Abstract: A connecting head for scaffold systems, with the connecting head including a connecting zone having centering lobes and an annular contact surface as well as a conical surface arranged so as to provide for favorable welding conditions.

Abstract: A scaffolding guard rail post having hooks connected thereto for securing guard rails to the post. The post comprises a longitudinal rod and each hook comprises a longitudinal leg portion connected to the rod and an arm portion. The arm portion has a lower arcuate portion, an upper arcuate portion, a longitudinal web portion intermediate to the lower arcuate portion and the upper arcuate portion, and a longitudinal lip portion. A corner guard rail post has a pair of upper hooks connected thereto and a pair of lower hooks connected thereto. The guard rail posts are secured to a scaffolding frame during usage thereof.

Abstract: A connector for assembling components of scaffolding is disclosed comprising a barrel having an opposite end having a longitudinally extending slot. A pivot pin and an abutment pin extends across the slot and mounted at the opposite end of the barrel. A free hanging latch has an offset aperture for pivotally mounting onto the pivot pin and a channel for receiving the abutment pin. One end of the channel is configured to abut with the abutment pin when the latch is in a locked position and the other end of the channel being configured to abut the abutment pin when the latch is in an unlocked position. The latch has a tab which is offset beyond the end of the barrel whereby pressing on the tab, the latch pivots from the locked position to the unlocked position allowing egress of the brace from the connector.

Abstract: An automatic tool-exchanging device can be set on a robot for exchanging tools. It mainly comprises an upper and lower assemblies, and an engaging mechanism. The engaging mechanism includes a cam, which is to be driven with a double-acting pneumatic cylinder assembly. When the double-acting pneumatic cylinder is turned on, the upper and lower assemblies will be engaged together and generate a self-lock effect for safety; when the double-acting pneumatic cylinder is turned off, the two assemblies will be disengaged from each other.

Abstract: An improved scaffold connection is provided, comprising a first ring member having an upper side and a lower side, fixedly attachable to a vertical scaffold member; a connector body having a first end, a second end, a top, a bottom and sides, fixedly attachable at its second end to one end of a horizontal scaffold member having an upper surface, the connector body including a section for attachment of the connector body to the upper side of the first ring member, extending from the first end of the connector body; a cavity, extending through the body and opening exterior of the body at a first opening in the first end and a second opening in the second end; and a support element fixedly positioned in the cavity, the support element having a curved support surface; and a latch member, positioned in the cavity and having a first end extending through the first opening, the latch member being pivotal within the cavity and having a curved base section, matingly slidable on and supported by the support surface.

Abstract: A scaffolding guard rail post having hooks connected thereto for securing guard rails to the post. The post comprises a longitudinal rod and each hook comprises a longitudinal leg portion connected to the rod and an arm portion. The arm portion has a lower arcuate portion, an upper arcuate portion, a longitudinal web portion intermediate to the lower arcuate portion and the upper arcuate portion, and a longitudinal lip portion. A corner guard rail post has a pair of upper hooks connected thereto and a pair of lower hooks connected thereto. The guard rail posts are secured to a scaffolding frame during usage thereof.

Abstract: A scaffolding arrangement including a perforated disk having a central bore for accommodating an upright scaffolding element. The perforated conencting disk includes a plurality of alternately arranged large and small wedge accommodating holes, with the small wedge accommodating holes having a wedge contact surface forming a continuous curve which is symmetrical with respect to a radius which passes through a middle of the wedge contact surface of the respective small wedge holes.

Abstract: The scaffold fitting, which is for securing a scaffold tube to a steel plate or beam comprises a body (10) having a concave arcuate surface (20), a pivotal jaw (12) having a concave arcuate surface (18) arranged to face the arcuate surface (20). The jaw is pivotally mounted adjacent one end to the body and is provided with a clamping bolt (24) at the other end, the bolt being arranged to draw the jaw to the body to permit a scaffold tube to be gripped between said facing arcuate surfaces. A channel member (16) is secured to or integral with the obverse of the body, the channel member having opposed sidewalls arranged substantially perpendicular to the axis of the scaffold tube, the free ends of these sidewalls being remote from the body and having clamping bolts (38, 40) for clampingly engaging the steel plate or beam to one of the sidewalls.

Abstract: An improved scaffold connection is provided, comprising a first ring member having an upper side and a lower side, fixedly attachable to a vertical scaffold member; a connector body having a first end, a second end, a top, a bottom and sides, fixedly attachable at its second end to one end of a horizontal scaffold member having an upper surface, the connector body including a portion for attachment of the connector body to the upper side of the first ring member, the portion extending from the first end of the connector body; a cavity, extending through the body and opening exterior of the body at a first opening in the first end; and a latch member, positioned in the cavity and having a first end extending through the first opening, the latch member being pivotal within the cavity such that the first end is positionable below the lower side of the first ring member.

Abstract: Disclosed herein is a support system for use in forming a temporary scaffolding such as a prefabricated scaffolding, a temporary system such as a panel support, or a structure such as a truss-type pillar, tower, etc. The support system comprises columnar members each provided with a plurality of flanges along the longitudinal direction thereof, connecting members each provided with joint shoes at both ends thereof, and wedges each driven into the joint shoe, the flanges each comprising a supporting piece along the circumferential direction thereof, the joint shoes each comprising a hollow housing having a pair of opposed wall bodies, and a hook loosely fitted movably in the housing, the wall bodies and the hook being provided with respective wedge insertion holes opposed to each other, and the hook being provided at an end portion thereof with a catch portion to be engaged with the supporting piece of the flange.

Abstract: In a square array with a modulus (M), the plug-in building blocks of the building set have protruding connecting pins (1) and corresponding mating connecting sockets. In order that bendproof trusses can also be built, the building set has single-row connecting bars (34) with two terminal pins (35), whose spacing from one another amounts to .sqroot.2 times an integral multiple of the modulus (M), and girder elements (10), which at two bordering sides faces (13, 14) each have a single row of pins with modular spacing and parallel to these side faces each have a projection (19) set back by the thickness of the connecting bar (34). In this way, stable, aesthetically appealing trussings can be built with the building set.

Abstract: A span member for supporting scaffolding platforms in scaffolding using support posts that have perforated disks for mounting connecting heads. The span member includes a light-metal U-shaped beam with supporting edge webs on vertical legs thereof. The connecting head, shaped in many areas in a space saving manner and with a disk slot, includes welding flaps which abut inner surfaces of the vertical legs and are fastened thereto with a welded seam at the top.

Abstract: A peripheral support frame is provided over which to receive and for supporting a flexible canopy or tent cover. The frame includes a plurality of horizontally elongated peripheral frame members with peripherally adjacent frame members including a pair of adjacent ends and an upstanding leg assembly is disposed between and provided for support of each pair of adjacent frame member ends. Each leg assembly includes an upper head from which the adjacent peripheral frame member ends are removably supported against angular displacement relative to the associated leg assembly about axes extending longitudinally of the peripheral frame members with only a single shank-type fastener being secured between each peripheral frame member end and the associated leg assembly subject only to tensional forces.

Abstract: The system includes vertical posts with apertured disks secured thereto at intervals, coupling heads, wedge-like keys, scaffold pipes, coupling head extensions, and tank-link heads. Each coupling head has a horizontal slot receiving an apertured disk when the head is pushed into mounted position thereon, and has top and bottom key-receiving openings above and below such slot. A wedge-like key extends down through the top key-receiving opening, through a disk aperture, then through the bottom key-receiving opening, fastening the coupling head to the disk. Coupling heads for horizontal scaffold pipes have extensions insertable into the pipes. Diagonal scaffold pipes have tang-link heads, whose tank has an aperture for a pivot provided on an associated coupling head. Conventionally, the disks, coupling heads and pipes are all made of steel, the disks of 9 mm thickness and 122 mm diameter. The disclosed lighter-weight version employs disks and scaffold pipes made not of steel, but of light metal such as aluminum.

Abstract: A circular plate with a plurality of apertures therein surrounds a vertical upright member used in constructing a scaffolding. An end of either a horizontal or diagonal spacer member is joined to the upright by a tapered wedge which is passed through the aperture. A wedge support member is secured to the end of the spacer and comprises a pair of parallel legs which straddle the plate. Each of the legs has a slot therein to allow passage of the wedge. A U-shaped tooth depends from the upper leg and is shaped to conform to the perimeter of the aperture in the plate. Both the tooth and the aperture are tapered so that as the wedge is driven into the aperture, the tooth is forced into engagement with the perimeter of the aperture. Engagement between the tooth and the aperture prevents lateral movement of the spacer relative to the upright.

Abstract: Mechanism for adjustably moving two separate series of water fountain nozzles. The mechanism includes a pair of elongated push rods being driven in opposite directions by a single electric motor having two eccentric arms. The push rods are each separately connected to a spaced series of fountain nozzle assemblies by a slip ring adjustably connected to an elongated length of pipe forming part of each nozzle assembly. By varying the location of the slip ring along the length of the nozzle assembly's pipe, infinite variations in the extent of the arc through which the nozzle's tip will sweep during oscillation of the push bars is achieved.

Abstract: A scaffolding comprises uprights (6), cross members (8) with connection members (12) by which the cross members may be connected to the upright members, and diagonal braces (10) with mounting formations (42) adapted to be interfitted with receiving formations (32, 34) of the connection members (12). The mounting formation (42) is generally cylindrical, and its longitudinal axis intersects the longitudinal axis of the brace substantially at right angles, generally centrally of the mounting formation. The mounting formation is carried by a cranked connection portion (44). The receiving formations (32, 34) are provided by transverse bores (36), with lateral recesses in which the connection portions (44) are located when the mounting formations (42) are positioned in the bores (36). This allows forces to be transmitted between the connection member (12) and the diagonal brace substantially on the longitudinal axis of the brace, over a range of angular articulation of the brace relative to the cross member.

Abstract: A connector for scaffolding or similar structure permitting vertical poles to be connected to longitudinal transverse members or bars includes a star-shaped portion with a central bore having a plurality of arms which at their ends each carry a pyramid-conical opening into which engages a pyramid-conical or conical hook. A clip which is movable about a horizontal axis makes it possible to avoid accidental dismantling of the assembly.

Abstract: The supporting device comprises a support column (1), on which a jib-wedge connecting device (2) can be attached in longitudinally displaceable manner and can be locked at any location of its longitudinal extension. The connecting device (2) with a clamping chuck (3), consisting of a supporting wall (3.1), receiving the jib arm (7), a tightening wedge cage (5) and a clamping plate (3.2) which connects these two components, grips around the support column (1) in the manner of a C-shaped engagement element. Frictional engagement is made between the connecting device (2) and the support column (1) by a tightening wedge (4) which is guided in longitudinally displaceable manner in the tightening wedge cage (5).The clamping chuck (3) is provided with a lateral passage opening (9), through which the clamping chuck, by being placed laterally onto the support column (1), can be engaged with and disengaged from the latter.

Abstract: A tractor has a typical three-point hitch with lower lift arms and an upper stabilizing arm comprising, in part, of a transverse horizontal rod extending between the lift arms. A pair of connecting structures are mounted on the implement and spaced on the order of the lift arms but being transversely offset therefrom. Each of the connecting structures includes a vertical plate having a U-shaped edge opening vertically for receiving the transverse bar. A link is mounted on the fore-and-aft plate and extends from one position in which it traverses the opening of the U so as to retain the bar in the nip area of the U-shaped edge and a position in which it extends vertically and opens up the U-shaped edge so that the bar may have ingress and egress from the nip area. A latching rod extends from the plate and there is provided an opening in the link that receives the latching rod.

Abstract: An arm piece is put on the tip of a spacer projecting out through an outer wall of a frame board in such a way that the arm piece is fixed perpendicularly to the frame board positioned between the spacer flange and the arm piece. The arm piece, at its back end, is provided with a bearing section projecting upward. The bearing section is provided with a support piece capable of rotating toward and away from the frame board. The support piece is provided with a supporting section to catch a long reinforcing material for the frame board. The long reinforcing material is put into the supporting section and then the support piece is rotated toward the frame board. Thus, the long reinforcing material gets held between the supporting section and the outer wall of the frame board and the load exerted in the direction from the frame board is supported by the bearing section via the support piece.

Abstract: Ladder frames for shoring structures are assembled into towers using cross-braces clamped to the columns of the frames. The towers several tiers high are braced one to another by secondary braces, also clamped to the columns of the frames. Disclosed is a connector that permits two secondary braces to be joined to the column at a single location. The connector is such that one secondary brace is set to lie horizontally, whereas the other may lie diagonally. The connector includes bands which may be clamped and tightened onto the columns and braces, and the tightening means is not detachable from the connector; clamping wedges and bolts are provided which are all captive.

Abstract: Improved apparatus is provided for temporarily securing together scaffolding members. A slotted stud fixed to a scaffolding support member is provided with a pivotal dog rotatable within the slot for receiving the hole punched end of a cross member. A spring and washer having a transverse bar member within the slot are permanently retained on the stud to prevent misuse of the device. Rotation of the dog to receive the cross member causes axial movement to the washer and compression of the spring. Further compression of the spring by the cross member allows the dog to return to its lock position by gravity. The spring, washer, and dog thus cooperate to either expel the cross member from the device or lock the cross member in place, which substantially increases scaffolding safety.

Abstract: A cycle accessory, for example a double lever 2, 3 for controlling a derailleur, is carried by a support 4 defining a fixing tab 11 received and wedged in a cavity of complementary shape which may be defined by a part 1 of the frame and a bridge member 14 brazed on the frame. The arrangement is such that, when a force is exerted on the accessory in the course of use, this force tends to increase the wedging between the fixing tab 11 and the cavity. Applicable to any accessory for a cycle.

Abstract: A releasably engageable builders scaffolding assembly comprises an upright member, cross members and brace members wherein a cross member and a brace member are connected to the upright member by means of a wedge securing both said members to a socket on the upright member. A cross member is connected to the upright member by means of a channel shaped connector straddling a socket and affording a space therebetween for the reception of a grooved spigot extending from a brace member which spigot is retainable by the wedge passing through the cross member connector and a socket.

Abstract: In a scaffolding system in which vertical metal scaffold pipes are connected to non-vertical metal scaffold pipes by disc-shaped bridged connecting flanges, each non-vertical scaffold pipe has a wedge-shaped end portion terminated with edges which are curved at the end face of the pipe inwardly of the pipe and form together a smooth supporting surface supported against the outer wall of the adjacent vertical scaffold pipe. Each non-vertical scaffold pipe is provided with a slot in which the disc-shaped connecting flange is engaged in the assembled scaffolding.

Abstract: Dismountable multi-purpose framework (for example for use in forming access towers or platforms) is provided using a set of elongate members, preferably metal angle; including pillar members 10 and linking members e.g. horizontal members 11 interconnected by engaging a tenon formation 12 at one end of a first pillar member with a socket formation 16 of a second pillar member so that they are aligned in end to end relationship. The linking members have apertured lugs 21 which engage the tenon formation between the pillar members and the assembly is secured by a U bolt 17 which engages the tenon formation and is tightened by a wedge 19.

Abstract: An anchoring device in the form of a connection (10) has an axial bore (12) formed by two semi-circular elements (14,16) having four sills (26) which form right angle projections. Bores (30) are formed in the sills (26) for receiving bolts (36) having transverse pins (34) in a pivotal relationship. The sills (26) have inclined surfaces (38) which in use form a seat for the nut of the bolt (36) and to orientate the bolt at an angle in the passage (30).

Abstract: A scaffold, which is comprised of a plurality of vertical posts and horizontal locking bars crossing those vertical posts, has a plurality of joints at which flanges are arranged to provide connections between the vertical posts and horizontal locking bars. Each flange is rigidly connected to the respective vertical post and has a peripheral portion surrounding the vertical post. This peripheral portion receives a hook of the pawl rigidly connected to the end of the respective horizontal bar and provided with a wedge to ensure engagement of the hook with the peripheral portion of the flange. The thickness of the peripheral portion gradually increases in the upward direction.

Abstract: A device for connecting a tubular horizontal member to a tubular upright in a scaffold for building, in which the horizontal member engages, by means of a fork, a tenon provided laterally on the upright, while a mutually parallel bolt and wedge extended through the fork and tenon to lock the fork on the tenon.

Abstract: The disclosure relates to scaffolding and includes the use of apertured locking discs adapted to cooperate with vertical supports, and horizontal or diagonal brace members. The ends of the brace members are provided with pivotable locking wedges which can be driven down through said ends and through the apertures in the locking discs. The apertures are all identically shaped and depending upon the intended purpose of the scaffold, certain surfaces of the ends of the brace members and the cooperating apertures are contacted by the locking wedges which thereby determines in which direction the horizontal members will extend.

Abstract: A hybrid scaffold assembly which employs a scaffold adaptor for transferring from a Tube Lox type of scaffolding to a stack-up type of scaffolding and vice versa.

Abstract: A scaffold joint for connecting the ends of horizontal scaffold members to vertical scaffold members. Spaced pairs of ring support members are fastened to the vertical scaffold members by welding or other suitable means. End connector assemblies are fastened to the ends of the horizontal scaffold members. Each of said end connector assemblies includes an end connector member and a locking assembly slidably mounted thereon. Each locking assembly is comprised of a wedge member and a wedge retainer member. The wedge retainer member is free floating relative to the wedge member and cooperates with a bolt to prevent inadvertent dislodgement of the assembly. Each end connector member has a pair of ring engaging portions adapted for engagement with the spaced ring support members on said vertical scaffold members.

Abstract: A ledger system for scaffolding which comprises a tubular ledger member having an end plate at one or both ends and being provided at one or both ends with a first slot extending from the end plate parallel with the axis of the tubular ledger member and a second slot also extending from the end plate parallel with the axis of the tubular ledger member and located 180.degree. round the circumference of the tubular ledger member from the first slot, the second slot having an enlarged inner end; and a wedge member for each pair of slots being arranged to pass through the first and second slots but being prevented from being removed from the first slot by first and second retaining means located adjacent the broader and narrower ends respectively of the wedge, the width of the enlarged inner end of the second slot being such as to permit the narrower end of the wedge with the second retaining means to pass freely therethrough.

Abstract: A scaffold connector assembly for connecting upright members to cross members to form a scaffolding structure. The scaffold connector assembly is adapted to connect upright members with cross members so as to form both orthorhombic and monoclinic substructures. The scaffold connector assembly is further adapted to interconnect both the orthorhombic and monoclinic substructures so as to form closed polygon scaffolding structures.

Abstract: A mechanism for removably securing forks to a forklift truck and the like includes a hook shaped upper end for engaging a support shaft mounted on the forklift truck and a freely pivotal release mechanism attached to the shank of the fork having a first surface closely adjacent to the shaft on which the fork is mounted. The pivoting release mechanism precludes disengagement of the hook from the supporting shaft when the fork is in operating position. Upon pivotal movement of the fork about this supporting shaft the pivotally mounted release mechanism pivots under the effect of gravity to present a second surface adjacent to the supporting shaft thereby permitting disengagement of the fork from the shaft.

Abstract: Means for assembling tubular scaffolding elements comprising an annulus (31) having radial arms (33) and being fixed on a vertical tubular element (32), a bracket or cap (34) engaged on a radial arm and locked by means of a key (35). Annulus (31) is shaped like a star and each radial arm (33) comprises a V-shaped radial clearance (36) and bosses (37,38,39), the sides of which are designed as steps to support the front end of the bracket or cap and are joined to the corresponding radial tubular element (42). The support steps are provided on the upper and lower sides (43,44) of each arm and are of a width and thickness to provide substantial seating to the end of the bracket and directional stability to the radial tubular element both in a vertical and a horizontal plane during the assembly keying operation.

Abstract: A connector for use in builder's scaffolding systems for connecting crossmembers to upright members where the upright members have sockets provided thereon and each of the sockets has an internal clamping face. The connector is coupled to one end of the crossmember. It has an upper and a lower limb spaced apart for receiving the socket therebetween. A generally trapezoidal opening having four sides, two of which are non-parallel, is provided in the two limbs. In engaging the connector, two of the four sides form first and second clamping sides. A wedge coupling member is received within the trapezoidal opening and mounted for clamping engagement with the internal clamping face of the socket and selected portions of the first and second clamping sides. The trapezoidal opening permits connection of the crossmember at a plurality of angles to the upright within the range permitted by the first and second clamping sides.

Abstract: The invention relates to tubular-type scaffoldings, to a method for assembling them and to the horizontal transoms incorporated therein. A scaffolding according to the invention comprises vertical elements bearing sockets on each of which may be fixed one end of a horizontal transom bearing a fork and a conical pin prisoner therein. Near its end, the pin comprises a protruding pivot. At rest, the pin occupies a substantially horizontal position and the upper edge of the socket abuts slightly to the rear of the pivot and causes the pin to pivot to vertical position. One application of the invention is the erection of scaffoldings for the construction of buildings, ships or reservoirs.

Abstract: The invention relates to a shoring system which comprises tubular end frame members and at least horizontal connecting members supported by gusset members which are detachably connected to the horizontal as well as to the upright members.

Abstract: The present invention relates to equipment for straightening deformed vehicles or vehicle parts and includes a frame of beams on which the vehicle is fastened. One or more straightening devices can be fastened to the frame. The equipment has a U-shaped cross-section by being built-up from an upper and a lower plate and an intermediate plate, that joins them at some distance from their ends. This permits the fastening device to be brought into contact with the upper, lower and outer sides of a frame beam. Further the fastening device is provided with a blocking element which can be made to grip around the lower, inner corner of the beam and to be in contact with a lower part of the inner side of the beam and thereby lock the fastening device to the beam.

Abstract: In post and runner type scaffolding, a uniquely formed integral connector is created from the end of the runner or other similar cross-member. The integral connector secures to a scaffolding post bracket (preferably in the form of a ring flange concentrically affixed to said post and having a circular array of identical cutouts) and abuts forcefully against the convex surface of said post by means of a wedge acting through one of said cutouts. The connector has a longitudinally extending cross-slot in its end of a width and depth to accommodate the bracket therein, dividing the connector end into upper and lower limbs. The free end of each limb terminates with the tubular walls thereof reformed from the tubular shape of said cross-member to a shape (preferably more flattened) effective to strengthen and stiffen said limbs for their intended use of supporting scaffolding loads and connection stresses.

Abstract: A brace lock on a scaffold for releasably engaging a perforated end of a brace. The lock comprises a pin means with an end attached to the scaffold and a free end. The pin means has a thickness and contour which permits the perforated end of the brace to pass over the pin means. The pin means includes an offset so that when the end of the brace is positioned near the attached end of the pin means, the end of the brace will not slide to the free end of the pin means unless the end of the brace is raised upwardly over the offset. The lock also includes a latch means releasably securing the end of the brace when the end of the brace is positioned near the attached end of the retaining pin means.

Abstract: A fatigue-resistant terminal for tubing used in passive structures by which the tubing member of the structure may be bolted or otherwise fastened in face-to-face contact with another member of the structure. The connector terminal contact face on one side of the connector is formed in a plane containing the adjacent-side tangency plane of the tubing and is formed on its opposite side by a trough-like depression that progressively deepens and widens endwise of the connector and that bottoms in a flattened area adjoined on opposite sides by upright shoulders or flanges attendantly formed from the cross-sectionally remaining tubing material along the depression and flattened area.

Abstract: A support structure formed in one or more sections, the support structure having vertical legs which are extensible at upper and lower ends thereof and being able to support concrete building forms at two different levels utilizing horizontal saddle beams near the top thereof to support a building form at one level with the extensible upper legs supporting a second building form at a second level. The saddle beams each include a pair of vertically spaced support surfaces preferably in the form of a pair of outwardly extending flanges proximate the top and bottom of a central web extending outwardly from the beam to form opposed surfaces, flanges or ledges and a connector at either end of the saddle beams, for securing the saddle beams to the legs, each connector preferably connected to the saddle beam by a bracket supported by the spaced support surfaces and secured to the web of the saddle beam to abut the opposed flanges.

Abstract: A shoring system having base frames with legs preferably of extruded aluminum in oval cross-section (for optimal support with minimal use of materials) and optionally having three T-slots formed integrally therewith and extending the length thereof (for versatility in bracing), and preferably in combination with telescoping extension frames formed of extruded aluminum and adjustably inter-connected with respective uppermost base frames by U-pins fastened through dual locating holes spaced in pairs along each extension frame leg. The dual locating holes are formed in thickened walls on either side of a central hollow core in each extension frame leg (to accommodate retraction of a jack screw mounted on the leg).

Abstract: A scaffold joint for connectng the ends of horizontal scaffold members to vertical scaffold members. Spaced pairs of ring support members are fastened to the vertical scaffold members by welding or other suitable means. End connector assemblies are fastened to the ends of the horizontal scaffold members. Each of said end connector assemblies includes an end connector member and a locking member slidably mounted thereon. Each end connector member has a pair of ring engaging portions adapted for engagement with the spaced ring support members on said vertical scaffold members. The locking members are adapted when moved to their locked position to make tight wedging contact with a ring support member, thereby causing the ring engagement portions on the end connector members to be forced into tight engagement with the ring support members to thereby lock the horizontal scaffold members to the vertical scaffold members.

Abstract: A device for coupling together laterally directed scaffold elements (11) and uprights in a scaffold (12) or the like. Each coupling device (1) includes an engagement member (2) which is connected to the upright and is open upwards at least in the position of use. Said member is provided with a wall (6) which extends with spacing from the upright and which delimits a space (4) situated between the upright and the wall. A hook-shaped member (9) is situated at least at one end of said scaffold element (11) and is adapted to hook into the engagement member. A first clamping member (14) is movable in relation to the scaffold member and is adapted to bear against the upright and the engagement member. A second clamping member (22/31) is adapted, in a locking position to be forcibly gripped between the first clamping member and the scaffold element.

Abstract: A sign bracket for attaching a sign to a stand particularly useful for supporting two cross members to which a flexible sign is attached. The bracket includes a sleeve which slidably overfits a vertical stand member and includes a resilient latch which permits the sleeve to be located at various vertical positions on the stand. The sleeve is affixed to a pair of sign holding mechanisms forming a channel having an open end which receives a sign cross member and having a resilient latch member located at the channel open end which restrains the cross member within the channel.

Abstract: A wedge-and-bolt connector assembly for adjustably fixing a stud to a slotted thin-walled structure or the like, and especially for use in a scaffolding or shoring system to connect braces to vertical support elements or stanchions when the latter have outwardly opening T-slotted channels formed therein, which assembly includes a stud (advantageously having a T-shaped head adapted to be received in the channel) and a shank extending through the channel slot away from the head. The shank has a bearing surface thereon facing the stud head; and a tapered wedge is slidably mounted on the shank for engaging the bearing surface, thereby to urge the bolt head against the shoulders of the channel and firmly secure the stud to the support element. The wedge preferably has a longitudinal slot through which said T-bolt is loosely mounted. The free end of the stud may include an extension having a toggle thereon or other illustrated modifications for securing the brace to the stud shank.