Abstract: A transition bolt for clamping together the side rails of a pair of edge-to-edge concrete wall form panels or the like comprises an enlarged head portion, a reduced shoulder portion, and a further reduced shank portion and is characterized by the fact that the shoulder and shank portions are flat-sided and have their sides coplanar and the shank portion is formed with interrupted screw threads along its edges for reception thereover of a threaded nut.

Abstract: An improved interference fit, fatigue-rated pin-type, nondeformable fastener and joints formed thereby are disclosed in countersunk flush head and protruding flat head embodiments, each characterized by a straight interference fit shank with a lead-in convex shoulder adjacent its threaded end operable to cold work the wall material of the straight fastener hole during fastener insertion, and with the shank progressively expanded in a concave curvilinear profile to its head end starting at a location preferably intermediate the ends of the shank. Curvature of the expansion profile fairs smoothly at relatively large radius into the straight intermediate portion of the shank. At its opposite end, the expansion profile curvature merges into a relatively sharp curvature of very small radius (i.e., of the order of 1% of the first and larger radius) that fairs smoothly into the lower face of the fastener head.

Abstract: The invention contemplates an improved construction of the reinforced ends of flexible sheet-metal panels used in defining the basic generally cylindrical wall to be lined with flexible material in the erection of a prefabricated swimming pool. The end-reinforcement structure uses substantially thinner-gage material than heretofore, and yet a secured joint of two lapped panel ends has the hoop-tension resistance of the best of previous constructions without presenting any ambiguity regarding the sense (i.e., overlapped relation of parts) at the overlap.

Abstract: An industrial fastener, which may be secured or released by a one-quarter turn, includes a rotatable bolt. The bolt has a cam face on the underside of its head, a shank having opposite flats and a screw threaded end portion. A turning means, such as a handle member, slides on the bolt and has matching opposite flats to turn the bolt. The fastener also includes a spring which detents the handle member and an adjustable nut.

Abstract: A decorative building panel is disclosed for mounting on a wall surface. Particularly, a panel in the form of an imitation shutter. The panel is more rigid than present types of simulated shutters, also the panel may be shipped to the site in kit form and easily assembled in the field. The panel has a plurality of slats arranged side by side and at least two spaced apart straps extending across the slats. Connecting means are provided at each of the intersecting positions between the straps and the slats, the connecting means being integral with each of the straps for rigidly connecting the straps to the slats, and spacer means at each of the intersecting positions for spacing the panel from the wall surface.

Abstract: An assembly of two plane flanges of possibly different flexibilities clamped together by studs. It comprises sealing means including a lip weld in the plane of the join and centering rings disposed around each stud in each bore. Application to flanges connected to asymmetrical structures such as a collar and a cover.

Abstract: A propulsion unit for driving water craft, particularly those of the floating lounge type, is disclosed as including a fin made from a flexible material with a first end formed to define a foil into which the lower end of an oscillatory drive member projects downwardly in a fixedly secured relationship and with a second flexible fin end that extends from the foil end to provide a flapping movement through the water upon oscillation of the drive member in order to propel the water craft. Movement of the drive member through the water is facilitated by the foil shape of the first fin end which is also more rigid than the second flexible end so as to increase the moment arm about the drive member where the flexible flapping movement is concentrated. Flexible sheet plastic is preferably used to form the fin with a folding operation at a score line to define the foil shape.

Abstract: A unit for remotely operating an element to different positions such as start, fast, slow and stop for a driving application such as the one herein illustrated for the engine of a lawn mower. The unit is made of plastic material being molded in two parts with a recess in the side of one part which is adapted to receive a tube forming a handle. A bolt passes through a hole in the part and through the tube to which it is securely retained when a lock nut and bolt is tightened. The unit has a slot between the two parts in which a lever is movable to advance and retract one or more control wires which operate the carburetor, brake or other element of the lawn mower.

Abstract: A novel tricycle wherein a seat and rearward wheel assembly are movable together and are variably secured to a central frame section toward or away from the forward wheel and handlebars in order to accommodate various sizes of riders while maintaining the same weight distribution of riders with respect to the rear wheels.

Abstract: The device comprises a pair of locating pins extending outwardly of an edge surface portion of one of the cabinets and adapted to be received in complementary through openings in the corresponding edge of the adjacent cabinet to be connected, the outer ends of the locating pins being conically rounded to provide for horizontal and vertical alignment by cam action. An elongated, lever controlled interlock member serves to interclampingly engage turned down skirt portions of the thus aligned cabinet edges to retain the cabinets in interlocked relation.

Abstract: In an assembly of two parts having flat assembly faces, the upper part has a bore provided with an ovalized orifice and the lower part has an internally-threaded bore, the two bores being coaxial when the parts are in the assembly position. A first connecting member has a threaded end in cooperating relation with the internally-threaded bore and a second connecting member has a portion in contact with one face of the upper part. One member has an ovalized portion which cooperates with the ovalized orifice and has a deformable portion which cooperates with the other member after crimping in order to secure the two members at least against rotational motion.

Abstract: A lock spindle blind fastener, formed of a suitable, related metal, which includes a mandrel, a sleeve and a locking collar in which the sleeve has a countersunk head having an under head included angle greater than the included angle of the as-prepared hole and in which the sleeve head has a straight counterbore for the initial reception of the locking collar, communicating with an entrant resistance angle for reception of the collar during setting. Such entrant resistance angle is less than the under head angle. The relationship of these angles is such as to permit the use of a single action, or non-shifting head, setting tool. Also, such angular relationship assures an effective lock between the mandrel, or spindle, and the sleeve when the fastener has been set.

Abstract: A fastening system having a continuously curved countersink section in an aperture through a plurality of workpieces, with a corresponding pin-fastener having a continuously curved head portion substantially congruent to the continuously curved countersink. Pin fasteners and bolts equipped with the continuously curved head surfaces taught herein when mated with a continuously curved countersink provide sufficient resistance to fastener pull through, cause cold working of the workpiece around the countersink, and impose an elastic load upon the workpiece and fastening strengthing the joint.

Abstract: Cluster assembly means for articles of furniture comprising a plurality of rigid support elements each of which has a straight slot opening from its outer wall into an inner cavity. A joinder member has an axis, an axially extending web to fit in the slot, with a pair of axially extending flanges adapted to stand one in each cavity whereby to hold the support elements together in a cluster which includes the joinder member. One or more cluster assemblies may be used to form a structural part of an article of furniture such as a chair, table or cabinet.

Abstract: Fastening means are employed in a load-bearing structure, such structure including structural members adjacent to each other at two spaced apart points, the fastening means being of the threaded bolt and nut type serving to connect the structural members together and to transfer load forces between the members at both points, and including a bolt and a nut each having a head and an integral shank including a cylindrical bearing portion, such shanks being inserted through bolt holes in the structural members and the shank bearing portions being in load-bearing engagement with the members at respective points.

Abstract: The disclosure relates to a fastener for use in highly stressed connections particularly in environments and with materials susceptible to stress corrosion or delamination. The fastener is installed in aligned openings in abutting components and exibits an interference fit therewith to maximize fatigue life of the connection. The interference fit is controlled in a unique manner.

Abstract: A tubular web having a generally circular cross section in the body portion; tapering at its ends in a symmetrical manner and terminating in an end portion having generally flat outside surfaces with the distinguishing characteristic being in the separated end walls. An opening is formed in the separated end wall flat areas for receiving a metal connector pin.

Abstract: A pin-type connector for interconnecting a pair of members having nominally aligned through-bores without requiring true alignment of the bores including a cylindrical cup-shaped bushing with a discontinuous upstanding wall having a frusto-conical interior surface and a fastener-receiving bore in the bottom of the bushing, the bushing at least partially receiving a pin whose exterior surface is frusto-conical and engages the interior surface of the bushing, with a fastening means being received by the pin through a bore therein. The pin is drawn into the bushing by the fastening means, thereby expanding the wall of the bushing to frictionally engage a bore of one of the members. At least one of the frusto-conical surfaces is slightly eccentric with respect to the longitudinal axis of the element upon which it is formed.

Abstract: A first and a second element have respective abutting surfaces which together form an interface. One or more connecting members, such as screws, rivets or the like, connect the elements together. The juxtaposed sides of the elements are formed with respective matingly inter-engaging projections and recesses which resist forces that are being transmitted between the elements and act in the plane of the interface. The invention is especially advantageous for use in erecting trusses or arches of halls and other buildings, and in such a case the elements may be structural plates having the recesses and projections grouped about the locations of the respective connecting members.

Abstract: A device suitable for coating popcorn with cheese, butter, or the like comprises an axle positioned at an acute angle to a horizontal plane, means for rotating the axle, and four vessel-gripping prongs releasably secured to the axle for rotation therewith. The prongs, which are formed from two U-shaped members, are spaced radially from each other and each has a portion which lies generally parallel to the axis of rotation of the axle.

Abstract: A surgical chair for a doctor embodying an infinitely elevationally adjustable seat connected with a support column, a stand tube arranged within the support column, at which there is attached a base frame equipped with rollers and a lifting device within the stand tube. The lifting device is operatively connected with the support column and can be unblocked by a lever system so that the seat, depending upon the degree of loading thereof, is elevationally adjustable. A foot pedal located between two overhang members of the base frame is arranged with its upper edge at most 4 centimeters above the floor and with adjustable freedom of movement with respect to the floor. The foot pedal is secured by a lever to an angle lever pivotably mounted at the stand tube and acts upon a plunger of the lifting device. At least three guide grooves are provided at the support column and extend uniformly about its inner periphery and parallel to its central axis.

Abstract: A threaded fastener incorporates a conical head and has a shank section closest the head that is tapered to interfere with the workbore and displace work material creating an annular bulge at the work surface bounding the head.

Abstract: A joint structure for use in securing an article to the edge of a piece of composition board includes a screw having an elongated shank with an enlarged head integrally formed with one end thereof and a threaded section formed on the opposite end portion. First and second helical threads in the threaded section having different major diameters are used to secure the fastener within a pre-drilled hole formed in the edge of the particle board. The hole includes an outer end portion whose diameter is greater than the major diameter of the larger thread and whose length is approximately equal to the length of the threaded section of the shank. In addition, the hole includes an inner end portion which opens into and is coaxial with the outer end portion and which has a diameter smaller than the major diameter of the smaller thread. The length of the hole is longer than the length of the shank of the screw.

Abstract: A pair of members, one of which has a multiplicity of projections extending therefrom in a uniform geometric pattern with the projections aligned bi-directionally at 90.degree., and the other member has a multiplicity of recesses arranged to mate with the projections to allow bi-directional adjustment and also locking when the members are fastened together.

Abstract: A weak link for securing a life raft painter to a vessel in such a manner that, upon sinking of the vessel, the life raft in its container floats toward the surface to extend the painter its full length. The buoyant force of the raft and container activate a raft inflation mechanism and the increased buoyant force of the inflated raft breaks the weak link and frees the raft from the vessel. In addition, the dual strength weak link can, with a force significantly less than the buoyant force of the inflated raft, be broken manually such that the raft may be freed from the vessel prior to its actual sinking.

Abstract: A fastening device such as a nut for a bolt that is passed through a tapered slot in one member so that it can be adjusted along the slot relative to another member before the bolt is tightened. The nut is double-tapered so that when it is drawn into the matching slot it wedges against the sides of the slot and positively locks the bolt against movement.

Abstract: A yieldable joint between two elements such that the adjacent lapped edges of the elements will shift relative to each other. The joint comprises a pair of plates to be joined by lapping adjacent edges thereof, pairs of corresponding perforations in the lapped plate edges, and a bolt passing through each of the pairs of corresponding perforations. At least one perforation of each pair of corresponding perforations comprises a keyhole elongated in the direction along the line of relative movement of the pair of plates, with one end of the keyhole being of such size as to freely receive the shank of the bolt and the remaining elongated portion thereof being of a width less than the diameter of the shank of the bolt.

Abstract: The disclosure relates to a fastener for use in highly stressed connections particularly in environments and with materials susceptible to stress corrosion or delamination. The fastener is installed in aligned openings in abutting components and exhibits an interference fit therewith to maximize fatigue life of the connection. The interference fit is controlled in a unique manner.

Abstract: A fastening device for the connection of two bodies having aligned openings therein utilizing two members having facing inclined surfaces and projections engaging the lip of an opening such that an impact force creates a wedging action resulting in firmly securing the two bodies.

Abstract: A connector fixture for joining a first structural member to a second structural member. The second structural member includes a central bore and a pair of lug receiving apertures disposed at a predetermined distance on opposite sides of the central bore. The first structural member includes a central bore adapted to register with the central bore of the second structural member and in addition has a pair of outwardly extending lugs which register with and are received in the lug receiving apertures in the second structural member, thereby properly positioning the first and second structural members relative to each other. A connector, such as a bolt and nut, is then inserted through the central bore of the first and second structural members to clamp the members together.

Abstract: A washer is disposed axially on a bolt between two portions which are to be secured by the bolt. The portions have holes or openings therein, which are larger than the diameter of the bolt for providing a range alignment between the portions and the bolt. The washer has a sharp circumferential lip edge on each side thereof which is generally parallel to the axis of the bolt. The edges protrude into the respective portions once the bolt has been axially tightened to thereby secure the portions in a predetermined disposition relative to each other. Lateral movement of the portions relative to each other is thus prevented or reduced.

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.

Abstract: A stress coining fastened joint, for minimizing stress concentration in a wall of an aperture in a metallic structural member, the tool being a rigid elongated shaft adapted for forcible insertion through the aperture. The shaft has end portions and is provided with a plurality of different diameter, annular protuberances spaced intermediate the end portions. The largest of the protuberances has a diameter of such predetermined relationship to the diameter of the aperture, that upon a forced insertion thereof through the aperture the material forming the wall of the aperture is displaced radially substantially the difference between the diameter of the largest protuberance and the diameter of the aperture. The displaced material will thereafter rebound approximately one-half of the initial displacement. The stress coining tool may be combined with a conventional fastener to provide a simultaneous stress coining and fastening operation.

Abstract: A joint construction including a plurality of work pieces with aligned holes and with a tubular member in the holes. The tubular member has a major section with a first outside diameter and a minor section with a second outside diameter smaller than the first diameter with both sections defining a substantially constant diameter common central passage therethrough, and has been expanded into contact with the work pieces about the holes to coldwork the work pieces.

Abstract: A riveted joint employing a rivet having a cylindrical shank and a head with a conical undersurface, flared uniformly outwardly from the shank and truncated by an upper surface that is generally similar to the minor portion of a filled torus, sliced normal to its centerline. When being installed in a workpiece aperture to form the joint, the rivet head cold-flows to assume adequate expansion into the aperture while becoming generally flush to the workpiece surface so rivet head shaving is not required.

Abstract: Vibration testing apparatus in which the driver bar interconnecting the slip plate and shaker head in vibration transmitting relation supports the slip plate more closely adjacent the shaker head and in cantilevered fashion, opposite the locus of free-sliding engagement of the slip plate and its support block, and free of such locus.