Abstract: A tool assembly in which the tool holder 6 forms a relatively small volume of metal thereby facilitating brazing of the tool bits (21, 23) and inexpensive replacement.

Abstract: A selectively lockable latch to be used, for example, in fastening two furniture parts or the like in temporary alignment comprises a bolt member, a strike box unit and a lock rod. The bolt member includes a projecting nose and a channel which bisects the nose to define a slideway for the lock rod and to divide the nose into a pair of flexible arms. A snap-latch arrangement acts latchably between the bolt member and the strike box unit and includes selectively interengagable cam surface elements. The lock rod is slidably received in the nose channel to be selectively disposed between the flexible nose arms in one position to prevent covergence of the arms and to lock the bolt member in the strike box unit, the lock rod being selectively withdrawable from between the flexible nose arms into a second longitudinal position whereby to permit convergence of the arms and release of the bolt member from the strike box unit.

Abstract: The disclosure herein describes an element so constructed as to inter-connect with a similarly constructed element in the making of a mosaic display panel, the element defining a rectangular body, the outer wall of which is provided with a longitudinal projecting guide and a longitudinal channel transversely spaced from one another; the channel has a cross-section so dimensioned as to include therein the cross-section of the guide whereby the guide and channel of an adjacently disposed similarly constructed element may interfit in the channel and guide, respectively, of the first element; each channel includes, at one end thereof, an entry pocket to funnel initial engagement of the guide of two adjacent elements to be engaged to one another in a sliding motion.

Abstract: A switch assembly comprises a push-button switch and a switch operating mechanism including an actuator and a plunger for transmitting the movement of the actuator to the push button to operate the push-button switch. While one end of the plunger is operatively associated with the actuator, the other end of the plunger is rotatably and removably, but axially non-movably, coupled to the free end of the push button. For this purpose, the other end of the plunger is formed with a radially outwardly extending anchor flange while the free end of the push button is formed with a generally U-shaped anchor recess for receiving the anchor flange therein.

Abstract: Structure for connecting two members together, each including parallel, spaced apart, oppositely disposed, opposed surfaces having a cross section including a short straight portion adjacent one edge thereof, a longer obliquely extending portion extending from the other edge thereof and merging with an arcuate connecting portion which intersects the shorter straight portion, which surfaces are complementary and arranged to be in engagement with the members assembled. In one modification of the invention, the oblique portion of the surface cross section starts prior to the plane of the short straight line portion of the cross section and crosses it prior to merging with the connecting portion of the cross section.

Abstract: A rotatable table for the display of large objects such as automotive vehicles and the like which is composed of a minimum number of components easily handled by individual assemblers. The components can be assembled and disassembled in a very short period of time and are easily transportable to different locations. The main components consist of a power turntable having stanchion recesses and truss outriggers removably carried by the central power turntable and radially disposed to support sector portions of a supporting top.

Abstract: A three-dimensional archery target (10) is disclosed comprising first and second body segments (11 and 12) having a shape simulating the forward and rearward extremities, respectively, of an animal and a replacable target segment (15) having a shape corresponding to the central trunk of a corresponding animal for being matingly and detachably positioned between the first (11) and the second (12) body segments to collectively define the entire body portion of a corresponding animal. Target segment (15) is comprised of a lightweight, semi-rigid, tangle-free and non-healing material adapted for controlled disintegration from arrow impact. Male dovetails (16, 18) and female dovetails (20, 21) releasably retain the target segment (15) between the first and second body segments (11, 12) in resistance to force in one direction caused by the impact of arrows thereon and to force in the opposite direction caused by removal of the arrows.

Abstract: A self-locking covering device (15, 16) for standing rigging (3, 4, 6) of a boat consisting of first and second elements adapted to be positioned about the standing rigging and including mating tongues and grooves which, upon engagement, hold the two elements together in a self-locking condition.

Abstract: A mounting and method for an excavating implement embodying a shank positioned within a recess, the shank and recess being equipped with confronting spherical zonal walls and the shank and recess at the apices thereof being equipped with spherical segmental walls, the shank and recess between the two sets of spherical walls providing a gap into which thermosplastic material is introducible to provide a superior and stress transmitting fit.

Abstract: A wheeled carriage has an upright column with a laterally projecting and vertically adjustable arm thereon. The projecting end of the arm has a dove-tail connector thereon rotatably adjustable in a horizontal plane; a tubular feed screw support has a mating dove-tail part on its bottom side engageable with the connector. The end of the feed screw support has a second dove-tail connector thereon and rotatably adjustable in a vertical plane. A bracket attachable to the motor of an electric drill has a second mating dove-tail part engageable with the second connector with the shaft of the drill chuck aligned with the axis of the tubular support. Two spaced tubular chucks are mounted on opposite sides of the tubular support to receive and releasably lock anchor cables parallel to the drill. The dove-tail parts mating with the connectors have threaded recesses opening normally to connectors; and slots opening laterally and radially into the recesses.

Abstract: A demountable sealed joint (1) for the fluid tight connection of a sheet member (2) to a support (3), in which the latter is provided with a dovetail groove (5) engaged by a bead (4) of substantially the same shape as said groove and forming a portion of the sheet member (2) and substantially rigid in a transverse direction; the groove (5) comprising two longitudinal undercuts (6, 7) engaged by respective longitudinal extensions (14, 15) of said bead (4) and of which one is more pronounced than the other, the sheet member (2) being connected to the bead (4) substantially at the base of the extension (15) engaged in the more pronounced undercut and at a predetermined distance from the other extension (14).

Abstract: A joint assembly for connecting a pair of furniture components includes a wedge shaped groove extending inwardly along the surface of one of the furniture components and a matching wedge shaped groove in the surface of the other furniture component. A chip member that is disposed between the two furniture components has a wedge shaped notch that cooperates with the wedge shaped grooves in the furniture components to define a wedge receiving recess located along the surface formed by the joining of the two furniture components and the chip member. A wedge member is then disposed within the recess formed by the joining of two furniture components and the chip member.

Abstract: A photography stand system is disclosed assembled from elongate support members into either a tripod or framework structure. The elongate support members form the legs of the camera tripod, each assembled to a tripod platform by mating engagement of fittings into tracks formed in the elongated support members in order to be height positionable. Cameras and various photographic accessories may be mounted to the platform and secured to any adjusted position along the length of each of the support members by coupling fittings including T-bolts fit within the tracks in each of the tripod legs. The support members may also be assembled in end-to-end relationship by a coupling element secured in each end of the support members, and erected into a framework with the camera and various accessories similarly positionable along the length of any of the support members.

Abstract: A cable connector for flexible sewer cleaning rods includes a male coupling member and a female coupling member, engageable by transverse sliding. A locking pin extends through a transverse bore in the female coupling member and through a transverse slot in the head of the male coupling member. The pin is rotatable and includes a cut-out on one lateral side thereof, the cut-out being sized to permit the male member to slide out of the slot when the cut-out is rotated toward the male member.

Abstract: A drill string stabilizer in which the wall-contacting wear elements are secured in their accommodating slots by an undercut along each side and a tapered wedge-receiving notch along the underneath side for accepting one or more wedge pieces. In one embodiment, the tapered notch is along the side of an axially elongate slot and a plurality of wedges are located in securing position along one side. In another embodiment, there are tapered notches along the center between two separated sections of wear elements. In a third embodiment, the slot for the wear elements is not axially elongated but on a spiral angle. In a fourth embodiment, a pluraity of short wear elements are employed end-to-end, each with its own wedge piece and each also located on a thrust-bearing and locating pin.

Abstract: A track roller system includes a replaceable rim assembly made up of two groups of multi-segments held to the hub in axially spaced position by a multi-segment retainer in the central space between the groups of rim segments, the rim segments retained against endwise movement on the hub by central locking surfaces, and the retainers held to the hub by removeable fasteners.

Abstract: An extrusion punch, especially for use in a back extrusion process, wherein a hard wear resistant material is joined on one end to a steel punch body. The hard wear resistant material is joined on at the tip of a steel body so as to prevent wear due to abrasion on the punch caused by the material being extruded in a die means. The hard wear resistant end cap on the tip of the steel body is joined so that it may easily and quickly be replaced when the punch is in position on the machine thereby providing less down time for maintenance on the extrusion press. The method of joining the hard wear resistant end cap to the steel body minimizes the conditions which tend to fracture hard wear resistant material.

Abstract: To secure an assembling of two boards against displacement in one direction the assembling plug is worked out as a body (1) having a cross section increasing from a central portion (2) to both sides. The body (1) is placed in corresponding recesses in the two boards so that the central portion (2) is co-extensive with the tangent surfaces of the two boards. The body may have conical faces (4) with planes (4') tangent to these. FIG. 1.

Abstract: Device for fastening built-in wiring equipment, the bottom of the wiring equipment having a fixed projection for engaging behind one L-shaped extension of an inverted hat-profile-shaped support channel, and a movable projection for snapping behind another L-shaped extension thereof, including a support plate having a device integral therewith for mounting a bus bar to hold a circuit breaker and a first L-shaped extension engageable with a projection of the wiring equipment, and a support strip attachable to the support plate and having a second L-shaped extension integral therewith, the first and second extensions forming together an inverted hat-profile-shaped support channel.

Abstract: A compression member positioned against a member to which other material is to have an opening therethrough and fastening means extending through the openings in the compression member into engagement with a surface of the member to which other material is to be fastened under compressive force applied by the compression member for securing the other material to the member to which other material is to be fastened. The member which other material is to be fastened is secured to the other material by the method of placing the compression member adjacent the member to which other material is to be fastened and placing the fastening means between the compression member and the member to which other material is to be fastened under compression from the compression member.

Abstract: A clamping device for a sliding mount, particularly a dove-tail mount, in which a guide projecting from a slide clock is slidably mounted in a guide groove of a guide body. The clamping device includes a slot in the guide body extending parallel to the guide groove and defining a clamping part between the slot and the groove which can be pressed against the guide. A cavity, in which a bolt is located, is provided in the guide body such that the upper end of the bolt is within the unslotted part of the guide body and the lower end of the bolt is adjacent said clamping part. A clamping screw extends within a threaded bore in the body and is arranged to displace the bolt such that the lower end of the bolt presses against the clamping part whereby the slide block is clamped relative to the groove.

Abstract: Coupling means, for example for use in the furniture industry, comprises a body member having a threaded opening which communicates with an internal cavity; an elongate headed member, a shank portion of which is receivable through a slot formed in the side of the body member with its head retained within the cavity; and a threaded member receivable in the threaded opening and adapted to bear against the head of the headed member. The interior of the cavity is so shaped that tightening of the threaded member in the opening is arranged to draw the shank of the headed member further through the slot into the interior of the cavity.

Abstract: The present invention relates to an assembly-type tire protector comprising a plurality of annular members disposed substantially parallel to the tire surface and a plurality of link members disposed substantially perpendicular to the tire surface, said annular members being connected together by said link members to form a net, each of said link members comprising a body which is provided at both of its ends with opposing hook-like arm means for interconnecting said annular members, said opposing hook-like arm means defining an opening, a pin disposed upright in said body, said pin having a head portion and a base portion, said head portion substantially occupying said opening, said body of the link member containing a blind hole for receiving said base portion of the pin, and means disposed in said hole for expanding said base portion of the pin within said hole for locking said pin in position in said hole.

Abstract: A modified dovetail joint interconnects a plywood web to a chord. The chord carries two grooves extending inwardly from the surface of the chord intersected by the web. The two grooves merge into a single, wider groove adjacent the surface of the chord, are separated by a wedge-shaped spacer, and are inclined relative to each other. The plywood web carries two flexible tongues along its edge portion that are sized to engage respective ones of the grooves in the chord. The tongues are composed, at least in part, of two of the veneer layers of the plywood and are spaced from each other by a web groove formed in an intervening layer of veneer. The inner terminus of the web groove as well as the terminus of the glue laminate between the tongue forming layers of veneer and the adjacent intervening layer both lie below the surface of the chord when the web and the chord are assembled.

Abstract: A support column for a heavy component of a liquid metal fast breeder reactor heat transport system which will deflect when the pipes leading coolant to and from the heavy component expand or contract due to temperature changes includes a vertically disposed pipe, the pipe being connected to the heavy component by two longitudinally spaced cycloidal dovetail joints wherein the distal end of each of the dovetails constitutes a part of the surface of a large diameter cylinder and the centerlines of these large diameter cylinders intersect at right angles and the pipe being supported through two longitudinally spaced cycloidal dovetail joints wherein the distal end of each of the dovetails constitutes a part of the surface of a large diameter cylinder and the centerlines of these large diameter cylinders intersect at right angles, each of the cylindrical surfaces bearing on a flat and horizontal surface.

Abstract: A grille for use as a sun screen, decorative facing, vision barrier or the like is made up of a multiplicity of modular pieces, each of which is of uniform cross section along its length and has walls having spaced-apart, parallel edges defining a base plane and a portion intermediate the edges spaced from the base plane in one direction. An edge flange extends from each edge of the walls of the piece in a direction generally perpendicular to the base plane and opposite from the said one direction, and a pair of spaced-apart slot flanges extends from the intermediate portion of the walls in the said one direction and generally perpendicular to the base plane. The slot flanges define between them a slot that opens generally away from the base plane, the slot having a width at a location nearer the base plane that is greater than its width at a location farther from the base plane.

Abstract: A grille for use as a sunscreen, decorative facing, vision barrier and the like is made up of a multiplicity of modular pieces, each of which is of uniform cross section along its length. Each piece has walls terminating in spaced-apart parallel edges that define a base plane of the piece, and each piece is paired with another piece by bringing the edges of the two pieces together to produce a closed cell. An edge flange extends outwardly from a portion of the walls adjacent each edge of the piece, and a pair of closely-spaced, parallel slot flanges extend outwardly from a portion of the walls and define an outwardly open slot that is centered on a medial plane perpendicular to the base plane and parallel to the edges of the piece. The slot is, moreover, spaced from the line of intersection between the base plane and the medial plane, which line may be considered the axis of the piece, a distance substantially equal to one-half the perpendicular distance between the edge flanges.

Abstract: A tenon and mortise are formed with a taper-dovetail shape. As the tenon is inserted into the mortise, because of the friction force between the contacting surfaces and the squeezing force of the taper, the tenon is fixed sturdily in the mortise and the tenon can be easily assembled or dismantled by a particular shaping of its outer surface.

Abstract: Boards for wooden packing cases with the shape of a parallelepiped, having connecting elements in the form of tenons and mortises that alternate at regular intervals on the edges of the rectangular hexahedron thereof. Each edge is connected with the others by the tenons and mortises. The pitches of these elements are calculated according to the invention from the overall lengths of the respective edge by a novel method so that the mortise-and-tenon connections have bilateral symmetry about a central point of the overall lengths of the edges. A plurality of the connections has an equal basic pitch in a bilaterally symmetrical arrangement, and the invention provides either a pair of tenons (or mortises) at the ends of the edges or a single tenon (or mortise) at the center, with a different pitch, calculated by the novel method. In addition to the novel boards and the method of making the same, the invention also relates to packing cases made therefrom.

Abstract: A fast action disconnect for releasably coupling parts together such as a power line stringing block and a conventional dog nut at the lower end of a power line insulator. The disconnect has a receiving socket for the dog nut insertable through one side of the disconnect and includes a barrier for releasably but positively locking the dog nut assembled to the disconnect. The barrier is movable between a retracted locking position and an extended release position permitting disassembly of a dog nut relative to the main body of the disconnect.

Abstract: An adjustable roller chock characterized by a strong, non-fraying strap structure and particularly by a smooth strap formed of a partially flattened tubular member.

Abstract: An adjustable railing section including upper and lower rails connected by spaced vertical members is mountable between a pair of vertical posts, the posts being secured in vertical positions on a surface by use of U-shaped brackets and individually inserted fasteners that provide for vertical orientation of the posts in two planes perpendicular to each other. The undersurface of the upper rail and the upper surface of the lower rail of each section have spaced, transversely extending, confronting cylindrical sockets formed therein, and the opposite ends of the vertical members carry cylindrical formations that are receivable in said upper and lower cylindrical sockets. The socket openings and the cylindrical formations are configured to permit pivotal movement of the vertical members relative to the upper and lower rails, whereby the angles between said rails and the vertical members can be adjusted universally over a preselected range.

Abstract: A new method of joining boards in the "Cross" connection, "Tee" connection and "Angle" connection is disclosed, which type of connections are widely employed in constructing book shelves, cabinets, etc. Said method of joining boards comprising at a rectangular bar with grooves formed into each of four sides of the bar resulting in a quatrefoil-shaped cross section of the bar and a "cross," "tee" or "angle" made of a metallic rod. The boards to be joined have a hole disposed at the end face, which hole receives an arm of said "cross," "tee" or "angle" depending on the type of joint. The end face of the board has a protrusion built parallel to the plane of the board, which protrusion has a narrower dimension at the root resulting in a cross section similar to that of a rail road. Of course, said grooves formed on said rectangular bar has matching cross sections to receive said rail-like protrusions on the end face of the board in a sliding relationship.

Abstract: A disassemblable table comprising at least a vertical column carrying the table-top and connected thereto in any detachable manner and provided at its lower end with a number of foot members extending radially outwardly from the base of said column, characterized by the fact that said foot members are connected to said column by means of a replaceable base mounting comprising a number of joint members augularly spaced away from each other and adapted to engage complementary joint members, each arranged at the inner end of foot member, and wherein at least one of said foot members may be substituted by a horizontal cross bar, having ends shaped as joint members and designed to connect one column to another in the case that the table has at least two columns, dismountable means connecting together said frame, to each column and relative mounting, extending axially thereacross.

Abstract: A railing system has a mounting arrangement including mounting brackets selectively located within a longitudinal slot in a rail member or in an upright standard, each slot and each mounting bracket having complementary wedge-shaped cross-sectional configurations and each mounting bracket including separate elements secured to one another but urged apart laterally to wedge the mounting bracket securely in place within a slot at any selected longitudinal location. Adjacent rail members are joined together end-to-end by connectors received within a D-shaped cavity in the rail members, the connectors having a complementary, split D-shaped cross-sectional configuration which is flexed outwardly by clamping screws to clamp each connector within adjacent abutted rail members.

Abstract: A first structural member having a portion beveled at an angle of 45.degree. which includes a mortise in the form of a generally cylindrical groove is joined to a second structural member having a portion beveled at an angle of 45.degree. which includes a tenon in the form of a generally cylindrical rib, with the beveled portions in an abutting relationship by a joint formed by the rib being snugly fitted in the groove. The members may be joined at a straight angle or at a right angle, and may be employed for producing modular structural frames; articles of furniture; modular toy constructions; wall attachments; flooring boards and other arrangements wherein the flexibility of straight angle and right angle permutations of interlocking members of standardized elongated configurations are utilized.

Abstract: A new building structural system is described that employs unique elements to interconnect standard structural members in a simple, economical and effective manner. These unique interconnecting elements interconnct a girder and a span member of a building structure, the span member being either a joist or a truss. They consists of two interlocking pieces or elements, one connected to the end of the span member and the other to the side face of the girder member. These unique elements incorporate shaped involutions, webs and reinforcing members that interlock as one element seats down upon the other to interconnect the members in a rugged, rigid fashion. The resulting building structure provides both a flexibility of design and a simplicity of assembly that is remarkable.

Abstract: A needle case and a yoke are respectively formed on their surfaces to be joined together with a key and a keyway which are so shaped as to provide a clearance for receiving a wedge of suitable shape. When driven into the clearance thus provided in the keyway between the needle case and the yoke fastened together, the wedge tightly holds them together in intimate contact with each other.

Abstract: A machine stand having a planar surface is formed with a groove of predetermined width. A precision guide rail slightly narrower than the groove is received in this groove and has an edge confronting and spaced from one of the flanks of the groove. A corrugated spring steel holding element is compressed between the edge of the rail and the flank of the groove and has corrugations extending transverse to the plane of the machine stand.

Abstract: A blade assembly for equipment such as a bulldozer, snow plow or the like has a moldboard and a replaceable blade. A plurality of rearwardly projecting lugs are provided adjacent the top edge of the blade and a corresponding plurality of sockets are provided adjacent the lower edge of the moldboard. The upper and lower surfaces of the lugs are horizontal while the side surfaces diverge rearwardly. The moldboard sockets are correspondingly configured but of greater width than the lugs. A locking bar having forwardly projecting locking lugs is detachably mounted on the rear face of the moldboard. The locking lugs are of such configuration as to substantially completely fill the portion of the socket remaining open when the blade lug has been inserted and shifted laterally in the moldboard socket.

Abstract: A wedge arrangement for removably affixing a work tool or work tool holder to a base member on mining, road working or earth moving machinery, and the like, and being particularly useful in the mining, road planing and earth digging areas. The arrangement is such that the removable member may be readily replaced and wear and tear on the base member greatly reduced to the extent that such base member will not be destroyed or otherwise rendered useless; such base member may be a part which is permanently secured to the basic machine or it may in fact be the machine itself or some integral part thereof. The base member is preferably provided with a slot of a size sufficient to receive both the removable member and a wedge element; such member and element may be placed within the slot from above thereof, lateral entry of the removable member and wedge element into the slot often being unnecessary.

Abstract: A joint is formed by pushing a grooved tenon into a dovetail-shaped mortise containing a barbed wedge such that the wedge is forced into the tenon groove, thereby spreading the tenon to the dovetail shape of the mortise and anchoring the barbs into the tenon, thus securing the joint and preventing the tenon and mortise from separating.

Abstract: The invention relates to a knock-down fitting which comprises a pair of interlockable elements adapted to be secured to respective walls of an item of furniture for maintaining said walls in fixed relation to one another when the elements are interlocked. The elements have cooperable means interengageable in a snap-fitting manner to secure the elements together substantially without play.

Abstract: In a corner joint construction of the dovetail type, the tenons and mortises on each wall at the end portion extend only partially through the thickness of the walls commencing at the inner portion thereof. The remaining or outer portion of the wall thickness is mitered from the termination of the tenons and mortises outwardly to form abutting, solid end portions which conceal the tenons and mortises therebehind.

Abstract: A dual tapered dovetail shaped mortise is formed within a joist to receive a dual tapered dovetail shaped tenon extending from a beam. Laterally oriented cavities are disposed within opposite faces of the mortise to receive correspondingly configured ridges formed integral with the mating tenon. The resulting frictional interlock between the mortise and the tenon created by two forces acting in opposition to one another rigidly secures the beam to the joist without play therebetween. The ridges, mating with the corresponding cavities, affords use of the resulting joint in any plane from horizontal to vertical without danger of separation.

Abstract: Means are provided for joining a pair of foundry flasks which includes in combination one half of a V-shaped dove tail flange along each adjacent edge to be joined so as to form a V-shaped dove tail clamp and generally C-shaped clamp member having a jaw at each end adapted to slidably engage the dove tail flange and having a central depending tongue between the jaws adapted to bear on the two adjacent flanges at this juncture.

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: A demountable structure, for example for forming scaffolding, shelf assemblies or frame assemblies comprises a pair of co-axial spaced connection and support members with a connection element or bracket interposed between the ends of the members. The engaging surfaces of the support members and brackets form frustum cone surfaces and are drawn together and stiffened by a threaded stem passing therethrough.

Abstract: A hard-surfaced screw conveyor for centrifuges has a helical metal blade with a plurality of wear-resisting segments mounted on one side thereof, there being mating parts on the opposed surfaces of the segments and the blade which are slidably interengaged to prevent radial outward and axial relative movements of the segments and the blade.

Abstract: A joint is formed by pushing a grooved tenon into a dovetail-shaped mortise containing a barbed wedge such that the wedge is forced into the tenon groove, thereby spreading the tenon to the dovetail shape of the mortise and anchoring the barbs into the tenon, thus securing the joint and preventing the tenon and mortise from separating.