Abstract: There is disclosed a socket retaining ring for use with power driven sockets to fasten the sockets to the plug of the drive tool. The retaining ring comprises a molded, one-piece elastomeric ring having an integral, diametric pin extending from one side substantially across the span of the ring. The retaining ring is used with sockets which have a pinned interconnection to the plug of the drive tool by inserting the flexible diametric pin of the ring into the retaining hole and seating the ring in the peripheral groove about the socket.

Abstract: A chain track junction link of the type having some characteristics of a conventional link is constructed as two complementary portions in order to effect opening and closing of a chain track. A union of the two portions of the link is effected by a connection member having ends of approximately prismatical shape, the member being I-shaped in section. In the two portions of the link are a plurality of grooves shaped in such a way that, when the two portions of the link are jointed, they form an approximately prismatic hole suitable for receiving the member which holds the two portions of the link firmly together. In order to increase the stability of the joint, a track shoe is screwed, using holes, to the head of the member.

Abstract: An improved manhole concrete blockout for forming sewer pipe openings in the cast-concrete wall of a manhole where a hole is dug in the ground and at least one vertical hollow form is positioned within the hole and spaced apart from the surface which defines the hole and concrete is poured between the surface defining the hole and the form for forming a manhole wall. A plurality of form sections are connected together so that their outer surfaces can be positioned to become a longitudinal extension of the outer surface of the form. A blockout member is connected to the outer surface of at least one of the sections for forming an opening in the manhole wall, the end adjacent to the section being shaped to engage and conform to the outer surface of the section and the other end being shaped to conform to and engage the corresponding portion of the surface defining the hole so that an opening in the shape of the blockout member will extend through the wall when it is formed.

Abstract: A strip-form connector for spaced metal parts such as aluminium plates or components of windows or doors, is devised so as to perform an insulating or non-cold-bridge as well as fastening function. Basically it is made up of a hollow elongate body of plastics material with a more rigid fastening strip which is driven into the body so as to enlarge it into gripping engagement with the metal parts.

Abstract: A connector interposed between spaced metal parts, for example cavitied or hollow doors or window frames, consisting of an elongated plastics core which can be slid lengthwise between the metal parts in assembly and has a longitudinal cavity for receiving a wedge strip to expand and fasten the core in position.

Abstract: A scraper-chain conveyor is composed of a series of channel sections arranged end-to-end with shaped components on one side defining a guide for a machine such as a plough. Each component has a tubular track or rail at its upper end and these rails are spaced apart to receive coupling devices. Each device has a cylindrical body matching the rail profile and located between adjacent rails. Spigots engage with clearance in these rails; one spigot being integral with the body and the other spigot being slidable within the body so as to retract or extend therefrom. A recess in the body receives a block which is detachably secured to the body to prevent the slidable spigot from retracting.

Abstract: Structural members, especially components of a modular building, are joined at longitudinally extending and abutting surfaces by a correspondingly elongate connector having a cross-shaped transverse section. Each such member surface is formed with a pair of intersecting saw-cut slots that extend lengthwise of the surface and have a V-shaped transverse section in which the apex of the V lies substantially at the surface and in which the legs of the V diverge inwardly into the member. The members are arranged with the apexes of their respective pairs of slots in mutually opposed registry to define a composite, transverse slot configuration that is the complement of the cross-shaped connector and the connector is inserted endwise into the slots with opposed pairs of connector legs interlocking with the opposed pairs of V-shaped slots, respectively, and is driven longitudinally into the joint.

Abstract: A safety flexure for articulated channel-type roadway posts wherein a resilient member interconnects the upper and lower portions of the post by means of connecting studs substantially complementary in size and shape with the channel portions thereof.

Abstract: The fastening fitting is used for detachable connection of two structural members, especially for detachable connection of two structural members butting together at right angles, for example a furniture side wall with a furniture top panel, a furniture floor, a furniture intermediate floor, and so on. This fitting comprises a holding element, which can be inserted into a hole of a first structural member, a pin which can be inserted into a hole in the second structural member and an anchoring screw which engages with an opening in the pin. The pin and the holding element are connected by a compressible section preferably by an elastically compressible section, which section can be compressed at least in direction of the anchoring screw. At a preferred embodiment the holding element, the pin and the compressible section are integrally made or formed as one unit.

Abstract: There is provided a coupling device for joining together reinforced concrete elements, such as concrete piles or pillars. The device comprises a plurality of first coupling means for locked arrangement on the mutually opposing faces of two segments to be joined together. Each of said first coupling means has means for receiving a second coupling means so that the first coupling means of the two opposing faces are held in mutually locked relationship by said second coupling means.

Abstract: A pile connecting device having a plurality of plate members each adapted to be secured to the end of a pile section and each having a recess extending inwardly from its periphery, frame means for operatively interconnecting said plate members, a further plurality of plate members each adapted to be secured to the end of a further pile section and each having a recess extending inwardly from its periphery, and a further frame means for operatively interconnecting said further plate members, each plate member prior to connection in with their recess registering, and a longitudinal pin substantially I-shaped in cross-section adapted to be inserted and retained in each pair of registering recesses, the underfaces of the heads of the pin bearing against the outer surfaces of the abutting plate members.