Abstract: A ladder made of a rectangular main frame, spaced parallel rods interconnecting the two long side legs of the ladder, and step panels each pivotally mounted at its front corners to one rod for pivotal action within the ladder frame. A rigid link pivotally interconnects the rear corners of the step panels on each side thereof. Short lever arms also pivotally interconnect the rear portion of the side edges of the topmost step panel to the interior face of the respective side legs. Each short lever arm has a central longitudinal slot slidingly engaged by a pivot pin projecting from the frame side legs.

Abstract: This ladder is designed to clamp to sign posts for workman safety. Primarily, it consists of a pair of stepped legs with a hinged shelf at the top having a clamp that clamps to a sign post. A second clamp is also provided below and is secured to arms attached to the legs, and a pair of extension rods are provided on the legs for stabilily of the legs on sloping ground surfaces.

Abstract: Improved boat boarding ladders, that may be mounted on a boat in a boarding position wherein they extend into the water and mounted in different stowage position wherein they are clear of the water, are formed of a step section, a support section and mounting units, all of which are separable from each other. The step section has a pair of tubular siderails and a plurality of steps fixed between them. The support section includes a pair of U-shaped tubular members each braced by a bar that is fixed at its ends across the arcuate portion of such member. One free end of each U-shaped member is enlarged so the upper end of a siderail may be fitted therein and locked with a through pin so the support section extends normal to the step section. The mounting units each include a tubular portion into which ends of the U-shaped support section members may be fitted to hold the ladder in the boarding position, while ends of the step section siderails may be so fitted to mount the ladder in the stowage position.

Abstract: An apparatus for installing an escape slow lowerer stably at an arbitrary place on a building. The apparatus has a ladder body, horizontal rods mounted on the ladder body and vertical rods mounted slidably and lockably on the horizontal rods to form a gate-like shape for holding the building. The apparatus further comprises a foldable ladder connected to the ladder body and a column having a metal fixture for supporting the escape lowerer.

Abstract: A portable elevating device constructed according to the preferred embodiment of the present invention is shown as including a winch frame for mounting a winch and a harness assembly secured to the winch frame for supporting an operator. In the preferred embodiment, the free end of the cable of the winch is releasably secured at a vertical position by a C-shaped anchor. The anchor may be positioned at the vertical position by a telescoping pole releasably secured thereto. After the free end of the cable is secured to the vertical position, the operator located in the harness assembly can elevate or lower himself by rolling or unrolling the cable on the winch. The winch frame in its most preferred form includes a rope gripping member for gripping a rope secured to a vertical position and moveable between a non-engaging position and an engaging position to thus operate as a safety line if the winch, cable, or anchor should fail.

Abstract: A portable elevating device constructed according to the preferred embodiment of the present invention is shown as including a winch frame for mounting a winch and a harness assembly secured to the winch frame for supporting an operator. In the preferred embodiment, the free end of the cable of the winch is releasably secured at a vertical position by a C-shaped anchor. The anchor may be positioned at the vertical position by a telescoping pole releasably secured thereto. After the free end of the cable is secured to the vertical position, the operator located in the harness assembly can elevate or lower himself by rolling or unrolling the cable on the winch. The winch frame in its most preferred form includes a rope gripping member for gripping a rope secured to a vertical position and moveable between a non-engaging position and an engaging position to thus operate as a safety line if the winch, cable, or anchor should fail.

Abstract: The invention disclosed herein comprises a ladder roof brace which includes adjustable means of engaging the rungs of a ladder, means of bearing against both sides of a roof over a ridge and means of engaging a gutter.

Abstract: A door or partition mounted exercise device for exercising muscles of the arms and upper body. The device includes an exercise portion attached to a mounting apparatus. The exercise portion is composed of a pair of parallel lateral support members extending perpendicularly from a centrally located transverse positioning bar. A pair of beam members extend perpendicularly downward from the lateral support members when the exercise device is in a vertical position. A pair of lower support legs extending perpendicularly from the beam members in an orientation parallel to the lateral support members. The mounting apparatus is a pair of parallel members upon which the transverse positioning rod can be affixed. The upper ends of the parallel members are formed into hooks which can be mounted over the top of a conventional door. The lower end of the parallel members extend perpendicularly outward to form projections extending into the terminal ends of the lower support legs opposing the beam members.

Abstract: The invention is a climbing device comprising a ladder with a pair of spaced apart upright members for leaning against a structure and a plurality of spaced apart rungs each extending between and supported by the upright members, a stabile support member having a base portion for securement to the structure and a retainer portion engaged with one of the rungs and selectively disengageable therefrom, and fastening means for fixing the base portion to the structure. The securely fastened stabile support prevents slippage of the ladder and together therewith provides a safe apparatus for climbing structures.

Abstract: A latch mechanism for attaching accessories such as boarding ladders, ski tow bars and lights to a small boat. A latch plate is secured to the boat and carries a socket having an internal annular rib. A tube projecting from the accessory carries a pair of opposed latch elements each having an enlarged head extending out of the tube. A U-shaped spring wire urges the latch elements apart toward a latching position in which the heads of the elements securely interlock with the rib when the tube is fully inserted in the socket. Cam surfaces on the latch heads interact with the rib to displace the heads so that they can pass the rib as the tube is being inserted. Each latch element has a release button which extends through the side of the tube. When the buttons are depressed, the latch elements are released from the rib to permit the tube to be withdrawn from the socket.

Abstract: A ladder attachment is provided for holding a ladder on a sloping roof. Sharp, pointed members or claws are attached to the ladder which, in operation, protrude from the ladder in a direction facing the roof. The sharp, pointed members pierce into the roof a selected distance at a selected angle and hold the ladder on the roof without sliding. Multiple non-skid surfaces are also provided on the rungs of the ladder for supporting the user.

Abstract: A firefighters' roof scaffolding is disclosed which is used by firefighters for standing upon the roof of a burning building in order to make a ventilation hole in the roof for ventilating the gases, and the like, from the interior of the building. The scaffolding has a cross beam of hollow construction, which mounts at one end a ladder attaching device to attach one end of the cross beam between two adjacent rungs of a conventional roof ladder suspended from the peak of the roof. The other end of the cross beam is provided with a roof attaching device for suspending that end from the roof itself. Each of the ladder attaching device and roof attaching device is secured to a respective end of the cross beam by a mounting block, which is juxtaposed adjacent a mounting plate positioned in the hollow interior of the respective end of the cross beam.

Abstract: A suspension ladder comprises a string of identical rigid rectangular sections (1) which are hinged together about a series of parallel axes adjacent their longer rear edges (2), and each of which has one or more apertures (11) forming a rung of the ladder. Each section (1) has a trapezoidal cross sectional profile providing the section with sloping top and bottom edge faces (4) and (5) which converge towards the front face (6) from the longitudinal rear edges (2) and form stops which limit the extent to which adjoining sections can pivot towards each other in a forward direction. The ladder therefore cannot be flexed in this direction beyond a predetermined minimum radius of curvature and will therefore form a substantially rigid cradle (21) when its lower end is lifted while its upper end is suspended. In contrast adjacent sections can pivot flat against each other in the rearward direction so that the ladder can be rolled up tightly for easy storage.

Abstract: My invention relates to an extensible stairway capable of being shipped in a knockdown condition and erected with a minimum of labor and without special tools. The stairway has a pair of stair step stringer assemblies each stringer assembly having a pair of telescoping channels nesting slidably together that can be extended to a required height. The vertical load bearing side walls of said channels are provided with a series of registering groups of equally step spaced in-line bores arranged to lie in a substantially horizontal line when the stringer channels are placed in stair inclined position. A plurality of stair step assemblies having tread supports are adapted to be swivably mounted and clamped to said groups of in-line bores to maintain the treads in a horizontal position when the stringers are inclined forwardly to an ascent angle. A rotatable bracket is located at the upper end of each of the inside channels enabling them to be mounted in an inclined position to the upper level of a structure.

Abstract: A gutter protection device for preventing damage to an eaves-mounted gutter against which a ladder is leaned. A polyethylene foam block forms the body of the device. A semi-circular recess in one face of the body can be fitted on the lip of the gutter. A pair of pins which project from the body into the recess are then hooked behind the gutter lip to mount the device on the gutter. A bearing surface of the body has a pair of slots which receive the legs of the ladder. One slot closely receives the leg of the ladder to assist in preventing sideward sliding of the ladder. The other slot is oversized so that it can receive the legs of ladders having various sizes.

Abstract: A boat ladder for boarding an inflatable pontoon boat, dinghy or similar small craft of the type having opposed generally parallel gunwales. The ladder has two generally parallel ladder supports, each with a first end bendable across one of the gunwales. Plural and parallel ladder steps extend between the two ladder supports and a strap is coupled at one end to the first end of both of the ladder supports. The strap is dimensioned to extend across the space between the gunwales. A hook extends about the second gunwale for coupling the other end of the strap to the other gunwale, whereby the weight of a person climbing up the ladder is distributed relatively evenly across both the gunwales.

Abstract: A removable ladder for placement over the side of a boat and extension into water for aiding ingress and egress of swimmers and the like is disclosed and includes a pair of elongated, generally parallel extending upright members terminating at respective first ends in boat engaging hooks with a series of cross members extending generally parallel to one another and spanning the upright members to form a sequence of steps. Each step may comprise a pair of laterally displaced cross members and the boat engaging hooks may be formed as a pair of generally orthogonal projections one extending parallel to and displaced from the direction of upright member elongation while the other extends generally parallel to and displaced from the step forming cross members so that the hooks may be positioned behind upright portions of the boat railing to secure the ladder in place and obviate the need for handrails on the ladder, since the railing upright portions may be used as handgrip regions when using the ladder.

Abstract: A removable and adjustable ramp for aiding an animal or human into a small boat from water in which the boat is floating comprising an inclined planar member removably attached to the vertical wall portion of a small boat and extending into the water with an integrally associated platform wherein said platform is disposed in a substantially horizontal position when said inclined planar member is touched by a forward portion of the animal or human to accommodate a rearward portion of the animal or human to ease access of the animal or human onto the boat without external aid. The ramp is adjustable to accommodate various sizes and weights of animals and humans. The ramp is lightweight, portable, and may include additional access aids such as indentations and low slip surfaces on the ramp.

Abstract: A ladder for firefighters having spread apart upper rails to provide clearance and a working space for them to chop an opening in the roof of a burning house to enable smoke to escape and otherwise aid in eventually extinguishing the fire. The ladder includes a pair of side rails spaced apart the normal distance as in conventional ladders, but the upper portion of each side rail includes two hinged sections, the first hinged to swing outwardly to a position at a right angle to the lower portion of its respective side rail, the second hinged to swing upwardly to a position at a right angle to the first hinged section to which the second hinged section is pivotally connected by a hinge member. Pins or other lock means are provided to hold the hinged sections in the spread apart working position of the ladder. The upper free end of each second hinged section of each side rail includes a hook to hook over the peak of the roof, the ladder lying against the pitched side of the roof.

Abstract: The invention relates to a portable emergency fire escape ladder comprising a large double hook adapted to fit over a window ledge, tubular steps suspended by means of galvanized steel cables, the steps secured on the suspension cables by means of pressed steel rings. The tubular steps are slightly larger in diameter at one end than the other allowing the steps to join together to form a pole. There is a connecting rod under the double hook for the attachment of the top tubular step in the pole position. The double hook has a curvature at the lower end in order that the tubular steps may be spaced a distance from the wall to allow room for the person's foot. The double hook is provided with a pull cable which is strung through the frame of the double hook, to the end pieces, so that pulling on the cable will release the double hook from the window ledge allowing a person down the wall.

Abstract: A ladder including upstanding opposite side rails and vertically spaced rungs extending and mounted between the side rails is provided. A pair of screw shafts extend along and are journalled from the side rails and elongated guides are mounted from and extend along the upper end portions of the side rails. A pair of followers are guidingly engaged with the guides for movement therealong and the screw shafts are threadedly engaged with the followers. The lower ends of the shafts include structure for inputing rotary torque thereto and the followers include laterally outwardly projecting arm portions disposed generally normal to a plane containing side rails of the ladder.

Abstract: A ladder for a truck box comprising a bracket assembly adapted to be placed over the upper edge of the truck box having a ladder assembly pivotally secured at its upper end to the bracket assembly so that the ladder assembly will remain vertically disposed regardless of the inclination of the truck box. The ladder assembly comprises an outer frame assembly pivotally connected to an inner frame assembly so that the outer frame assembly may be pivotally moved from an inoperative position closely adjacent the inner frame to an operative position wherein the outer frame is spaced outwardly of the inner frame. Steps pivotally interconnect the inner and outer frames.

Abstract: A ladder which can be used as either an extension ladder or step ladder or stool, and which includes a pair of slidingly telescoping, selectively extendable ladder sections. An interconnecting pedestal subassembly is provided and is adapted for detachable engagement with the side rails of the ladder sections. The interconnecting pedestal subassembly can be interchangeably used to form a ground engaging braking skid or a window hook when secured to one or the other of the ladder sections.

Abstract: The safety attachment includes a flat strap base member and a clamp thereon to detachably mount it on the top rung of a ladder. A pair of curved horns are pivoted on the ends of the base member, the horns being curved to fit around the tree against which the ladder is put, and with teeth on their concave sides to bite into the tree. The horns have diverging extensions at their outer or swinging ends which act as camming elements in applying the attachment to the tree. A chain interconnects the horns, which rests against the tree, and a tension spring also interconnects the horns. The horns have inner extensions extending oppositely beyond the pivot axes, and a pull rope interconnects these extensions and reaches the ground, which the user can pull for swinging the horns away from each other and releasing them from the tree.

Abstract: A ladder is provided with an attaching device at its top end whereby it can be quickly and securely attached to a vertical pole, tree-trunk or the like. The attaching device comprises a pair of jaws to pass one on each side of the vertical pole, and it can pivot until the jaws engage the pole. The ladder is suspended from the pivot of the attaching device, and may then be secured at its bottom end to prevent it from swinging.

Abstract: A ladder attachment consisting of two triangular plates with holes and connecting rods. When connected through the rungs of a conventional extension ladder it forms a frame on the outsides of the ladder that can be adjustably extended over the ridge of a roof.The attachment allows the ladder to conform to the roof's pitch and be secured to the roof's ridge.

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: A fitting for a ladder including a pair of brackets releasably attached to the ladder legs and including a pair of downwardly directed hook portions and associated parts that are sized to be seated in a gutter. The brackets are connected by a crossbar and in a second mode of operation a non-skid, resilient faced member is attached to the crossbar. Thus the resilient faced member can be used against aluminum siding and the like to distribute the weight and thus avoid damage to the exterior wall of the building.

Abstract: The present invention entails an emergency escape ladder that can be used to descend from one level of a building downwardly to another level, after which the ladder may be repeatedly repositioned for descending on downwardly in a like manner. Functionally the emergency escape ladder includes a plurality of treads interconnected by a pair of flexible tie lines in the form of chains. Because of the flexible chains, the emergency escape ladder may assume an inoperative position where the same can be folded and stored in a compact area. Further, the emergency escape ladder is provided with a plurality of stabilizing bars that are secured together in end-to-end relationship, with said treads sandwiched therebetween. When the stabilizing bars are interconnected between treads, the ladder assumes an operative mode or position where the same is elongated and generally rigid.

Abstract: A portable chinning apparatus comprising a horizontal chinning bar interconnecting two posts of adjustable length. The posts are suspended from a pair of inverted U-shape brackets which fit snugly over a length of nominal two inch lumber as in a garage rafter.

Abstract: A ladder attachment for securement to a ladder leg which can function as a ladder standoff, ladder leg extension or roof ridge hook. The ladder standoff arrangement permits the ladder to be supported a predetermined distance from a wall, enables the ladder to be used as a scaffold, or provides a support for a work table or sawhorse.The attachment comprises a channel having an adjustable web and sidewalls with a reversible angle secured to one sidewall which cooperates with biasing means passing through the channel web and a ladder stile to frictionally lock an elongated member passing through holes formed in the sidewalls as a standoff or roof ridge hook or to frictionally lock an elongated member adjacent a ladder leg as an extension thereof.

Abstract: A roof skid including a floor supported above the ridge of a roof and resting thereon, with edge support devices extending from the frame and interlocking at chosen positions on a foot member resting on the surface of the roof, with ladder roof jacks depending from rails of the skid on which scaffold carriages are slidably attached along the ladder length.

Abstract: A clamping member and a holding member adapted to be positioned on opposite sides of a ladder adjacent the top thereof extending in a direction perpendicular to the ladder and clamping means for clamping the ladder between the clamping member and holding member whereby the ladder may be positioned and held on a peaked roof or the like.

Abstract: A lightweight ladder includes a vertical member of flat sided tubing, rungs formed of angle metal, and ladder feet adapted to engage retaining clips mounted on a vertical structure. The ladder feed are designed to provide wedging between the clips and the vertical structure such that set screws are not required to keep the ladder in place and stable.

Abstract: A safety device for ladders to prevent slippage when placed against a tree or pole is disclosed. Means for gripping the tree is connected to a holding member A and lies generally perpendicular to the rungs L of the ladder. The holding member A is rotatably fastened to the top rung of the ladder for rotational movement about a longitudinal axis of the rung. In a preferred embodiment, the gripping means comprises a plurality of sharp teeth B disposed along the side edges of the holding member A. The holding member A is arcuately shaped for conforming engagement with the tree when the tree has such a small diameter that the teeth B do not engage the tree. In another embodiment, the holding member A is rotatably fastened to an elongate member C. The elongate member C is then fastened to the side rails I of the ladder generally parallel to the rungs L.

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: A ladder securing device which comprises two connectors for attachment to the runners of a ladder. One of the connectors includes a first rotatable element on which is mounted a second rotatable element. The elements are rotatable about axes which are at right angles to one another. A curved metal band is attached to one of said elements and the other connector includes an arrangement such as a locking pin for releasably securing the metal band to it. The arrangement of the first connector is such that the band can pivot about the two axes.

Abstract: A step-ladder is provided with one or more hooks on one or both of the ladder's stanchions, with the hooks adapted to engage with corresponding horizontal, standing, or inclined members carried by a fixed structure. The hooks, which may also be telescopic, are vertically and perpendicularly displaceable with respect to the normal position of the step-ladder and each hook is independent from the other in order to permit their regulation or adjustment in height and direction of orientation.

Abstract: A ladder attachment including an adjustable frame assembly detachably connected to the end of a section of a conventional extension ladder, the frame assembly cooperating with the side rails of the ladder to form a hook portion for extending over the ridge of a pitched roof to thereby allow the ladder to be supported in an inclined position on the roof.

Abstract: This invention relates to a device for attachment to ladders which will enable them to securely anchor to the peak of a roof quickly and easily, while increasing safety for firemen cutting ventilation holes near the peak of the roof. The attachment for roof ladders allows the firemen to stand on a support directly below the roof area where the hole is cut. The invention can be folded into a compact bundle for storage and transportation, and is light in weight.

Abstract: An improvement in portable scaffold assemblies which enables a scaffold to be securely hung upon a vertical portion of the building, without the need for permanent anchoring means, either on the building or on the scaffolding frame itself. The portable scaffold assembly is preferably constructed of square tubing, with a main pair of open-ended vertically extending tubular members comprising the main structural member for a permanent walkway, and also for hanging an auxillary walkway, therebelow. The scaffold may be positioned, in a vertical sense, very close to the top of the vertical building portion which supports the assembly, or telescoped downwardly therefrom to any desired extent. This is allowed by a pair of L-shaped upper arms which telescopically engage both the main scaffold holder assembly, and also the removable L-shaped anchors, which are movably fitted against the vertical supports of the building structure.

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: A portable observation stand mountable to a tree. A ladder includes a plurality of tubular sections pivotally interconnected. A platform pivotally mounted to the top of the ladder is abuttable against a tree and secured thereto by a chain having a first end attached to the platform with the chain then extending around the tree to a hook pivotally mounted to the platform. Means are provided to tighten the chain. Temporary erecting means mounted to the stand secures the platform in a horizontal position until the chain is tightened.

Abstract: An anchor is provided for securing the upper extremity of a bunk ladder to an elevated support. A bracket is attached to the upper extremity of the ladder and has a configured hook extending downwardly and outwardly. A socket attached to the overhead support has an overhanging lip and a shoulder located therebeneath and spaced therefrom. The bracket hook is inserted between the lip and shoulder which together vertically immobilize the bracket and prevent withdrawal of the bracket hook therefrom when the foot of the ladder is in a supporting position.

Abstract: There is provided the combination of a frame and a collapsible ladder. The frame defines two spaced-apart horizontal passages in which catch elements are mounted. Resilient means urge the catch elements toward each other, and manual thumbscrew means are provided to pull the catch elements away from each other. A collapsible ladder has attachment means at the top by which it can be anchored, and the ladder also includes a containment means constituted by the bottom rung and two upstanding side members which register with all of the remaining rungs. The upstanding side members have openings at the top into which the catch members extend when in their innermost positions. Manual release is possible by which the side members become disengaged from the frame, thus allowing the web ladder to fall into a position of use.

Abstract: A portable, extensible ladder is disclosed of the type having a plurality of sections sliding into each other. The normally uppermost section is provided with hook for suspending the ladder from a window sill or the like. The same, normally upper section is provided with winch and brake means for controlling the extension of the ladder by gravity by operating same from the top end thereof. The lowermost section is provided with support wheels facilitating the manipulation of the ladder over obstructions such as a lower window sill or the like as the ladder is being extended. The ladder also has means for locking same in an extended state, whereby the ladder becomes generally rigid to facilitate handling from the bottom end. The ladder is particularly suitable as a portable fire escape ladder but has many other applications as well.

Abstract: A ladder intended for use in boarding small boats has side rails and treads interconnected by integral and precut joint elements designed for ready connection and disconnection. The connected treads and rails are suspended from the deck or side of a boat by crank-like hangers pivotally and releasably secured to the side rails and having grooves enterable by one of the treads. Anchoring members on the hangers engage corresponding fittings permanently secured to the boat to suspend the ladder over the side of the vessel. One of the treads has braces which engage the sloping side of the boat to keep the ladder rails generally vertical.

Abstract: A foldable ladder having a plurality of rigid steps and of rigid links which steps and links are pivotally secured together with pivot pins to result in a rigid ladder in use, but capable of being folded for storage.

Abstract: A bunk bed-ladder arrangement wherein the upper end of the ladder is equipped with C-shaped hook members which straddle the bunk bed rail, the hook members having aligned openings for insertion of screws to secure the hook members to the ladder and the bed rail being equipped with a bracket having a detent fitting into an opening for stabilizing the ladder in position.

Abstract: A bracket for mounting a bunk bed ladder from the bed rail of an upper bunk bed which engages both the top and inner bottom edge of the bed rail to prevent the bunk bed ladder from being accidentally lifted off and disengaged from the bed rail, to prevent the ladder from shifting along the bed rail, to reduce twisting of the rail and strain on the post or leg of the bunk bed, thereby reducing failure of bed rails, bed posts, and the ladders, and to prevent the ladder from tilting outward while climbing.