Abstract: A multi-purpose, lightweight, portable ladder comprising a plurality of link elements pivotally secured together in end-to-end relation, each link being of a substantially A-shaped configuration wherein one end of a first link is disposed between the legs of the next succeeding link and the two links are pinned together for relative rotation movement about the axis of the pin whereby the ladder may be folded or rolled into a relatively small configuration during periods of non-use. A hook member is secured to the outer end of the leading link in the chain of the ladder for facilitating securing of the ladder in a substantially vertical position, and the last link in the chain may be securely anchored to the ground for holding the ladder in the vertical position during periods of use.

Abstract: The present invention relates generally to a boarding ladder for use in conjunction with an inflatable boat having an inflated side pontoon and specifically, to an improved boarding ladder including a strap assembly for mounting the ladder to the inflatable boat. The improved boarding ladder includes a rigid ladder portion containing a pair of struts extending from the rigid ladder portion towards the boat. The struts cooperate with a horizontal cross-piece at the top of the ladder portion to mount the boarding ladder in an orientation extending downwardly and outwardly from the side of the boat and prevent the ladder from rotating under the boat when in use.

Abstract: A simple device comprising members such as a pair of identical tubes or bars fastenable anywhere along the rails or stiles of a ladder by U-bolts passing through diametric bores is provided. The U-bolts constitute a clamping means whereby standoff members can be made secure to respective sides of a ladder, such members extending forwardly to engage the wall or roof of a building or to hook over the apex of a sloped roof or ridge pole of a building where the ladder is used by a workman on the roof to facilitate his movement on a sloping roof. The ends of the tubular members are provided with abrasion protecting caps so that the ends of the tubes will not scuff or mar a surface against which they are raised.

Abstract: A ladder having an upper end brace attached to the upper end of the ladder, the upper end brace incorporating leg means adapted to extend over the ridge of the roof, and engage the pitch of the roof on the opposite sides from the ladder, thereby securing it in position without the use of further fasteners. A ladder spacer is provided towards the lower end of the ladder which is adapted to raise the ladder off the roof.

Abstract: A fire escape device has a box with a back panel secured to side panels and to two bottom end panels. A bottom central panel lies between the bottom end panels and is hinged to the back panel. A front panel is hinged to the bottom central panel and has a bottom edge rabbet interfitting with the front edge of the bottom end panels. A removable top panel has angles engaging the upper edges of the back panel and of the front panel and is short to leave end openings above the bottom end panels through which ornaments on the bottom end panels may project. The box is secured to a building by brackets secured to the back panel and the two bottom end panels. Brackets of one design lie over a balcony rail, and brackets of another design are bolted to the building wall. A ladder including side chains and cross rungs is disposed on the bottom central panel with the chains extending through cutouts in the top panel.

Abstract: A safety bracket for securing a ladder in place against a building structure, the bracket having two extending arm members interconnected in crossing relation intermediate the respective ends thereof with each arm member being slidable with respect to the other. Each arm member includes an intermediate portion and two end portions pivotally joined to the intermediate portion, the two end portions of each arm member including, respectively, a hook shaped portion which may be hooked around an upright member of a ladder and an eyelet for receiving therethrough a projecting member secured to the building structure.

Abstract: A boat boarding ladder for engagement to the gunwale of a boat includes a U-shaped frame having upstanding legs attached at one end by a bottom rung. A U-shaped support member is pivotally attached to the upper end of the legs of the frame. A bar is attached between the legs of the frame intermediate of the pivotal connection of the support member to the frame and the frame rung. The legs of the support member are curved such that the support member when pivoted against the bar attached across the legs of the frame forms a receiving area between the support member and the frame for attachment of the ladder to the gunwale of a boat. A Y-shaped brace is pivotally attached to the legs of the frame intermediate of the attachment of the support member and the rung to the legs of the frame. A chain is attached between the legs of the frame and the brace member and positions the brace member out of the plane of the frame and against the hull of the boat at an incline relative to the boat.

Abstract: A fire ladder includes as opposite sides a pair of elongate flexible cables in the form of interwoven strands of wire. Hollow tubes flattened and scored on their upper surfaces extend rigidly between the cables to provide the ladder rungs. The rungs have initially open ends into which looped portions of the cables are inserted. One side wall of the rung is then crimped inwardly and pressed against the opposite wall to firmly clamp the cable within the rung. Hook-like arms secured to the ends of the cables serve to suspend the ladder from a window sill and may be folded by means of a hinge structure to a collapsed storage position occupying little space. A spring located within the hinge arms maintains the hook-like support arms spaced apart during use, while stops prevent the arms from pivoting excessively.

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: A bracket including a clamp for removable clamped engagement with a ladder is provided for support from an upstanding inclined ladder and includes a rigid support arm projecting horizontally outwardly from the clamp and the side of the ladder facing in the direction toward which theladder is inclined. The outer end of the arm includes a mount supported therefrom for angular displacement about an axis extending transversely of the support arm and an elongated clamp arm is supported from the mount for oscillation therewith relative to the arm. The clamp arm is disposed at generally right angles relative to the axis of oscillation of the mount and is swingable with the mount in a plane generally paralleling the support arm. The clamp arm includes one end portion which may be lengthwise advanced and retracted relative to the mount.

Abstract: A portable escape ladder comprises a bracket for gripping over a building window ledge, a pair of chains suspended from the bracket and supporting a series of spaced transverse rungs therebetween and optional stand-off devices attached at least to some of the rungs to hold the ladder a fixed distance from the building wall. There is provided a form of connection between the rungs and the chains in which the ends of the rungs are pressed flat and formed with an opening in which the junction of a pair of chain links is captively held. The optional stand-off devices comprise substantially flat frames with upright extensions fitting in bores formed in the respective rungs and fastened in place by snap nuts on the ends of the uprights.

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 limb attaching lock formed in a manner of a hoop comprising two semicircular segments pivotally attached at one end thereof to a floating center bracket. The semicircular hoop segments are furthermore pivotally supported on a corresponding set of pivotal standoffs attached to a mounting fixture which also connects to two biasing springs for maintaining the hoop segments open. The mounting fixture, in turn, is secured to an attachment brace adapted to engage the end of the ladder. To allow for selective alignment of the limb attaching lock relative the brace and, therefore, accommodate various angles of the limb, the attachment fixture includes a rotatable mount which can furthermore be secured at any desired angle of orientation. A cord connected at one end to the floating bracket extends through openings in the fixture end brace for securing the hoop lock in a closed position.

Abstract: The hook assembly includes a hook which passes through a hollow top rung of the ladder and an enclosed locking assembly which secures the hook to the rung for selective rotation between a storage condition and a hooking use condition.

Abstract: A scaffold having a plurality of vertically spaced horizontal bars, a ladder having horizontal rungs and horizontally spaced vertical uprights, and a scaffold ladder adapter positioning the ladder adjacent the scaffold. The adapter comprises a bracket having spaced arms connected by a base telescoped over each upright of the ladder under a rung of the ladder. The ends of the arms are removably mounted on a horizontal bar of the scaffold and a strap individual to each bracket is disconnectably connected at the lower end to its respective bracket and at its upper end to a horizontal bar spaced vertically above the horizontal bar which is connected to the brackets.

Abstract: A ladder kit comprises a plurality of parts from which a ladder may be constructed. The parts of the kit may be selected and assembled in a number of ways, resulting in various types of ladder structures. The main components of the assembled ladders include elongated tubular side rail sections and rectangular frame sections. The frame sections fasten the side rail sections into coplanar pairs and form the rungs of the ladder.

Abstract: A service platform for removable mounting on a vehicle bumper includes a generally planar platform member with means for engaging the bumper for supporting and locking the platform thereto in a substantially horizontal plane and for permitting unlocking and removal from the bumper when the platform is moved to a substantially vertical plane.

Abstract: A support arm structure for the upper end of a ladder is provided and includes mounting structure for mounting one end of the support arm structure on the upper end of the ladder for swinging of the support arm structure about a transverse axis extending transversely of the associated ladder, the support arm structure being swingable in a plane in which the ladder is disposed. The outer end portion of the support arm structure includes relatively pivotable opposing jaw structures and a connecting link is connected between the jaw structures and a portion of the mounting structure stationary with the ladder whereby the connecting link may effect relative oscillation of the jaws toward and away from each other in response to swinging movement of the support arm structure relative to the ladder.

Abstract: A ladder is disclosed which includes telescoping sections that collapse and extend for adjusting the length of the ladder. The ladder is particularly useful on boats and may have curved upper ends on its side members for hooking the ladder over the side of a boat. The curved ends are rotatable for collapsing them toward the major plane of the ladder. Rotatable stand-off legs are also provided.

Abstract: A portable, light-weight, multi-section step ladder for scaling poles and formed by a main or top section followed by a train of extension sections. Each section includes a single vertical spar and a series of steps secured thereto. The upper end of the main section is provided with an open-loop assembly adapted to engage the pole and to harness this section to the pole when a downward force is exerted thereon, the lower end of the main section terminating in a coupling head. Each extension section is provided at its upper end with a latching piece adapted to engage a coupling head and at its lower end with a coupling head, whereby the main section and the extension sections may readily be interlinked to form a ladder whose length is sufficient to scale the pole.

Abstract: An extension ladder in which the extension part has a plurality of striated cut-out portions along the leaning edge to serve as hooks for hooking onto a gutter or top edge of a sidewall or roof of a building to prevent lateral or vertical sliding. A lining of rubber or similar material is preferably provided in the cut-out portion to provide an anti-skid surface to further prevent lateral sliding.

Abstract: A self storing fire escape ladder of foldable type, including a plurality of pivotally interconnected rung sections and enlarged hook means for engaging a window sill or similar structure during use. The hook means is of effective width less than that of the rung sections, and so contoured that when the rung sections are folded against each other to form a compact unit, the hook means may at least partially encircle the rung sections to hold them in mutually folded relation and form carrying handle means. Optional latching means is provided to prevent movement of the hook means relative to the compact unit when the former is employed as a carrying handle.

Abstract: A ladder is made from extruded aluminum steps supported on a pair of vertical tubes fitted through large diameter holes drilled vertically through the steps. The steps are hollow except for a pair of vertical walls extending longitudinally thereof and lying on opposite sides of the vertical holes. Small horizontal holes are drilled through these walls from the rear of the steps to receive fastening pins which are driven through the tubes to locate and support the steps on the tubes.