjustable in height such that the magnitude of the stroke of the needle is unchanged.

Abstract: A device for adjusting the thread tension of multi-needle automatic embroidery machines in which each needle or thread lever has associated with it a thread brake having two brake disks between which there extends a thread which is guided over the thread lever to the needle. One of the brake disks which are pressed against each other by a spring is displaceable relative to the other brake disk in order to change the thread tension. To set the thread tension for all the needles embroidering and at the same time for those needles which are disconnected to zero or a maximum value, the displaceable brake disk (11) of each thread brake is mounted on a bolt (13) which is displaceable relative to both brake disks (10, 11). The bolt is provided with an abutment (13c) for carrying along the displaceable brake disk (11). Each bolt (13) of each of the thread brakes is displaceable by one of several cams (15) which are arranged jointly on a camshaft (16).

Abstract: A device for temporarily interrupting the movement of the embroidery needle on an automatically controlled embroidery or sewing machine has at least one needle driven by a connecting rod and a crank from a drive shaft. On this needle bar there is fastened a driver which can be coupled via a shift pawl developed as double-armed lever with a drive carriage which is pivotally connected to the connecting rod. While one arm of said lever cooperates with a catch developed on the drive carriage, another arm of the lever cooperates with a controllable holding pawl by which the needle bar can be held fast in an upper dead-center position with simultaneous disconnection from the drive carriage.

Abstract: A knife construction for a double-lift open-shed Jacquard loom includes two knife boxes which are movable in opposite directions past each other. The knives of each knife box consist of a carrier member having hook plates fastened thereto and provided with spaced control hooks. Lifter members formed as flat bars controlled by main needles arranged transverse to the knives each include two main noses engageable with the control hooks of the movable knives and a holding-up nose engageable with a stationary upper-shed knife. The formation of the control hooks and the main noses in the control direction of the main needles permits movement of the lifters intermediate the control hooks of a knife.

Abstract: A device for driving at least one of a plurality of thread levers on multi-needle embroidery machines in which the thread levers of the needles which are disconnected at the time can be uncoupled from a oscillating drive shaft by displaceable coupling elements. In order to obtain an enclosed accident-proof development of the coupling elements at the same time with high reliability in operation and only slight wear, the thread levers are arranged on coupling sleeves, which sleeves surround the drive shaft, are mounted in common in a housing and are displaceable with the housing in the longitudinal direction of the drive shaft. Furthermore, at least one coupling sleeve can be coupled to the drive shaft by means of a coupling piece fastened to the drive shaft, while the other coupling sleeves (4) are held fast in non-turnable manner together with the housing by holding bars which extend into a groove of the sleeves, the bars being fixed in position and extending parallel to the drive shaft.

Abstract: A method for controlling the speed of rotation of the drive motor for the movement of the needle bar(s) on embroidery, stitching or sewing machines, in which the relative movement between the material being worked and the needle bars is produced by motors which are separate from the needle bar drive. In order to obtain the highest possible output without excessive accelerations and abrupt changes in acceleration in the needle bar drive, the lengths of the next several stitches are read from the data carrier stored sequentially and cyclically measured, and the speed of rotation of the needle-bar drive motor is adapted in each case to the highest value measured. The number of sequentially stored stitches is in this connection selected as low as possible, corresponding to the inertia of the drive of the needle bars.

Abstract: A transmission for the shedding mechanism (dobby) of a loom in order to produce a non-uniform drive from a uniform drive, having a drive shaft and a driven shaft aligned therewith, said shafts being mounted in a transmission housing. In order to simplify the construction, a rotor is arranged fixed for rotation on the drive shaft, the rotor bearing at least one gear segment which is swingably supported on an eccentric shaft and has two cam rollers arranged in different planes, the gear segment being in engagement with a driven pinion arranged fixed for rotation on the driven shaft and the cam rollers cooperating in force-actuated and/or form-locked manner with two cams fastened in different planes to the transmission housing, the asymmetry of which cams producing a relative movement per revolution between the drive shaft and the driven shaft. The relative movement per revolution can be adjusted by replacing the two cams.

Abstract: The present invention relates to a device for displacing the color-change carriage on multiple-head embroidery machines having a plurality of embroidery needles per head which can be coupled alternatively with the needle bar drive for change in color or thread, the needle bar carriers of all embroidery heads being laterally displaceable jointly by a displacement bar which is connected with the color-change carriage. In order to create a dependably operating as well as easily mounted displacement device with the use of only a few individual parts, a control bar (10) which is provided in rack-like manner with incisions (10a) is arranged on the color-change carriage (6), a crank pin (11) driven by a servomotor engaging in said incisions (10a) and upon its engagement in an incision (10a) swinging a locking lever (12) on which there is arranged a locking member (14) which cooperates with the incisions (10a) and, via the control bar (10) positions the color-change carriage (6) in its corresponding position.

Abstract: The present invention relates to an automatic embroidery machine having a plurality of single-needle embroidery heads which are driven by a common main drive shaft. In order to also be able to produce drill patterns with such an automatic embroidery machine, a drill rod provided with a drill is arranged in each embroidery head, the rod being supported for movement parallel to the embroidery needle and being adapted to be driven from the main drive shaft by a transmission which makes it possible to stop the drill rod in the disengaged position. This transmission comprises a ring eccentric arranged on the main drive shaft and two carriages which are supported for displacement in a linear guide and can be coupled with each other, the drive carriage being connected via a connecting rod with the ring eccentric and the driven carriage being connected by a push rod with a central drive lever which actuates a continuous drive shaft for all drill rods.

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 punch for a pattern card for textile machines, for instance shedding machines or automatic knitting machines, having a step-by-step transport device and a centering device for pin wheels arranged on a shaft, for the transport of the pattern card. In order to increase the punching output and reduce the noise level, the step-by-step transport device comprises a stepping motor, and a coupling is arranged between the stepping motor and the shaft, and a centering wheel, which cooperates with a lever which simultaneously actuates the coupling, is fastened on the shaft.

Abstract: This invention relates to a rotation dobby having a key coupling between a drive shaft and an eccentric device for the movement of the heddles, the key being mounted under spring action in a radially extending recess in an eccentric disk arranged in a crank arm and being engageable and disengageable in accordance with a pattern into and out of an axially extending groove of the drive shaft at two diametrically opposite coupling places by means of a shift rod which can be controlled in accordance with a pattern and engages via a coupling member into a groove of the key which is open in the axial direction of the drive shaft.

Abstract: A dobby mechanism with a coupling, controlled according to a design, between a stationary drive shaft and a first gear with the number of teeth n, which first gear meshes with a second gear with the number of teeth 2n on a stationary axle, on which second gear an eccentric device for the dobby movement is arranged, whereby the drive shaft and the first gear are coupleable with each other by means of a radially movably mounted wedge, which wedge is controlled with a switching member from the outside according to a design, and in the coupled condition partially engages in a radially extending recess of the first gear and partially in an axially extending groove of the drive shaft. In the uncoupled condition the wedge is completely uncoupled from the drive shaft and the switching member comprises a switching rod, the latter being controlled according to the design, the switching rod in the coupling range engaging with a coupling member in a groove of the wedge.

Abstract: A control for a wedge coupling in a dobby mechanism with a reduction gear or step-down gearing between a drive shaft and an eccentric device for the dobby movement, a coupling place, and a switching member (which member is controlled according to a pattern or design) for the movement of the wedge, the switching member being under spring tension. Two control levers for the upper and lower shed movement are provided, which control levers are under spring tension and which engage or act on the switching member and are controlled by a known needle mechanism, one of the control levers additionally cooperating with a control axle, which axle is synchronously moveable with the shaft machine. A pulse element is synchronously controlled by the eccentric device (connecting rod), by which pulse element the control end of the not to be moved control lever is blocked in its starting position.

Abstract: Control for a dobby mechanism with a wedge coupling between a drive shaft and an eccentric for the dobby motion, whereby the wedge is couplable and uncouplable with a coupling member in two coupling positions which are diametrically opposite to each other. Each coupling member is connected with one radially moveably mounted switching rod, that the two switching rods being in connection with each other via two control levers (which control levers under spring action are pulled into their starting position) and a coupling rod. One of the two control levers via a balance lever cooperates both with a known needle mechanism and with a control axle, the latter being moved back and forth synchronously in the rhythm of the pressure guides for the needle mechanism, whereas the other control lever is mounted on a fixed pivot axle.

Abstract: A rotation shaft machine with a wedge coupling between a drive shaft and an eccentric device for the shaft movement, with which the wedge is mounted in a radially extending recess of an eccentric disc and in two coupling positions which lie diametrically opposite to one another according to a pattern is couplable in and decouplable from an axially extending groove of the drive shaft. The wedge has a groove which is open in the axial direction and at each coupling position there is arranged a switching rod, which is controllable according to the pattern, with a coupling member, the coupling member crossing into the groove of the wedge.

Abstract: An embroidery machine having a plurality of needle bars mounted parallel to each other for the working of different types and colors of threads, with automatic change of the needle bars driven at the time by a drive shaft. A plurality of needle bars are movably mounted adjacent each other in a common needle bar block which is displaceable transversely to the embroidery movement. A driver is fastened on each needle bar. A drive carriage is movably guided on a guide bar arranged parallel to the needle bars. A drive carriage which is driven from the drive shaft by means of a connecting rod and a crank can be coupled by means of a switch pawl with a contact piece which is also movably guided on the guide bar. The driver of each needle bar is provided with a roller which can be selectively inserted into a fork-shaped recess in the contact piece.

Abstract: A double-lift open-shed Jacquard machine with two lifting bars which are movable in opposite directions to each other and pass each other, and with flat-bar lifters which can be controlled by main needles whose maximum moment of resistance lies parallel to the direction of movement of the main needles and which have two main projections associated with the movable knives, a holder-up projection associated with a fixed upper-shed knife, and at the lower end an engagement point for a harness cord. The two main projections, the holder-up projection, and the engagement point, for the harness cord lie on a straight line as seen crosswise to the direction of movement of the main needles, and the holder-up projection stands off from the flat bar lifter transversely to the direction of movement of the main needles.

Abstract: An apparatus for the drive of the thread take-up on multi-head embroidery machines with at least one embroidery needle in each head, with which the thread take-up comprises a thread take-up lever, which thread take-up lever is mounted on the embroidery head pivotable back and forth about a horizontal axis and is driven by the machine main shaft. The thread take-up levers of all embroidery heads are secured on a common thread take-up shaft, the latter extending over the entire length of the machine. The thread take-up shaft is driven by a crankdrive mechanism from the main shaft of the machine.

Abstract: A device for control of the frame movements of embroidery or sewing automatic machines, by which the movements of the frame in the x and y direction are carried out by servomotors. The path information for displacement of the frame in the x and y direction are emitted by a microprocessor control, the latter comprising a central processing unit and a working random access memory, from which memory the path information is recalled on time in dependency on the program of a programmable read only memory and via the central processing unit with the intermediate connection of an input-output port being retransmitted to digital analog converters. The converters are connected with direct current motors of the frame via power units, the latter operating as amplifiers.