Abstract: A protective device is disclosed for use with a scaffolding platform of the type which is suspended from an upright structure by means of and movable along at least one cable. The protective device protects an exposed zone of the cable adjacent to the platform against damage. The device comprises a weighted sleeve and means for selectively opening and re-closing the weighted sleeve so that it may be placed around the cable at the exposed zone and thereby protect the same. The weighted sleeve follows said platform under the influence of gravity as the platform is moved along the cable.

Abstract: A ladder platform for step ladder, ladder or extension ladder. The platform has two tray positions which hinge relative to one another and are movable between a storage position and a work position. One tray portion has integral handles and is securable to stiles of the ladder. The platform, in the work position, can support tools or other items.

Abstract: An electrical deactivation circuit and a two piece overhead guard assembly including two separately movable bar members which extends upward and over the head of an operator located on the upper work platform of an aerial work platform. The guard bar members are connected to the frame of the upper work platform by a pair of movable support assemblies, the movement of which actuates impact detection induction type proximity switch means to interrupt electrical power applied to the electrical control circuits and stop the engine powering the aerial work platform. Each movable support assembly includes a pair of spring loaded mechanical subassemblies including a pair of clamp members between which is located an elongated coil spring whose stiffness is varied in accordance with the distance separation of the clamps. An inductive type proximity switch is located in the lower end portion of each spring to sense movement of the inner end of a respective guard bar member.

Abstract: A step ladder construction is provided comprising a plurality of steps extending between a pair of struts. Coupling means join each of the steps with the pair of struts. Each of the struts has the shape of a channel with a pair of spaced webs between which the steps are received. The coupling means includes at least one flange element formed on one of the strut and the step, at least one surface defined on the other of the strut and the step to abut the flange element and fastening means to fasten the step to the strut with the flange element against the surface. The fastening means constitutes means to maintain the flange element against the surface while the flange element constitutes means to transfer a substantial portion of loads appearing on the step to the strut to reduce the shear loads appearing on the fastening means.

Abstract: A gantry module which may be transported to a building site and simply placed on site to provide protection for pedestrians. Each gantry module is adapted to be secured to adjacent similar modules to provide a gantry assembly. In addition clamp means perform the dual function of securing adjacent modules and also securing a removable hand rail to the assembly. The modules are of generally rectangular form but may be of any desired shape and may include folding legs to enable transportation of a large number of modules.

Abstract: The present invention relates to an improved adjustable scaffolding assembly and is seen to include an adjustable scaffolding supporting device, a roller assembly, and a peak stabilizer bar assembly. The adjustable scaffolding supporting device is adapted to be slid along a ladder to permit positioning the scaffolding supporting device at a predetermined height and pitch with respect to the ladder. The roller assembly is mountable to the ladder and facilitates positioning the scaffolding assembly for use. The peak stabilizer bar assembly is also mountable to the ladder and is adapted to secure the scaffolding assembly while in position on a building roof.

Abstract: Stepping platforms, like storage platforms suspendable on a ladder, are known from the state of the art. However, these are not variable in use and in particular cannot simultaneously meet both functions. The invention provides, that a suspension link is supported on one end of a plate with a peripheral edge, while a mounting element is provided on the other end, which mounting element can include two mounting plates, which are supported pivotally on the outside of the plate and include a recess into which a ladder crosspiece is receivable. The inventive ladder platform can be used as an accessory for all types of ladders.

Abstract: A mounting structure for attachment of an electrical device on a vertical or obliquely angled vehicle surface. The surface is formed by a sheet material of predetermined thickness having a spaced pair of surfaces for defining bores therein. The mounting structure includes a mounting base plate adapted for attachment to an electrical device which is to be mounted to the surface. The base plate includes a plurality of mounting flange portions extending therefrom for mating with the surface. At least two of the plurality of mounting flange portions include transversely extending clip members spaced for engagement of the bores. Each of the clip members includes a first flange extending perpendicularly from the mounting flange portion. The first flange has portions formed therein defining a cutout portion. The cutout portion includes a ramp surface which leads to a terminal surface at a predetermined distance from the mounting flange.

Abstract: An apparatus is set forth wherein a plurality of spaced tubular supports include pivotally mounted angular feet at their lower terminal ends. The supports each telescopingly receive an inner support, wherein each inner support includes a "C" shaped rigid jaw for positioning about a rung of an associated ladder to provide support to the ladder. The parallel supports include spaced sleeves, wherein the sleeves include tab members, wherein each respective tab member pivotally mounts an elongate link. Each link is defined by an enclosed slot, wherein the slots overlap and include connector clamps to space the links and the supports relative to one another to provide an organization securely positioning and maintaining a ladder in a predetermined orientation.

Abstract: An improved method and apparatus of scaffolding during building has a scaffold with folding hanger and work frames, storable bumpers on the work frame for propping the scaffold off of a wall, and a hanger structure in the hanger frame for suspending the scaffold from the cap or upper header of a building wall. The scaffold is also usable as a sawhorse and a ground/floor supported scaffold. The method of scaffolding provides the steps of hanging the scaffold from the header or cap, propping the scaffold off with storable bumpers, and folding the scaffold flat for storage and transportation.

Abstract: A ladder, especially for use in manholes, where the rungs are mounted in double-walled sidepieces via respective sleeves. Each sleeve has a body wall that, to uniformly support introduced forces, extends through both walls of a sidepiece and, especially from the outside, is arrested by connections between the rung and sleeve on the one hand and the sleeve and sidepiece on the other hand. At the same time, an outwardly directed base of the sleeve protects not only the rung but also the outer wall of the sidepiece.

Abstract: A modular scaffolding system includes a plurality of interchangeable structural members, each having a circular cross section. Each member also has a plurality of holes drilled in its outer surface. The holes are located in a pattern that allows flexibility in connecting other structures to the circular member. A number of members are attached together to form a frame, and a scaffold is attached to the frame by appropriate means. The components of the modular scaffolding system may be formed into a variety of configurations, including roof-based and ground-based rolling scaffolds and a trolley-suspended scaffold which moves on a monorail. A moment-arm connecting joint and a pivoting composite connection are provided for connecting the components of the scaffolding system together so that scaffold exhibits a high degree of rigidity, while also providing adjustable angles between predetermined structural members.

Abstract: A sawhorse has a T-shaped beam with two brackets secured to the beam adjacent its opposite ends. Legs are pivotally mounted on the brackets to pivot between extended positions projecting downwardly and sloping outwardly to the side and to the end of the beam and retracted positions lying along the underside of the top plate of the beam. The brackets are U-shaped sheet metal brackets that have support flanges at the top ends of their arms. The base of the bracket and the support flanges are connected to the vertical web of the main beam, while the top plate of the beam is also fastened to the support flanges. Locking pins are carried by the brackets to lock the legs in their extended and retracted positions. The pins are preferably adjustable.

Abstract: A lifting carriage having a rectangular frame provided with four corner posts for guiding an elevating platform mounted between these posts. Each post has a toothed rack on which a toothed gear mounted on the platform is engaged for raising the platform. The toothed gears ar actuated by a motor mounted on the platform through a power chain. The carriage is mounted on wheels which can be actuated by a motor for horizontally moving the carriage. The carriage is also provided with spinning wheels on its side, whereby, the carriage, when tilted on its side, can be moved sideways. The elevating platform is provided with guiding wheels adapted to abut against the corner posts for allowing a smooth sliding of the elevating platform.

Abstract: A brace to reinforce the horizontal bearers of scaffolds is provided having a trough shaped rest mounted on a top edge of a planar bracket. The brace is held in place by support tubes extending upward from the scaffold posts. Clamps pivotally connected to each side of the bracket engage the ends of the support tubes.

Abstract: A ladder stabilizer comprising rigid wings attached to the rails, extending to the ground on each side to brace the ladder. The wings are attached by hinges to fold against the ladder front for storage. The design takes advantage of the angular relationship between the rails of a ladder and the ground, to automatically adjust to the optimum angle and position of support, making deployment trivial. The design distributes stress along each ladder rail, allowing installation on portable ladders of all constructions load ratings.Embodiments and enhancements are described which provide flexibility of use in obstructed situations, and enable user adaptability for all shapes and sizes of portable ladders.

Abstract: A device supports a mechanic above the engine compartment of an automotive vehicle and is movable in at least the vertical and in the horizontal planes. The device also includes a jackscrew lifting element so a user support can be moved vertically with respect to the rest of the device.

Abstract: A mounting bracket for curtains, which includes a first face of the bracket which would be positioned against the front face of a window molding; a mounting hook extending outwardly from the face of the bracket, for mounting a curtain rod thereupon; a first arm extending rearwardly from the top portion of the face, to a depth substantially the thickness of a window molding; a second arm extending along rearwardly from the side of the face also of a depth substantially the thickness of the window molding; a first downward depending tooth member extending downwardly from that arm extending rearwardly from the top portion of the bracket, and a second tooth member extending inwardly from that arm extending rearwardly from the side of the bracket, so that when the inwardly depending tooth is engaged into the side wall of the molding, and the downward depending tooth member is engaged into the upper wall of the molding, the bracket is secured onto the molding without the need for mounting screws or the like.

Abstract: A perimeter debris net lifting system employs a plurality of lifting units which support a debris net for a high rise-type construction structure. The lifting units comprise a pair of frame assemblies which are slidably coupled and essentially scale the structure to raise the debris net as construction progresses. Each of the frame assemblies are independently mountable to two floors of the structure. Each lifting unit is vertically displaced by disengaging one of the frame assemblies from its mounting engagement and lifting the frame assembly while the other frame assembly remains securely fixed to the structure. The debris net remains fully extended and functional during the vertical lifting process. The lifting units may also mount one or more scaffolding frames and a vertical debris net.

Abstract: An extendable, elevatable and rotatable boom carrying at its outer end a basket which is longitudinally collapsible in order to reduce the longitudinal space occupied by the collapsible basket, the boom and basket being adapted to be mounted on a rescue crash or service vehicle having a cab. The collapsible basket may be stored behind the cab with the boom in storage position behind the basket and both the boom and basket when stored, extending upwardly no further than the cab. The cab, with the basket positioned above at least a part of the cab, may have means providing access between the cab and basket, such as a sliding panel of the top of the cab and pivotal front and rear bottom plates of the basket.