Abstract: A suspension chain head for a mechanically assembled strand-oriented sling chain system has an annular suspension member for suspending the chain head, at least one forked member arranged for carrying an outlet member of the chain head, and a shackle which connects the forked member to the suspension member. The shackle has a first end portion by which it is hung to the suspension member, and a second end portion provided with a pin which connects the shackle to the forked member and is secured against nondestructive disengagement from the forked member. A locking pin is provided for securing the shackle pin to the forked member. The locking pin may be formed as a spring cotter engaged in a circular groove which is provided in the shackle.

Abstract: A replaceable centering piece in an attachment device for securing structural parts to a chain by means of a bolt and two flanges being clamped across the two arms of a chain link by said bolt, said replaceable centering piece having end walls which are in contact with the curved ends of two adjacent chain links which engage with the chain link carrying the attachment device.

Abstract: In a double-pronged chain-shortening claw a safety device for preventing inadvertent release of a chain link supported in a pocket formed between two prongs of the claw. The safety device comprising a locking tongue which can be moved from an inoperative into an operative position in which the tongue projects between the arms of the chain link situated in the pocket.

Abstract: An improved shortening hook for chains with closed elongated links is described. It comprises a slot for receiving a chain link one limb of which is supported by a transverse yoke at the base of the slot. To prevent the chain link from escaping inadvertently from the slot, a locking device fixed to the prong of the hook projects into the mouth part of the slot.

Abstract: A chain net with at least one nodal point formed by a horizontally arranged chain lock and at least three vertical links connected to each other by a C-shaped basic body of the chain lock, which is closed by a locking element, at least one end of which forms a stop for a horizontal link, the basic body being provided with further stops preventing the vertical links from moving into the area of the locking element.

Abstract: A shackle for chains, especially sling chains, which includes a shackle stirrup and a shackle bolt. In closed position of the shackle. The shackle bolt is located in aligned bores provided in the legs of the shackle stirrup and is held in the said stirrup by means of at least one securing member. At least one end section of the bolt extends between the legs of the shackle and has a cross section which is smaller than the cross section of the bores in the legs of the shackle stirrup.

Abstract: The invention relates to an eyed hook having a shackle engaged in its eye. The eye has a flattened neck to allow the shackle to be engaged, while the shackle has a slot bridged over by a securing bolt, the width of the slot being greater than the width of the material of the hook constituting the neck, but less than the width of the remainder of the material of the hook constituting the eye. The neck is located where the eye merges into the hook, the neck having a transverse bore to take a locking device which also acts as a bearing for a pivoted safety catch of conventional type.

Abstract: A tensioning device for a tire chain, which comprises a first link member adapted to receive a chain link, a second link member adapted to receive another chain link, and an intermediate member, e.g. in the form of a tubular member, which is connected to the first link member and is interposed between the first link member and the second link member. The second link member is movable relative to the intermediate member. A shaft member which is associated with the intermediate member is fixedly connected to the second link member while being movable relative to the first link member. Preloaded springs are associated with the intermediate member and continuously act upon the connecting member so as to urge the second link member in the direction toward the first link member.

Abstract: A coupling shackle for field/factory assembly of lengths of chain, rope, cables, or the like/or attachments thereto; said coupling shackle comprising a generally U-shaped unit comprising an overlay/underlay assembly of two or more relatively nested complemental-configured U-shaped members which are traversed and interconnected at their leg ends as by means of a bolt or pin or the like. Said members may be first stamped or otherwise cut out of sheet/plate stock and then bent into U-shaped configurations; the bowed intermediate portions thereof being subsequently U-shape sectionally formed. The open end leg portions at opposite sides of the unit are apertured and side-by-side mounted upon the structurally cooperating interconnecting bolt or pin.

Abstract: A coupling unit comprises in combination (A) a substantially U-shaped shackle having two opposing, apertured shanks and a removable spindle which extends through the shank apertures, and (B) an eye member, such as a hook, which has at least one flattened portion, whose smallest dimension is smaller than the distance between the shanks of the shackle for permitting the eye member to be coupled to the shackle.

Abstract: The link has a body provided with two arms, and an integral transverse brace connects the arms and is formed with an information-bearing shield as an indicator for load-factor and other information pertaining to the chain link.

Abstract: A hook of the so-called "grab hook" type for engaging a chain of the welded wire link type, which features improved chain link engagement means. The chain receiving throat of the hook is inclined relative to the load lift line of the hook, and the chain link which is centered in the hook is supported upon a flat saddle portion of the hook which extends beyond opposite sides thereof. The hook receives and carries the chain when under load so as to subject the engaged links of the chain to no severe stress increases.

Abstract: A master link of forged metal construction features a multiple hole sling chain attachment arrangement serving to minimize bending moment deformation/failure stresses in the master link under various branch chain connection configurations; and reduces the number of special attachment links required to attach the branch chain(s) to the master link.

Abstract: A tire chain with separable chain strands the end links of which are connectable at each separation point by use of two connecting elements which can be hooked into each other and which are each safely connected with an end link, wherein each connecting element has a body comprising at least one portion bounding an insertion slot which portion has a cross-section decreased at its free end at the expense of its width and wherein the width of the insertion slot is smaller than the height of each of those portions of the body which bound the insertion slot.

Abstract: A chain link, which is asymmetric about its longitudinal axis, one longitudinal side of the link being convex, the other being concave, or a plurality of such links alternating with common type links, is used for twisting the chain into predetermined synchronization with the pockets and teeth (whelps) of a chain sheave (cable lifter, wildcat), particularly as applied to a chain and a rope interconnected by a coupling link larger than a common link.

Abstract: A device for adjusting the length of a link chain comprising a shackle or yoke in which the space between the arms is relatively wide except for a narrow portion at the closed end of the shackle. A length of chain extends through the space between the arms and is capable of moving lengthwise when in the relatively wide portion of the space. The relatively narrow portion of the space is wide enough to receive a link of the chain but not wide enough to permit the chain to move in a lengthwise direction. A pivoted keeper is adapted to project into the relatively wide portion of the space to retain the chain in the narrow portion and thereby prevent it from moving lengthwise.

Abstract: An adjustable anchor employed within a triple-lift fork mast unit of a type wherein opposing ends of two lift chains are adjustably secured to a common base structure such as an intermediate upright unit, the anchor including a housing attached to the intermediate upright unit and defining a bore with a spherical taper formed about one end of the bore, an adjusting sleeve arranged within the bore and having a spherical shoulder for bearing engagement with the spherical taper, a portion of the sleeve being knurled to facilitate its rotation within the bore for adjusting its threaded engagement with a connector secured to one of the lift chains, the other chain also being adjustably secured to the housing.

Abstract: A pendant jewel chain is provided which includes a conventional link chain, a clasp means in the form of a spring ring and a connection member, including first and second parts, disposed between the spring ring and the outermost link of the jewel chain. The first part of the connection member is disposed adjacent the spring ring and is of large size so to permit attachment thereof to the spring ring. The second part is disposed adjacent to the chain and is of small enough size to be inserted into the outermost chain link. The two parts are rigidly connected to one another and the second part is freely deflectable so as enable insertion of a chain link therein.

Abstract: A self-releasing collar for safely restraining an animal on a tether, the collar including a neck-encircling flexible neck member with a first closed ring attached at one end and with one end of a breakable link attached to the other end of the neck member, this end of the neck member being extendable through the first closed ring, the tether being attachable to the other end of the breakable link so that the tether is released from the neck member if the tension in the breakable link exceeds a predetermined magnitude to rupture the link.

Abstract: Anchoring systems, of the type comprising an anchor chain and a wire rope, characterized by a connector between the chain and rope which makes it possible to haul in without stopping to disconnect the hauling line, without requiring preorientation of the connector relative to the combination wheel or wheels over which it passes, and with a smooth transition between chain and rope on the wheel. Advantageous embodiments make it possible for the anchor line, including wire rope, connector, and chain, to traverse a more than 90.degree. change in direction on a single combination wheel without overstressing any component, particularly the end of the wire rope located at the rope-to-chain connection.

Abstract: A chain type choker hook having an eye adjacent one end and a generally L-shaped slot adjacent the other end terminating in a cross-shaped opening for securing a chain end portion.

Abstract: The invention relates to a linking member for connecting a rope and a chain to provide a combined line, e.g. for use as a mooring line for semi-submersible drilling rigs. The linking member comprises a shell, an intermediate member pivotably mounted within the shell, and a rope attachment sleeve pivotably mounted in the intermediate member, the rope extending from the sleeve out of one end of the shell. Moreover, the shell is constructed at its other end with a loop or bar for engagement with the first link of the chain.

Abstract: The invention relates to a series of matched sets of parts for a chain system, each set including a chain link of round-section bar, a connecting member and a lockable retainer pin for retaining the link in engagement in a slot in the connecting member. The invention provides that in order to ensure that links and connecting members which are incompatible in strength cannot be joined together, the bar diameters of the chain links, the widths of the slots in the connecting members, the internal widths of the links and the diameters of the retaining pins are varied stepwise from size to size from one matched set to the next in the series.

Abstract: A pipe cutter including a wheeled carriage which mounts a torch and rolls circumferentially about a pipe so that the torch can progressively make a cut thereabout. The carriage may be held snugly to the pipe by a chain or rope and take-up mechanism, and be advanced about the pipe by a crank unit detachably mounted to the pipe.

Abstract: In a shackle the shackle arms are bored to receive a pin and the pin and the bore through which the pin first enters, are shaped so that a plate, initially convex toward the pin may be flattened over the end of the pin and anchor itself in recesses in the shackle to retain the pin.

Abstract: A connector element for securement of one chain member including a plurality of links to a second chain member also including a plurality of links is disclosed. The connector element includes a pin portion and opposed head portions at the ends which define with the pin a pair of spaced shoulders. One head is enlarged so that its shoulder engages with a link to prevent passage therethrough. The other head may be received through the link and receives a deformable member thereover to cooperate with its shoulder. The member is of a size to cooperate with the link and prevent passage of the connector element in the other direction.

Abstract: In a beam clamp having a pair of arms suspended from a lifting ring, the ring is formed of two parts -- a rod portion, and a plate portion with notched ends receiving corresponding ends of the rod portion and welded thereto. The rod portion, which has circular cross-section, is bent to form a circular arc and is inserted through holes in the arms. The plate portion, which has rectangular cross-section, follows a different curvature to render the ring self-centering when suspended from a chain, the ends of the plate portion being too large to enter the holes in the arms. The arms have replaceable jaws which are fixed to the arms by screws.

Abstract: A lift chain including an end connector for connecting an end link to the load-carrying member of a fork-lift truck or similar load-handling device. Each link of the chain comprises a plurality of juxtaposed parallel link plates and the end connector includes a clevis joining the end link with a head having a screwthreaded attachment stud. The clevis is pivotally connected to the end link and the head by means of two spaced connector pins disposed crosswise to permit the end link to swing omnidirectionally relative to the head.