Abstract: The present disclosure is related to a multi-purpose aluminum folding ladder having a detachable stand-on board and a pair of supporting handrails mounted thereto when used as a stepladder, and more particular to a foldable ladder which can be converted into ladders of different forms such as, a stepladder, a stretched climbing ladder, and also into work stations, and tables etc., and can further be assembled into a variety of exercising apparatuses with the assistance of a number of accessory parts on which people can do various kinds of exercise such as rowing, weight-pulling, chest-expanding, arm and leg strengthening; and can also be transformed into a chair for relaxation purpose. The multipurpose folding ladder is characterized by its practicality and readiness in use.

Abstract: A ladder stand-off device for supporting the upper end of a ladder in spaced relationship with a wall against which the ladder is leaned. The stand-off device includes a wall engaging brace which is movable about a pivot axis that is transverse to the ladder for adjusting the spaced relationship between the ladder and the wall. The ladder stand-off device includes a safety harness for wrapped around supporting positioning around a user of the ladder.

Abstract: A ladder comprises a ladder portion having stiles and rungs, a platform at the upper end of the ladder portion, support stays hinged to the rear end of the platform, and a safety rail also hinged to the rear end of the platform, and that invention is characterized in that the safety rail can occupy one of two positions, and when in its retracted position it projects forwardly of the platform thereby inhibiting use of the platform.

Abstract: A ladder consisting of a pair of spaced rails, a plurality of rungs having opposite end portions with first holes extending therethrough for receiving the rails in complementary mating relationship, first slots extending inwardly into the rungs from the bottom sides thereof and terminating at bearing areas which bear on the outer ends of first pins which are carried by the rails, and a pivotal rung-like base having end portions with second holes extending inwardly from the top side thereof for receiving the ends of the rails and second slots extending inwardly into the rung-like base from the top side thereof terminating at bearing surfaces which carry the load transmitted by the outer ends of second pins mounted on the lower ends of the rails.

Abstract: A ladder shield for use in preventing toddlers and the like from climbing the steps of a ladder, such as an above-ground swimming pool ladder, when the ladder or the device to which the ladder is coupled is unattended is disclosed. The ladder shield comprises a rigid yet slightly flexible shell of plastic which is sized and shaped to fit around the front and sides of the ladder so as to block access to the steps on the ladder. The ladder shield is removably secured to the ladder by a removable locking bar which when inserted extends through a pair of holes in the side walls of the shield. The locking bar is secured in place by a lock. When not being used to prevent access to the steps of the ladder, the ladder shield may be used as a mini-foot wash.

Abstract: A safety step fire escape is provided and consists of a plurality of steps mounted in a vertical spaced relationship to an outside wall of a building adjacent windows of the building. The last step is elevated high enough from ground level so that a person can only climb down the fire escape. A descent cable extends through the steps to guide the person down the fire escape. A signaling device is operable by movement of the descent cable from its normal position.

Abstract: A multi-positionable rail for the conveyor of an aircraft belt loader having a rail supported by a plurality of parallel posts pivoted to the side wall of the conveyor and to the rail and collapsible under the force of gravity against a stop positioned on the conveyor side wall to a stowed position wherein the posts and rail are within the silhouette of the conveyor. A first support arm pivoted on the conveyor engages a first pin on a post to position the rail above the conveyor to function as a hand rail and a second support pivoted on the conveyor engage a second pin on a post to position the rail intermediate the stowed and hand rail position. A latch trapped on the post above the first pin is urged by gravity to engage the pin to prevent disengagement of the first arm from the first pin.

Abstract: A telescoping seating system with a plurality of elongated rows movable between a forward extended use position in which the rows are in stepped relation and a rearward retracted storage position in which the rows are in superposed relation. Each of the rows includes a front riser, a rear riser spaced rearwardly of the front riser, a cantilevered seat fixedly attached to the front riser and extending rearwardly toward the rear riser, and a platform fixedly attached to the front riser and extending between the front riser and the rear riser, forming a self-supporting seat assembly. The seat assembly is mounted to a frame having a pair of laterally spaced, floor-engaging carriages, a pair of columns, each fixedly attached to one of the carriages and extending upwardly therefrom, and a pair of substantially horizontal, forwardly extending, cantilevered support arms each fixedly attached to one of the columns and having the seat assembly mounted thereon by the platform.

Abstract: A device for removably mounting a paint can from either side rail of a ladder comprises a support assembly including a channel-shaped section having a central portion with first and second side panels extending therefrom for mounting the device to either side rail of the ladder and a hook member secured to one of the side panels for supporting the device from a rung of the ladder; a receptacle comprising a cylindrical member having an open upper end for holding the paint can; and an arm secured to the receptacle and pivotably connected to the other side panel whereby the device can be mounted from either side rail of the ladder to maintain the rim of the paint can in a horizontal position regardless of the angle of incline of the ladder.

Abstract: A bin ladder construction includes a vertical ladder up the side of a grain storage bin and an inclined ladder from the upper end of the vertical ladder to the peak of the roof of the grain storage bin. Corner pieces of particular shape and configuration interconnect the inclined and vertical ladders. The ladders have hollow rungs open at both ends, and channel members extend through and beyond the ends of a pair of hollow rungs in the vertical ladder and in the inclined ladder. Triangular brackets mount the opposite ends of hand rails to the ends of said channels.

Abstract: A safety extension is adapted to be mounted by various adjustable means to the upper rungs of a ladder or the inside of a manhole. The safety extension comprises a rod which is moveable in a sleeve between extended and retracted positions. A counterbalance means mounted in a particular manner is optionally provided to facilitate moving the rod to the extended position with maximum ease and safety. Adjustable mounting means are provided to accommodate ladders of differing rung spacing and rung diameter.

Abstract: A combined standing and body support for a person working in elevated position and leaning over the work. A base frame provides a support for an upstanding super structure which carries both standing platforms and a body support. The platforms are movable and permit various elevations of standing, and the body support is movable in the vertical direction and in the horizontal directions. A body guard is provided for protecting against falling off the super structure. A counterweight is positioned on one end of the base frame to balance the weight of the user on the super structure which is at the other end of the base frame.

Abstract: A climbing deterrence device is attached to a vertical ladder leading to a water tank or the like. The device is configured to prevent unauthorized people from climbing the ladder and obtaining access to the tank or other structure to which it is attached. The device comprises a cage made of expanded metal and assembled from a plurality pieces that substantially encircle a conventional ladder in such a way that the device cannot be crawled over or through without unlocking a door which normally closes a climbing path through the device.

Abstract: A sleeve fits securely over a ladder rail with attached hooks over at least two rungs of the ladder. Attached to the side of the sleeve are a rigid hand rail and pivotable utility tray. Clips on the side of the tray hold tools. Supplies and tools are stored in the tray or the tray may be a paint roller tray. A slot or groove in either the sleeve or an extension of the tray permits tilting of the tray to a desired angle relative to the ladder. A bolt through one of the hooks secures the sleeve in place and permits the sleeve to be used upside-down on an opposite ladder rail. The sleeve may be constructed from a single sheet of material cut and bent into shape.

Abstract: A stair having a central stringer and two parallel side stringers. A plurality of vertically-spaced half treads is disposed on each side of the central stringer and extends between the central stringer and an adjacent side stringer. The half treads on one side of the central stringer alternate with those on the other side of the central stringer. The central stringer may or may not be a structural member depending upon the stair configuration but in all cases serves at least as a protective shielding of the inside corners of the treads, thereby minimizing user injury from the corners in case of a fall or other user mishap. A pair of handrails are disposed in a plane forward and parallel to a plane passing through the front edges of the treads and positioned with respect to the treads to provide support for a user.

Abstract: This invention is a combination stepladder and hand truck apparatus having a ladder support frame assembly pivotally connected to an upper portion of a hand truck support frame assembly and further including a support and lock plate assembly and a wheel support assembly which are both connected to a lower portion of the hand truck support frame assembly. The ladder support frame assembly includes a basic support frame with a support handle member at one end portion thereof and interconnected by axially spaced support step assembly. The support step assembly includes a lock or latch step member which is operable to support a user thereon and conjointly locks with the hand truck support frame assembly in a rigid condition when in the stepladder usage condition. The support and lock plate assembly includes a support plate member which is pivotally mounted on a support shaft member which, in turn, is secured across a lower portion of the hand truck support frame assembly.

Abstract: A step ladder for detachably mounting in a locked arrangement along the length of the permanent ladder of a recreational vehicle for preventing thieves from climbing to the top of the recreational vehicle, said step ladder having a smooth surface along its back support which is exposed when mounted on the permanent ladder to prevent use of the permanent ladder.

Abstract: Parallel tubular arms removably slide into the openings through the openings in the side rails and the hollow rungs of aluminum ladders. A swivel on at least one arm protruding through both ladder rails turns to secure the handrail to the ladder. Orthogonal extensions of the arms support the handrail in a fixed position away from the ladder. Depending on the relative lengths of the supports the handrail may be in parallel or sloping alignment with the ladder. Handrails may be installed on both sides of the ladder and a restraining means secured between the handrails.

Abstract: In a stepladder, with two legs which are connected with each other swingably around an axis in the region of an upper end of the legs, at least one of the legs has transverse support members which are supported by a first pair of stiles, and arranged spaced apart from each other in the longitudinal direction of the first pair of stiles to form the treads, said transverse support members being developed as board-shaped threads which, when the legs are spread apart a predetermined maximum distance, the standing surface of the transverse support members is horizontal and lies in horizontal planes, the treads being connected swingably about axes parallel to each other, to the first pair of stiles and to respective link members which are parallel to the first pair of stiles whereby a mutual supporting relationship between the first pair of stiles and the link members upon a predetermined maximum spread of the legs so as to increase the resistance to bending of the first pair of stiles and limit the swingability of

Abstract: A pool ladder for use by individuals confined to a wheelchair having a top step which is at a height substantially equal to the height of a wheelchair seat, and a second step which is at a height slightly above the wheelchair foot rests. Both the top step and the second step are moveably connected to the ladder so as to allow them to be moved aside during standard use. A series of support members serve a dual purpose by supporting the steps of the ladder and also providing handgrips for one entering or exiting the pool.

Abstract: A self-supporting helical staircase having an interconnected series of radial steps adapted to be swingably opened for providing vertically spaced horizontal support surfaces. The steps are angularly displaceable about a pintel post in progressive increments and are resiliently coupled for snap-lock engagement when in the fully extended position. A vertically extendible elongate handle is housed within the pintel post and can be locked at selected heights by a pressure clamp arrangement mounted at the upper end of the pintel post. The elongate handle can be folded about an articulated joint to a substantially horizontal position when in non-use. A sleeve member is slidable along the handle and can be positioned over the joint to provide vertical rigidity when the handle is to be used.

Abstract: A vehicle such as a tank truck having a catwalk along its top, is provided with a guardrail therealong that can be lowered during transport. A ladder provides access to the catwalk; and the guardrail and the ladder are so interconnected that when the guardrail is lowered, the rungs of the ladder are raised to prevent access to the catwalk.

Abstract: A tiltable, portable, pivotable marine type ladder which is horizontally oriented in its normal position and tiltable to a vertical position by the application of an initial force in the vertical downward direction. The ladder having two parallel struts capable of being secured to a marine structure, such as a floating dock, and having counterweight balances at the top of two support members pivotably connected to the struts. When one exits the ladder, the slight movement of the water activates the ladder such that it reverts to its original horizontal position.

Abstract: This application discloses a modular stairway system for circular structures or other structures having non-linear walls. The invention comprises a plurality of first stringer means with a plurality of first connecting means integral to said first stringer means for joining the first stringers, a plurality of second stringer means horizontally spaced from and parallel to the first stringer means with a plurality of adjustable second connecting means integral to said second stringer means for adjustably joining the second stringers such that the first and second stringers conform to the curvature of the structure. A plurality of stairs are horizontally interposed between the first and second stringers, and a stair mounting means for securing the stairs to the first and second stringers are provided.

Abstract: A man crossover for belt conveyors used in underground mines, the conveyors comprising spaced groups of belt-supporting rollers connected along each side of the conveyor by cables, comprises a light-weight frame and deck spanning the conveyor belt and supported above the upper flight thereof on the side cables. The supporting member at each end of the man crossover rests on its cable and is contoured to fit over it. The supporting members are locked in place on the cables with removable fittings. The man crossover deck is provided with handrails on each side. A man using the man crossover grasps the handrails with both hands, leans over the man crossover on his stomach and pushes himself onto the deck with his feet. He pulls himself over by the handrails swinging his legs around to the other end, and slides off, feet first.

Abstract: A circular ladder for use along a cylindrical wall and having a single stringer which is disposed in a helical path around the cylindrical wall and an array of half treads disposed on each side of the stringer. Each array of half treads is vertically spaced from the other along the length of the stringer, the half treads being affixed to and laterally extending from the respective sides of the stringer. Each half tread includes an outwardly extending portion which terminates in a plane which is forward of a plane passing through the front edges of the treads. First and second handrails are disposed in this forward plane and affixed to the outwardly extending tread portions. In an alternative embodiment, a single outside handrail is employed, the cylindrical wall providing a body support in place of an inside handrail.

Abstract: The invention relates to a telescopic aerial ladder, especially intended to be mounted on a transportation vehicle. Said ladder comprises a number of ladder members superposed on each other, each member consisting of two trapezoidal lateral wings connected by rungs. The upper and lower longitudinal edges of each member are not in parallel relationship but designed in such a manner that the distance between said edges is increasing towards the end of said member which remains imbedded within the corresponding end of another ladder member which is located near below said member.

Abstract: A ladder for a children's play structure comprises spaced-apart, elongate side members extending from a first end of the ladder to a second end thereof. A plurality of rungs extend perpendicularly between the side members, adjacent rungs having a distance therebetween which increases from the first end of the ladder to the second end. A third elongate member, parallel to the side members and midway therebetween, extends substantially from the first end of the ladder to the second end. The third member is outwardly spaced, away from the rungs, such that a child climbing the ladder from the first end towards the second end, having his feet on the rungs and grasping the third member, exercises his arm and torso muscles in lifting his body.

Abstract: A ladder which can be ascended and descended at either of two rates and which comprises an array of half treads on one side of a stringer and an array of full treads on the opposite side of the stringer, each array being vertically spaced from the other along the length of the stringer. Treads are affixed to and extend from respective sides of the stringer, and at least one of the arrays includes outwardly extending portions affixed to a handrail.

Abstract: A dual purpose ladder attachment usable singularly as a human body support platform with hand rails or in a pair as a scaffold jack. Each ladder attachment comprises two pairs of pivotally joined support beams. Each pair of pivotally joined support beams have their non-joined ends connected to ladder rung engaging brackets. Each bracket is sized and shaped to fit over the side rail of the ladder while engaged with a ladder rung. When the device is being used as a body support platform, a cross-bar connected between the parallel support beams supports a rigid planar surface which is also attached to a ladder rung. This platform is useful for standing on the ladder while holding the side rails. In this configuration the device is mounted to extend vertically upward on the upper side of the ladder, allowing a user to stand comfortably on the ladder.

Abstract: A stepladder comprises a pair of front legs pivotally attached to a forward platform and a pair of rear legs pivotally attached to a rear platform. The front platform and rear platform are hingedly attached to one another for movement between a coplanar position and a folded position. The front legs are releasably locked in a position perpendicular to the front platform. The rear legs are releasably locked to said rear platform at an angle of about 110.degree.. A support member is pivotally attached to the front legs to extend perpendicularly upwardly from the front platform.

Abstract: A retractable safety handle means for a ladder having a hinge means permitting horizontal movement in and between its retracted and its extended or handle-providing positions, and providing sturdiness of bracing even though retractable for ease of transport and storage.

Abstract: A portable fence stile comprises in combination:(a) a U-shaped metal tubing of a sufficient strength to support a man and adapted to have the legs thereof placed over a fence in a generally vertical position,(b) a foot support on each of the legs a stepping distance above the ends of the legs; and(c) a stabilizer plate between the legs at the upper portion thereof slideably connecting therewith and having an opening in said plate adapted to fit over the end of a fence post.

Abstract: The arrangement comprises a rigid structure having a support portion, e.g. in the form of a chair. On opposite sides of the support portion are hingedly mounted two step units. The step units are so designed and arranged that in their inoperative position they can be stowed under the support portion. When needed, one unit is pivoted through 90.degree. from under the support portion and comes to bear on the ground beside the rigid structure, and the other unit is pivoted through 270.degree. from under the support portion and comes to bear on the support portion. Each unit may have two steps and the two units may thus provide a flight of four steps. The rigid structure, when in the form of a chair, may have a back rest provided with a vertically slidable hand rest.

Abstract: A mounting assembly for hanging a bunk bed ladder from the upper bunk of a bunk bed wherein the vertical flange of one of the upper bed rails is formed with a pair of slots each having an entry portion disposed above and communicating with a narrower retaining portion. A pair of hanger brackets are attached to the bunk bed ladder each bracket having a mounting leg with a narrow region slightly narrower than the retaining portion of the slots and an outer region wider than the retaining portion but slightly narrower than the entry portion of the slots. The mounting legs of the hanger brackets are arranged for insertion through the entry portions of the slots to position the narrow regions thereof for lowering into the retaining portions of the slots, in which they are retained against lateral movement or inadvertent withdrawal by being positioned on the horizontal flange of the bed rail and under the box spring that is supported on the bed rail horizontal flange.

Abstract: This invention is an interlocking, segmented, ladder for use on high rise buildings and the like; wherein, the ladder is stored horizontally between floors of such building so as to not create an unpleasant or dangerous permanent exterior structure, and wherein the ladder may be automatically or manually actuated in the event of an emergency, in which case each section is extended from its horizontal position of storage within the building and is rearranged in a vertical position on the exterior of the building; and, appropriate safety footings are provided for inter-locking of the various elements; and, a series of safety devices are incorporated so that persons using the ladder will not fall from it and provisions are made for safe entrance onto the ladder.

Abstract: A ladder is provided which is especially adapted for shipboard use and which is safe and comfortable to use, of relatively light weight and occupying relatively small floor and overhead space. The ladder comprises a single stringer disposed between upper and lower deck or floor levels at a predetermined angle of inclination, and having an array of half treads on each side of the stringer, each array being vertically spaced from the other along the length of the stringer. The half treads are affixed to and extend from the respective sides of the stringer and each include an integral outwardly extending portion which terminates in a plane forward of a plane passing through the front edges of the treads. Handrails are disposed in this forward plane and are affixed to and supported by the outwardly extending tread portions.

Abstract: A handrail assembly for a curved staircase, which includes baluster means having support elements adapted to connect to a handrail with connectors such as screws and a handrail formed from stranded aluminum cable coated with a continuous layer of heat-sealable plastic and connected to the support elements. Methods for splicing the handrail and mounting it on the staircase are also disclosed.

Abstract: A ladder locking device designed for attachment to a frame-mounted ladder. The ladder lock includes a panel dimensioned to cover the front side of the ladder over an area including a plurality of ladder rungs. The upper edge of the panel is bent to form a lip engageable with an upper ladder rung. Attached to a lower portion of the panel is a lock operable to position a locking member into engagement or disengagement with a lower ladder rung, whereby the device is locked to or released from the ladder.

Abstract: This invention relates to a specialized ladder for use with a ring-like shield bordering the entryway into a manhole, said ladder being characterized by hook-forming subassemblies depending from the right and left handrails adapted to releasably hook over the upwardly-facing rim of the shield, each such hook subassembly including a hanger member projecting out over the shield rim in overhanging relation to the latter, a downwardly and inwardly inclined tubular slide on the overhanging end of the hanger member and a self-locking latch pin mounted within said slide for automatic free-sliding gravitational movement therein from a retracted unlocked position out of contact with the cylindrical shield wall into an extended latched position resting thereagainst.

Abstract: The present invention provides a portable light-weight ladder for use in connection with welding metal plates together positioned in an upright or vertical position comprising a main frame portion having extended side rails or stanchions which are rigidly affixed to each other by connecting rungs at each respective end of the side rails as in the manner of a conventional ladder. The side rails are further joined to each other by interconnecting rungs which in turn are provided with a removable portion at approximately the center thereof which portion can be swung or relocated out of position to provide access to an area immediately behind the particular rung, e.g., to gain access to a seam to be welded. One end of the present ladder is provided with an attachment for securing the ladder against a structure upon which the present ladder is to be employed.

Abstract: A vertically positioned post detachably affixed to a step ladder has a slotted clamp adjustably positioned thereon for holding the bail of a bucket on the step ladder or alternately engaging the rim of the bucket. The upper end of the post forms a safety handle.

Abstract: A guard to bar access to ladder rungs comprising a first and second rigid sheet pivoted together. The upper sheet has an upper hook to hang over a rung of the ladder. The lower (second) sheet has a joggle which enables a portion of it to pass behind a ladder rung and lock means to lock the second, lower, sheet to a rung whereby the first sheet and a portion of the second sheet bar access to the ladder rungs and the upper hook and the lock means prevent removal of the shield without first releasing the lock means.

Abstract: A crossover or bridge for shipment as a compact unit for assembly at an installation site comprising a bridge section and a pair of stairways for connection with opposite ends of the bridge section. The bridge section is disposed in an elevated position relative to bottom ends of the stairways when assembled therewith for spanning an object. The bridge section comprises a pair of transversely spaced crossover panels with a grating or decking carried thereon. Readily assembled joint means are provided between the stairways and the bridge section at its opposite ends.

Abstract: A combination carrying case and step unit wherein the case is adapted to contain small articles and is rigid to support the weight of a user standing thereon. The case is provided with means having two operative positions which serves in an extended position to be grasped by a user standing thereon and which has a second retracted position convenient for transport of the case from place to place.

Abstract: A telescopic set of steps comprises at least two frames, each of which consists of two parallel members forming stringboards, one end of one of the frames being pivoted to a fixed support for pivotal movement about a horizontal axis, and the other frame being slidable along the pivoted frame, means for varying the slope of the set of steps, a plurality of steps pivoted about respective axes parallel to the said horizontal axis and comprising a first group of steps mounted directly on the sliding frame, and a second group of steps, each of which has an axle mounted on a respective pair of supports which are slidable along a pair of slideways formed on respective stringboards of the pivoted frame, slideway extensions extending onto the fixed support to a distance at least equal to the length of the sliding frame, means for maintaining a constant spacing between the pivot axes of the steps, means for maintaining the steps parallel to one another, and means for setting the inclination of at least one step.

Abstract: A safety ladder assembly having a plurality of steps and at least three support feet for supporting the ladder on a horizontal surface. A caster assembly having at least three casters for providing for rollingly transporting the ladder from one location to another. The casters are positively and conjointly moveable between a retracted storage position in which the support feet stably support the ladder on a horizontal surface and a second transporting position in which the casters stably support the ladder assembly on the horizontal surface with the support feet elevated thereabove so that the ladder assembly may be rollingly transported along the surface. A linkage interconnects the casters so that they may be raised and lowered via actuating and retracting pedals.

Abstract: A mobile ladder has a base, castors mounted to the base, a ladder connected to the base, a support member connected at one end to the base and at the other end to the ladder forming a structural triangle between the members, the ladder including a floor engaging member affixed thereto. The connection of the ladder to the base includes a link member which also forms a step of the ladder, pivotally mounted to the base about a first axis, and the link is also connected to the ladder about a pivot having an axis parallel to the first axis. The link is adapted to pivot about the first axis such that the ladder, if it follows an arc between the first position where the ladder is engaging the floor in frictional contact therewith and a second position whereby the ladder pivot with the link is passed over the gravitational dead center above the first axis and the ladder is cleared of the floor.

Abstract: A step stool includes a handrail attached to one side with non-skid steps that make it safe when standing on the step stool. Stabilizing bars are connected to the step stool to prevent it from tipping over due to a user placing his weight on the hand rail when standing on the step stool.

Abstract: A plurality of telescoping tubes form a rail assembly which is pivotally connected at its lower end to a post, a sleeve is slidably received in the uppermost tube which is provided with an upper stop ring and a lower ring to limit the motion of the sleeve. A link is pivotally connected between the sleeve and an upper post. Thus, as the seating system is extended for use or retracted for storage, the handrail also extends and retracts. A stop element on the link limits the position of the link in the extended position so that the axes of upper and lower rail assemblies are aligned. In a preferred embodiment, the posts are inclined forwardly so that the rail assemblies are vertical in the storage position.