Abstract: A filament-type trimming apparatus comprises a reel case including a main body and a bottom member, a cord reel housed in the reel case and which is wound with a nylon cord, plural stoppers on a lower surface of the cord reel and on an inside of the bottom member and which become engaged when the cord reel is pressed downward by a coil spring, a mechanism for releasing a centrifugal force of the cord reel and which is provided between the cord reel and the bottom member and which comprises radial guide grooves and balls arranged inside the guide grooves, and plural stoppers on an upper surface of the cord reel and on an inner surface of the reel case respectively and which become engaged when the cord reel is pressed upward resisting against the pressing force of the coil spring. A boss is provided inside the reel case main body at its center and to which the coil spring is fixed.

Abstract: A device is disclosed for trimming grass from around a pop-up sprinkler having an annular top and a pop-up head concentrically mounted within the top. The device comprises a handle having a grip mounted on one end. A circular cutting element is mounted on the opposing end, the circular cutting element having a diameter larger than that of the annular top. A centering device mounted within the interior of the circular cutting element engages the pop-up head and centers the device over the top.

Abstract: A chain saw guide bar having two opposed nose plates at the free end thereof. Each nose plate has an outwardly formed impression which faces the outwardly formed impression in the opposed nose plate, to allow a thicker idler roller assembly to be mounted between the outwardly formed impressions. The idler roller assembly includes an inner bearing journal, roller bearings, and an idler roller with a concave groove around its outer circumference, within which groove the drive links of the saw chain track. Two thin shims are placed on opposite sides of the idler roller assembly between the nose plates. A replacement nose assembly is also disclosed which includes two substantially identical outer plates positioned apart a given distance.

Abstract: A circular saw for more precise movement during cutting comprising a circular blade with a peripheral edge having teeth and a power source to rotate the blade about its axis; a shield covering at least a portion of the blade to protect a user from the peripheral teeth of the blade; a blade plate positionable on the work piece to be cut with an elongated aperture for the passage therethrough of the blade, the blade plate having a notch at its leading edge in alignment with the plane of the blade; a laser device positioned on the shield to project a laser beam in a line from the notch along the workpiece to a line along the direction to be cut; means to power the laser with a visible light; and an optical element to fan the laser beam onto the workpiece in a line within the blade plane and intended direction of blade movement with an angular divergance between about thirty and sixty degrees.

Abstract: A method for rotationally positioning a rotor for balancing procedures uses an instrument within a housing that is temporarily mounted to the axial face of a rotor for determining rotational locations with respect to a reference mark located on the rotor. The instrument has a needle indicator which is responsive to gravity, and is mounted such that it can rotate independently of the position of the housing. Tick marks representing degrees are arranged in a circle around the edge of the needle indicator. Two sets of numerical scales are provided, each in a different color, one increasing in a clockwise direction, and the other increasing in a counter clockwise direction. Two arc shaped arrows are provided, one each in the two colors used for the two sets of numerical scales. The color of the arc shaped arrow that points in the direction of incremental rotor rotation indicates that the set of numerical scales printed in the same color should be used for reading the degree of rotation.

Abstract: A navigation device is disclosed, having a lens across an opening at one end of a case, and a compass across an opening at the opposite end of the case. A transparency holder is positioned between the lens and the compass, adapted to receive a map transparency with magnetic north thereon aligning with a north marking on the body of the compass, at a distance from the lens approximating the focal length of the lens. A first grid wheel is provided between the transparency holder and the compass, having a transparent or translucent central area inscribed with parallel grid lines and at least one first directional arrow aligned parallel to the grid lines, the grid wheel being in close proximity to the transparency holder such that it is also at a distance from the lens approximating the focal length of the lens.

Abstract: An improved self centering guide pipe axis laser guide is based on the use of three parallel links spaced 120 degrees apart which are engaged to be expanded or contracted. When expanded the links contact the inside diameter of the pipe which accordingly establishes the center axis of the pipe. The links are actuated for expansion or contraction by mounting a spring base spider element in association with a spider lever element on a smooth pipe housing, wherein the movement of the spring base spider element and the spider lever element is controlled by thumbscrews on each of the elements, the smooth pipe housing containing within, the power supply and laser module, and a removable switch assembly at the rear enabling easy access to the batteries. The laser guide can readily be withdrawn from the pipe by attaching a tether line to the front end and levels for determining the slope are mounted in slots in both the front and rear spider elements.

Abstract: The present invention relates to a kind of movable device which varies at any angle to serve as measurement ruler, and more particularly to an improved structure of measurement ruler with multiple functions in use. The ruler's main body is L shaped with engraved number of degrees on both sides, one side with sliding channel and a sliding through installed at the lower end of the sliding channel, which is wider in breadth than the channel, one measurement ruler like a straight stick with engraved numbers in degrees, one end of which is in conical shape and the other end of which at the top there installs a sign index with a conical peeping hole and a set of installation holes, one scale ruler in semi-circular shape with sliding block in consecutive form. Under it, there is sliding column on which there are threaded lines. AT the front end, there in an assembly hole. The semi-circular body is engraved with the degrees in angle.

Abstract: A measuring instrument, e.g. a ruler, has an upper measuring surface provided with graduation marks and numerals and a lower surface. The instrument comprises a first plastics molding formed with apertures therein and one or more second moldings molded to the lower surface of the first molding and having portions which extend at least into, and preferably through, the apertures in the molding to define the graduation marks and numerals. The two moldings and are of contrasting visual impact, e.g. different colors.

Abstract: A gunsight device for a rotating-wing aircraft having a hollow rotor hub (1), on which there are radially mounted blades constituting said rotating wing, and which is connected to the main transmission box (2) by a drive shaft coaxial with the rotor of the aircraft. The device includes a nonrotating gunsight head (3) mounted, by means of a support (4), at the free upper end (5a) of a nonrotating mast (5) arranged coaxially inside the hub (1) and the drive shaft of the rotor, the other end (5b) of which mast is fixed into the main transmission box (2), a rolling contact bearing (6) coaxial with the rotor axis being provided between the hub (1) and the mast (5). A suspension (7), intended to filter out the excitations in roll and in pitch to which said gunsight head (3) is subjected, is provided between the base (4a) of the support (4) of the gunsight head (3) and the upper end (5 a) of the mast (5).

Abstract: A monitoring system having a stylus mounted to a support that controllably moves the stylus along a travel path as it contacts an object of interest. The object is supported by a rotating turntable and held in place by a retainer that exerts a repeatable downward force on the object. A frame that supports the stylus is moved by a number of motors to provide three mutually orthogonal directions of motion to the stylus. Coordinated translations of the stylus and rotations of the object allow the monitoring system to check the shape of the object and compare the measured shape with specifications for the object.

Abstract: A stair stringer layout jig used on a pair of stringers disposed side-by-side adjacent one another comprises a longitudinal base lying along and between the stringers, with spacers for uniformly spacing the stringer sides. A transverse member with two clamps is connected to the base to squeeze the stringers together. A pair of carpenter's squares are disposed symmetrically in mirror relationship on opposite sides of the stringers so as to allow the legs of the squares to pivot. A vernier adjustment serves to simultaneously pivot the carpenter's squares in opposite directions about their pivot points, so as to lay out stair riser and stair tread locations which may be simultaneously and identically varied in mirror relationship on both of said stringers.

Abstract: An exercise device for strengthening the muscles and ligaments of the feet, legs and lower torso. The device comprises a platform element, front and rear securing straps, a footbed and a tractive sole. The rear securing straps are attached substantially below the upper level of the platform element, helping to preclude inadvertent egress from the device while in use. The front securing straps are for substantially securing the forward portion of the foot to the device. In a preferred embodiment, the exercise device comprises a longitudinal upper strap, a radial lower strap and a mid strap for maintaining the foot securely in the exercise device.

Abstract: An integrally molded midsole for an athletic shoe having tubular suspension members is disclosed. The tubular suspension members behave as springs and have spring constants which may be designed for a particular application by choice of the tube length, the tube wall thickness or the hardness of the tube material. Preferably, the midsole is made of an elastomer such as HYTREL that is cast in a preformed shape and thereafter subjected to substantial compressive forces so that the tubular springs take a compression set and thereafter perform as near-ideal springs.

Abstract: A cleated athletic shoe having a crisscross arch reinforcement extending between selected cleats on the sole of the shoe. An athletic shoe having a lacing arrangement in which the series of eyelets on the instep portion of the shoe are asymmetrical with the series of eyelets on the outstep portion of the shoe.

Abstract: The invention is related to alpine ski boot including a rigid shell base overlaid by an upper that has a front portion and a rear portion, the latter being at least partially pivotal with respect to the shell base and including a latching and unlatching device with respect to the shell base, accessible from the exterior of the boot via a control member, the latching position of the latter, corresponding to an initial adjustable reference advance position, from which the upper is capable of an angular clearance along an amplitude predetermined with respect to the shell base.

Abstract: A control system for automatically controlling a work implement of an excavating machine through a machine work cycle is disclosed. The work implement includes a boom, stick and bucket, each being controllably actuated by at least one respective hydraulic cylinder. A position sensor produces respective position signals in response to the respective position of the boom, stick and bucket. A pressure sensor produces respective pressure signals in response to the associated hydraulic pressures associated with the boom, stick, and bucket hydraulic cylinders. A microprocessor receives the position and pressure signals, and produces a command signal. An electrohydraulic system receives the command signal and controllably actuates predetermined ones of the hydraulic cylinders to perform the work cycle.

Abstract: An image or object support apparatus holds an image or object, such as a photograph, drawing or other graphic work in a spaced position relative to a backing plate. The backing plate is itself supported in the place of display, as by picture hanging means or a stand. The image or object is supported by struts having grippers enabling easy changing of the image or object, and easy adapting to images of various size.

Abstract: An animal-identification component including a flexible and deformable panel for carrying animal-identification information, with the panel being sufficiently flexible and deformable to flex and bend to minimize snagging of the panel on objects which contact the panel, and a panel retainer for securing the panel to a stud, with the panel retainer having a flange with an opening therein, and the panel retainer made of material sufficiently rigid to resist flexing and deforming, with the flange having a face for engaging a sufficiently large portion of the flexible and deformable panel to prevent the panel retainer from being drawn through an opening in the flexible and deformable panel, and the panel having a frangible neck extension for frictionally engaging the sidewalls of an opening in the panel to maintain the panel and the panel retainer as a unit prior to attachment of the panel to an animal.

Abstract: Disclosed is a reflecting animal ear tag to protect open range cattle against being struck by a vehicle at night by improving visibility of the cattle. The reflecting ear tag also provides an ear tag which may be used in the conventional manner to identify and record information about the cattle. The tag comprises a frame-like tag holder formed of resilient plastic. The holder is reflective to the visible light normally emitted by vehicular headlamps and the like. An ear attachment clip comprises a resilient U-shaped clip body integrally attached to the top of the holder. A post having a pointed end extends inwardly from a second clip arm such that the post may engage with a hole through a first arm. The post also has a plurality of annular barbs whereby the post, and consequently the tag, is locked to the animal's ear after being driven therethrough. A removable tag insert is disposed within the frame and has surface properties to permit writing thereon.

Abstract: An animal eartag houses a passive electronic transponder for use in the identification of the animal by a low frequency radio wave reading system. The eartag is formed of a generally flat and flexible plastic body or carrier member that includes an ear attaching arrangement at the upper portion thereof, and a hollow half cylinder shaped bubble or elongated first cavity at the lower portion thereof. This first cavity is closed at one end and is open at the other end. A rigid plastic insert member comprises a mating half cylinder shape that is dimensioned to closely fit into the open end of the first cavity. The insert member includes an elongated bore, or second cavity, that extends generally coaxially of the insert member's half cylinder shape. This second cavity extends less than the entire axial length of the insert member, so as to form a second cavity having an open end.

Abstract: A tabletop backlit display for use in tradeshows which can be readily assembled and disassembled on site, and when disassembled, can be accomodated in a single shipping carton of a size acceptable at normal rates by package delivery services. A major feature is an articulated lighting unit assembly which includes a pair of lighting units each carrying three equally spaced parallel fluorescent lamps, an intermediate reflector panel and a pair of auxiliary side reflector panels, the lighting assembly being foldable, without removing the lamps therefrom, from an in line operative configuration in which all of the fluorescent lamps are equally spaced, to a compact generally U-shaped alternative or shipping configuration. The assembly is removably mounted on a frame with supporting members, and a flexible, rollable light transmissive display panel is removably mounted on the front face of the frame.

Abstract: A product information module (such as a shelf tag, shelf label or the like) includes a housing in which a physical embodiment of information is mounted and a locking device which mounts the housing to a support surface. The locking device includes a locking member which coacts with the support surface to form an angle A whose tangent is less than the coefficient of friction between the locking member and the support surface. As a consequence, locking force is minimal and lateral movement of the module is resisted no matter how much force is applied.

Abstract: A holder for protectively displaying flat objects includes a jacket formed from two identical rectangular sheets of semi-rigid transparent plastic disposed one atop the other and sealed together along three edges by bonding to intervening spacer strips. The unsealed fourth edges define an entrance opening to an enclosure bounded by the sheets and spacer strips. The sheets are bowed into contact upon a center axis. A pouch-like retainer member adapted to confine a flat object, and having a centered display aperture, is dimensioned to slideably insert into the jacket. The force of interaction of the bowed sheets is sufficiently strong, and the weight of the holder is sufficiently light to enable the holder to be suspended by the retainer member.

Abstract: A cartridge magazine for a gun includes a machined magazine body having an open edge and open bottom and a separate edge plate slidably attachable to the magazine body to cover the open edge and a floor plate slidably attachable to the magazine body to cover the open bottom and to lock the edge plate in place. A cylindrical coil spring is held in position in the magazine body and has a cartridge follower on one end and a spring base plate on the other which base plate has a detent member for locking to the floor plate for holding the cartridge magazine together. The process selects the components and assembles them by positioning the spring in the spring supporting portion of the magazine body, sliding the edge plate into position and then sliding the floor plate into position to lock the edge plate, floor plate and follower spring together.

Abstract: This invention teaches a novel method of safeguarding and protecting a weapon from being accidentally fired or misused by an unauthorized person. Without a verified pre-registration signal, an arming safety solenoid remains in a fail-safe position, preventing use of the weapon. The electronically actuated solenoid enables the use of trigger only when a valid identification signal is received. The system is comprised of microminiature circuits contained within the grip of the weapon and a ring that is worn on same hand that uses the firearm.When the weapon is first pickup by the intended user, a switch closure in the grip of the gun turns on a transmitter, which sends a low power, limited range interrogation signal to the finger ring. Upon receipt of this signal, a transponder mounted within the finger ring responds by sending a coded signal that contains a serial number identification.

Abstract: A recoil pad for a shoulder gun such as a rifle or shotgun having a compressible pad on the butt of the stock to absorb and cushion the shock to the shooter when the gun is fired. This recoil pad may be assembled to the gun at manufacture or applied to the gun by the owner after-market. This recoil pad may be constructed of an elastomeric material such as closed-cell-foam containing a compressible fluid such as air or gas. An alternative embodiment is a bladder and a pump for inflation of the recoil pad at the will of the shooter. Another alternative is a bladder having a certain pressure.

Abstract: The scent dispenser of the present invention has a casing which is attached to the sole of a boot by means of VELCRO. The casing flexes when compressed by the force exerted upon it by the boot upon contact with the ground and returns to its unflexed condition when the boot is raised from the ground. The casing has a cavity for scented liquid and two or more apertures which communicate the cavity with the atmosphere outside the dispenser. When the casing is compressed, scented liquid is expelled from the cavity through the apertures to the atmosphere. When the cavity is not compressed, the liquid is confined within the cavity.

Abstract: A fishing lure contains a light source which when OFF is turned ON by the transition from disconnected to connected state of a device which acts as a switch. The device includes a conducting body with a defined locus of movement for said body during motion of said lure, and a pair of contacts adapted to be connected or disconnected by said body at various locations in said locus. The movement of said body causes it to make mechanical impacts and the vibrations from said impacts are transmitted to the water surrounding said lure.

Abstract: A unitary structure which serves as a waterfowl decoy anchor having attached anchor line which structure is configured to be removably received for storage on the keel of a floatable waterfowl decoy.

Abstract: An apparatus for supporting and jigging fishing lines comprising a jigging mechanism having an elongated jigging bar positioned in an essentially linear configuration and having free ends, bearing structures to support the free ends, an oscillating means for reciprocating the jigging bar about its axis, and a plurality of rod holders coupled to the jigging bar, each adapted to hold a fishing rod therein; a supporting mechanism coupled to the bearing structures and adapted to be coupled to a boat for holding the jigging rod at a distance offset therefrom; a motor for providing power to the oscillating means; a power delivery mechanism for providing power to the motor; a switch mechanism coupled between the motor and power delivery means for activating and inactivating the motor at the discretion of an operator; and an oscillating mechanism coupled between the motor and the jigging bar for effecting a rocking motion to the jigging bar to jig fishing rods placed in the rod holders.

Abstract: A spinning rod assembly comprises an elongated rod having a handle from which a reel shank laterally extends. A pair of finger supports extend from the handle and straddle the reel shank. The finger supports are configured to bear against the fingers of an angler grasping the rod as the angler casts and retrieves to distribute attendant pressure among the angler's fingers and relieve pain and discomfort previously associated with casting and retrieving.

Abstract: A lure with outstanding reverse gliding features and unprecedented glide path control features is disclosed. The lure comprises a lure body, a wing, an arm portion which extends upwardly from the wing and a buoyant member which is connected to the upper end of the arm. The arm can be adjusted to control the position of the buoyant member which, in turn, controls the direction of glide, the rate of descent during a glide and the rate of ascent during retrieval. The arm can be adjusted to position the buoyant member in a neutral position where the lure, during gliding, will have a generally straight glide path. The arm can also be adjusted to position the buoyant member in a non-neutral position so that the lure glide path will be generally arcuate.

Abstract: A swivel for coupling a fishing lure to a fishing line comprises a body rotatable about an axis and having one end accommodated in a cavity of a housing. A journal within the housing encircles the body and has latching fingers which extend radially outward of the axis into latching engagement with keepers on the housing. The journal confronts a retainer having projections which are operable in response to the application of tensile force on the swivel to resist movement of the latching fingers in a direction to release them from the keepers.

Abstract: A fishing sinker having a length of rubber tubing attachable to a fishing line with a wire snap. A wire segment of the snap is insertably engaged with one end of the rubber tubing and tears free of the tubing, upon the sinker becoming snagged on an obstruction, to allow retrieval of the remainder of the rigging. Lead weights of different sizes are selectively inserted into the tubing.

Abstract: A trap for catching flies having a cylindrical clear plastic outer shell with a removable lid and an opening in the bottom is disclosed.A funnel-shaped entryway within the cylindrical outer shell. The space between the funnel-shaped entry and the outer shell is filled with bait for attracting flies. A piece of string is glued or otherwise affixed to the inside of the small end of the funnel and dangles below the trap to form a "landing platform" for the flies to alight and crawl into the baited chamber where they become trapped and die.The lid can be removed for easy cleaning and refilling with bait.Attachment means are provided at the upper end of the trap where a piece of wire or string can be attached to hang the trap.The bait includes honey, milk, and diced apple.

Abstract: A vegetation barrier includes a water permeable container. The container includes salt.

Abstract: Tree growth is suppressed by placing an implant below the bark layer of the tree at each of a plurality of sites spaced around the circumference of the trunk of the tree, each implant containing a unit dose of active ingredient selected from flurprimidol, paclobutrazol, and uniconazole.

Abstract: A pot for culturing a plant, particularly bulbous plants from which sprouts elongate while stem roots stretch out such as Liliaceae wherein the plant can grow upright in good condition, has a good appearance, and moreover, the grown plant may not fall down and assure a satisfactory number of flowers.In other words, a pot for culturing plants has a lid having a stem opening at the center, a guide tube having openings for the passage of stem roots and a pot having a side wall and a bottom portion, wherein the lid is attached onto the upper edge of the pot with the pot combined with the guide tube.

Abstract: In a window lifter of the cable type, comprising a motor for driving the cable bearing a slide (6) linked to a second slide (7) supporting the window, the two slides (6, 7) may be coupled via an elastic tension element (16) and one (6) of the slides is fitted with an electrical switch (17), associated with the second slide (7) so as to change state when the load on the slide (7) carrying the window (8) exceeds a predetermined value and when the elastic element (16) undergoes an extension corresponding to the separation between the slides; the switch (17) forms part of an electrical supply circuit for the motor, capable of reversing its direction of rotation when this switch (17) changes state, so as to free the movable member from an obstacle in its path. This electromechanical safety device has a simple structure and a low manufacturing cost.

Abstract: A window bar unit for securing a window and permitting selective opening of the unit for access to an associated window. The inventive device includes an upper grate assembly securable to a window and having a plurality of receiving tubes. A lower grate assembly includes a plurality of telescoping members which slidably extend into the receiving tubes such that the lower grate assembly can be telescopingly positioned within the upper grate assembly to provide access to the window.

Abstract: The invention herein provides a key operated locking device for utilization with an awning window. The locking device allows the building occupant to fix the rotatable panels in an open posture to assist in preventing vandals and burglars from entering the premises by further opening the rotatable panels. The locking device includes a removable key and a latch which can be rotated into a slot which is positioned in the slide bar of the crank mechanism.

Abstract: A trolley rail system (10) for supporting and guiding a sliding cooler door (14) of a walk-in type cooler. The system has a guide rail (27) having two linear segments (29,30) and two deviation ramp portions (33,34), and an auxiliary rail (38). The system also has a leading trolley (41) and a trailing trolley (42). The leading trolley has a wheel (51) supported upon the guide rail. The trailing trolley has a primary wheel (52) supportable upon the guide rail and an auxiliary wheel (53) supportable upon the auxiliary rail.

Abstract: A one-piece glass run guide for retaining and smoothly guiding a slidable vehicle window includes a polymeric strip having a substantially U-shaped transverse cross section including a base, an inboard leg having a projecting lip portion which engages an interior surface of a slidable vehicle window, and an outboard leg having a projecting lip portion which engages an exterior surface of the slidable vehicle window. The glass run guide can be formed such as by injection or compression molding, extruded, or can be formed from a combination of molded and extruded portions.

Abstract: An assemblage (10) for relieving overpressure in an enclosure (12) has a first panel (14) configured to surround an opening (13) in the enclosure (12), The first panel (14) comprises an outer skin (19) and a thermal barrier layer (15) for providing insulation during normal operation, A gasket member (24) is bonded to the thermal barrier layer (15) between panel edges (22). The gasket member (24) includes a magnetic portion (26) comprising magnets (23) encased in outer layer (16) for releaseably sealing the first panel (14) to the enclosure (12) and a bellows portion (28) for accommodating movements in the first panel (14) during thermal expansion.

Abstract: The invention is a transportable foldable building for being mounted on a supporting foundation, and method of erecting a transportable foldable building. The building includes a central roof section, first and second outer roof sections, and first and second side walls. The central roof section is supported in vertically spaced relation above the foundation. The first and second outer roof sections are pivotally attached to opposing edges of the central roof section, and extending downwardly from the central roof section during transport of the building to reduce the width of the building. The first side wall is pivotally attached to the first outer roof section for being folded in overlying relation to the first outer roof section during transport of the building. The second side wall is pivotally attached to the second outer roof section for being folded in overlying relation to the second outer roof section during transport of the building.

Abstract: A general purpose sand anchor, including: a paddle shaped anchor base, curved like the face of a spade shovel, for use as a hand-held shovel for digging the hole into which it will be placed; a line, with one end joined to the anchor base at the center of its wider part and the other end joined to the anchor base at the end of its narrower part; a hook, which attaches to an object to be secured, joined to the line at a point above its connection to the center of the wider part of the anchor base; and a handle, which is used to remove the anchor base from the sand, joined to the line at a point above its connection to the end of the narrower part of the anchor base.

Abstract: A two-piece solarium panel cap comprised of a top and bottom member, wherein the bottom member is bridged across adjacent solarium panels to provide a water seal. The top member is selectively secured upon the bottom seal member to seal the fasteners from the environment. Both pieces can be comprised of resilient polyethylene material which is much less expensive than conventional aluminum or galvanized metal weather stripping. Further, the present invention is easy to use and can be manufactured in a variety of colors. Two embodiments are shown, one adapted for being disposed over an interface between two solarium panels, and a second embodiment adapted about a single solarium panel forming a corner of a solarium.

Abstract: A composite seismic isolator for a structure having a column or wall to be supported on a foundation comprising first and second seismic isolators having vertical axes. The first seismic isolator is constructed so that it is relatively soft in a horizontal direction transverse to the vertical axis in comparison to the second seismic isolator. A restraint is provided by the second seismic isolator for restraining transverse movement of the first seismic isolator between predetermined limits. The composite seismic isolator is mounted between the foundation and the wall or column to be supported by the foundation.

Abstract: The structure is composed of a base plate, a skid-proof embedding strip and one or two end embedding strips; whereon the base plate is made of copper or aluminum and is extruded to form an elongated strip, an elastic skid-proof embedding strip can be fitted therein and is fixed at one or both sides of the strip by one or two end embedding strips, such structure suits the noble marble, granite, wood block surfaces of stairs, which structure has the advantages of easy assembling, easy exchanging, changeable of its color according to the changing of seasons, and having excellent skid-proof effect.