Abstract: A telescopic boom is disclosed having a plurality of generally tubular boom sections each having its corners defined by angled corner plates converging upwardly and inwardly at equal angles relative to a central vertical plane containing the longitudinal axes of all boom sections when properly aligned. Boom shoes secured to the outer surfaces and near the inner ends of the angled corner plates of all boom sections except the largest section slidably engaging the adjacent angled corner plates of the next larger boom section; and similar boom shoes secured to the inner surfaces of the angled corner plates near the outer end of all boom sections except the smallest section slidably engaging the outer angled surfaces of the next smaller section.

Abstract: An extendible brace or dunnage bar for stabilizing cargo items within the interior of a cargo transport vehicle, the invention provides a simple, reliable and inexpensive device capable of rapid positioning relative to an object which is to be braced against movement. In a first embodiment, an elongate bar is received within a rectangular casing and is provided with spur-like elements on the free end of the bar for engaging an interior wall of a freight car. The rectangular casing is provided with a threaded collar which receives a threaded rod displaceable longitudinally of the elongate bar to cause extension or contraction of the brace on rotation of the rod. The rod terminates at its free end with a freely mounted foot plate adapted to engage a freight car wall opposite the first-mentioned wall or a surface of a cargo item itself, the rod being rotated to mount the brace therebetween through use of a tool such as a wrench in engagement with a nut permanently joined to the rod adjacent to the foot plate.

Abstract: A multi-section hydraulically operated telescoping crane boom includes a manual fly section which may be safely extended and retracted, securely latched in the extended position and pin locked by remote operation of a biased hydraulically powered latching plunger and a biased cooperative hydraulically powered locking pin both embodied in a static pressure hydraulic circuit which includes a pressure-responsive indicator to indicate when the latching plunger is engaged. The circuit also includes safety interlocks for the cooperative latching plunger and locking pin preventing their operation in improper sequence.

Abstract: A suspended roof construction for industrial furnaces is disclosed having carrier bricks of generally rectangular configuration with a hanger recess in one side and shoulder means extending from the upper portion of sides adjacent the hanger recess for support of filler bricks. Thus, a single hanger suspends two carrier bricks which in turn support four filler bricks. Such assemblies of bricks may be fabricated into panel units which provide telescoping tubes on at least one end of hanger tubes for suspension of end bricks between adjacent panel modules. The telescoping tubes may be retracted, the panel unit lowered into place between the structural frame of the furnace roof, the telescoping tubes extended and filler bricks hung from cross bars at each end of the panel unit to fill the spaces between adjacent panels.

Abstract: A longitudinally extendible, segmented boom structure includes a plurality of hollow, substantially V-shaped segments which are pivotally connected to adjacent segments for storage. A series of load-bearing cables extend through the segments for carrying loads. The segments have uniform cross-sections and progressively increasing lengths. Segments are stored in rolled-up form on a reel by pivoting the segments to form a coil of nesting segments. Each segment has laterally extending side flanges through which longitudinally extend the pre-tensioned load-bearing cables. The cables pass through the flanges on opposite sides of the boom segments for supporting vertical loads and resisting side loads on the boom. A second set of auxiliary cables on the underside of the boom is automatically payed out as the boom is extended. The auxiliary cables prevent the extended segments from collapsing when inverted.

Abstract: A metal stud assembly is disclosed for use in either drywall construction or as intermediate studs in demountable walls. The stud assembly includes a U-shaped stud member and a U-shaped stud extension which telescopes into one end of the stud member with a resilient-type of interference fit which produces a controlled resistance to relative axial movement and eliminates possible looseness. The stud extension is provided with angulated tabs which snap into a channel-shaped ceiling track to lock the stud extension therein. The lower end of the stud fits into a channel-shaped floor track to secure the lower end of the stud assembly in place. The stud assembly is sufficiently flexible to allow the lower end to be twisted through about 90.degree. to position the narrow dimension thereof crosswise with respect to the floor track for easy insertion. After insertion, the stud assembly is returned to the untwisted position to complete the installation.

Abstract: A multicomponent extendible structure which includes three elongated sheets of material which each have two long edge portions and connecting means located on the long edge portions for connecting adjacently located long edge portions together when the adjacently located edge portions are in a substantially nonbent condition and for permitting the long edge portions to be separated when the long edge portions are in a bent condition. The connecting means includes a series of alternating projections and slots located on each long edge portion and the projections on the long edge portion of one elongated sheet of material are adapted to be received by the slots on an adjacently located edge portion of another elongated sheet of material. The long edge portions are readily separable to permit the elongated sheets of material to be separated and stored when the multicomponent extendible structure is in its stored or non-extended condition.

Abstract: An anchor assembly for supporting an insulation panel or blanket on furnace walls which includes an extension member adapted to be fastened to an existing anchor member in order to extend the length of the anchor assembly to accommodate insulation of greater thickness. The extension member has attaching means which engage notches in the existing anchor to hold to extension in position. Different species of the attaching means are disclosed.

Abstract: Pipes for a telescopic mast have at least three guide grooves along their entire length, this is with the exception of the inner pipe having the smallest cross-sectional area which may not have guide grooves. All pipes except the pipe intended to be the outermost one in the telescopic mast have guide blocks attached to the lowermost portion of their outside. All pipes (4) except the pipe (4) intended to be the innermost one in the telescopic mast have guide blocks attached to the uppermost portion of their inside.

Abstract: In a four-post merchandizer, two light-gauge sheet metal corner posts are reinforced against twisting by a dual camming action by which the two posts are urged tightly against the corners of the shelves. Each post comprises two telescoping post sections, and a unitary coilable, flexible trim sheet, received in grooves formed in the post elements, and extending from one end of the post to the other. The posts have a W-shaped horizontal cross-section, in which a pocket is formed for receiving the ends of shelf hooks, thereby protecting the flexible trim from damage. Base panels are secured together by sliding a first flange of one panel into a pocket formed by second and third flanges of another panel and two perpendicular surfaces of a post. By tapering the ends of the first and third flanges, the entry of the first flange into the pocket can be carried out without careful initial alignment.

Abstract: A mobile house support system is described which provides an adjustable foundation for mobile homes which is resistant to earth movements such as is caused by earthquakes and to high wind forces. The support system unitizes a double wide mobile home by securing each section of the structure to the support members. Multiple I-beams are secured at right angles to the main support structure of the mobile home, a plurality of adjustable legs are carried by the support beam and connected to the main support structure of the mobile home and bearing blocks support the legs.

Abstract: A high-strength light-weight hollow boom section for a multi-section telescopic crane boom comprises a top wall, a bottom wall, and a pair of lateral walls, each lateral wall being located between the top wall and the bottom wall. Each of the four walls comprises a pair of spaced apart longitudinally extending members, a relatively thin plate extending between, overlapping and welded to the pair of longitudinal members, and a plurality of longitudinally spaced part transversely extending stiffeners of U-shaped cross-sections, each stiffener being welded to the plate and to the pair of longitudinal members. Each longitudinal member of a lateral wall is in edge-wise abutting relationship with and welded to the surface of a longitudinal member of one of the top and bottom walls. Each stiffener of a lateral wall also has its ends in abutting relationship with and welded to the surface of a longitudinal member of the top and bottom walls. Novel slide pad arrangements are also disclosed.

Abstract: A multisection hollow telescopic boom comprises a base section, an intermediate section and a fly section. A first elongated rotatable screw located within the boom has its base end rotatably mounted on the base end of the base section and engages a first nut which is rigidly mounted on the base end of the intermediate section. A second elongated rotatable screw located within the boom has its base end rotatably mounted on and connected to the base end of the intermediate section and engages a second nut which is rigidly mounted on the base end of the fly section. A screw drive rotates the screws to effect axial telescopic movement of the boom sections. In one embodiment the screw drive comprises a single motor for driving the first screw, a first sprocket rotatably driven by the first screw, a second sprocket for rotatably driving the second screw, and a drive chain connected between the sprockets.

Abstract: To reduce the weight and increase the lifting capacity of a multi-section telescopic crane boom, a single hydraulic cylinder for the full extension and retraction of individual boom sections is anchored in the relatively stationary boom base section. A sled structure surrounding the single cylinder and moving therewith has guided engagement through plates fixed to the movable boom sections at or near their rear ends. Driving finger mechanisms on opposite sides of the sled are biased toward driving engagement with the plates of the movable boom sections and are retractable into chambers of the sled. A cooperative locking pin operating assembly for the movable boom sections is fixed on the forward end of the boom base section and includes power retracting devices which operate mating retracting cranks and locking pin sets individual to the movable boom sections when the retracting cranks are aligned beneath the power retracting devices.

Abstract: A window insulation device is disclosed for interior installation. The device comprises at least two tubular sections, and at least one male and one female section. The male and female sections are adjustably fitted for tight reception between the window sill and window frame.

Abstract: This invention relates to a supporting structure to support a soffit, comprising at least two parallel spaced vertically disposed props connected together by a horizontal member, each prop being provided with a supporting head which supports the primary shoring beam for supporting the soffit. The beam extends between the props, one end being fixed longitudinally of the beam and the opposite end being variable longitudinally of the beam, two or more adjacent beams being telescoped one within the other.

Abstract: A support for supporting ceiling panels in a space having two non-parallel walls, including at least two channels arranged parallel to and spaced from each other, at least two telescopic channels respectively received in the two channels in a plurality of positions to vary the length thereof between the two non-parallel walls, and at least two panel holders supported on the two telescopic channels. The position of the respective panel holder may be varied along the telescopic channel so that ceiling panels may be suspended therefrom so that the space between the non-parallel walls can be essentially evenly divided by the appropriate distribution of the ceiling panels to thereby reduce the appearance of non-parallelity of the walls and ceiling panels.

Abstract: An improved telescopic boom for a truck mounted hoist in which at least the middle telescoping section of the boom is fabricated from I-section structural steel having a central web, and upper and lower flanges, the flanges having inwardly facing surfaces lying in angled planes which are not normal to the plane of the web, and in which the trolley and fixed portion of the boom are fabricated of any other suitable structural material, and having at least two sets of identical rimmed wheels, one set mounted directly on the fixed section, and the other set mounted directly on the trolley, without the use of tilting arms, the two sets of wheels riding in opposite sides of the I-section material of the telescopic intermediate section, with the tread of the wheels carrying the load and with the rims providing lateral guidance thereby dispensing both with the mounting arms and with the lateral guide rollers.

Abstract: A hydraulically extensible crane boom includes a plurality of mutually innernested, telescopically associated inward and outward boom sections. Each section is made up of a pair of longitudinally extending, parallel, spaced apart upper structural shapes of substantial mass and strength, a relatively light top web integral with and extending between the upper structural shapes, a pair of longitudinally extending, mutually parallel, spaced apart lower structural shapes of substantial strength and mass, a relatively light bottom web integral with and extending between the lower structural members, and a pair of relatively light side webs each connected between one upper and one lower structural member. The distance between the lower pair of structural members is less than the distance between the upper pair of structural members.

Abstract: A centering for casting concrete roofs comprising a rectangular steel construction including at least two longitudinal girders (1, 2) and a plurality of spaced cross beams (3) welded thereto constituting a support of a flat form board for casting. According to the invention, each one of said cross beams (3) is provided, at least at one end of the centering, with an extension arm (9) which can be moved lengthwise of the cross beam to adjust the total width of said steel construction so that it may be adapted to meet the requirements of supporting form boards with varying widths (FIG. 1).

Abstract: An extendable column consisting of a plurality of axially elongated rigid structural sections nested within one another. Each section includes a plurality of screws running the length thereof and rotatably attached therein. The next inner section includes threaded lugs oriented to threadingly engage the screws thus resulting in extension or retraction of the column upon rotation of the screws. The screws of each section are selectively rotated by a motor and an engagement mechanism.

Abstract: A hoist device is pivotally attached to a specially adapted rear bumper of a conventional pickup truck. The hoist comprises a generally yoke-shaped frame adapted to wrap around the rearmost ends of the truck's cargo bed such that the hoist, when not in use, will not substantially interfere with the use of and access to the cargo bed.

Abstract: A structure is provided for adjusting the lateral displacement of an outer second boom relative to a first, or base boom which receives and supports the second boom for telescoping movement relative thereto. A box-like retainer structure is provided to receive a pair of wear blocks which project from the retainer structure on each side of the second boom and are adapted to slidingly engage the inner surface of the sides of the base boom. A pair of threaded adjustment blocks are provided, one block inwardly of and adjacent each wear block for retaining the wear blocks against the base boom. Each adjustment block is threadingly engaged with a separate bolt and the distal end of each bolt opposite the adjustment block is retained within a bore of an upstanding wall to prevent each bolt from moving laterally relative to the second boom but to permit rotation of the bolts.

Abstract: A hydraulically operated mine prop made of light metal, comprises an outer prop portion and at least one telescopic inner portion with at least one of these portions being provided with a non-sparking and impact-resistant metal covering. The covering may, for example, comprise steel, and an insulating layer is advantageously provided between the covering and the prop portion with which it is associated. The thickness of the covering is advantageously made from 0.2 mm to 0.6 mm.

Abstract: Components of retractable beams and assemblies thereof in which the interlocking members of each component, which are primary elements in the composition of the beams, have an elastic capacity which is controlled by the restraining members which form closing knots for the interlocking assembly. Many applications utilizing said components and assemblies are described.

Abstract: A section for a telescopically extensible crane is octagonal in cross-section. The section has relatively thick upper and lower parallel plates, and side members each having a part inclined outwardly for each of the upper and lower plates and a central part generally perpendicular to the upper and lower plates. The central part of each side member may extend over more than half the height of the boom section and the inclined sections may be of differing lengths and thus inclined at different angles to the respective upper and lower plates. Preferably, the lower inclined sections are shorter than the upper inclined sections. The boom section may be reinforced by external belts, or by internal support plates.

Abstract: A large light-weight telescopic crane boom comprises a plurality of relatively movable boom sections, such as base, intermediate, outer, and fly sections, and each section comprises top and bottom walls and a pair of spaced apart side walls. In each pair of relatively movable adjacent boom sections wherein one (inner) section is telescopically receivable within another (outer) section, the inner surface of the side walls of the outer section and the outer surface of the side walls of the inner section comprise longitudinally extending corrugations or projections which interengage and whereby the inner section is slideably supported on the outer section. The corrugations or projections on each wall surface are arranged in two (upper and lower) sets, one above and the other below, the longitudinal neutral axis of the crane boom.

Abstract: The invention is concerned with a drop-head support assembly for use with builders scaffolding and is directed to an assembly comprising an upright pillar, a shuttering support member slidably mounted on the pillar, and a wedge device pivotally attached to the pillar to be moved between a horizontal position where it supports the support member and a vertical position where it releases the support member. The upper end of the pillar may also be adapted to receive a detachable head plate device.

Abstract: Adjustable side shoe assemblies are provided on respective side walls of adjacent movable boom sections of a crane boom assembly to maintain alignment between the sections. A boss provided on each side wall at the upper end of a movable boom section of a crane boom assembly has a tapped hole passing through the section. A threadable member, preferably composed of a phenolic or other abradable material can be inserted into the threaded opening provided in the side wall of the boom section, the member being threadably rotated into the opening to engage the side wall of the next adjacent boom section. Respective aligned openings provided in the side walls of the boss and the threadable member receive a retaining member, such as a cotter pin, to hold the threadable member in place on the boom section.

Abstract: A multiple section mast having telescoping modular sections adapted to be erected at remote land sites or on offshore platforms by small capacity cranes. A separate lower mast section having an open side is first placed in vertical position on a substructure. A separate upper mast section is moved horizontally into the lower mast section then elevated vertically to extend above the lower mast section. A separate intermediate mast section having at least part of one side open is then moved horizontally into the lower mast section and fastened to the lower end of the upper mast section. The upper and intermediate mast sections are then simultaneously elevated until the lower end of the intermediate mast section can be fastened to the upper end of the lower mast section. Retainer means removably attached to the lower mast section extend into the open side engaging the upper and intermediate sections as they are telescoped.

Abstract: A collapsible module comprising an upper and lower member disposed in an opposite relationship to each other, each of said members comprising a base plate or frame with a plurality of side plates or frames hingedly connected at their proximal end thereto, the distal end of the side plates or frames of the lower member being hingedly connected to the distal end of the side plates of the upper member.

Abstract: A tilt-up wall panel in raised position is braced with panel brace assemblies, and the panel brace assemblies are braced with a pair of knee brace assemblies for each panel brace assembly, to form a tripod-like structure which eliminates the need for the conventional lateral bracing of the panel brace assemblies. The knee brace assemblies are connected to the wall panel, and for that purpose, two knee brace assemblies extending laterally between a pair of spaced apart panel brace assemblies include a connector common to both and which is connected to the wall panel. A preferred connector includes a base plate adapted to be connected to the wall panel, and a pair of swivel means mounted on one side of the base plate and each forming part of one of the latter two knee brace assemblies.

Abstract: A multi-purpose, extruded metal, joist-like, structural member which is designed for use in connection with concrete formwork, the member being generally of I-beam configuration and having associated therewith novel facilities whereby its effective length may beextended in small increments or it may be spliced to adjacent similar members by utilizing either lumber or novel extruded metal extension members of special design.

Abstract: The invention relates to a fabrication process of a metallic structure made of sheets welded one onto the other and enclosing an internal space. A scaffolding is erected in this internal space and comprises a vertical tower and collapsible passageways extending radially from said tower. When the structure is substantially terminated, the passageways are collapsed and the scaffolding is withdrawn from said space through an aperture provided at the upper part of the structure.

Abstract: The telescoping elements of an extensible rod may be coupled sequentially to a coaxial, partly threaded spindle by respective internally threaded coupling members, each element being drivingly engaged with the spindle by a previously engaged, abuttingly coupled element. A yieldably resilient mounting for the coupling member or for one of two cooperating abutment members permits smooth engagement of the spindle threads with the coupling members.

Abstract: A multi-section telescopic boom has sections with reinforced I-beam side walls and top and bottom walls made up of truss members. The trusses and beam stiffeners are disposed interiorly of the beam flanges so that the flanges provide continuous upper, lower and side bearing surfaces engageable with wear pads all of which are on the next outermost section. The lower and side wear pads are elastomer backed and the side pads have backup buttons that can easily be shimmed out to compensate for wear.

Abstract: This invention relates to a method of and apparatus for erecting a vertical mast.In the invention a mast balanced by tensioned guys is erected while maintaining the guys in their tensioned condition.

Abstract: The cross rail and support includes a pair of telescopically engaged cross rail sections each having a ribbed top wall, and a pair of longitudinally ribbed side flanges, each terminating in an upwardly and inwardly directed reinforcing edge portion to provide a sturdy telescopically engaged cross rail member that has support legs attached to laterally outer portions of the support.

Abstract: An improved boom section has top and bottom walls formed of sloping plate sections or flanges which define peaks between the side walls. The peaked configuration of the bottom wall increases the buckling strength of the bottom wall over the bucking strength obtained with a flat bottom wall. The sloping flanges of the top and bottom walls are disposed at acute angles of between 12.degree. and 19.degree. to horizontal planes. If the slope of the flanges is increased to an angle significantly greater than 19.degree., the peaks in the top and bottom walls would be disposed relatively far from the central axis of the boom section and would be subjected to excessive stresses upon loading of the boom section. The boom section is advantageously formed with a height-to-width ratio which is greater than 1 and less than 3.

Abstract: Apparatus constituting a grill for use as a gate, door, window or the like, adjustable for fitting upon a frame to cover an opening.

Abstract: A particular arrangement of web stiffening members for the extensible and retractable telescoping sections of a crane boom assembly. A series of web stiffening members are secured to each of the side webs of a telescoping boom section, the web stiffening members being angularly displaced in a particular arrangement on each boom section to provide for reduced stress levels in the section. The web stiffening members are arranged on each side web in two series of members, the innermost stiffener of each series being reversely positioned about a reference point provided on the boom section. The reference point for the boom section corresponds to the point of changeover for shear load for the section under cantilever loading.

Abstract: Spaced panel bearing studs are vertically arranged to receive and support panel members defining a wall surface. The studs are maintained in a spaced apart relation by detachable spacer bars extending therebetween and releasably engaged therewith. The panel members can be adhesively secured to the studs or mechanically secured in place by separate batten strips or by skirt portions formed integral with the panel members. The batten strips and skirts are each provided with tongues having enlarged formations interlockingly engagable with clips detachably mounted on the studs. Axially adjustable extender clips are insertable in the upper ends of the studs for connecting the studs to ceiling channel members.

Abstract: A light post which serves as a structural member and has upper and lower adjustable connections comprising end caps which are securable to a base and supported structure, respectively, and between which the post extends and telescopes at its ends into the caps. The post is provided with axially extruding bolts which thread through respective end portion of the post and are extensible and retractable endwise to position the post and also lock a cover panel in closed position and in which parts are temporarily distortable to facilitate securing and release thereof.

Abstract: A reusable, longitudinally adjustable, readily removable form support member for supporting a concrete construction form in an array of structural members in a building construction. In one embodiment the form support member comprises a spanning member having laterally translatably support pin members secured in recesses in opposed ends of the spanning member for engaging openings in adjacent structural members. The support pins may be movable in a horizontal plane so as to permit their alignment with the structural openings where necessary. The support pin members include block means attached to the rear portions of the support pins, the block means cooperating with respective activating means to move the spanning member in a vertical plane so that an inside surface of the respective end parts of the spanning member contacts a surface of the block means and effect a friction bond which prevents longitudinal movement of the respective parts.

Abstract: A plurality of telescopic triangular cross sectioned booms slide within one another so that they can be extended and retracted and they are adapted to support conduits for pumping concrete or other material from one location to another. Angulated flanged corner constructions support the booms for sliding movement one with the other and in one embodiment, wheeled trolleys or bogeys are secured to the corners to reduce the frictional load between adjacent boom sections.

Abstract: An improvement in a modular ceiling tile assembly having a zone occupied by ceiling tile having a curf in at least one side thereof, said zone defined by ceiling tile main runners interconnected by cross members, said cross members having a generally horizontal lip protruding toward said zone, the improvement residing in that at least one of said tiles is engaged by a spline having a generally horizontal base and a generally vertical riser attached to said base, said spline being slotted, said spline being removably connected at at least one end thereof to the generally horizontal lip of a cross member by a movable clip, said clip being disposable over said horizontal lip of said cross member to rest thereon.

Abstract: A lecturer's pointer, or a blind man's stick, is demountable into sections for easy stowing, but the sections cannot be separated since they are permanently connected by an axial cord. Pulling the cord without further guidance, causes the sections to join at spigot and socket joints, designed to minimize shake without binding. The cord is inherently elastic or is sprung and is put in tension to hold the joints rigid by a device on the head of the stick.

Abstract: A hanger for supporting a spanner beam used in the construction of bridge decks and the like. A bracket includes a flat tongue which rests on a girder and opposed side plates which receive one end of the spanner beam therebetween. A camming pin is inserted through opposed openings in the side plates and rotated to become tightly lodged in a supportive position beneath the spanner beam. A Z-shaped accessory plate may be used to support the bracket in an alternative position a short distance below the top of the girder. A leveling mechanism which rests on top of the girder receives the bracket tongue and is adjustable in order to vary the elevation of the spanner beam.

Abstract: A support structure for a flexible cover such as is utilized on a portable enclosure wherein the tip of the supporting ribs or tubes engages the cover to maintain the same in position. The tip which is disclosed in this specification includes a shank section which is telescopically received by the tubular rib and a retaining section passable through a grommet in the cover. The tube is provided with a plurality of apertures and a resilient detent, forming a part of the tip, passes selectively thereinto to restrain telescopic movement of the tip with respect to the tube. The effective length of the rib can be altered by selectively positioning the detent in one of the apertures.

Abstract: A means to maintain the upper wear pads in a multisection telescopic crane boom in contact with the side plates of the circumscribing boom section to reduce the transverse bending moment on the top plate of the boom section, thus reducing the stress thereon, and allowing the use of a thinner top plate so as to provide a lighter and less costly boom structure.