Abstract: A support knuckle for a luminaire has a first body attached to the luminaire housing and a second body which can be attached to a mounting location. The first body has a recess with peripheral teeth and a passage to the housing interior. The second body has teeth which are matable with those on the first body at various angular positions. The two bodies are held together by a threaded fastener passing through an elastomeric sleeve.

Abstract: A multicurvature reinforcing body comprising a pair of abutting bowl shaped members is fitted within a tubular chord member in the area of a complex joint. Cylindrical surfaces of contact of the multicurvature reinforcing body are positioned so that the longitudinal axis of an intersecting bracing member attached to the chord member passes through both of the surfaces of contact. The use of a multicurvature rinforcing body constitutes an improvement over the commonly used stiffening rings in that direct translation of tensional and compression forces acting along a bracing member which intersects at an angle other than perpendicular to the chord member to a large surface of contact within the chord member is effected.

Abstract: The disclosure herein describes a joint consisting of three serially-interconnectable members each including a cut-away section; the volumes defined by the cut-away sections of the first and second are equal and L-shaped. These two members, once assembled, define a cut-away section, the volume of which is rectangular. The volume of the cut-away section of the third member which serves to interlock the three pieces together equals the sum of the said L-shaped volume and the rectangular volume. One application of the joint of the present invention is in furniture support structures such as tables, shelves or the like.

Abstract: An attachment device comprises a conical screw and a hook which fits thereto with a curved center portion having a slot extending in the length direction of the hook. A plate can be engaged in said slot so that an aperture in the plate located near the edge thereof partly reaches inside the hook, whereafter the screw can be inserted therein. The screw then engages the edge of the aperture and the concave portion of the hook. The hook itself is inserted through an aperture in a rail and is held against one of its sides, so that the plate is drawn perpendicularly against the opposite side of the rail.

Abstract: A drive shaft assembly including a pair of telescoping drive shaft parts one adapted to fit within the other having a tapered member on the one drive shaft part which extends outwardly therefrom and which is retractable against the force of a spring. An introducing funnel is provided on the other drive shaft part to guide insertion of the one drive shaft part and the two drive shaft parts are formed with a profile having a generally lemon-like shape with a pair of opposed radially extending beads. The one drive shaft part is formed within the areas between said beads with an axial cutout and a guide piece is provided on the other drive shaft part for guiding the one drive shaft part into engagement therewith, the guide piece having associated therewith an introducing inclination which is directed to extend opposite to the direction of rotation of the drive shaft assembly.

Abstract: A barrier system is disclosed in which uprights comprise columns, each surmounted by a head member including a slotted member affording a plurality of longitudinally extending slots opening onto an upper axial end face of the slotted member, and a cap which can be screwed down into engagement with said end face to close off the axial ends of the slots, the slots open onto the periphery of the slotted member via restricted throat portions, so that radial withdrawal of fitments of complementary form, for example provided on the ends of horizontal barrier rails, can be prevented.

Abstract: A safety cage including two end plates connected by straps extending therebetween is adapted to be placed over an assembled quick connect-disconnect coupling, and the end plates engage behind abutment surfaces on the coupling to prevent accidental separation of the coupling elements. The cage also carries a pair of spaced vertical bars that engage a shoulder on the operating sleeve of the coupling, and lock it against any axial movement. The coupling includes an abutment ring that prevents any forward shifting of the sleeve because of component wear, further eliminating the possibility of accidental separation.

Abstract: A force multiplying and locking arrangement is disclosed to lock, for example, a cutting tool to a spindle. It comprises main body arranged to be threadably mounted on a spindle, said main body having a pressure ring at its forward aspect mounted to accommodate movement longitudinally of the arrangement and to inhibit movement rotationally of the arrangement. A cavity is defined by said pressure ring and said main body and includes an inclined plane. The cavity has a plurality of spherical balls disposed therein. Said main body is peripherally threaded to accommodate the threadable mounting of a compression ring having, at its forward aspect, a conical inclined plane overlying the cavity and the first mentioned inclined plane. Rotation of the compression ring forces the spherical balls into the cavity engaging the inclined planes and the pressure ring and greatly multiplying the force for locking the device. Reverse rotation of the compression ring releases the locking force.

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: A connecting device for releasably securing an axle on a support plate comprising a bushing member rotatably receiving the axle, said bushing member being disposed in an aperture of a support plate, which aperture has an opening to the edge to form a narrow throat which has a dimension less than the diameter of the aperture. The bushing member has a cylindrical body with portions removed to form at least one flat surface and a retaining lever connected to the switching body in a relationship so that with the lever in a first position the body can be inserted through the narrow portion of the throat into the aperture and then rotate it to a second position locking the bushing member in the aperture.

Abstract: A fastener-free merchandising display stand, which is rigid when initially assembled, and which remains rigid during use, comprises interconnected perpendicular base panels which meet at a sheet metal upright. One of the panels is rigidly welded to the upright, while the other panel is connectable to the first panel and the upright by sliding it vertically downwardly into a pocket formed by a section of the post and a section of the first panel extending perpendicularly from the face thereof and having an oblique, flanged edge. The second panel has a flange with an oblique edge which fits into the pocket. The second panel is tightened against the upright as it slides downwardly by a wedging action, so that the weight of the second panel tends to cause the interconnection to remain tight even if a slight bending of sheet metal parts takes place as a result of abuse.

Abstract: A timer assembly is trapped against a motor and gear box assembly by a bracket. The bracket is U-shaped to cradle the timer assembly in the bracket. It includes ears with apertures therein that mate with apertures in ears extending from the motor assembly. Rivets extend through the apertures to connect the ears together.

Abstract: A circular coupling for interconnecting a shaft to a bearing is disclosed. The coupling comprises a coil having a plurality of turns adapted to surround the shaft, as positioned within the inner race of the bearing. The coil is axially compressed for displacing coil turns relative to one another to frictionally bind the shaft to the bearing inner race. Upon releasing the compression on the coil, the bearing shaft may be removed from the shaft.

Abstract: A mounting for a windshield wiper pivot shaft on a vehicle cowl panel includes a transmission having a housing defining a base surface and a tower projecting from the base surface, a bore through the tower for rotatably supporting the pivot shaft, a rectangular aperture in the cowl panel having a pivot edge, a circular aperture in the cowl panel overlapping the rectangular aperture, a lip on the housing at one end of the base surface, and protuberances on the housing on an imaginary circle having a radius corresponding to but slightly larger than the radius of the circular aperture. The transmission is mounted on the cowl panel by inserting the tower through the overlapped apertures, hooking the lip on the pivot edge, and pivoting the housing toward the cowl panel so that the protuberances engage the circular aperture in interference fit fashion to remove all clearance between the transmission and the cowl panel when the base surface abuts the cowl panel.

Abstract: An upholstery fixing device consists of a bracket having a holdfast suspended therefrom with bendable or flexible straps. In use the bracket is riveted to the back of a trim board, and the holdfast is pushed into an associated aperture of an inside panel of a car door. Then, the bendable straps can be yieldingly bent to automatically reduce any misalignment between a fixed bracket (and hence its holdfast) and an associated aperture of the inside panel of the car door, thus facilitating the fixing of the upholstery to the inside panel of the car door in exact registration.

Abstract: A bell-lock mechanical pipeline connector is provided wherein a seal of soft material is wedged into a sealing mode by collet wedge lock fingers which in turn are actuated by a wedging means which is functional upon shearing of a pin.

Abstract: A ridge rafter connector formed from a strip of sheet metal which encapsulates the sides of the rafter and is normally connected to the side and top of the ridge beam. The top flange of the connector is configured so that it provides a locator function for the rafter to be connected on the opposite side of the ridge beam.The connecting flange attached to the holding beam may be planar or bent to different angles for use at various locations and for different purposes.

Abstract: The jointed stand comprises two joint or swivel heads coupled to each other and two arms each extending from a related one of the joint heads and terminating in a respective ball-and-socket joint. Each ball-and-socket joint is operatively associated with a push or thrust rod which slidably extends through the related arm and cooperates with a related transmission or transfer member in the associated joint or swivel head. Each transfer or displacement member has two oppositely inclined surfaces on opposite sides thereof which are supported at an associated end of the related push rod and at the joint head, respectively, by means of roller bodies. A hinge pin extends through the transmission members with clearance. A tightening element coacts with the hinge pin in order to be able to cam the transmission members at the roller bodies, so as to be able to selectively positively lock in place the arms and ball-and-socket joints and, when desired, to quickly release such locking action.