Showing papers on "Bend radius published in 1998"

Fiber optic cable bend radius controller

Abstract: An apparatus and method for guiding, protecting and providing bend radius control for fiber optic cables is provided. Channel members having slots are used to connect fiber optic cable termination enclosures and raceway systems. In accordance with the invention, a fiber optic cable bend radius control device is snapped into each slot in the channel member. Projections on the fiber optic cable bend radius control device retain the device to the edges of the slot. The fiber optic cable bend radius control device has a gradually curved surface. Fiber optic cables extending from the enclosure to the raceway system through the slot rest on the curved surface on the fiber optic cable bend radius control device. The curved surface of the fiber optic cable bend radius control device provides a smooth, continuous surface for guiding, protecting and controlling the bend radius of fiber optic cables as they pass through the slot.

Outside corner fitting for use in a duct system

Abstract: An outside corner fitting (10) including an arcuate channel (16) having a radius of curvature greater than a predetermined minimum bend radius for the cable to be installed in the duct system A first embodiment of the invention fits within straight ducts and allows the straight ducts to be placed flush with the outside corner of the wall A second embodiment features an outside corner fitting that abuts against the straight ducts and is mounted directly to the wall Both embodiments include a cover (12) having a first edge and a second edge, the first edge being shorter than the second edge The shorter first edge minimizes the gap between the cover (12) and the wall if the wall is not exactly 90 degrees

Device for limiting the bending radius of a flexible duct

Abstract: The invention concerns a device for limiting the bending radius of a flexible duct comprising at least a bend stiffener (7) arranged around one length of the flexible duct and fixed by a rear part on a fixed end support (19), characterised in that it further comprises an element for maintaining (6, 6', 6') the bend stiffener (7) arranged between the flexible duct (1) and the bend stiffener (7) and comprising at least a portion capable of flexural bending extending over one length of the flexible duct located at least between the rear part and the end of the bend stiffener.

Optical fiber cassette

Abstract: A cassette stores varying lengths of excess optical fiber defined during the installation of optical fiber cable. The cassette has two spools and numerous pathways for winding and storing excess optical fiber, while maintaining the minimum bend radius. Retainers hold the optical fiber in the pathways and on the spools. Two splice receptacles releasably retain splice connections. A tension wire tie-down is provided, having a variety of options for placement and direction, to clamp the optical fiber cable, and electrically ground the tension wires. Tabs are provided for releasably locking the hinged cover in the open and closed positions.

Wire terminal block for communication connectors

Abstract: A wire terminal block for communication connectors. The block includes a mandrel, and a frame arranged for mounting on a printed wire board and for supporting the mandrel on the board where a number of terminal wires emerge to contact a mating connector. A number of slots are formed along the mandrel, and an inner contour at a base of each slot is configured to form a desired bend radius in the terminal wires when the wires are seated in corresponding ones of the slots and are wrapped about the mandrel within the slots. In one embodiment, the inner contour of the mandrel is configured to form a first bend radius in the terminal wires at a side of the wire board from which the wires emerge, and to form a second bend radius in the terminal wires with which the wires angle back over an opposite side of the wire board to contact the mating connector.

A device for transferring fluid between equipment on the seabed and a surface unit

Abstract: A device for transferring fluid between equipment on the seabed and a surface unit. At least one flexible pipe extends in a catenary curve. An intermediate buoyancy and support member associated with the pipe splits the pipe into two parts, an upper part and a lower part. The intermediate member imparts to a region of the upper part a concavity facing the seabed. A yoke on the pipe and a cable from the yoke retain at least one region of the lower part of the pipe. The cable is connected to a fixed member on the seabed for tensioning the lower part of the pipe. The cable and the fixed member impart a bend to the region of the lower part of the pipe, the concavity of which faces the equipment on the seabed. The intermediate member is connected to the fixed member. The cable between the lower part of the pipe and the fixed member has a length at least equal to the minimum bend radius of the lower part of the flexible pipe.

Method and apparatus for manufacturing bent products

Abstract: The invention relates to apparatus and methods for manufacturing a bent product by press bending a malleable material. The bent product is bent along the lengthwise axis and has a bottom wall and at least one sidewall in cross section. The apparatus preferably includes a die having within its surface a recess. The recess is bent along the lengthwise axis. The apparatus also includes a punch that may be inserted into the recess of the die. The die and the punch substantially correspond to each other such that the die and the punch include a first portion having a first bend radius corresponding to a lengthwise bend in the bent product and a second portion having a second bend radius corresponding to a linear region of the bend product. If the first bend radius is smaller than the second bend radius, chamfered faces formed in the die and punch are shallower and narrower in the first bend radius than the second bend radius. This relationship permits the folding of the material within the lengthwise bend region to be completed before the folding of the material by the die and punch regions having the larger bend radius.

Bend radius control jacket

Abstract: A control jacket (400) houses a line, such as a fiber optic ribbon cable or other conductor, and limits the amount of bending and twisting movement of the line. The jacket preferably includes a multi-dimensional matrix of engagement elements (450) separated by a plurality of gaps (460) and connected by an underlying web structure. As the jacket is bent or twisted, adjacent engagement elements move together into engagement with each other, limiting the bend radius or twist angle of the jacket, and thus of the fiber optic ribbon cable or other protected line. A control jacket according to the invention includes two slidable jacket portions (410, 420). Locking structure (425) locks the two portions of the control jacket together and prevents them from separating, but permits sliding movement in a longitudinal direction along the line. This accommodates the radius of curvature differential that occurs upon bending/twisting of the control jacket and consequently reduces strain in the locking structure.

Method for bending and device therefor

Abstract: PROBLEM TO BE SOLVED: To provide a method and device for bending that the precise bending radius R is obtained even when deflection is generated at a bending part of a working piece such as a pipe and bar. SOLUTION: A pipe 1 is made to pass through a guide roller 4, a ring-shaped heating coil 2 by high frequency induction heating, and then after got through a cooler 3 is clamped by a clamp 6 at the fore end and by a pusher 8 at the rear end. Further, an angle detector 9 for a rotary shaft 7, a position detator 10 for the pusher 8 and the like are provided for the bending device. After heated up to a specified temperature, the pipe 1 is pressed in the axial direction of the pipe 1 by the pusher 8. R indicates a bending radius, and M indicates a rotation radius of the clamp 6 on a turning arm. (a) indicats a state at the biginning of bending of a pipe set on the device, (b) indicates a state of being bent at 90 deg., and (c) indicates a state of being bent at 180 deg.. With the progress of bending of the pipe 1, the rotation radius of the clamp 6 of the arm 5 is made gradually smaller. The clamp rotation angle is regulated by a bending angle obtained by calculation from feeding amount of the pipe 1 and by an actually measured rotation angle of the turnigh arm.

Method for bending pipe

Abstract: PROBLEM TO BE SOLVED: To decrease a thickness reducing rate on the outer peripheral side of bending even when a pipe to be worked is longer and thinner in a method for bending the pipe by a rotary pull bending method SOLUTION: The side of one end part of the pipe P to be worked is held with a bend roll 1, the outer peripheral side of the bending part of the pipe P to be worked is engaged with the groove 31 of a die 3 After respectively clamping the inner peripheral side of bending and outer peripheral side of bending on the side of the other end part of the pipe P to be worked with an inside clamp 4 and outside clamp 5 and, in the state in which compressive load is applied to the outer peripheral side of bending in the bending part of the pipe P to be worked with the outside clamp 5 and also tensile load is applied to the inner peripheral side of bending in the bending part of the pipe P to be worked with the inside clamp 4, the bend roll 1 is rotated and, by pulling out the bending part of the pipe P to be worked from the groove 31 of the die 3 and mating the bending part with the bend roll 1, the pipe is bent into a bend radius in accordance with the circular-arc of the bend roll 1

Method and apparatus for access of optical fibers in a ribbon

Abstract: A method for performing fiber break-out in an optical fiber ribbon, which does not require shutting down the fibers in the ribbon while break-out is being performed, includes the step of placing the ribbon on a smooth surface that is either flat or curved with a radius much greater than the critical bend radius after the matrix material of the ribbon has been softened and swollen. The ribbon is temporarily affixed to the surface, and the softened matrix is then pulled away therefrom. The ribbon is then turned over and temporarily affixed to the surface and the remaining matrix is removed. The fibers that remain are then cleaned with an alcohol solution. In a variation of the method, the matrix is removed by rubbing or abrading it with a textured cloth or pad.

Method and apparatus for storing surplus adss cable

Abstract: A method of storing surplus ADSS cable includes steps of laying out a length of cable along an serial route defined by a series of poles and forming loops of surplus cable at occasional pole. The cable is raised to a predetermined installation at each pole. Two dead-ends (12, 14) at the pole secure the ends of the loop so that the loop (20) is substantially free of tension. The center of the loop is raised and secured to the pole while maintaining the minimum bend radius. thus forming two bights in the loop. A bend radius protector 40) is installed in each of the bights to protect the cable. Each bend radius protector is suspended from a cable protecting sleeve (50) placed over the taut cable (10), so that the cable is not damaged.

Optical fiber cable

Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber cable capable of preventing the bending exceeding allowable bending radius without using a structure of special materials such as a bending preventing wire. SOLUTION: A clad 2 is formed on a core 1, and a sheath 3 and a bending preventing coating 4 are provided on this. Circumferential projection and recession are formed on the bending preventing coating 4 so that the adjacent recessed part and projecting part can be brought into contact with each other at the time of bending, and the bending of a fiber exceeding the bending radius can be prevented. The bending preventing coating 4 can be used instead of the sheath 3, and protecting coating for wiring for smoothing operating wiring can be provided on the bending preventing coating 4. COPYRIGHT: (C)1999,JPO

Bend stability testing method for thin-walled tube esp. for testing of vessel catheter in medical application

Abstract: The method involves bending a test object with predetermined speed to test its bending stability, whereby the bending event and radius are determined through evaluation of predetermined points on a bending force to bending radius graph of the test object, especially through association of the bending radius to a maximum or a turning-point, or other differentially determined points of the bending force. The test body is ring-shaped, and is formed through ring conclusion of a tube section by device of a pin, or through welding, pasting or clamping.

Intrados induction heating for tight radius rotary draw bend

Abstract: A boost bend method of making tight radius bends in boiler tubes, such as bends having a radius of 1×D or less, in which a selected portion of the intrados of the tube is heated in a controlled manner thereby reducing the necessary tube wall thickness relative to the diameter of the tube for 180° bends. Tubes bent using the method may have wall thicknesses of about 6.6% of the tube diameter and suffer less than about 7% thinning of the extrados tube wall.

Test method for flexibility of telecommunication cable

Abstract: PROBLEM TO BE SOLVED: To evaluate the flexibility of a telecommunication cable in a laid state precisely by a method wherein the telecommunication cable is coupled and stopped via a peak-hold tension gage, the cable is wound on a cylindrical body at a central angle in a specific range and the tension of the cable is measured. SOLUTION: A telecommunication cable 10 one end of which is coupled and stopped via a peak-hold tension gage 11 is wound, in the range of a central angle of 90 deg., on a mandrel (a cylindrical body) M having a radius R of, e.g. 250 mm, and force which is applied to the coupling and stopping end of the cable 10 is measured by the tension gate 11. A measured value Fmax at a moment when the cable 10 is wound on the mandrel M expresses the flexibility of the cable 10 when the cable is bent actually in the radius R at a laying site, and a measured value Fhold at a time when the cable is held for a short while in a wound state in such a way that a force applied to the coupling and stopping end is stabilized expresses a bending force which is applied to the laid cable 10. In addition, it is desirable that the radium R of the mandrel M is set at six to ten times the wire diameter of the cable 10 as a minimum bending radius which is decided in advance when the cable 10 is laid.

Device to bend flexible electrical flat conductors in bending radius specified by device

Abstract: A device to bend flexible electrical flat conductors in a bending radius specified by the device comprises at least two connected molded parts (2,3) linked together, each with at least one front surface 910,11) bounding on a lower contact surface (5,6) and curved corresponding to the bending radius. The connected front surfaces of two molded parts form a bending surface provided for the required bending. The curved front surfaces of the two molded parts are together joined by a hinged link(4,16) serving to connect the two molded parts. Through this hinged link, the two molded parts are spaced away from each other in their initial bending position with their contact surfaces to be found in one plane and their curved edge faces pointing to each other, all this before execution of the required bending. Between the transition edges of the two molded parts formed by the contact surfaces and the curved front surfaces, the spacing to be found in the initial bending position corresponds to the length of the bending surface in its peripheral extent determining the bending radius. A hinged link mounting is provided in this curved bending surface to accommodate the hinged link in the connected position of the two molded parts after execution of the bending.

Stereoscopic wiring board, its manufacture and insulating material for board

Abstract: PROBLEM TO BE SOLVED: To provide a stereoscopic wiring board in which an insulating layer is prevented from being cracked or from being peeled off, even if a bend radius is small and which can be bent without a trouble even with the small bend radius SOLUTION: A stereoscopic wiring board 10 is provided with a metallic base 11, having a roughing processing face 11a, a polyimide film 12 as an insulating layer bonded to the roughing processing face 11a of the metallic base 11 and copper foil 14 for a conduction path, which is bonded to the other face side of the polyimide film 12 A process for manufacturing the wiring board 10 contains a roughing processing process for obtaining a roughing processing face 11a by plating or oxidizing the surface of the metallic base 11, a press- fitting process for obtaining a laminate member 20 by thermally press-fitting the polyimide film 12 between the roughing processing face 11a of the metallic base 11 and copper foil 14, a patterning process for etching copper foil 14 into a desired conduction path pattern and a bending process for bend-forming the laminate member 20 into a desired stereoscopic form with pressing

Cable bend limiter trough

Abstract: A trough for safely retaining and routing fiber optic cables having a predetermined minimum bend radius entering or exiting an opening of a building entrance protector. The trough comprises of a cylindrical elongated O-shaped body defining a hollow space therebetween for retaining the cables, and a semi-circular curved gap on the body which provides cables access to the space. A pair of ribs extend from the body for slidable engagement with slots of the openings of a building entrance protector. The cross-section of the cylindrical body and the semi-circular curved gap have a predetermined radius equals to or greater than the minimum bend radius prescribed for the fiber optic cables. The trough has two separate retention mechanisms for securing it with the openings of a building entrance protector. The first retention mechanism is of a protrusion-recess type, located at the ribs and slots of the opening respectively. The second retention mechanism is of a latch-groove type, located at the bottom section of the body and along the opening of the building entrance protector respectively.

Method for forming square steel tube

Abstract: PROBLEM TO BE SOLVED: To uniformize the bend radius of the corner parts in the cross section and to form a square steel tube excellent in appearance at the time of manufacturing the square steel tube by roll forming method using a round steel tube which is resistance welded. SOLUTION: At the time of forming the round steel tube which is resistance welded into a square shape by passing through the plural stage square forming stands consisting of an upper roll 1, lower roll 2 and side rolls 3, as for the forming rolls of at least one forming stand of them, the diameter of the upper roll 1 with which the upper side where the resistance welded part of the round steel tube exists is formed is taken as different diameter having the small diameter of 0.6-0.9 times the diameter of the lower roll 2 for forming the lower side and, by forming the round steel tube with these different diameter rolls, the bend radius in each corner part of the square steel tube is uniformized.

Fixing part for folded part of filmy board

Abstract: PROBLEM TO BE SOLVED: To provide a fixing part for a folded part of a filmy board, capable of easily bending the filmy board without damaging a conductive layer and simply keeping it in a mechanically bent condition without using an adhesive. SOLUTION: This fixed part consists of a columnar part 11b having a desired radius to give a bending radius to a filmy board 12 and two flat plate parts 11d, 11e linked in parallel with the columnar part 11b through a hinge part 11c, and is equipped with a holding part to hold the folded filmy board 12 on the columnar part 11b by the two flat plates 11d, 11e. A locking protuberance 11g is provided on the one flat plate 11e of the two flat plates 11d, 11e and a locking hole 11f to be locked with the locking protuberance 11g is provided on the another flat plate 11d.

Filling system for the Production of moulded parts from thixotropic metal billets in die-casting machines

Abstract: Each material entry channel (20, 21, ) has a circular or elliptic cross section with a substantially constant area over its entire length Directly adjacent to the material entry cavity (19) there is a bend (25, 26, ) Between the bend (25, 26, ) and the respective inlet opening (35, ) there is a straight tubular section The center line of the bend has a constant radius and a tangent at one end parallel to the longitudinal axis (1) of the cylindrical cavity (12) of the casting chamber Its tangent at the other end coincides with the center line of the respective straight tubular section

Manufacturing method of metallic strip with lower residual stress

Abstract: PROBLEM TO BE SOLVED: To reduce residual stress remained in metallic strip to a desired level by means of passing the metallic strip for electronic member of a lead frame and the like through a roller leveler, and controlling a bend radius and tension during passage therein correlatively by parameters. SOLUTION: Designating the tension in the roller leveler of the lead frame and the like during passage therethrough as σT, parameter α (α=2πσY/(ET)) and parameter designated as β (β=σr/σY) are correlatively controlled. As the case may be, the parameter β can be controlled by making β depending on α. E in the above is Young's ratio of metallic strip. ρ is a bend radius, T is the thickness of metallic strip. And a tension σT and the bend radius ρ of the roller leveler of the metallic strip are the tension and the bend radius at the entrance side of the roller leveler. Practical procedure in the correlative control is not limited, but the most simple way is either to control tension σr by preliminary set of the bend radius ρ or to control the bend radius ρ by preliminary set of the tension σT.

Bending reaction measuring device

Abstract: PROBLEM TO BE SOLVED: To provide a bending reaction measuring device capable of simply and accurately measuring bending reaction while continuously changing the bend radius of a test piece. SOLUTION: This measuring device measures the bending reaction generated between two points of a long test hose 20 when the portion between two points is curved into a semicircular shape with a detector 3 provided at one of two points. The measuring device is provided with the first moving base 2 changing the distance between two points while holding one end of the test hose 20 and the second moving base 4 changing the peripheral length of the test hose 20 between two points while holding the other end of the test hose 20. The shift quantity L2 of the moving base 4 is made proportional to the shift quantity L1 of the moving base 2, and bend radiuses R1 -Rn are changed while the test hose 20 is kept at the semicircular shape.

Reinforcing bar folding machine

Abstract: PROBLEM TO BE SOLVED: To easily and precisely bend the tip end part of a horizontal restrained reinforcing bar with a predetermined bending radius. SOLUTION: An arm plate 6 is installed to the tip end part of a hydraulic operating device 2. A disk-like collar 30 having a recessed part 30a wherein a tie hoop 28 is fitted is installed to the arm plate 6. The collar 30 is set between the tip end part 29a of the horizontal restrained reinforcing bar 29 and the tie hoop 28. A reaction receiving stopper 37 abutted to the horizontal restrained reinforcing bar 29 from the outside is installed to the arm plate 6. A half-circular bending arm 31 is pivotably attached to the tip end part of the piston rod 3 of the hydraulic operating device 2 with a supporting point pin 32. The supporting point pin 32 is guided with a guide groove 35 provided in the arm plate 6. A first roll 33 and a second roll 34 are provided in both ends of the bending arm 31. The moving range of the first roll 33 is regulated with the guide part 36 of the arm plate 6. The bending arm 31 is swung with the reciprocating linear motion of the piston rod 3 and the tip end part 29a is bent 180 degrees along the outer periphery of the collar 30.

Terminal for counter measure against unwanted radiation

Abstract: PROBLEM TO BE SOLVED: To provide a terminal for counter measure against unwanted radiation which is used in a liquid crystal display by arranging a movable part containing a bending part bending in a first bend radius upward from a bottom part and a part curving in the inverse direction of the bending part in a bend radius larger than the first bend radius on its rear side. SOLUTION: A terminal for counter measure against unwanted radiation is composed of a fixing surface 1a part with a circuit board, a sparingly 1b part, an attracting surface 1c part in an automatic machine and an 1d part of a part to prevent an overlap of mutual terminals. The 1d part prevents a condition where mutual terminals frequency overlap each other or the terminals are deformed or a great loss is caused in its processing when the terminal 1 for an unnecessary radiation measure is taken out of a metal mold and is sent to the next plating process, when this terminal is juxtaposed in a cassette and is sent or this terminal 1 is juxtaposed, arranged and is made to stand by in a terminal housing part of the automatic machine. The 1e part is set so that the 1d can jump away, and impairment of springiness of the terminal for an unnecessary radiation measure is prevented.

Wire bending equipment

Abstract: PROBLEM TO BE SOLVED: To provide a wire bending equipment capable of arbitrarily selecting the bending speed and bending radius, reducing the variance in the bending radius, preventing the breakage of the wire, and measuring the bending load and bending angle. SOLUTION: A wire bending equipment comprises a drive motor 14 to bend a wire 1, an arm fixed to a rotary shaft of the drive motor 14 in which a load cell 16 is embedded, an arm provided with a turning shaft 4 on a shaft end on the rotary shaft side and has a receiving part 18 to be fitted to the load cell 16, turning unit 9 to bend the wire 1 having a bearing holder 8 on the other end of the turning shaft 4, and an encoder 13 in which a pulley is arranged between the arm and the turning unit 9, and the revolution of the turning shaft 4 is transmitted through the belt and the pulley, the wire 1 is mounted on the turning unit 9 to freely bend the wire 1, and the bending angle and the bending load are detected.

Cuiding device for aerial cable laying

Abstract: PROBLEM TO BE SOLVED: To prevent an elongated aerial cable from hanging down by its dead weight. SOLUTION: A guiding device includes a belt 11, having curvature larger than a tolerable bend radius of a cable 6 for moving the cable 6 together, while the belt 11 is fitted to the inner bent side of the cable 6, a pushing means 12 for pushing the cable 6 to the belt 11 while the pushing means 12 is fitted to the outer bent side of the cable 6, turn pulleys 13 and 14 and a middle pulley 15 that rotate with the cable 6 while the cable 6 is pushed to the belt 11 by force of pushing means 12, around which the belt 11 is turned, and a torque control means 16 for controlling the rotating torque of the turn pulley 13 in the lower part and giving tension in the forward and backward directions to the cable 6 that is guided by the belt 11. In addition, a magnetic damping unit, a power clutch unit or the like is used as the torque control means 16.

Extruded material of aluminum or aluminum alloy for bending

Abstract: PROBLEM TO BE SOLVED: To reduce deformation such as wrikles and camber of the extruded material of aluminum or aluminum alloy with bending and to improve the min. bend radius (the limit of bending). SOLUTION: To the inside surface of the part to be bent of the extruded material, the reinforcement 1 of a thermosetting resin having length covering the whole of the length L of the part to be bent is stuck. When bending work is executed taking the surface to which the thermosetting resin 1 is stuck as the inside or the outside of bending, the deformation such as wrinkles and camber with bending work is decreased and the min. bend radius is improved. Or, the reinforcement 2 of the thermosetting resin is stuck in the longitudinal direction from the end face on the inside surface of one end part of the extruded material. When this extruded material is used for push-through bending, the part which is abutted on a push block is strengthened, so buckling is not generated and the min. bend radius is improved.