Abstract: Ladder assemblies are needed on large vehicles for an operator to ascend to the cab of a vehicle. The ladder assembly should be moveable between a lowered position for easy access and a raised position to prevent damage to the ladder when the vehicle is in use. The subject ladder assembly includes a pair of spaced rails mounted to the vehicle and an elongate ladder moveably positioned between the spaced rails. Cooperating means extend between the rails and the elongate ladder to position the ladder with respect to the rails and guide the ladder on the rails when the ladder is moved. The arrangement of components provides a simple and compact arrangement for raising and lowering the ladder.

Abstract: An all purpose ladder includes a fixed base ladder segment that is conventionally made with long side pieces that are connected together by rungs or steps. An upper ladder segment comprises a pair of long side pieces connected together by rungs. As is conventional with extendible ladders, the side pieces of the upper ladder segment are in sliding engagement with the side pieces of the base ladder segment. A screw or worm shaft is rotatably mounted to one side piece of the lower ladder segment and a threaded bracket engages both the upper ladder segment and the screw or worm shaft such that when the screw or worm shaft is rotated about its longitudinal axis, the bracket travels along the length of the screw or worm shaft, thereby moving the upper segment relative to the fixed base ladder segment. Gears and a handle are provided so that a user can adjust the relative extension position between the base ladder segment and the upper ladder segment on a continuous basis.

Abstract: An apparatus including a planar support member including a forward and rear face; each face aligned parallel to one another with a through extending diamond shaped rod directed orthogonally through the forward and rear faces, with a square groove formed in the rod adjacent the rear face to receive a chain link grid member therein. An enclosing safety chain is positioned in surrounding relationship relative to the adjacent chain link fence and an upper rod of the rod members. A modification of the invention includes a step plate defined by a diamond shaped socket and a planar step member aligned with the socket securable to the rod members.

Abstract: A scaffold bracket for mounting on a ladder. The bracket comprises at least two legs, which are connected at one end to define a junction, said legs divergingly extending from the junction to their free ends. A plurality of first rung engaging members are distributed along the legs from their free ends and terminate short of the junction. A link is attached at the junction and terminates in a second rung engaging member. The bracket is so constructed and arranged that the legs are placed over a selected rung of the ladder and are engaged thereon by engagement of a first rung engaging member, the second rung engaging member is engaged over an upper located rung, a second bracket is similarly mounted on a second ladder placed side by side relative to the first ladder, and a wood plank is placed on the two brackets to constitute a scaffold.

Abstract: A pillar used as part of a shoring, decking or scaffolding frame is made from length of aluminum extrusion having an octagonal periphery with a plurality of internal radial projections whose ends jointly define an unencumbered axial channel dimensioned to receive at either end, the threaded stem of height-adjustment screw-jacks, without need of any screw-jack-mounting sleeves or other screw-jack-centering and holding device.

Abstract: A display device for releasably supporting cards, signs, and the like, the display device including a frame having an aperture for receiving at least part of a display card, means housed in the frame for securing the display card within the frame, the means for securing including a card engaging member movable between a card retaining position wherein the card is secured in the frame and a card releasing position. The display device also includes manually operable means at least partially housed in the frame for selectively moving the card engaging member between the card retaining and the card releasing positions, and means for locking the card engaging member in the card retaining or card releasing position.

Abstract: A compact foldable mechanic's walk for facilitating servicing of motor vehicles by improving access to the engine compartment. The mechanic's walk includes a pair of relatively narrow elongated planar mirror image platform members hingedly connected together along abuttable acute angular ends. The platform members are supportable by a plurality of pivotally supported legs adapted to be folded in against the bottom surfaces of the platform members. The platform members preferably are flanged so that in folded condition the in-folded support legs are enclosed within a box-like enclosure.

Abstract: The specification discloses a removable safety system for construction workers which is mounted on an I beam which provides a cable hand hold to which a safety lanyard may be fastened. The ends of the cable are terminated by a special device that increases the grip of the device on the beam when a load is applied.The safety system may be installed on the I beam at ground level and hoisted with the I beam as it is positioned for attachment to a building or bridge.

Abstract: Device and method for transporting and distributing materials and/or equipment at the periphery of a building by using a carrier structure similar to a scaffolding or to a working or circulation walkway filled with a parapet including a carriage having at least one sliding or rolling member connecting the carriage to at least one longitudinal solid element of the parapet said connection transmitting to the parapet at least the resulting efforts equivalent to the horizontal component of the force diagram of a device.

Abstract: The invention relates to a device for securing a pipe (1) to a seat (2). A clip (4) is tightened around the pipe (1) by fixing both ends thereof to the seat (2). The object is to provide a securing device which is able to follow the longitudinal movements of the pipe without losing its grip around the pipe. This is achieved in such a way that cup springs (8) are arranged between the seat (2) and a nut (6) for fixing the clip (4).

Abstract: The escape of the present invention is installed in each storey of a building and comprises a storage space for the escape, a sliding platform, and an escape passageway. The storage space is formed in each storey of the building to have a configuration of a rectangular parallelepiped. The storage space has an opening in an external wall of a building. The platform is normally put away in the storage space and, in case of emergency, slides out from the opening of the storage space to form a landing of the escape passageway. The escape passageway is put up in the platform while one end of the passageway is pivotally attached to the platform to rotate the passageway downwards. When the escape is used, one end of the escape passageway rotates toward a lower platform to form an inclined passage between the upper and lower platforms.

Abstract: The present invention discloses an emergency ladder equipment. Such an emergency ladder equimpment is mounted on the outside wall of the top floor of buildings. The emergency ladder equipment substantially comprises a number of ladder members which are stored in a storage case in a stacked or folded manner except for an emergency case, wherein the storage case is mounted on the outside wall of buildings. Each ladder member is connected by a connecting device to the subsequent ladder member. Furthermore, the bottom end of each ladder member is supported by a support stay disposed in the storage case. By releasing the support stay, each ladder member slides down one after another in series while being connected by a plurality of connecting devices to form a complete ladder which is installed along the outside wall of the building.

Abstract: A ladder assembly for ease of access to a wharf or pier is disclosed. The ladder assembly includes a pair of vertical frame members having channels therein which are disposed about a ladder which is free to move upwardly and downwardly within the channels. The ladder may be secured to a cleat on the pier in a raised position when not in use. Upon releasing the ladder from the cleat, the ladder will move downwardly under its own weight so that its lower portion enters the water. A plate member attached to the top rung of the ladder will engage the deck surface of the pier in the lowermost position of the ladder.

Abstract: A composite structure for supporting and displaying articles includes a main rectangular planar element having front, rear and opposed side edges, an auxiliary rectangular planar element having front, rear and opposed side edges one edge of the auxiliary rectangular planar element being of a configuration which is irregular and complementary to one irregular edge of the main rectangular planar element to define a disjointable irregular junction between the units together with a reinforcing under structure integrally formed with the lower surfaces of the main and auxiliary units and including a plurality of spaced apart longitudinal reinforcing ribs each of the reinforcing ribs being severed at the disjointable irregular junction to accommodate separation of the units.

Abstract: A rolling fire door consists of a plurality of interconnected fireproof slats forming a curtain which is received by a pair of tracks along the sides of an opening to be secured. A torsion spring assembly assists in the raising and lowering of the curtain during normal operation. A torsion spring tube, rotated by raising and lowering of the curtain, is connected to a hydraulic pump. Upon the sensing of smoke, fire or the like, the torsion spring mechanism is disengaged and the curtain begins to fall by its own weight within the pair of tracks. The falling of the curtain rotates the torsion spring tube and accordingly drives the hydraulic motor which includes a restriction providing a load to the rotation of the torsion spring tube, thereby restricting the rate of descent of the curtain.

Abstract: A hoisting apparatus for a manhole adapted to be fastened to a guardrail of a manhole. The hoisting apparatus is vertically spaced above and extends across the manhole. The hoisting apparatus has two operating positions enabling it to raise an object out of the manhole, maneuver the object horizontally over a surface area adjacent to the manhole, and lower the object onto the adjacent surface area. Likewise, the hoisting apparatus can be utilized to raise an object off the adjacent surface area, maneuver the object over the manhole, and lower the object into the manhole. Furthermore, the hoisting apparatus is lightweight, portable, and mechanically non-complex.

Abstract: A collapsible fire escape ladder. A plurality of folding ladder sections are retained in the folded position by a retractable ladder retention means that slidably engages retention posts fixedly attached to the respective ladder sections. A pivotally mounted ladder entry step is attached to the proximal end of the ladder retention means to facilitate emergency escape through a window or the like. In an alternative embodiment of the ladder, the ladder retention means includes an exit platform having an exit portal disposed when said ladder retention means is retracted above the rungs of the ladder sections.

Abstract: A safety base is provided for a scaffold. The scaffold has casters so that it can be moved periodically at the job site. The safety base has two components, each consisting of an elongate bar with adjustable safety legs near the ends, along with detachable locks for readily attaching the component to frame members of the scaffolding. Feet of the legs are positioned near the supporting surface so that if the casters encounter a depression as the scaffold is being moved, the feet will engage the surface and the scaffold will not tilt excessively.

Abstract: An emergency escape device in the form of a flexible strap- or rope-like support attached to an enclosure installed on an inside building wall beneath a window is disclosed. When the device is not in use, the flexible support is housed within the enclosure, which is designed to blend aesthetically with the decor of the window and the inside building wall. When in use, the flexible support is designed to extend from the interior of the enclosure, over the windowsill, and down the outside building wall. The proximal end of the flexible support is composed of fireproof steel cable or chain of sufficient length to extend from its point of attachment within the enclosure to the outside building wall. The flexible support may be provided with gripping areas and/or an adjustable harness to facilitate descent to a lower level window or to ground level.

Abstract: A work support bracket is improved by providing it with brace members having a cross sectional shape. The brace members are fixed to first and second horizontal socket members respectively such that the upper horizontal segments of the brace members extend away from one another. The lower, central regions of the vertical segments of the brace members are notched to straddle the first and second horizontal socket members respectively. The outward, central regions of the upper horizontal segments are notched to define elongated pathways extending through first and second generally vertical socket members respectively and through said notched outward central regions respectively. The lower horizontal segments of the brace members are first and second pairs of tab members which extend from opposed ends of the first and second brace members respectively.