Abstract: A tambour door includes a plurality of elongated elements having front and back surfaces of rectangular transverse cross-section placed in abutting side-by-side relationship including a flexible backing material overlaying and adhesively secured to the back surfaces of the elongated elements. The elongated elements are cut from a single panel formed of a wood composition board core having a thin veneer sheet attached to at least one face. The front surface of the elongated elements are formed with a design which extends over a plurality of adjacent elements. The design is pressed into the door, stretching and compressing the veneer rather than tearing it. The design depth can be approximately 11/2 times the veneer thickness. A cabinet including such tambour doors includes side pockets in which the doors move on tracks when the doors are moved to the open position. When the doors are in the closed position, they are planar and extend across the opening into the cabinet.

Abstract: A miniaturized fiberoptic illuminating device, includes fiberoptic cables providing a plurality of optical fibers for conducting light and ferrules inserted over end portions of the cables. Apertures which are formed from the output ends of each optical fiber pass the light from the optical fibers. The device also includes a single optical lens, which may be a cylindrical lens or a modified cylindrical lens having different lens shapes formed into the surface thereof, aligned with the apertures for receiving light emitted from the optical fibers and passed through the apertures. The lens focuses the light in a desired pattern and may be rotated to clean the lens and/or adjust the beam pattern. The device also includes a housing having a row of spaced apart cavities receiving and supporting the ferrules and a single cavity spaced forwardly of and extending transversely to the row of cavities which contains the lens. The single cavity is spaced forwardly from forward ends of the row of cavities.

Abstract: A spotlight assembly (10) has inner and outer hemispherically shaped mounting members (20, 21) fixed to the roof (R) of a vehicle (A). Inner and outer movable frames (12, 14) are mounted on the fixed mounting members (20, 21) for relative rotative and tilting movements upon actuation of a handle (78). A lamp unit (16) is mounted on outer movable frame (14) about horizontal pivots (90, 91) from linkages (106, 50, 51). The tilting movement of handle (78) results in a tilting movement of lamp unit (16) around three times the angular movement of handle (78) to permit lamp unit (16) to be easily folded to a protected retracted position as shown in FIG. 3.

Abstract: An improved combination suction elbow assembly and light assembly for use in conjunction with whirlpool bath systems, wherein the embodiment of the invention shown herein is uniquely configured to provide a light assembly which may be readily removed from the inside of the bathtub for replacement of the bulb. The light assembly of the present invention is configured behind a removable deflector with a light transmissive angled surface. The deflector's angled surface minimizes the effect of the light assembly on flow through the suction elbow. In addition, the removable deflector provides a water tight seal connection to prevent any water from reaching the light assembly. A simple tool in the form of an elongated cylinder, having a plurality of wrench pin keys is disclosed.

Abstract: A transparent drawing board and supporting light box combination. The light box has a housing with a source of light and a translucent light diffuser positioned on an angle with respect to the base of the drawing board. A rectangular, transparent drawing board has four soft support strips which fit within a peripheral wall formed about the sides of the translucent light diffuser. This permits the transparent drawing board to be securely held on the angled top of the light box and also permits the transparent board to be lifted, turned, and again supported on the upper edge of the peripheral wall. The transparent drawing board extends past the four soft support strips so that it may be easily lifted from the light box.

Abstract: A headband for use in holding a flashlight to the side of a user's head. The flashlight is attached to a plate. The plate is releasably attached to the headband. When the user desires to change the orientation of the flashlight, the plate is removed and reattached at the desired orientation. The flashlight can thus be oriented so as to cause the flashlight beam to be directed generally along the user's line of sight or any other desirable axis.

Abstract: A portable, compact, battery-operated light apparatus for use with a compact computer game having a LCD video screen for enhancing the visibility of the LCD screen in use, which light apparatus comprises a body witha battery compartment and having side panels which define an open viewing space and lights provided in the body element to provide for indirect lighting of the viewing space, the light apparatus comprising a portable, compact, battery-powered light apparatus and which includes ridges on the light apparatus which snap in a releasable manner onto the grooves in a compact computer game video system to releasably secure the light apparatus in position over the LCD video screen of the compact game system.

Abstract: A solar powered light adapted to be mounted under the eaves of a building, a wall or the like for use in security applications. In a preferred embodiment of the present invention, the solar powered light comprises an adjustable configuration having a lamp with an infrared detector or sensor rotatably mounted thereto and a photovoltaic or solar cell array rotatably disposed at a remote end of an extension arm movably attached to the lamp. Such a flexible arrangement allows the photovoltaic array to be positioned to receive direct sunlight. The sensor activates the solar powered light upon sensing infrared to illuminate the surrounding areas when a presence is sensed and turn it off when a presence is no longer sensed. In accordance with a second embodiment, the solar powered light does not include an infrared detector and provides continuous illumination for a given period of time.

Abstract: A lantern has a housing with a front end portion, a handle portion and a base portion with an incandescent bulb and a reflector in the front end portion and a fluorescent tube in the base portion. The base portion can be rotated by means of a rotatable joint through 180.degree. so that, using the front end portion as a base, the fluorescent tube can be positioned and angled to give optimum illumination for any particular use.

Abstract: A lighting system (10) is disclosed comprising a free-standing base (12) supporting a track lighting strip (20) in a substantially vertical position. Lighting elements (38) may be positioned at any point along the track lighting strip. Spacer tubes (80) and protective elements (90) cover and enclose the track lighting strip.

Abstract: A reflection type lighting apparatus includes a light source, a main mirror for reflecting light from the light source toward an illumination area to be illuminated, an auxiliary mirror for reflecting light from the light source toward the main mirror, and a light transmission portion surrounding the main reflection surface. The main mirror has a non-circular reflection surface which defines a light emission area. The auxiliary mirror has an auxiliary reflection surface with a center emission opening, to reflect light from the light source, transmitted through the light transmission portion, back towards the main mirror.

Abstract: A trouble light has a positionally adjustable hook and also may carry a rotatable cord reel. The trouble light has a shield that mounts to a base and extends alongside a light source. An elongated slot extends through the shield. A hook for hanging the trouble light has a shank that extends through and is slidable along the slot. A securing device will secure the shank to the shield at selected points and at selected angular orientations. A cord reel mounts to the shank and is rotatable relative to the shank.

Abstract: A lighting fixture is comprised of a housing fabricated in two mating sections which are joined in a manner that produces a reveal in the bottom exterior surface of the housing. A switch, and preferably a slide switch, is mounted to the interior side of the housing such that the switch actuation member, preferably a slide member, projects through a reveal slot so as to accessibly, but unobtrusively, project from the housing's reveal. The switch preferably has multiple operative states corresponding to the different slide positions of the switch's slide member within the reveal.

Abstract: Method and apparatus for the electromagnetic dynamic plasticating of polymer materials includes a magnetic moving body which is supported both axially and radially by a magnetic levitation gap. The magnetic body is rotated in non-steady state vibration within an electromagnetic winding and cooperates with a stationary body to form a processing space for the polymer material.

Abstract: An extrusion apparatus is provided for the mixing and extrusion of thermo-plastic and thermo-setting materials and the pelletizing of thermo-set materials, in which a rotor member is rotatable within a barrel member. The apparatus is articulated into three sections including a barrel entrance section, a forcing section and a metering section. Each section is provided with helical rotor extrusion grooves, and is followed by a circumferential barrier and a rotor to barrel to rotor mixing zone. The circumferential barrier is provided with a clearance, barrier top to barrel bore, designed to pass fluent material and retarding the over-size and less fluent material. The leading edge of the circumferential barrier is provided with multiple dual purpose plows which, direct the fluent material downstream and the over-size and less fluent material upstream for additional working.

Abstract: A method for modeling a conducting material sample or structure system, as an electrical network of resistances in which each resistance of the network is representative of a specific physical region of the system. The method encompasses measuring a resistance between two external leads and using this measurement in a series of equations describing the network to solve for the network resistances for a specified region and temperature. A calibration system is then developed using the calculated resistances at specified temperatures. This allows for the translation of the calculated resistances to a region temperature. The method can also be used to detect and quantify structural defects in the system.

Abstract: For evaluating mechanical properties of ceramics such as silicon nitride in a nondestructive manner, a specific heat of ceramic test samples to be evaluated is measured at a temperature not higher than room temperature. A comparison is made between a measured value of the specific heat of the test sample and a known value of a specific heat of a ceramic reference sample at the same temperature not higher than room temperature. The comparison, permits making conclusions regarding the mechanical properties of the ceramic test samples based on the known mechanical properties of the ceramic reference sample. The creep strength is given as one example of the mechanical properties that may be ascertained by a nondestructive inspection that may be part of a production line, whereby the mechanical properties of the individual ceramic products may be guaranteed in practice.

Abstract: A temperature distribution analyzer is disclosed. In the analyzer, a measuring optical fiber is provided so as to extend through a target region in order to analyze the temperature distribution of the region. A LD pumped solid state laser generates pulse light having high energy and supplies the pulse light to one of the terminal portions of an optical fiber. This causes a stimulated-Raman-scattering phenomenon in the optical fiber whereby Raman-scattered light is obtained from the other terminal portion of the excitation optical fiber. An optical filter selects light having a predetermined wavelength from the Raman-scattered light and outputs the selected light. An optical device introduces the output light of the optical filter to one of the terminal portions of the measuring optical fiber and receives Raman-backscattered light generated in the measuring optical fiber through the same terminal portion. A photodetector converts the Raman-backscattered light to an electrical signal.

Abstract: This invention provides tamper-safety labeling that can easily be applied to a container and closure means to disclose the opening of the container. This labeling is a single piece one that has a generally parallel perforated tear strip and tab formed from the face stock and that allows the tear strip and usually perforated member to be formed and laminated to a release liner having a release thereon at least commensurate with adhesive positioned in the laminate on each side of the tear strip in the face stock. Also, the tear strip may run at any angle from the horizontal plane of the container to permit the tear strip to be removed to present different arrangements of the labeling on the container and may become a product or origin identification for the container.

Abstract: A linear motion guide assembly is disclosed which employs an extruded U-shaped aluminum channel with inserted hardened steel races. A linear slider having recirculating roller element bearings which is slidably mounted upon the extruded track. The load bearing races of the recirculating bearings are opposed to in a spaced parallel relation to the insertable bearing races of the track. The track has linearly extending structures substantially parallel to the track races the structure being of substantially decreased stiffness so forming elastic hinges which supply an elastic pre-load between the track and the linear slider and wherein the lower modulus of the housing and the hinged structure allow significant deflection of the housing without excessively pre-loading the bearings.

Abstract: A drive device for wipers of motor vehicles includes a shaft extending a front face of a bearing housing and with a cylindrical slide bearing which is inserted into the bearing housing at little distance from the front face of said bearing housing, and with a ring groove limited by the slide bearing, the bearing housing and the shaft. A bush firmly fixed to the bearing housing and made of elastic material closes the ring groove in front of the slide bearing and at its end turned off from the bearing housing comprises a sealing flange radially projecting towards the inside, which sealing flange engages into a ring groove of the shaft.

Abstract: A print head of a dot printer is controlled to move at a speed that is a function of a maximum dot duty cycle value from an accumulation of dot duty cycle values that are functions of the numbers of dots in the various columns of a line of print and a constant value.

Abstract: A stenotype machine has a casing with a rear panel and a front panel. The casing is substantially symmetrical with respect to a plane bisecting and perpendicular to the rear and front panels. The casing further has a top panel intersecting the front panel at an upper edge thereof and of maximum width at its intersection with the front panel. The machine further includes a keyboard with keys on first, second, third and fourth additional panels which have keys to be operated by the user's right thumb, right fingers, left thumb and left fingers. The second and fourth additional panels intersect vertical side edges of the front panel and make an angle of 60.degree.-70.degree. with each other. The first and third additional panels intersect the second and fourth additional panels, respectively. The second additional panel intersects the first additional panel at right angles thereto and the fourth additional panel intersects the third additional panel at right angles thereto.

Abstract: A single manually operated mode selector lever controls selection of a push, pull or park mode of operation of a form feed tractor in a printer. The lever controls a cam which moves a spring-biased tractor drive shaft axially so that a gear on the drive shaft selectively engages a first gear which drives the shaft in a first direction, a second gear which drives the shaft in a second direction, or engages no gear so that the drive shaft is not driven. The form feed tractors are mounted on the drive shaft so that the shaft may move along its axis relative to the tractors or the tractors may be pivoted relative to the shaft. The mode selector lever also controls a mechanism which applies a force to a tractor plate so as to pivot the tractors about the drive shaft, thereby changing the orientation of the tractors relative to the platen. The force applied to the tractor plate is also transmitted to pressure or pinch rolls in the pull mode to relieve constraint on movement of the forms.

Abstract: This invention relates to a writing instrument wherein a temporary ink storage member made of a synthetic resin injection molded article is sandwiched between a pen tip and an ink tank. In the present invention, a flange portion for fitting to a predetermined apparatus, which is positioned around an outer peripheral portion of the temporary ink storage member, is formed integrally with a shaft made of a synthetic resin injection molded article. In embodiments of the invention, the temporary ink storage member is made flexible, the shaft is made of a material which is softer than that of the tip holder, and the tip holder is used as a writing thickness display member. The temporary ink storage member can be used as an ink color display member and a cap is used as an application display member. In other embodiment, the cap can be fitted selectively in accordance with types of writing instruments.

Abstract: The connector is of the type attached to one end of a first element and having a throat designed to allow engagement around a matching retaining collar mounted on a second element which is to be attached to the first element. The cross-section of the connector has an M-shaped profile having two central bars separated from side bars by empty spaces. The central bars delimit between them the throat and the side bars allow the connector to be attached to the elongated first element to which it is fitted. The present connection is particularly suited for erecting scaffolding.

Abstract: An articulating joint is provided for use in a foldable frame for a stretcher for example, which is capable of being selectively locked against upward, downward, or lateral folding by rotating the joint relative to the folding frame member.

Abstract: A one piece shaft which supports two rotatable members is provided with shafts for energizing the rotation and for controlling an energized force of each member separately. The shaft includes a shaft body which connects two hollow shaft bodies attached to each rotatable member unrotatably on the same central shaft axis so as to rotate relatively, two members attached unrotatably to the fixed member attached rotatably to both sides of this shaft, and two torsion bars bridged between the separated hollow shaft bodies and the cap member respectively.

Abstract: A slope and skew hanger for connecting a rafter to a beam at a variety of slope and skew angles. The hanger includes a connection portion and an integrally attached seat portion which is connected with the connection portion along a bend line. The connection portion includes a central opening, a pair of side connecting brackets joined by connecting strips and adapted for connection to the beam, and a pair of centrally positioned connection flanges extending outwardly from the front face of the connection portion and adapted for connection with the sides of the rafter. A further feature of the present invention is the provision of a raised spherical portion and an offset nail receiving opening to facilitate the angled nailing of such a hanger or bracket to the beam or rafter.

Abstract: The crash barrier of the invention generally comprises a track, a series of telescoping members, one or more tensioners, and a brake system. The series of telescoping members are slidably engaged on the track. The telescoping members can successively nest within each other. The members are provided with side walls that are sufficiently strong to withstand the impact of a vehicle that veers off the road into the crash barrier. The tensioner is formed of an elastic material. The tensioner is connected between one of the telescoping members and one end of the track. When the telescoping members are fully extended, the tensioners are in a substantially relaxed state. When the members telescope together under the impact of a vehicle, the tensioners stretch, thereby absorbing the kinetic energy of the vehicle. The tensioners are retained in the strained position by a one-way brake system.

Abstract: A tactile edge-warning strip made from a sheet-metal strip having a series of projections formed in the strip to present an uneven surface for tactile feedback. The upper surface is covered with a roughened coating to inhibit slipping. The strip further includes an angled strip edge portion for anchoring the strip edge into the surface to which it is fixed to inhibit lifting of the strip from the surface.

Abstract: A vehicle mounted vibrating tamping device for attachment to a support vehicle having an attenuated extensible boom to pre-position a vibrating multiple fixture head against a work surface. The tamping device is self-contained independently controlled for selective loading force on the work surface and interconnects with the hydraulic system of the vehicle.

Abstract: Capactor teeth are normally utilized to provide crushing and/or grinding and compaction of refuse material and to compact soil on top of the refuse material. It is advantageous to provide a tooth that provides good traction of a capactor wheel and both good demolition and penetration of the material being crushed. In the subject arrangement, a tooth has an outer surface which has at least six edges with a plurality of side surfaces extending therefrom and angled with respect thereto at an obtuse angle. The tooth has a generally rectangular base with a longitudinal plane defined therein parallel to the length of the generally rectangular base. Apexes defined by the side surfaces are parallel with the longitudinal plane and angled with respect to the outer surface within the range of 115.degree.-135.degree..

Abstract: Teeth for compactors are normally utilized to crush and/or grind refuse material and/or soil being worked and to effectively compact the refuse material and/or soil being worked. It is also advantageous to insure that the teeth being used provide traction of the compactor wheel on the materials being worked while not allowing the refuse material and/or soil to collect between the teeth of the compactor wheel. In the subject arrangement, the tooth provides a tip portion having an outer surface with at least six edges and a plurality of corresponding side surfaces extending therefrom at an obtuse angle with respect to the outer surface. The tooth defines a longitudinal plane therethrough that is parallel to the length of the tooth and perpendicular to the outer surface. Two of the side surfaces lie perpendicular to the longitudinal plane and form obtuse angles with the outer surface in the range of 115 degrees to 135 degrees.

Abstract: Method and apparatus for distributing graywater from graywater sources exclusive of sewer sources has a plurality of distributors dispersed in a ground distribution area, each distributer having a cavity with a top and a bottom which is vertically displaced from the top, an inlet port in the top, and an outlet means, wherein the outlet means includes a graywater-to-ground interface means forming the bottom of the cavity. The outlet means is preferably a perforate screen and the cavity is preferably a frustoconical section designed for burial in the ground in a hole of less than about one foot in diameter. Gravity feed or pressure feed may force the graywater into the soil without allowing the graywater to stagnate. The shape of the cavity prevents vertical displacement of the distributor when it is buried. A one-time inlet connector port assures that feed conduit is not inadvertently removed. A filter system prevents graywater from backing up.

Abstract: A dynamic breakwater system pumps water from a body of water in response to wave action or underwater currents. A submerged stationary base is fixed to a solid subsurface. A breakwater protrudes upwardly through the surface of the water. Wheels support the breakwater for displacement on the base along a generally horizontal displacement axis. Springs acting against opposing sides of the breakwater urge it to a rest position between two horizontally extreme positions, and wave action and underwater currents against either side of the breakwater produce a reciprocating movement of the breakwater along its displacement axis. A pump pumps water in response to the reciprocating movement. The pump has a large piston spaced from the pump housing by roller assemblies. A door permits access to the pump interior for removal of debris or for repair, and a locking mechanism fixes the breakwater to the base to arrest pumping action for such purposes.

Abstract: A pier driving assembly is disclosed which supports the foundation under compression forces. The pier driving assembly includes a pier driving bracket which drives the pier pipes into the ground, a pier head which is placed on the pier pipe after the pipe has been driven to bedrock and the pier driving bracket assembly has been removed, and a loading bracket which gives the final lift to the foundation to make it level. When complete, all that is left in the ground is the pier and the pier head. The pier driving bracket and loading bracket are removed when their use is completed. This assembly allows for easy access to the pier should the building settle again.

Abstract: A building method is provided that avoids the use of the traditional excavated foundation. The method comprises placing primary support members (10) into the ground in which the structure is to be built at predetermined intervals, spanning the gap between support members (10) by pre-cast reinforced concrete beams (14) of generally inverted T-shape and predetermined length and building, for example, a double skin wall (42, 44) on the outer flange (22) and top of the beam while the inner flange (22) supports a floor slab of beams (40) blocks (46) and screed (48) and abuts the inner face (31) of the upright of the beam to resist inward lateral movement thereof.

Abstract: A ground reforming method comprises a first step for inserting an injection rod into ground to be reformed, which injection rod includes a first conduit and a second conduit surrounding the first conduit, and a first injection nozzle communicated with the first conduit and a second injection nozzle surrounding the first nozzle and communicated with the second conduit; a second step for feeding first component of an instantaneous hardening type hardening material into the first conduit of the injection rod and a second component of the hardening material (or compressed gas) into the second conduit; and a third step for injecting the first component and the second component (or compressed gas) at a super high pressure through the first and second nozzles to mix each other with moving back the injection rod from the inserted portion with revolving.

Abstract: A pneumatic tube conveyor system comprises at least two dispatching stati (13) for dispatching conveying cases and at least two receiving stations (22) for receiving the conveying cases. Pneumatic tube lines connect the dispatching stations and the receiving stations. An intermediate store (25) is provided within the tube lines. The tube lines are associated with a plurality of gates (21, 26, 33). Control means serve for connecting any dispatching station selectively to any receiving station or to the intermediate store, and for connecting the intermediate store to tube lines leading to any receiving station.

Abstract: A pneumatic tube conveyor station serves for receiving conveying cases (12) rriving from a forwarding tube (11) and having a high weight of, for example, 12 kg and a high travelling speed of, for example, 7 m/s. The conveying cases (12) are initially braked in a rotatable intermediate store (15) and are then transferred, after the intermediate store (15) has been rotated, to a unloading position (56). The intermediate store (15) is arranged in a position above the forwarding tube (11) and the unloading position (56). The intermediate store (15) and the unloading position (56) are connected one with the other by a substantially vertical tube section (40, 41, 55).

Abstract: A machining tool for adjustably securing a replaceable cutting member thereto. A tool head is provided with a flat ledge portion at one end, a positioning screw assembly for adjusting the position of a cutting member on the flat ledge portion, and a securement screw assembly for securing the cutting member to the tool head.

Abstract: An in line drilling device for boring holes an equal distance from one another in wood, plastic or metal, comprising a set of geared together shafts equipped with drilling bits. The bit holder shafts are guided by bearings housed in a frame biased upwardly by springs. The fully compressed springs act to limit the extent of projection of the drill bits into a workpiece.

Abstract: A high performance drill bit is presented for precision drilling of holes in hard-to-drill materials, such as a carbon fiber reinforced plastic material. The drill is a gun drill type having a pair of flat flutes and a pair of air holes for delivering coolant and/or lubricant. The main feature of the drill is the provision of two pairs of cutting edges formed on the intersecting ridges formed at the leading sides of the flank surfaces with the flute surfaces. At the tip of the drill bit, a pair of primary cutting edges, having a point angle .alpha., is disposed. It is followed by another pair of secondary cutting edges, having a point angle .beta., where .alpha.>.beta.. Physically, this means that the secondary cutting edges are inclined more toward the drill axis than the primary cutting edges. The secondary cutting edge is followed further by another flank surfaces which are even more inclined toward the drill axis.

Abstract: A reamer having a single cutting blade with parallel clamping and seating surfaces seated in an anvil having converging radially outward extending planar surfaces for enhancing the clamping effectiveness of an installed anvil/cutting blade adjustably positioned radially by a pair of set screws angled to provide fine adjustment.

Abstract: An annular hole cutter has a radially inner cutting tooth portion and a radially outer cutting tooth portion. Each of the inner and outer cutting tooth portions is formed with a flute for ejecting cut chips on the outer periphery of the cutter, and a cutting edge for radially outwardly pushing the cut chips. Therefore, the cut chips are smoothly ejected through the flute, and thus an annular hole is precisely cut at high speed.

Abstract: The generator for plastic lenses comprises a rotatable chuck for rotating an optical lens blank on a first axis. A drive system displaces the chuck and thereby the lens blank generally transverse to the first axis. A cutter is operably associatable with the chuck for engaging the lens blank and causing shaping thereof. The cutter includes a high speed rotary element rotatable on a second axis angularly disposed relative to the first axis. A second drive system for selectively displacing the cutter parallel to the first axis is provided. A computer control is operably associated with the first and second drive systems for coordinating displacement of the associated chuck and cutter for causing a selected curvature to be generated on the blank.

Abstract: The invention relates to a tool for aligning a true axis of a milling machine spindle with an edge of the workpiece to allow exact positioning of the spindle above a center of a bore to be drilled. The edge finder has an elongated body which carries a measuring gauge and which is provided with a push pin which contacts the edge of the workpiece and pushes a pivotal arm of the gauge to indicate a location of the edge of the workpiece.

Abstract: A two-part fastening clip made of a hard-elastic plastic material for fastening a piece of molding to a panel. The device includes an upper part having a cover plate, with the molding being secured to one side of the cover plate, a stopper element that extends perpendicularly out from an opposite side of the cover plate in a direction away from the molding and a bulge on its free end that tapers conically in both its axial directions. The device also includes a lower part that can be anchored in a hole in the panel and has a socket casing having a through opening therein for receipt of the stopper element of the upper part and a constricted edge in the opening behind which the bulge of the stopper engages to lock the two parts together.

Abstract: A twist type locking pin formed from a single piece of wirelike stock having a U-shaped bend forming two sides, one side being bent to form an arcuate loop which terminates short of the other side and is bent at an angle to cross over the other side, the other side being bent to form an arcuate loop which lies in a plane perpendicular to the plane of the first arcuate loop, the end of the second arcuate loop overlying the one side, the second arcuate loop forming a bearing surface at the end of the other side, the second loop forcing the other side outwardly from the one side on insertion of the one side into a post, the other side producing a bias force which rotates the one side through 90.degree. when the end of the other side clears the post to pivot the locking pin to a locking position.