Abstract: The method includes providing a source of flat stock; forming the flat stock into a spherical shaped bead that includes connected semi-spherical bead halves with each half having opposed open recesses that are located in a circular edge that defines each semi-spherical half; providing a source of wire stock; forming the wire stock into a series of the interconnected links with each link having a middle section and contiguous opposed enlarged ends at respective ends of the middle section; positioning the formed links each between adjacently disposed spherical shaped beads for accommodation in facing recesses thereof; closing the connected semi-spherical bead halves to form the spherical shaped bead; and laser welding between the connected semi-spherical bead halves.

Abstract: Provided is a method of protecting a drag chain for a lumber mill and a drag chain having a chain guard and a lug guard. The chain guard and lug guard each only require use of a single weld washer for mounting.

Abstract: Provided is a method of protecting a drag chain for a lumber mill and a drag chain having a chain guard and a lug guard. The chain guard and lug guard each only require use of a single weld washer for mounting.

Abstract: A method for producing welded round and profile chains of chain links that are connected to each other. The chain links for round and profile chains produced by this method include two chain link partial pieces that are connected to each other by friction welding.

Abstract: A link chain comprises a chain link including two shank portions and two arc portions connecting the two shank portions. The two shank portions and the two arc portions define an interior space of the first chain link; and a dividing element extends inwardly from an inside surface of one of the two shank portions and extends inwardly from the inside surface of the other shank portion. The dividing element divides the interior space into two movement spaces, and the dividing element has a centerline, and the centerline is not a straight line perpendicular to the shank.

Abstract: A method for producing welded round and profile chains of chain links that are connected to each other. The chain links for round and profile chains produced by this method include two chain link partial pieces that are connected to each other by friction welding.

Abstract: The present invention relates to a method of assembling a metal bracelet (1) comprising two rows (2, 3) of outer elements assembled in pairs by pins (5) forming rigid links and at least one row (4) of intermediate elements mounted on the pins (5). The fixing of the pins (5) on the outer elements (2, 3) is carried out according to the following steps: on the inside lateral face of each outer element two blind bores with a flat bottom and of diameter greater than the diameter of the pins are produced, smooth pins are chosen and they are inserted in said bores, after the intermediate elements have been previously mounted on said pins, the pins and the outer elements are transparency welded by carrying out a bombardment with an electron beam on the upper or lower wall of the outer elements, a finishing operation is carried out on the bombarded surface in order to remove the weld bead.

Abstract: In a chain belt (1) for a continuously variable cone-pulley transmission of a vehicle, lengthwise links (3a, 3b, 3c) are connected by transverse coupling members (2a, 2b) passing through openings (4) in the links. Retainer elements (7) at the ends of the coupling members serve to secure the links against falling off the coupling members or becoming misaligned. The retainer elements are attached to at least selected individual coupling members by resistance welding.

Abstract: In a chain belt (1) for a continuously variable cone-pulley transmission of a vehicle, lengthwise links (3a, 3b, 3c) are connected by transverse coupling members (2a, 2b) passing through openings (4) in the links. Retainer elements (7) at the ends of the coupling members serve to secure the links against falling off the coupling members or becoming misaligned. The retainer elements are attached to at least selected individual coupling members by resistance welding.

Abstract: Link for chain having an extent about an aperture defines a section which is wider near the inside with the section being usually concave outward on each side. A junction link comprises a C member and a bridging member with a cross section generally similar to the link A method of assembling the bridging member to the C member involves providing two pairs of aligned apertures. In each pair a rivet like member with a head end and a free end has its free end inserted through the aligned apertures, after which a head is formed on the free end by arc welding.

Abstract: A chain connecting link has a C-shape main part having a pair of ends with confronting and spaced end surfaces and a filler part engaged between the ends and having a pair of oppositely directed end surfaces confronting the end surfaces of the main-part ends. Respective bodies of weld metal are engaged between the main-part end surfaces and the filler-part end surfaces so that the filler part solidly interconnects the ends of the main part. The parts are both made of tempered and annealed steel. Each of the end surfaces can be formed by a pair of substantially planar faces meeting at a straight edge. The straight edges extend generally in a plane including a longitudinal center axis of the link and the faces form four laterally open V-shaped notches each holding a respective such body of weld metal. The faces of each surface lie at an obtuse angle to each other. Normally the edges are rounded.

Abstract: The invention concerns a method for welding hinge pins onto links each formed of one or more elements, the links being connected to each other by means of said hinge pins arranged in passages provided for this purpose in the links, each pin being fixed onto one of the links and hinged onto the next link, characterised in that the connection of the pin to the link is made via an arc welding operation with the aid of an electrode in an inert atmosphere without using a solder.

Abstract: A chain link (1) consists of two loops (2a, 2b) and two sides (3a, 3b), and a post (5) welded in between the chain link's sides (3a, 3b). The post (5) has sections (7) of reduced thickness against the chain link's sides (3a, 3b) in order to produce weld grooves for welding the post (5) to the chain link's sides (3a, 3b) with a through-weld. A sacrificial anode (9) is affixed around the chain link's post (5), by means of casting, welding or clamping.

Abstract: This disclosure relates primarily to the making of compressed single and double arrow jewelry chains, of precious or non-precious metal, and other unique surface designs, from open link chains wherein the regularly repeating apertures of the prior art chains have been substantially eliminated, thereby providing an exceedingly smooth look and silky feel to the completed chain. The compressed chain of this invention is made by first precisely aligning two or more open link chains together, side by side, along a single longitudinal axis, welding, as by soldering or brazing, the aligned open link chains, and subjecting the thusly aligned chains to a series of incremental compression steps, along the longitudinal axis of the aligned curb link chains. In this way, the regularly repeating apertures of the aligned open link chains are substantially eliminated while creating, as in the case of the use of single curb chains as the starting point, novel non-apertured arrow designs.

Abstract: The present invention provides a die forged stud link chain which comprises substantially .theta.-shaped complete stud links (1) (FIG. 2) formed by means of die forging and substantially .epsilon.- shaped semi-finished stud links (2) (FIG. 3) feasible to be formed into a exceeding 45.degree.. The stud link chain can be produced mainly by using a die forging process and a minimum welding process, so that a decrease in the shearing stress applied to the shoulder part due to bending can be avoided. Further, steel materials superior in decrease of the shearing stress and in the tensile strength can be employed. The resulting stud link chain is lightweight and superior in resistance to fatigue failure.

Abstract: An aluminum alloy chain is formed from welded loops of aluminum rod that constitute the individual links of the chain. During welding, a weld bead is produced by fusing opposed ends of bent aluminum alloy rod stock and pressing the ends together while fused to create a weld bead that extends beyond the perimeter of the rod stock, at least in a direction towards the inside of the link. The aluminum alloy chain can be anodized entirely or at selected intervals to provide a colorful chain or to provide a measurement of the length of the chain. The chain is particularly adapted for use with anchors used in connection with nautical vessels.

Abstract: The repair link is a C-shaped member and a junction member, the junction member having enlarged tongues with narrower roots and the C shaped member is complementary. Welding to hold the junction member in place preferably is caused to adhere to the C-shaped member rather than the junction member.

Abstract: An automatic soldering machine for soldering a rope chain comprises a pair of gears, each with a peripheral surface defining a trench which engages one of the strands of the rope chain and which is rotatable to precisely feed and place successive link junctions of the chain relative to hollow solder applying needles. The needles are reciprocally movable and serve to apply a premeasured amount of solder paste at the link junctions of the rope chain. A heater, for example, an induction heater, heats the chain, causing the solder to flow and then set and thereby secure the chain links together.

Abstract: A method and apparatus for opening the bolt of a fastener, inserting an end cap D-ring, or quality tag. The method and apparatus comprises using a first clamp configured to receive therein a fasteners, a second clamp being configured to engage a latch or bolt of the fasteners, a robot gripper and control means to effect the opening of the fastener, the insertion of an end of a chain into the fastener and the closing of the fastener. The movement of the latch or bolt knob is coordinated with the movement of the fastener such that the forces acting on the bolt knob are substantially parallel to the direction of travel of the bolt in the fastener.

Abstract: A robotic chain assembly which uses two clamps, a robot gripper and a computer with auxiliary stations. The assembly both measures and cuts the chain, secures fasteners to the ends of the chain and secures the fasteners one to the other.

Abstract: An improved passenger car tire chain employing heat treated medium carbon steel is disclosed. The improved tire chain is approximately twice as durable as that presently furnished to meet NACM-5179(TC) for Type PL chains when AISI 1026 or 1029 carbon steel is employed at least for links of a cross chain meeting the road surface. The cross chain links are closed by welding prepared abutting link ends which have been previously beveled. After being welded closed, the cross chain links are case hardened, quenched, tempered and air cooled. The improved tire chain is then assembled in a conventional manner to include a pair of side members, fastening means to secure a end of each side member to the other end, and a plurality of cross chains extending between the sidewall members at preselected intervals.

Abstract: A device for feeding in parallel of ornamental chains to an operative unit of a machine suitable for realizing the bonding of the chains, including a mechanism for the transport of the chains towards the operative unit arranged for the engagement with side by side links of the chains and for obtaining the simultaneous and intermittent advancement without modifying the symmetry of their reciprocal position with respect to the advancement axis. The transport mechanism, comprising in particular needle-shaped members, are provided with a reciprocating translational motion in the forward direction and a reciprocating lifting and lowering motion in an orthogonal direction.

Abstract: A machine for the production of paired chains including a feeding assembly for the chains, a welding assembly of the chains and a take-up device for the produced chain. The feeding assembly for the chains includes a transport mechanism thereof suitable for the engagement within corresponding side by side links and for realizing the simultaneous and intermittent advancement without modifying the symmetry of their reciprocal position with respect to the advancement axis. The transport mechanism, constituted in particular of needle-shaped members, is provided with a translational reciprocating motion in the advancement direction and of a reciprocating lifting and lowering motion in an orthogonal direction. The welding assembly, constituted of two equal assemblies in series, provides for the simultaneous movement of means delivering the welding flame and the welding material. The take-up device operates synchronously with the feed of the chains in order to maintain constantly taut the chain during the welding.

Abstract: An apparatus for automatically soldering flexible jewelry chains to certain parts such as locks or ornamental members wherein the parts to be soldered to the chain are retained by a retaining device and the chain is disposed on a carrier which is movable toward and away from the retaining device a distance corresponding to the desired length of the chain section to be soldered to the part, the carrier having a gripper for engaging a particular chain link, a chain position sensor arranged next to the gripper so as to sense the position of the link next to the link to be soldered, a control device associated with the position sensor and adapted to correct the carrier position until the correct chain link position is obtained, a cutting mechanism arranged adjacent the gripper for cutting the chain link held by the gripper, and soldering means arranged adjacent the part retaining device for soldering the cut chain link upon movement thereof in abutment with the part to which it is to be soldered.

Abstract: A steel with good weldability and hardenability, a yield point of at least 600 MPa, a rupture limit of at least 900 MPa at room temperature and an impact toughness of at least 40 Joule at -20.degree. C., has the following chemical composition as % by weight:C: 0.03-0.07Si: 0.10-1Mn: 1.2-2.5Cr: 1.8-3Ni: 1.5-3Mo: max 0.5Nb, V, Ti total 0-0.10with the remainder mainly only iron and impurities in normal amounts. The best impact toughness in achieved when the ratio Mn/Cr is about 2/3 or 0.6. The total content of Mn+Cr is, in accordance with a preferred embodiment, between 3 and 5, suitably between 3.5 and 4.5%. The steel is particularly suitable for anchor chains for e.g. off-shore oil drilling platforms. A recommended heat treatment after welding includes normalizing at 800.degree.-1000.degree. C., cooling to room temperature and duplex annealing.

Abstract: A stud arrangement on casehardened studded chains for motor vehicles, wherein the studs consist of a steel body which is permanently welded to a chain link and provided with a centrally disposed hard metal pin. The hard metal pin is inserted into the steel body such that it is covered on all sides by steel material of a thickness which at least corresponds to the casehardening penetration depth. In a method for producing such studded chains, an inwardly converging blind hole is cut out from one end of the steel body. The hard metal pin, of a shape corresponding to the conical hole, is forced into the hole, the pin being shorter than the blind hole so that a skirt is formed outside the pin. The edge of the skirt is beveled, and the steel body with the metal pin therein is joined to the chain by resistance welding in a machine for welding studs onto chain links, the body with the pin being moved gradually toward the chain link as the beveled edge melts and flows radially outwards.

Abstract: The present invention relates to an anti-skid device for improving the traction of a wheel on an automotive vehicle on the ground. The invention relates also to a method of producing such anti-skid devices. The anti-skid device comprises at least one chain intended to run along the wall(s) of the tire and a plurality of chains intended to surround the entire tread face of the tire. The various chains are interconnected. The interconnection is provided by welding a certain number of neighboring links of two adjacent chain lengths together. The chain length may preferably be equipped with additional gripping elements welded on at least some of the links.

Abstract: A machine for constructing a chain of metallic shaped links from a continuous wire including:means for shaping the wire in the form of a cylindrical wire spiral; means for gripping the first free turn of the spiral; means for cutting away the first spiral turn and associated with shaping means to urge the ends of the first turn to approach to one another, to form a chain link; shaping means to impart the desired configuration to the chain link; welding means to weld the ends of the chain link; and control means to move into the operative or inoperative positions and to make operative or inoperative in a predetermined time sequence and at desired times the various means composing the machine.

Abstract: Apparatus for the successive welding of C-shaped, pre-bent interlinked chain links forming a chain. The apparatus comprises a saddle for supporting a chain link to be welded, the saddle having a trough and cup-shaped recesses at each end of the trough for accommodating the link. Guides are provided on either side of the saddle for guiding the chain links entering and leaving the saddle and clinchers are also provided for gripping the chain link during welding and following completion of the welding operation. The guide for the chain links entering the saddle is provided with a chain sprocket having crossed slots, and is pivotable about its axis to permit rotation of the link in the saddle after welding has been completed. The clinchers have claw-like recesses in their end for gripping the rounded portions of the chain link to be welded and the clincher adjacent the guide for the chain link entering the saddle has a trough-shaped recess for guiding the following link.

Abstract: A chain welding machine has a first cam-operated linkage for rapidly moving psetting dies into and away from the ends of a link to be welded and a second hydromechanical linkage for applying upsetting force to the ends of the link. The upsetting force is controlled by hydraulic pressure which is regulated as a function of time by a cam-controlled pressure-limiting valve.

Abstract: A device for positioning the individual links of a length of chain having nks to be welded is disclosed. The device is used in connection with a chain welding machine wherein a length of chain is advanced step-by-step upwardly over a vertex defined by a saddle at which a welding station is located and then downwardly. The saddle is advantageously formed of a generally cylindrical, horizontally extending bolt affixed to the machine and which has a flattened top portion to which each chain link to be welded is advanced then erected for welding. Alternate links arrive at the flattened top of the bolt with the planes of successive links arranged at inclinations of 45.degree. to either side of a vertical plane containing the axis of the length of chain under the influence of the shape of the saddle and gravity.

Abstract: This disclosure relates to a chain welding machine for the electric resisce pressure butt welding of a length of chain having interlinked chain links pre-bent into a C-shape. The machine comprises a pair of oppositely movable upsetting tools for engaging the opposite rounded ends of a chain link to be welded. A drive train is provided for each upsetting tool and one of the drive trains includes as an element thereof a single acting hydraulic cylinder. A hydraulic system for activating the cylinder includes a hydraulic pump connected via a feed line with the cylinder through a control valve, pressure regulating valve and check valve. The check valve is arranged to block flow of hydraulic fluid from the cylinder during a portion of the upsetting stroke of the machine and is unblocked by the control valve after termination of a welding cycle.

Abstract: For the successive welding of the joints of consecutive links forming a link chain, the chain is advanced in a chain welding machine to bring a link to be welded directly below a welding position; the two links flanking the link to be welded are aligned in a common plane of alignment while a tensioning force is applied to the chain parallel to the direction of chain advance. Thereafter, the link to be welded is raised into a welding position in a plane disposed at 90.degree. to the plane of alignment. Subsequently, the link is immobilized in the welding position and its joint is welded. Upon completion of the welding step, the just-welded link is lowered from the welding position.

Abstract: A heavy-duty chain link which constitutes a chain for use with vessels and the like. The link is fitted with a stud across the center thereof, which tends to prevent stretching and kinking of the link. Heat sources such as electron beams and plasma arcs fusion weld the abutting of two ends of the link, and the stud is wedged at at least one of its ends to said link by means of roots of weld beads provided by the heat sources. Such wedges lie at a right angle with the axis of the link for most effectively preventing the stretching and kinking of the link when it is subjected to a heavy load. A method of making this kind of stud chain link is disclosed also.

Abstract: A chain welding machine for the electrical resistance butt-welding of subntially C-shaped chain links is disclosed wherein two pair of electrodes are arranged symmetrically in relation to a median plane of the machine frame. Each pair of electrodes is supported on a pair of double-armed levers arranged for opposite rotation about a horizontal axis. Each electrode pair is adapted to grip, in plier-like fashion, one of the two ends of the chain link to be welded. Each lever pair is rotatably mounted to a trunnion which is, in turn, resiliently mounted in a bushing in the machine frame for absorbing any radial and/or axial loads imposed on the electrodes by misaligned or oversized chain links to be welded.

Abstract: For the successive welding of the joints of consecutive links forming a link chain, the chain is advanced in a chain welding machine to bring a link to be welded directly below a welding position; the two links flanking the link to be welded are aligned in a common plane of alignment while a tensioning force is applied to the chain parallel to the direction of chain advance. Thereafter, the link to be welded is raised into a welding position in a plane disposed at 90.degree. to the plane of alignment. Subsequently, the link is immobilized in the welding position and its joint is welded. Upon completion of the welding step, the just-welded link is lowered from the welding position.

Abstract: An automated system for producing chain wherein individual pins are fed one-at-a-time to a heating station. The pins are heated in stages at said station to a temperature suitable for bending of the pins. The pins are automatically moved from said station by transfer and conveyor means to a bender where the pins are clamped in place and then bent in stages into an open-ended link shape. A robot picks up the link-shaped pins and places the pins one-at-a-time on the supporting surface of a closer. The robot then interlinks a welded link with a pin on the closer, and the pin on th closer is then closed. The robot then moves the closed pin to the welder for welding of the ends.

Abstract: A roller chain including a series of inner links each formed by a plurality of parallel inner link plates connected by a pair of hollow bushes. The inner links are connected by a series of outer links. Each outer link comprises a pair of parallel outer link plates connected adjacent the opposite ends thereof by a pair of pins. The pins on a given outer link extend through the bushes on the adjacent ends of two inner links to pivotally connect same together. The inner link plates and the associated bushes forming the inner links are fused together by a fillerless weld formed by electron beam or laser welding. The pins and the outer link plates can be similarly welded together. The resulting chain has substantially increased tensile and fatigue strength.

Abstract: For welding, in the course of a single pass, a link chain of indeterminate length formed of C-shaped, serially interconnected, alternating first and second links, the chain is guided, in a welding machine, through a first welding position, in the zone of which the first links have an edgewise upright orientation and the second links have a flat-lying orientation. In the first welding position the first links are welded. Then the partially welded chain is guided to and through a second welding position in such a manner that in the zone of the second welding position, the second links have an edgewise upright orientation and the first links have a flat-lying orientation. In the second welding position the welding of the chain is completed by welding the second links. Subsequent to the welding of each first or second link, the just-welded link is advanced for bringing the successive first or second link into the first or second welding position, respectively.

Abstract: Method of and apparatus for electrically butt-welding high-strength chains. Previously bent and interengaged chain links are passed through a chain welding machine, each chain link in succession being alternately rotated about its axis and erected to a vertical position for engagement by upsetting members and welding electrodes.