Abstract: A clutch for rigid but releasable connection of two coaxial parts of construction, preferably rotating shafts, having flanges centrally arranged at their proximate shaft ends, in which torque is transmitted by a frontal spur or cog gear. Both flanges are clasped by tension sleeves by means of radially protruding collars. The axial force arises by shrinking the tension sleeves which, in a heated condition, are radially positioned on the flanges. An advantage in connection with Cardan joints is that the external diameter of the clutch is no larger than a cross joint or universal, which can transmit the same torque.

Abstract: Portable sectionalized flooring suitable for a basketball court or the like is assembled from a plurality of separate floor sections arranged in rows with each section composed of interengaged tongue and groove strips defining the floor surface, spaced stringers extending transversely of such strips and an underlayment interposed between the strips and stringers. Each section has at least one end provided with projecting fingers defined by selected strips projecting beyond strips intermediate to these selected strips for the fingers on adjoining section ends to interdigitate and thereby form interlocking finger joints. Groups of the sections are of different lengths to be assembled in rows with the interlocking finger joints of adjacent rows being staggered and latch devices are provided to interlock adjoining floor sections within each row and adjacent rows within the sectionalized flooring area.

Abstract: A separable ski with an interconnecting joint having no snow contacting surface. The joint includes a female connector having an internally grooved socket which receives the tongue of a male connector. An overcenter cam toggle lock carried on the male connector engages a latch hook on the female connector and resides within the dimensions of the ski to securely lock together the separable portions of the ski.

Abstract: A double isolated electrically shielding screen room is characterized in that all of the side, ceiling and floor panels thereof are selectively provided with either male or female configured marginal edges defining tongues and grooves for interconnection of the panels without need for separate shielding strips. Overlapping shielding contacts between connected panels lie in parallel planes and are secured under compression in directions perpendicular to the contacts with great isolation efficiency by outwardly concealed clamping means applied from inside the room assembly, so that floor space around the room is economically conserved. The particular construction minimizes the number of individual elements required for the screen room and facilitates its assembly and disassembly.

Abstract: A rotary cutting tool with at least a first set and a second set of teeth attached to a power router for cutting a joint component consisting of at least two tongues and at least two grooves alternating with the tongues in the end, edge or at the side of a piece of construction material. The distance between the two sets of teeth is equal to the width of the second set of teeth. The depths of the grooves are governed by a spacer positioned between the first and second sets of teeth.

Abstract: A connection coupling or socket arrangement contains two coupling parts each possessing a bore and arranged at an angle with respect to one another. In order to be able to interconnect rods or the like with one another, without the use of further components, the one coupling part serving for receiving one of the rods is continuously lengthwise slotted over the length of its bore. The end regions of this one coupling part bounding at such lengthwise or longitudinal slot each carry a respective portion or section of the other coupling part which is divided into such two portions or sections transversely with respect to its bore. These portions are subjected to the action of a resilient or spring force which strives to mutually shift both of these portions with respect to one another transversely in relation to its bore.

Abstract: In a crane having an upper works rotatably supported on a lower works by an anti-friction bearing, a quick removal assembly structure includes an upper mounting ring affixed to the lowermost portion of the upper works and having teeth extending radially outwardly from the axis of the ring, a lower mounting ring mounted to the uppermost portion of the lower works and having teeth extending axially outwardly along a circle concentric with the center of that ring. The teeth of the upper and lower mounting rings fit snugly together when the upper works is assembled to the lower works, and radially outwardly opening horizontal slots in each tooth combine to define a horizontal retaining ring groove which is concentric with the rings. A retaining ring constituted as four retaining ring segments is of configuration to fit into the retaining ring groove, and when so fitted, prevents relative movement between the upper and lower mounting rings.

Abstract: A material conveying apparatus having a trough assembly for receiving material connected to a tail section. The tail section has a door movable to an open position to facilitate the cleaning of the tail section. An incline section connects the trough section to an elevator section. The incline section has conveyor guide strips that guide a movable conveyor in an arcuate path to the elevator section. The elevator section is connected to a decline assembly having a wear strip for guiding and supporting the movable conveyor. A discharge section is connected to the decline section. The drive for the movable conveyor is mounted on the discharge section.

Abstract: A moving vehicle power distribution apparatus includes power signal and ground signal rails provided along a roadway track including a track switch. As the track switch is moved to pass the vehicle to selected roadway tracks, the signal and power rails can become misaligned and damage current collectors carried by the vehicle that travel along these rails. Coupling members having interdigitated members extend between the rail sections to control the movement of the current collectors as the vehicle travels through the track switch.

Abstract: A ring wedge joint for interconnecting solid or laminated wood sections, such as bar-shaped or rod-shaped sections used as chair parts, tool handles, window frame sections and the like is formed by alternating ring wedges and ring wedge grooves on the end surfaces of the sections to be connected. The ring wedges and the ring wedge grooves on the end surfaces are offset relative to one another so that the ring wedges on one section fit into the ring wedge grooves on the other. Preferably, the opposite sides of the ring wedges converge toward the end surface of the wood sections while the opposite surfaces of the ring wedge grooves diverge toward the end surfaces.

Abstract: A system for connecting corresponding edge areas of adjacent thin-walled bodies. Each edge area is provided with at least one bent notch portion which engages a corresponding bent notch portion carried by the other edge area, such that apertures provided in the notched portions are coaxially aligned to receive a common connecting member for securing the bodies together. A plurality of such notch portions may be spaced along the lengths of the corresponding edge areas to define a series of coaxial apertures through which an elongate connecting member is inserted for securing the bodies together.

Abstract: An arrangement for connecting corresponding edge areas of thin-walled bodies together wherein each edge area is provided with bending sections and empty sections alternately disposed to each other with respect to the corresponding bending and empty sections of the other edge area. The bending sections of the other edge area are disposed through the corresponding empty sections of the edge area whereby the bending sections collectively define a common channel through which an elongate connecting member is inserted to secure the bodies together.

Abstract: This coupling device locks together overlapped lengths of coil-thread rebar by positively interengaging segments of the device with the threading of the respective rebar rods, and positively interengaging the segments themselves for alignment, and to complete the stress transfer.

Abstract: Circular knitting machine for producing artificial furs or pile fabric having combed-in fibres comprises a drive motor and at least a carding device, which has a drive member being in operative connection with the drive motor for supplying rotary movement to the rotatable parts of the carding device. In order to achieve that in the event of excessive load in the rotating parts at least the operation of the carding device is automatically suspended, according to the invention there is provided between the drive motor (6) and the drive member (25) an overload clutch (23) having a device (30, 63) for automatically stopping the drive motor (6) (FIG. 2) when the overload condition is reached.

Abstract: A housing assembly for a writing instrument is provided comprising a long, hollow barrel member and a ferrule member assembled in end-to-end relationship to afford an inner chamber for a reservoir of marking fluid. A writing nib projects from the ferrule and extends into the reservoir.The ferrule member and the barrel member have adjacent skirt portions in telescoping assembled relation, the skirt portions, when moved longitudinally one into the other, afford latching means, sealing means and means for constraining relative rotation between the assembled ferrule member and the barrel member, thereby providing a securely sealed and easily assembled housing for a writing instrumemt.

Abstract: A core drill stand for orienting and holding a core drilling apparatus for sampling concrete pilings, comprising an elongated column having a support collar fixed at right angles to the elongated column for engagement with the top of a concrete piling, gripping standoffs between the column and piling, a tightening collar to tighten the apparatus to the piling and a movable carriage means supported by the column, the carriage means being adjustable to fit closely about the column and having a pinion drive means engaging a rack on the column for moving the carriage along the column. The carriage is adapted to receive a pneumatic drilling device, other tools or additional columns. Columns are equipped with interfitting end hardware so that a plurality of columns may be joined endwise.

Abstract: A sporadical torque transfer device for yielding element flexible shaft couplings of the tubular type, the device including two shaft end portions, each with two forked ends of two opposed symmetrical teeth having flanks, the teeth overlapping each other in meshing fashion with nominally a positive clearance between tooth flanks, the teeth centrosymmetric with the tubular element and positioned intermediate ends of the tubular element. Optionally, a sleeve has a diametrically oriented member attached to each of its ends and positioned ninety degrees from each other. Together, the cross members and sleeve define tooth receiving openings. The sleeve is positioned substantially coaxially with the shaft portions and the opposed teeth are positioned in the tooth receiving openings of the sleeve and cross members with positive clearance nominally maintained between the tooth flanks and cross members.

Abstract: A support assembly for a mine working has a floor-sill structure for engaging on the floor of the working and a roof-engaging member or members braced by one or more props against the roof of the working. The floor-sill structure employs one or more slidable skids which can be selectively extended in length at the forward end by fitting an extension component of the same width thereto. The or each skid is recessed to receive rear projections of the associated extension component and securing means, such as spindles or shaped locking elements, are used to secure the extension component to the skid. When the extension component is removed, inserts are located in the recesses of the skid to fill the latter and these inserts can be likewise secured with the same securing means.

Abstract: A one-piece, plastic molded, roller skate chassis, including foot plate, trucks, and wheel axles. Each truck, which provides for turning in a conventional manner, includes a cylindrical torsional member, inclined at a predetermined angle with respect to the foot plate, and a shank attached at one end to the torsion member and at the opposite end to a cylindrical shaft which receives the axle of the roller skate. The plastic from which the present chassis is molded is tough and durable, and yet sufficiently flexible and resilient to allow turning. Also disclosed is an adjustable two-piece skate chassis in which each mating member is on a one-piece, molded plastic molded construction.

Abstract: An improved centralizer includes upper and lower collars with a plurality of spring members attached at upper and lower ends to said collars. Each of said collars includes a first and second arcuate collar portion. A first peripheral end portion of said first collar portion includes a radially outward projecting channel. A second peripheral end portion of said second arcuate collar portion includes a radially inward projecting channel which overlaps with said outward projecting channel to define an axially extending hole which receives a latch pin. A novel connection between the collars and spring members is also provided. The collars include a continuous integrally formed peripherally extending bar spaced radially outward from a radially outer surface of the collars, upper and lower peripheral slots adjacent upper and lower edges of the bar, and an upper compression bearing surface.

Abstract: A quick release clutch coupling for coupling two flanges between which torque is transmitted. Each flange carries a pair of axially extending clutch elements, each of which has bearing surfaces so that the clutch elements of opposite facing flanges engage each other along the bearing surfaces for the transmission of torque from one flange to the other. The engaged bearing surfaces of each clutch element lie in a plane which passes through the axis of rotation of the coupling. A bolt, which has oppositely pitched threads, is mounted for rotational movement by a guide on the coupling, and the axis of rotation of the bolt extends in a direction transverse to the axis of the coupling. A pair of tension shoes are carried on the bolt for displacement in opposite radial directions upon rotation of the bolt for preventing axial displacement of one coupling flange with respect to the other. Each clutch element has a further bearing face which bears against one of the tension shoes.

Abstract: A detachable connection for use in applications where detachment or shear of the connection is desirable or foreseen as a necessity. An improvement in a connection between two structural elements having identical, but oppositely oriented complemental connecting portions which mate, forming an enclosed space through which is inserted a deformable coupling member with cross section different from the cross section of the enclosed space. The improved connection will disconnect when subjected to predetermined forces, leaving the oppositely oriented structural elements undamaged.

Abstract: A brace hinge comprising a pair of opposed housings having a plurality of elongated flexible alternate ribs extending from the opposed housings, with the ribs of each housing being slidably received intermediate the ribs of the other housing.

Abstract: Structure for fastening the blade of a motor grader to a support carried on the vehicle while enabling sideward sliding movement of the blade includes support brackets each of which has a slot for receiving a slide rail that is secured along the back of the blade. To sustain wear and to facilitate compensating adjustments for such wear, a pair of replaceable wear strips are situated in each slot between the bracket and rail. The two wear strips are locked together by interleaved portions and each has an angled end portion abutting a separate side surface of the bracket. This construction locks the wear strips in place without requiring any additional fastening means to prevent wear strip movement out of the slots during sliding movement of the blade and rails. The pair of wear strips may have similar configurations enabling interchanging of the two strips after a period of time to distribute wear more evenly.

Abstract: In a tongue and groove joints the base of the groove is provided with one or more protuberances to space the tongue from the base of the groove. If the members forming the joint are such that they swell when moist the protuberances are made to be deformable to permit the members to swell without deforming the structure made from the members.

Abstract: An improved frame for a building formed of structural frame members of steel or other structural metal. The structural frame members are connected together by many resilient connectors, each connector including a bolt having resilient sleeve means surrounding the same. The bolt has a head at one end and a nut threadably mounted at its opposite end. The bolt and sleeve means are inserted through aligned, oversized holes in a pair of adjacent structural members and the nut is threaded on the bolt to interconnect the structural frame members yet allow one structural frame member to slide over the other member, such as during an earthquake, to permit dissipation of energy by the heat of friction. The sleeve means also absorbs some of the energy and allows the structural frame members to return to their initial relative positions after they have been displaced relative to each other. Several embodiments of the sleeve means are disclosed.

Abstract: A mechanical coupling device is provided with a pair of oppositely disposed arcuate jaws and integral arms defining a slot communicating with a cavity for connecting a shaft thereto. A tongue integral with the shaft is engaged by the jaws and suspended within the cavity, and the coupling device slides axially and laterally along the tongue and pivots along the arcuate jaws to eliminate end and side thrust of the shaft. A variable resistance control connected to the coupling device comprises a substrate closing one end of a housing and a rotatable driver disposed within the housing. A resistive path and a conductive collector path are disposed on the substrate along the same radius and a contactor comprising a pair of diametrically opposed contact fingers symmetrically disposed near the periphery of the driver engages the resistive and collector paths.

Abstract: A joint for wire cloth in which free loop portions at adjacent edges to be joined penetrate edges of an opposed wire cloth and are held open so that a locking wire penetrates through the loops; a method of joining the loops which includes holding loops of one wire open by means of a U-shaped bar so that the locking wire can be threaded into the bar and the loops, and as the locking wire is so threaded simultaneously withdrawing the U-shaped bar which has been holding the loops open; and apparatus for effecting the joining of loops of adjacent ends of wire cloth in which the loop forming seams are retained in a position so that a U-shaped bar can be introduced through one of the loops and holds them open for receiving free loops of a wire-screw so that a locking wire can be introduced through interdigitated loops of the wire cloths being joined.

Abstract: A coupling for two members such as a shaft and a compressor rotor or a turbine rotor carried thereby in which it is necessary that the rotor be firmly and tightly fixed with respect to the shaft at all times and in which the rotor and shaft may be subjected to widely different temperatures at any one time. On one of the members, usually the rotor, there are provided three fingers or projections extending toward the other member, while the other member is provided with recesses to receive and fit such projections. The projections are wedge shaped with side plane surfaces parallel to a radius extending from the axis of rotation so that the portions of the members carrying the fingers and recesses can move radially simultaneously outwardly or inwardly relative to one another as one expands or contracts more than the other, without tightening or loosening the coupling.

Abstract: A trench duct system of the type embedded in concrete floors or the like is provided for use in the distribution of electrical power, service and/or communication cables and wiring throughout a building. The system includes a plurality of trench duct sections which are interconnected to form a predetermined distribution layout. Each section of duct includes a cover plate which is removably supported by a pair of vertically adjustable side rails. The length of the cover plate and the length of each supporting side rail may or may not be the same and will depend upon the particular layout. The exposed surface of the cover plate is flush with the plane of the finished floor. Adjoining side rails, when in angular relation to one another, are interconnected by coupling members or connectors which maintain the continuity and stability of the system.

Abstract: The invention is an exercise unit having a pair of rigidly connected spaced rails being elevatable at one end to a selectable height to define an incline, and a flat carriage rollable on said rails and having structure including pulley lines and a foot retainer for drawing the carriage and the body of the user upward along the incline by the physical exertion of the user. The rails are separable into upper and lower halves and are connected together in use by a novel tongue and socket structure reinforced with a hook and rod system. On the rails a foot grip is mounted so as to be freely pivotable during an exercise program.

Abstract: In a plastic key joint wherein edge portions of two adjacent strakes are in relatively superposed, interfitted, edgewise engagement with each other in a manner to define a fully enclosed keyway therebetween, the present invention resides in deforming, preferably in an undulating or sine wave pattern, laterally opposite sides of the keyway prior to injecting, under selected pressure, flowable, hardenable key material into the keyway, thereby greatly increasing resistance of the joint to longitudinal shear stresses.

Abstract: This invention relates to an extremely versatile low cost modular furniture basically employing a modular multi-purpose framework structurally designed introducing a novel corner assembly and a slanted finger joint for use therewith. Said framework consists of adjacent members each member being defined by a horizontal and a vertical portion and leg members diagonally secured in between said vertical portion thereon form a novel corner assembly. The joint used in said members is that of a slanted finger type. At the upper end of said leg member in between said adjacent members is formed with supporting means adapted to accommodate other related component parts of accessories that is in general loosely held in place on said framework to allow an instant formation of different kind of modular and convertible furniture piece and also, permits vertical stacking thereon. Hook members are provided on the face, of said vertical portions, to permit horizontal joining.

Abstract: A plurality of at least two plate or panel-type members are formed with edge portions which hook together to define a key-forming passage therebetween, with tongue-and-groove type interlocks directed laterally from the elements defining both sides of the passage. The passage is filled with initially flowable, solidified key-forming material injected therein under pressure sufficient to cause the injected material to flow along and fill all, or one or more selected portions of the passage. The elements of the panels defining such passage are so formed that the pressurized, injected material tends to expand the passage, and thereby urge adjacent edges of the two panels toward abutting relation with each other, whereby further expansion of the passage is prevented. Upon solidifying, the injected material comprises a key, which interlocks the panels and seals the joint therebetween.

Abstract: The joint comprises a pair of parallel tongues of uniform thickness on an edge of one member which are pressed into grooves of uniform width in another member. The grooves are inclined from top to bottom relative to each other, bending the tongues out of parallelism and thereby locking them in the grooves to form a self-locking joint equivalent to a dovetail joint. Such tongues on the top and bottom edges of a vertical member are pressed into longitudinal grooves in elongated top and bottom chord members to form an I-beam or truss section. The tongues may be formed on the edge of a board or they may comprise the opposite face sheets on a plywood panel. Also, the joint members may be metal.

Abstract: Disclosed herein is a pedestal base system for furniture in which base portions formed of pairs of duplex legs are easily assembled in interlocking splined fashion to form various base configurations for different articles of furniture. The vertical runs of each leg in a pair are welded to connctor tubes with the vertical axes of the connected vertical runs and tubes being in the same plane. The connector diameter and the diameter of the vertical tubular runs are dimensioned so that the legs in each leg pair are spaced from the legs in the other pair to provide clearance to facilitate assembly. The connector tubes of each leg pair are at a different vertical height and receive a vertical locking bolt or locking tube to secure the leg pairs in assembly. The leg pairs are easily assembled at the site by sliding the pairs together in the manner of a splined connection.

Abstract: A rail expansion joint made of two slidably engaging parts, each part being identical in shape and having a full thickness portion welded to the rail and a half thickness portion adapted to overlap the corresponding portion of the other part, the free ends of these two portions having a saw-tooth profile engaging the corresponding teeth of the two portions of the other part.