Abstract: A yarn supply apparatus, particularly for textile machines, includes a rotary pulley over a holder body and a yarn supply reel under the holder body both of which are secured to a rotary shaft so that a yarn passed through in the order of a yarn guiding eyelet and a disk is wound around a number of elongated metallic rods located between two flanges to form a plurality of loops of yarn windings. The yarn stored on the metallic rods of the yarn supply reel is continuously let off from the lower side thereof to a let off guiding member. The yarn supply apparatus further includes a driving part having a cover for a holder body and a hollow portion in the interior thereof. A first pulley is rotated around a first shaft secured to the holder body and a second pulley is driven by the rotating power of the first pulley. A disk part is located under the holder body and secured to the second pulley shaft and several idle disks sited upside of disk.

Abstract: A yarn brake has a bearing pin, two brake elements for braking a yarn, the brake elements being mounted on the bearing pin for being rotated by the yarn in friction engagement with the brake elements when the yarn is consumed, at least one of the brake elements being axially movable on the bearing pin, a bias mechanism holding the two brake elements in abutment, and a support, the bearing pin being freely rotatable in the support by the brake elements during use of the yarn brake.

Abstract: A thread tensioning and drawing-back device for pile warp threads of a weaving machine, which device comprises provisions (2) for braking, by spring elements, pile warp threads (4) taken up by a weaving machine, and provisions (5) for drawing back the pile warp threads (4) in case of variations of warp length resulting from changing the shed position of the weaving machine, in which the provisions (2) for braking the pile warp threads (4) consist of disk springs (2) placed next to each other in a row on a horizontal spindle (3), each provided for braking one pile warp thread (4). The device can furthermore comprise preferably detachable tension spindles (11), (12) at the entrance to the disk yarn brakes (2) and at the exit from the disk yarn brakes (2).

Abstract: An apparatus and method for melt spinning a plurality of downwardly advancing multifilament polymeric yarns, and winding the advancing yarns into respective packages. Each of the advancing yarns is brought into contact with a separate yarn delivery mechanism which acts to control the yarn tension before the yarn is wound into a package. Thus, the yarn tension of all of the yarns can be made substantially the same when they are wound into packages, which permits all of the packages to have the same winding structure and the same packing density.

Abstract: An anti-static tension device for maintaining tension and drag on yarn and for reducing static on the yarn, as the yarn is supplied from a yarn bobbin supply to the creel of a knitting or weaving machine. The anti-static tension device includes a mounting clip for mounting the anti-static tension device on a creel; and an anti-static disc having a hole therein for receiving a collar. The collar has a first passageway for receiving yarn from a yarn bobbin supply, and the anti-static disc is formed of a non-static plastic material to reduce static on the yarn. The anti-static tension device further includes a tension assembly connected at one end to the mounting clip for mounting to a creel and at the other end thereof to the anti-static disc.

Abstract: A device for preventing entanglement of fishing-thread on a fishing reel includes a holder, and a line-roller having a retainer attached to an end thereof. The line-roller is provided within the holder. The line-roller is rotatable relative to the holder. A line-collar is concentrically disposed relative to the line-roller and surrounds the line-roller. The line-collar is axially movable to a position in which the line-roller and the line-collar form a space therebetween. A spring is concentrically provided between the line-roller and the line-collar. The spring has one end abutting against the retainer, and another end urging the line-collar out of the position, so that the fishing-thread is retainable in the space and between the line-roller and the line-collar.

Abstract: The arrangement can control the pulling tension of a thread 1 during its wind-off or wind-up, from or to a spool 3. The arrangement includes a thread brake 5 having a local portion 6 and a portion 8 movable relative thereto, between which the thread 1 is pulled during the wind-up or wind-off and which provides a frictional force upon thread 1. Furthermore, the arrangement includes an actuator 13 for applying a frictional force applied by thread brake 1 to thread 1 may be controlled. Preferably included is a piezoelectric sensor 14 which may be deformed by the force applied by the thread to the sensor 14. In the prior art, the actuator comprises a setting nut and a spring whose operation is time-consuming.

Abstract: In connection with a device for retracting and advancing a thread processing element in relation to a threadline it is provided that the retracting and renewed advancing is caused solely by switching on a drive motor in a direction opposite its normal operational direction of rotation. For this purpose a drive member, which is maintained fixed against relative rotation in this direction of rotation, and another drive member which can be rotated in this direction of rotation in relation to the first by way of a drive motor, are provided, which change a rotating movement into an axial movement.

Abstract: The invention relates to a thread feeder device with continuously adjustable thread extraction tension for textile machines, particularly for textile machines having uneven thread consumption, with a storage body that carries the thread without slippage and is directly or indirectly actuated by a motor and whereon the thread, in order to form a storage reserve winding, is wound tangentially and (according to requirements) is unwound axially between its front face, provided as a braking surface, and a complementary braking surface that rotates in the same direction. According to the invention, the complementary braking surface is formed by a thin, flexible circular disk the diameter whereof is slightly larger than the diameter of the front face of the storage body. The elasticity of this disk is used to achieve a more uniform thrust pressure on each point of the braking surface of the storage body, and to secure the thread more or less tightly by means of a more or less intense thrust pressure, i.e.

Abstract: A servicing apparatus for automatic repair of yarn breaks in open-end spinning machines is provided with a device for replacing finished yarn packages with empty tubes, and a multi-functional yarn manipulating element having a work head equipped with a yarn brake and a contoured yarn guide element, the manipulating element being selectively movable between a position (c) at a top end of the tube for forming a top winding at the completion of winding a full yarn package, a position (a) at a base end of the tube for forming a yarn reserve winding upon beginning the winding of an empty tube, and a position (b) moving axially along the tube to prevent the creation of parallel windings during the repair of a yarn break.

Abstract: A yarn tension device includes a receiving plate and a pushing plate for clamping a moving yarn and a spring for urging the pushing plate toward the receiving plate; at least one of the receiving plate and the pushing plate is rotatably supported, a drive source drives the rotatable plate, and as a result the device can be maintenance-free.

Abstract: A disk brake for placing tension on textile yarns is provided with an air-cleaning system for blowing lint and fiber dust particularly from the underside of the disks to prevent a buildup which may interfere with operation of the brake disks and prevent proper clamping action between the disks.

Abstract: A yarn tensioning device 10 having three pairs of spring loaded tensioning disks 20 that exert an increasing incremental pressure on the yarn 12 which correlates to the tension in the yarn. The three pairs of tensioning disks 20 are mounted on the front side 42 of a bracket 40 around a post 90. The three posts 90 are coupled together on the back side 44 of the bracket 40 by a back plate 100. A threaded rod 108 is inserted through a center hole 48 in the bracket 40 and threadably engages the back plate 100, such that as the threaded rod 108 is rotated, the back plate 100 moves towards or away from the bracket 40. As the back plate 100 moves away from bracket 40 the posts 90 gets closer to the tensioning disks 20, thus increasing the amount of pressure exerted on the tension disks 20 by the springs 70.

Abstract: A thread tensioning device for a sewing machine includes two plates engaged on a shaft and a spring for biasing the plates toward each other in order to clamp a thread. The plates each includes a thread receiving portion and each includes another portion opposite to the thread receiving portion. A projection is engaged between the opposite portions so as to separate the opposite portions away from each other and so as to form a closely contacted outer peripheral portion in the thread receiving portions, and in order to force the thread toward the shaft.

Abstract: A yarn brake has two brake disks, retained with axial play in a support or bearing device, which are retained against one another via resiliently yielding device, such as permanent magnets. The brake disks are rotatably supported in the support or bearing device. Via an oscillatory motion generator, such as an electromagnet, mechanical or other device, the support or bearing means is set into mechanical oscillation that is essentially axial to the brake disks or in other words parallel to the axis of rotation defined by the rotation of the brake disks. The brake disks are carried along only slightly or not at all by the support or bearing device and the oscillatory motion generator.

Abstract: A weft yarn presentation apparatus has a weft sequence control having weft thread presenting devices (1), a controlled thread clamping device (2) with several clamps (3a-3f) and a guide member (4) with a slit (5). The association of the weft thread presenting devices (1) with the clamps (3a-3f) guarantees that there is no cross-over of the tracks of the weft threads, and the displacement of the clamps in the reference plane (6) does not influence these tracks. The weft thread is presented to the gripper in the reference plane (6), through matching of the movements of the clamp and of the associated weft thread presenting device (1) so that contact between the weft threads is prevented.

Abstract: A thread tension device for overlock sewing machines, which provides a thread tensioner and a regulator. The thread tensioner includes a pair of thread tensioning discs supported on a rotatable shaft and slidably movable axially on said shaft and a spring having one end supported on a spring holder threadably movable on a sleeve and the other end abutted against one of the thread tensioning plates. The regulator includes a rotary member fixed to the shaft and rotatably driven with the shaft; and a follower having one side held against the rotary member and the other side abutted against the other one of the thread tensioning plates over the spring.

Abstract: A thread tensioning device comprising a stationary electromagnet mounted on a sewing machine arm and a tensioning wheel having a relatively low mass. The tensioning wheel is rotatable concentric to a longitudinal axis of the electromagnet and is mounted on the electromagnet so as to be moveable only slightly in the direction of the longitudinal axis. A friction disk is positioned at one end of the electromagnet so as to be between the electromagnet and the tensioning wheel. A current flows through an excitation winding in the electromagnet and its value is varied within given limits by a suitable current control device, thereby causing the electromagnet to pull a flat side of the tensioning wheel with corresponding force against an application side of the friction disk, whereby a corresponding variable thread tensioning force is applied to a sewing thread passing through the tensioning wheel to the sewing machine.

Abstract: A yarn tensioner or brake for textile knitting machines having several tensioners on a support rod, each tensioner having a pair of tension cups which are pressed against each other by compressed springs supported from a stationary support. In a first embodiment, a stationary tension cup forms the stationary support and a floating tension cup alternates with respect to a stationary tension cup of an adjacent tensioner. The stationary tension cups have cylindrical protruding guides which slip fit into and guide the floating tension cups. In another embodiment, a stationary support supports compressed springs on both sides. The stationary support is formed of a circular support wall which has cylindrical protrusions on opposing sides and sized to slip fit into respective floating tension cups. A pair of stationary supports positioned on the support rod to support and guide opposing floating tension cups against each other. Each respective floating tension cup is driven by a respective coil spring.

Abstract: A thread brake with two disc shaped or plate shaped brake elements resiliently pressed against each other operates with an associated oscillation generating device to set the brake elements in oscillatory motions which are preferably oriented transversely to the bearing axis of the brake elements.

Abstract: In the case of a thread braking device (B), which is intended to be used especially on the supply side of a thread feeder (F) and which comprises a thread brake (3) having a fixed passage axis (f) and having arranged thereon a shield surface (A) provided with a thread opening (22) and arranged transversely to the direction (R) in which the thread (Y) is supplied, there are provided direction adjustment means (M) for the shield surface (A), with the aid of which the transverse position of said shield surface (A) can be adjusted to supply directions (R1, R2) of the thread (Y) deviating from the passage axis (f). Even in the case of a shield surface (A) for general thread-guiding tasks, which is arranged in a stationary holding means and oriented transversely to the supply direction (R) of the thread (Y), such position adjustment means are provided so that the transverse position of the shield surface (A) can be adjusted to the respective supply direction (R1, R2) of the thread (Y).

Abstract: A thread clamping device for a textile machine includes a clamping pad which is pressed against a clamping rib by a compression spring. The spring force can be adjusted, independent of other like devices associated with the machine, by an adjusting mechanism including a slider with an inclined surface supporting one end of the spring, wherein movement of the slider alters the precompression of the spring. The clamp is normally held open by a cam which overrides the spring, but when thread tension falls below an adjustable threshold, a tension monitor automatically activates the clamp.

Abstract: The thread tension regulating apparatus comprises; thread tension setting means for selecting and setting thread clamping pressure to the right pressure coping with plural kinds of the stitches; thread tension fine-adjusting means for allowing fine-adjustment of thread clamping pressure in the thread tension regulating apparatus by moving clamping pressure of the thread tension regulating apparatus from the original position to a higher position; said clamping pressure having been adjusted by said thread tension setting means; and home-position resuming means for returning the thread tension fine-adjusting means to the home position from another position when selecting and setting another thread tension by using the thread tension setting means.

Abstract: A thread tension device including a plate fixed on a sewing machine, a bolt rotatably engaged in the plate, a pin engaged on the plate, a dial rotatably engaged on the bolt and having a number of holes for engagement with the pin, a pair of levers extended from the plate, a pair of discs engaged between the plate and the dial for clamping a thread, a follower threadedly engaged on the bolt and having two notches engaged with the levers, a spring biasing the discs together, whereby, the follower is rotatable by the dial when the dial is pushed inwards of the knob.

Abstract: A tension regulating device can set an indicating value of a thread tension. The tension regulating device comprises a regulating nut which is screwed into the male portion of a tension regulating shaft for compressing the tension regulating spring and a regulating dial having scales. The regulating dial is rotatable to turn the regulating nut to set the tension of a thread, which is held by the tension discs in response to the turning position of the regulating nut. The tension regulating device further comprises a regulating dial stop retained by a step portion of the tension regulating shaft and a short cylindrical member fixedly engaged in the cylindrical portion of the tension regulating shaft for clamping the regulating dial stop. The short cylindrical member has spline grooves defined at the outer periphery thereof.

Abstract: A device including an axle rotatably supported in a sewing machine, a shaft fixed in parallel to the axle, one or more cams fixed on the axle, a lever having one end pivotally fixed and having the other end slidably engaged with the cam, and a gripping device including a pair of members disposed on the shaft and a spring disposed between the lever and the members so that a thread can be gripped between the members, and the lever can be caused to move toward or to move away from the members so that a tension force applied to the thread can be adjusted.

Abstract: An automatic winder is provided with a tension sensor for detecting the tension of travelling yarn in each winding unit and a tensor for controlling the tension of yarn in accordance with a yarn tension variation signal provided from the tension sensor, to thereby eliminate the variation of yarn tension.

Abstract: A tension shaft projects upwardly from a frame. A tension adjusting nut is adjustably screwed into an upper portion of the tension shaft. A pair of tension disks are rotatably supported by the tension shaft. A tension spring is supported by the tension shaft between one of the tension disks and the tension adjusting nut for urging one of the tension disks toward the other tension disk. A thread guide member fixed to the tension shaft has a plurality of thread holes. The device is characterized in that a bobbin thread threaded into the plurality of thread holes is elastically clamped between the pair of tension disks.

Abstract: Apparatus for dispensing at least one thread to the head of a recipient of a hair replacement unit for interweaving the thread with the recipient's natural hair comprising a housing including a front wall defining an opening and including a cavity for supporting a spool of thread and at least one thread-tensioning device including a bracket mounted within the cavity and against a wall of the housing defining a thread-accepting aperture, a pair of washers mounted adjacent the thread-accepting aperture each having a convex surface and arranged so that the convex surfaces face and engage one another so as to define an annular groove therebetween, and a spring for biasing the washers in engagement with one another so that thread routed from the thread spool can be routed through the thread-tensioning device so that the thread extends through the thread-accepting aperture in one direction, around the washers so as to extend through a section of the annular groove defined therebetween, and back through the thread-a

Abstract: A clamping brake for selectively braking each thread in a warp mill having a plural number of threads includes first and second brake disks which can move together to brake a thread in a thread guide positioned between the brake disks. The second brake disk is moved by pneumatic fluid, opposed by either gravity or a spring force.

Abstract: The disclosure relates to an apparatus for generating an electric signal corresponding to thread movement in a thread brake in textile machines of different types. A transducer element (9, 21) of piezoelectric type is disposed in direct contact with an element (3, 18) included in the brake and, by the intermediary of a further element included in the brake, or directly, is in contact with that thread (13) which is to be braked and sensed, so that movements which occur in the thread (13) on braking thereof shall be transmitted to the transducer element (9, 21) and the electric signal corresponding to thread movements is impressed on a monitoring circuit for indication of whether the signal ceases during a period of time when the signal should exist. It is possible to arrest the operation of the machine upon loss of the signal.

Abstract: A device and method for winding conical bobbins with yarn withdawn at constant speed from individual spinning units, and comprising: a deflecting roller, or similar element, which is connected to and moved backwards and forwards by a swinging arm which by storing and returning the yarn compensates for the different speeds at which the yarn is collected on the conical surface of the bobbin under formation wherein yarn is drawn into the storage position and is then released from this storage position, (i.e. returned).

Abstract: A device and method for winding conical bobbins with yarn withdrawn at constant speed from individual spinning units, and comprising: a deflecting roller, which moves backwards and forwards by a swinging arm, which compensates for the different speeds at which the yarn is collected on the bobbin under formation wherein yarn is drawn into the storage position and is then released from this storage position, (i.e. returned). This returning operation releases the yarn from its storage position and replaces it (returns it), to its normal feed path; two proximity sensors which defines the range of swing of the yarn storage and return arm; an electronic control unit which receives an electrical signal from the proximity sensors when the arm swings stray outside the regular range to generate, an electrical control signal which activates a pressure variator which varies the pressure on a disc yarn tensioner. This changes the tension on the yarn to return the storage swing to within the regular range.

Abstract: A disc-type yarn tensioner consisting of one or more tensioning elements in series, each composed of a pair of idly-rotating mutually facing discs of which the first disc is able to undergo only rotary movement whereas the second disc is able to rotate, translate axially, and incline its axis of rotation by the effect of the engagement between a rotating cylindrical cavity and a fixed spherical surface.

Abstract: A plurality of tension disk assemblies in an overedge sewing machine are disposed on a shaft supported for rotation around its axis and are spaced apart from each other in an axially distributed relationship. Each tension disk assembly comprises first and second tension disks forming a pair for holding therebetween a thread to be tensioned. The first tension disk is movable in opposite directions axially of the shaft, and the second disk is substantially immovable in the direction of the axis of the shaft. The resilient force of a spring acts on each first tension disk, whereby the latter is pressed against the second tension disk associated therewith. When the shaft is turned, as by a manual operating lever, this rotary motion is converted into a linear motion through a cam device. This linear motion removes the resilient force of the spring from the first tension disk. Thus, a thread tension released state is established simultaneously in the plurality of tension disk assemblies.

Abstract: A yarn feeding device comprises a rotatable drum, a yarn-braking unit through which the yarn is guided at a certain wrapping angle, and a moveable detector element lying against the yarn for surveying the tension thereof and for detecting a possible yarn breakage. For enhancing the dynamic behavior of the detecting element and for reducing erroneous fault indication as generated by the detector element, the detector element is tensioned against the yarn such that the wrapping angle of the yarn passing the yarn-braking unit is increased when the yarn tension decreases.

Abstract: A rotating driven brake plate apparatus of a yarn tensioning device includes a brake plate, a brake plate carrier having an end, a ball and socket device centrally and swivelably supporting the brake plate at the end of the brake plate carrier, and a device disposed outside the ball and socket device for driving the brake plate.

Abstract: A thread brake mechanism is provided which is adapted to be attached to a spindle assembly of a thread processing machine and which is characterized by a construction for use with two independent individual threads which may be fed into the spindle assembly at varying tensions and which applies respective braking forces to the individual threads depending upon the respective feeding tension thereof.

Abstract: Yarn is clamped between two rotatably mounted brake plates. The lower brake plate lies on an annular housing portion and the upper brake plate is held and centered by a guide plate. Weighting discs lie on the guide plate and are secured by a pair of clamping projections. The guide plate is displaceable on a U-shaped loop member and is prevented from rotating thereon and is itself secured by pairs of clamping projections.

Abstract: A sewing machine is equipped with a needle thread tensioning device which has two gripping discs mounted on a pin. The gripping discs are connected via a spring mechanism with two adjusting members on the same axis capable of movement relative to one another, of which at least one is mounted on a threaded section of the pin. In addition, the tensioning device has a mechanism for occasional suspension of the effect of the spring. With the tensioning device, in spite of the common mounting of both the adjusting members on the same pin, two tensions of varying degrees, a main tension and an auxiliary tension, can be adjusted and transmitted to the needle thread independently of one another and quickly switched one for the other. For this purpose, the two adjusting members are designed as inner and outer parts and separated from one another by a stationary support placed between the inner and the outer part.

Abstract: Device for regulating the tension of a thread through the different transformation operations to which said thread is subjected during its manufacture, said device being of the type forming an assembly comprising cups between which passes the thread, said cups being mounted on a hub and locked in position one against the other by way of a nut, and said hub being mounted on a rotary shaft which is common to all the positions of one face of the machine, device wherein: the cups are mounted in pairs on either side of a cylindrical track which is fast in rotation with said cups, said track having a diameter at least equal to the diameter of the circle of contact between the two cups, and said thread being, while thrown, in contact with the central cylindrical track, and after throwing, pushed back onto the side tracks constituted by each pair of cups in order to be placed in the normal working conditions after throwing; and the nuts holding each pair of cups one against the other enable a variation of their press

Abstract: A controllable and adjustable yarn tensioner having two rotationally driven brake plates, between which yarn to be placed in tension is guided, includes first and second rotationally supported shafts, one of the brake plates being disposed at one end of the first shaft, the other end of the first shaft having an operative connection with a driving device; the other of the brake plates being disposed at one end of the second shaft; both the first and the second shafts being in mutual alignment along a common rotary axis, the other end of the first shaft being also connected, via a transmission system disposed outside of the brake plates, to the other end of the second shaft; one of the two brake plates having a compression spring contributorily determining the braking force at which the brake plates are applied, whereby the braking force is adjustable by adjusting the length of the spring; the first shaft being axially slideable; and a brake plate-disengagement device connected to the first shaft.

Abstract: An assembly for a bobbin creel includes a rod-shaped support and thread tensioners connected to the support, the support being a rod with a hollow profile and formed with a longitudinal slot; each of the thread tensioners having a drive unit, a loading unit and at least one cup-type thread brake connected to the drive unit; the cup-type thread brake having a substantially horizontal axis of rotation; the drive units of the thread tensioners being disposed in the interior of the rod with the hollow profile; a common drive element connecting the drive units to one another; and a releasable clamping element connecting the cup-type thread brake to the support.

Abstract: A controllable and adjustable yarn tensioner having two rotationally driven brake plates, between which yarn to be placed in tension is guided, includes first and second rotationally supported shafts, one of the brake plates being disposed at one end of the first shaft, the other end of the first shaft having an operative connection with a driving device; the other of the brake plates being disposed at one end of the second shaft, the other end of the first shaft being also connected, via a transmission system disposed outside of the brake plates to the other end of the second shaft, the first shaft being axially slideable; and a brake plate-disengagement device connected to the first shaft; at least one of the two brake plates being connected to an adjustable compression element contributorily determining the braking force at which the brake plates are applied; the first and the second shafts having respective rotational axes spaced from and parallel to one another.

Abstract: A thread withdrawn from a bobbin is passed along a straight line through a plate brake. A base brake plate is driven by a drive extending outside the periphery of the base brake plate. A tensioning device removably attached to a top brake plate is connected therewith by a ball snap-type connection. It comprises a first compression spring with one end supported at a gripping sleeve and slideable along a pressing pin surrounded by this compression spring. The gripping sleeve is connected to a displaceable control plate extending parallel to the pressing pin. This control plate permits a simultaneous variation and adjustment of the pressure exerted by a number of such similar tensioning devices. A second compression spring surrounding the pressing pin is supported at a side of the gripping sleeve remote from the first compression spring and counteracts the first compression spring, so that the difference of the spring forces acts upon the top brake plate.

Abstract: A fishing line loader is disclosed. The loader includes a base, upstanding sidewalls and a shaft. A fishing line spool may be mounted on the shaft between two disks. A crank is provided on the shaft and a clutch has drive pins which extend through one of the disks to drive the fishing line spool. An elastomeric bearing urges one of the disks against the fishing line spool to restrict rotation of the spool relative to the shaft. Guides define a path for the fishing line in a direction parallel to the shaft.

Abstract: A disc type tensioning, or braking device for a float heel knitting machine.

Abstract: Thread brake for creels having at least one pair of braking discs with a central rotary drive and at least one separate rope friction body, including an adjustable loading device having a loading element, a common holding device for the rope friction body and for the adjustable loading device, the rotary drive having a central vertical shaft holding the pair of braking discs including an upper braking disc comprising a braking disc member and a disc holder secured thereto, the disc holder being formed of plastic material and connected to the shaft so as to be fixed against rotation relative thereto and a lower braking disc resting on the loading element of the loading device.

Abstract: A tension regulator in a double twister comprising a tenser body including a plurality of stages and ring tensers freely fitted in the respective stages of the tenser body. The tension regulator is mounted on the top end of a cop placed at the center of a stationary disk.

Abstract: A tension device for sewing machines is disclosed having thread tensioning discs and a linear actuator for applying a compressive force between the discs. The invention is characterized in that for any given tension setting of the device, the applied compressive force, or tension, remains constant regardless of any variations in the spacing of the discs due to variations in the thread thickness, up to the range of travel of the linear actuator.