Abstract: An insulated container comprising first and second container sections. Each of the container sections includes a frame section and a housing section of foam plastic mounted on the frame section. A hinge couples the frame sections together for hinged movement between a closed position and an open position. A thermal pack is mounted within the container. A latch releasably holds the container sections in the closed position, and a handle is coupled to the frame sections to facilitate carrying of the insulated container.

Abstract: A picture hanger locator package is provided comprising a long cardboard backing strip mounting one or more picture hangers at one end. Adhesive areas are provided on the front and back faces of the backing strip and the package assembly may include a protective covering. The hook portion of each hanger is mounted on the mounting portion of a picture frame and the front adhesive area may be pressed against the picture frame so that it is held in a proper position relative to the frame as the frame is positioned against the wall. The elongated backing sheet projects above the picture frame and, after proper positioning of the picture in its desired location, the back adhesive area is pressed into firm engagement with the wall so that the hanger is adhered to the wall at its proper location. The picture frame is then removed from the hook and the hanger is securely fastened to the wall in a conventional manner.

Abstract: A security display rack for articles comprising an elongated outer channel having first and second legs, a web interconnecting the legs, and a plurality of notches extending through the legs and opening at the outer edges of the legs. An inner channel having first and second legs and a web interconnecting the legs of the inner channel are received in the outer channel with the legs of the inner channel extending from the web of the inner channel toward the web of the outer channel. A plurality of pins is carried by the web of the inner channel and is adapted to engage one of the articles with such article projecting through the grooves in the outer channel. A locking member is mounted on the channel for opening and closing the ends of the grooves.

Abstract: A device for display, storage, and selection of garments and a method for dispensing of said garments.

Abstract: An eye glass, ring and watch wall mounted holder including a mounting means for attaching the holder to a wall, an eye glass holder member connected to the base for holding eye glasses, a depression in the eye glass holder for holding rings and a watch strap holder member for holding wrist watches. In some forms of the invention a stop member which may in some cases be decorative is attached to the holder so as to prevent the eye glasses from slipping from the holder.

Abstract: A holder for stiffly flexible sheets such as flooring samples which are likely to curl at their edges and corners. The holder has a proximal edge, a distal edge, and two side edges connecting the proximal and distal edges. The edges form a top central opening through which a sheet in the holder can be seen. Each of the four edges has a top rail to restrain the sheet from upward movement. The proximal edge has a bottom restraint and an edge restraint to restrain the sheet at that edge. A bottom support extends across the area bounded by the edges to give underlying support to the sheet. The top rail at the distal edge is shaped concavely to form a deflector to deflect the leading edge of a sheet inserted into the holder. Mounting pins can be provided for mounting the holder to a stand. The deflector deflects the leading edge of the sheet which it confronts into a channel. Mounting pins can be provided for mounting the holder to the stand.

Abstract: A ring supported, self-propelled truck crane and method of operation is disclosed wherein a boom is mounted on the chassis for pivotal movement only about a horizontal axis. The chassis is driven into an incomplete segmented ring set up at a working site with rollers on end portions of the chassis projecting downwardly and overlying the ring when the ring opening is closed by adding an additional segment thereto. The ring is then elevated to lift the wheels of the chassis completely off the ground and drive means interconnect the ring and the chassis to rotate the chassis about the vertical axis of the ring. Flanged rollers journaled on the chassis engage the ring to center the chassis on the ring and to rotatably interconnect and support the ring on the chassis for transportation therewith to the next site when the ring and chassis are lowered for support entirely upon the wheels of the truck crane.

Abstract: This disclosure relates to a closure for a tube or bottle. The closure includes a cup-shaped cap that fits over the opening of the tube or bottle, a tubular closure member that is mounted around the cap, and a plurality of ribs that connect the cap and the closure. The cap and the closure are radially spaced and the ribs extend at a slant or pitch angle relative to a radial line. The ribs all slant in one direction when the closure is in the open or at-rest position. To seal the opening, the member is turned angularly to decrease the pitch angle, which action bends or flexes the cap radially inwardly against the tube or bottle. The member is turned sufficiently far to bend the ribs over center so that they slant in the opposite direction, in order to lock the closure on the cap or closure.

Abstract: An adapter closure for a container including a body portion, an axial passage extending through the body portion, an inwardly extending shoulder portion disposed along the length of the body portion intermediate the ends thereof, a first internally threaded section extending from one end of the body portion toward and terminating closely adjacent to the shoulder portion, and a second internally threaded section extending from the opposite end of the body portion toward and terminating closely adjacent to the shoulder portion.

Abstract: A vendor for packs of cigarettes comprising a cabinet having a window at the front, a plurality of dispensers in the cabinet for the packs, each adapted to hold a plurality of packs of one brand in a row extending in rear-to-front direction in the cabinet, the dispensers being arranged in tiers one above another in the cabinet with a plurality of dispensers located side-by-side in each tier. The tiers are slanted upward from rear to front, and each tier above the lowermost tier overhangs the tier next below at the front. A transparent panel fixed in place at the front of each tier is engageable by the forward packs of the rows in the tier, the fronts of the forward packs being visible through the window and the panel. The forward pack of a row is dispensed, upon its selection by a purchaser (and accompanying deposit of an amount sufficient for its purchase), by being pushed down from behind the respective transparent panel, and drops down to a delivery pan located below the window.

Abstract: A device for orientation and transport of elongated objects such as tree plants comprises a container having an inclined bottom member which is movable to generate an outlet slot which successively widens upon the movement thereby causing the object resting upon the bottom member to take an upright position when the slot has reached such a width that the center of gravity of the object may enter the slot. The device also comprises apparatus for ejecting plants out of plant pots and a funnel shaped member provided below the container.

Abstract: A ticket dispenser having a hollow body receiving a stack of tickets in its upper portion, a ticket pushing head in the body and pressed upward by a spring, the body guiding movement of the head along a vertical axis, a ticket exit slot at the top of the forward side of the body, a ticket manipulation opening on the upper side of the body, the upper side of the body being substantially inclined with respect to the axis so as to make easier the pushing out of tickets, the body having one or more access openings therethrough to assist in manipulating tickets, and a strap on a side of the body to facilitate holding.

Abstract: A manually operable dispenser pump construction wherein liquid product is received from a supply container into an axially compressible bellows. A product discharge assembly including a valve is associated therewith and adapted to move between open discharge and closed storage valve positions by collapsing movement of the bellows. In a preferred form of the invention, the bellows includes a trigger mounted to a relatively rigid front wall portion thereof. The bellows of such form is fluid sealingly snap engaged with a housing portion of the product discharge assembly and a pivot area about which the bellows front wall and the trigger move is formed by a thin wall area of the bellows disposed below its connection with the housing.

Abstract: An in-line electrically operated dispensing faucet for fluids such as beer and other liquids. A reciprocatable plunger operates in a tubular member relative to a seat. An electromagnetic device is provided for reciprocating the plunger. The plunger has channels to provide for in-line flow through it and through the tubular member between the inlet and outlet. In a second form of the invention, a second in-line plunger is provided in the tubular member and a second electromagnetic device constructed to be powered by way of pulsating DC voltage so as to reciprocate the second plunger is provided. The second plunger is also of in-line construction so that the flow is in line with the axis of the plunger and with the tubular member. The second plunger is restrained by a spring and is able to engage the first plunger so as to intermittently interupt flow through the first plunger for purposes of creating foam within the tubular O-ring.

Abstract: A foldable support rack for carrying bicycles on a vehicle, comprising a pair of vertical support members joined at their upper ends by a cross member, provided with horizontally projecting carrying members and supported on the vehicle bumper as an upright rectangular array. Interconnections between support members, cross member, and carrying members allow rack to be easily folded to minimum volume for storage, and extended and locked into open configuration for use. Means are provided for attachment to a variety of vehicle configurations without use of tools.

Abstract: This specification discloses a carrier for holding containers having a flange or rim toward an end, the carrier including, a top panel able to lie superimposed over a central part of one side of the flanges to be held and prevent relative displacement of at least one side panel connected to a longitudinal edge of the top panel by a line of hinge, the line of hinge crossing over an outward part of each flange end, the side panel provided with slot cuts each defining an edge of the side panel able to engage the underside of such outward part of the flanges when the side panel is moved angularly toward the containers, the improvement characterized in that the side panel for engaging the flanges is an intermediate single panel stretched tightly around the container below the flanges rather than a clip action which relies upon the resilience of the paperboard alone, or an action which results in the stress resulting from the engagement being divided.

Abstract: A carrying sling for a generally cylindrical shaped scuba tank of the type which has an axially projecting valve control at one end and which has a closed lower end and wherein the carrying sling is composed of an end boot to nest about the lower end of the tank and a flexible strap with one end connected to the boot or end cup and the other end having a ring about it to connect over the extending valve control at the other end of the tank, so that the strap may be utilized to carry the scuba tank conveniently.

Abstract: An advancing tape is guided with a tape guide which is provided with a taper. The advancing tape is applied to the tape guide and a guiding force is imposed on the advancing tape with the aid of the taper. This guiding force is varied by adjusting the taper.

Abstract: A split-type injector for flexible drill tubing includes a pressure cylinder connected to linkage which maintains an adjustable pressure of the injection dies upon the tubing passing therethrough. The individual dies on the endless chain are constructed to grip components and tubing of different diameters which passes therethrough and also by means of a relief valve in the pressure system, to widen and close up as different diameter components or tubing pass therethrough. For example if a component such as a coupling is encountered, the halves of the injector move apart to allow it to pass yet at the same time maintain a similar contact upon the coupling and also to maintain similar pressure upon the coupling. When the component has passed, the halves close up and maintain the same pressure and substantial contact area upon the tubing as before.

Abstract: An improvement for a thermostatic control system of the type in which a heater having two electrical terminals is turned on when a conductive path is established between the two terminals and is turned off when the conductive path is opened, and in which first thermostat is used to open and close the conductive path. The improvement is a series combination of a remotely controlled electrical switch and a second thermostat, the series combination being connected to the heater terminals in parallel with the first thermostat. The second thermostat is normally set to a temperature greater than the temperature to which the first thermostat is set. The first thermostat controls the heater to standby temperature until a signal is applied to the remotely controlled electrical switch. Upon receipt of a predetermined signal, control is passed to the second thermostat which thereafter maintains a higher temperature.

Abstract: The control valve for keeping a constant temperature or viscosity of a pressure medium in a hydraulic consumer circuit includes a main control valve provided with a control slider and a preliminary control valve in which a temperature sensitive control element is arranged in such a manner that upon reaching a predetermined temperature of the medium a bypass channel is established between the inlet and the outlet of the valve.

Abstract: A bladder, suitably formed of silicone rubber and molded into a cylindrical shape, is provided internally with a deforming spring. The resultant unit serves as a delivery stabilizer for a ventilation shaft without loss of elasticity of the bladder.

Abstract: An energy efficient heating system is provided for use with a fireplace or like means having a flue which recovers heat which is otherwise exhausted through the flue. The heating system comprises a heat collector in the form of a fluid conduit which is mounted within the flue and a housing positioned outside the fireplace. A holding tank having an open top is contained within the housing while the outlet from the fluid conduit is open to the tank. A drain on the tank forms a fluid outlet which is connected to the inlet of a heat exchanger while the heat exchange outlet is connected via a fluid pump to the inlet of the fluid conductor. Thus, upon activation of the fluid pump, a fluid, preferably water, is continually pumped through the fluid conduit while the exhaust gases passing through the flue heat the fluid. In addition, a fan is provided within the housing which circulates air through the heat exchanger and into the area which is to be heated.

Abstract: The present invention relates to an arrangement for crossings between a road and railway, where the road structure is interrupted between two edges, between which is positioned at least one railroad track, the arrangement comprising two rails supported by a row of sleepers arranged substantially perpendicular to the rails, said sleepers resting on a foundation, outer slabs being deposited in the area between the rails and the respective edges of the road structure, and a center slab, preferably divided up into sections in the longitudinal direction of the track and positioned between the rails forming the railroad track, which slabs are provided with their top surfaces level with the top surfaces of the rails and the top surface of the road structure, and elongated supporting elements provided to extend along said edges of the road structure.

Abstract: A cup-shaped retainer is provided with a side wall having a mounting rim portion joined to one end thereof and a bottom wall joined to an opposite end of the side wall and having a mounting aperture sized to threadably receive a mounting screw. The side wall of the retainer is externally sized to permit insertion thereof inwardly through an access opening formed in a vehicle body or door panel or the like and the retainer is interiorly sized to removably receive a disposable cartridge filled with a corrosion inhibiting material. The mounting screw is fitted with a sealing disc or cover and may be inserted successively through the cartridge and the mounting aperture to puncture the cartridge to permit escape of its contents, to clamp the sealing disc in surface engagement with the outer surface of the vehicle body panel peripherally bounding the access opening and to effect deformation of the mounting rim portion of the retainer into clamping engagement with the vehicle body panel peripherally of the aperture.

Abstract: The disclosure is directed to a center pivot irrigation system capable of operation under high or low water pressure and a constant volume sprinkler head therefor, which together provide uniform water distribution over an agricultural field notwithstanding the presence of hills and valleys in the field, pressure fluctuations of the water source, friction losses or the direction or magnitude of the wind. The system employs a plurality of sprinkler heads each of which provides a constant volume of water to the annular area over which it travels. Because the annular areas increase in size and total water requirements with increasing distance from the center pivot, the water delivering capacity of each sprinkler head is chosen as a direct function of its radial distance from the center pivot, thus insuring the same water distribution to all points on the field. Each sprinkler head is designed to produce a spray pattern that extends laterally outward with a predetermined directional orientation.

Abstract: There is disclosed an oscillating reed particularly for use in generating a sweeping or oscillating air flow pattern which is rendered clickless by limiting directions of bending of the reed element to an axis transverse to the direction of air flow. This significantly silences the oscillations and, in conjunction with polishing of the edges of the reed and rounding the corners of the mounting bar in which the downstream end of the reed is secured, cracking and breakage of the reed element has been substantially eliminated thereby lengthening significantly the life of the oscillating element.

Abstract: A milling apparatus receives solidifiable material and mixes it so as to achieve comminution and blending thereof. Disposed adjacent to the receiving enclosure is a vacuum chamber associated with a port that communicates between the chamber and the enclosure. Movable within that port, in correlation with operation of the mixer, is an agitator of portions of the material which tend to lodge within the port.

Abstract: A frictional tensioning device for use in dispensing a continuous spool of ribbon or tape material under a uniform tension, regardless of the changing diameter of the spool. The device comprises a mounting pin secured to a fixed structure or base plate, the pin extending upwardly through an intermediate resilient base member having a sheet member of very low friction defining a layer disposed on the outer surface of the resilient base member, on which is positioned a thin flexible plate interposed between the frictional sheet member and the spool of tape material, so as to allow the spool and the flexible plate to rotate together about the pin under a controlled compressionable force provided by a spring-biased hub member mounted to the pin and held in the central core of the spool by a nut and a spring, thus establishing a means to apply the required compression on a given type of tape or ribbon being dispensed therefrom.

Abstract: A chucking spindle in a winding device with means for synchronizing the clamping and releasing movements of the clamping elements for the spool or bobbin tube and the gripping elements for the initial thread applied during thread transfer.

Abstract: An aircraft, either rigid-wing or a collapsible hang-glider, is provided which is a bi-plane of apparent annular-wing construction in plan view, but the wing tips of an anhedral foreplane are separated from and above the wing tips of a dihedral aftplane. In a hang-glider construction the wing tips of the foreplane may be supported above the wing tips of the aftplane by struts, the trailing edges of the foreplane wing tips being supported by the struts above the leading edges of the aftplane wings. Also in the hang-glider, the geometry of the fore and aftplanes can be varied by moving their points of connection to the keel therealong.

Abstract: A deployable wing assembly using an inner wing segment and an outer wing segment. The inner wing segment is hinged longitudinally to the body of a missile, or the like, and with the outer wing segment hinged by a pin perpendicular to the surface of the wing segments at the junction, and including deploying and locking arrangements for both sections.

Abstract: A keel kite including brackets slidably mounted on wing sticks thereof. The brackets are spanned by a cross brace telescopically mounted in and connecting the brackets. The brackets can be held at selected positions along the wing sticks. A kite string is attached to the keel. An opening in the keel receives an air activated sound making device mounted on a central keel stick of the kite. The sound making device is actuated by air passing the keel as the kite flies. The sound making device includes a spinner rotatably mounted in the opening in the keel. The spinner is of light reflective material. The body is transparent so that sunlight can be reflected from the spinner in a flashing or sparkling effect.

Abstract: Elongated support members are coupled to the elongated grip portion of a hand-held implement, such as a reading glass, mirror or the like, in a manner such that each support member may be moved from a convergent position where the major axes of the support members lie substantially parallel to each other and to the major axis of the grip portion in contact therewith along a major portion of the length of each support member to a divergent position where each of the support members extends laterally from the lower end of the grip portion with the major axes of the support members diverging outwardly from each other for supporting the implement in a vertical or a near-vertical position, thereby freeing the hands of a user of the implement. The support members and hand-held implements may be held in many predetermined rotated positions with respect to their associated grip portions.

Abstract: A shock and vibration isolation system having a plurality of isolators supporting a utilization device is disclosed. Each isolator has two gas driven pistons, pivotally mounted in a frame and is connected to an accumulator/controller that supplies controlled amounts of pressurized gas. A sensor in each isolator senses the position of the utilization device with respect to a base sitting on the ground, and the accumulator/controller adds gas to or exhausts gas from the pistons to counteract changes in position detected by the sensor. An electronic control circuit is connected between the sensor and the accumulator/controller to supply a properly compensated signal from the sensor to control the accumulator/controller.

Abstract: A valve comprising a valve housing having a flow passage extending through the valve housing and a cavity communicating with the flow passage, a valve seat in the flow passage, a diaphragm extending across the cavity to define a control chamber on one side of the diaphragm and a valve element for controlling the flow of fluid through the flow passage. The valve element is mounted for pivotal movement about primary and secondary pivotal axes. The opening and closing of the valve element is controlled by the pressure in the control chamber.

Abstract: A ball valve is disclosed comprising a single piece body with a ball-shaped, two-part valve member therein operable by a rotatable stem formed separately from the valve member, this stem being so formed that it cannot be blown out from the valve by internal pressure in the valve during servicing.The stem extends from the interior to the exterior of the valve through a stem passage providing, adjacent the chamber which houses the valve member, a first plain bearing supporting a portion of the stem for rotation about the stem axis. The stem has an enlarged portion within the valve chamber which is too large to pass the first plain bearing, the enlarged portion having a shoulder adapted for sealing engagement with a seat formed within the valve body around the stem passage.

Abstract: The valve element and method of making same are characterized by a valve body having at the neck thereof a small radially outwardly projecting annular crimp bead and a resilient tip molded on the body at the neck. To mold the tip, the body is axially aligned and urged into the mouth of an open ended mold to close the cavity therein with the crimp bead engaging and being crimped by the mold wall to effect a tight annular seal about the body periphery thereby to preclude leakage of fluid material introduced in the closed cavity to form the tip, but without the development of substantial pressures in the mold that might cause excessive wear and damage to the mold.

Abstract: An extension for a common trolley type service jack that includes an elongate rigid frame with a tunnel extending inwardly from one end thereof to receive the jacking end portion of the trolley type service jack. The rigid frame bears downwardly on the frame of the service jack adjacent the entry to the tunnel and inwardly thereof are supports for the wheels of the trolley jack. A lift platform is attached to the rigid frame by a lever pivotally attached at one end to the lift platform and at the other end to the rigid frame and overly the tunnel. The lever extends beyond the tunnel and on the free outer end is mounted the lift platform, the lever being pivotally movable by the lift portion of the jack to raise the lift platform of the jack extension.

Abstract: A hot-blast cupola furnace 1 has an inclined bottom 3 leading directly to a tapping conduit 4. The conduit 4 leads to a forehearth 5 having an iron discharge siphon 13, 14, 15 and two slag discharge siphons 16, 17. The forehearth 5 has an upper slag-holding part 10 and a lower iron-holding part 11, which also contains slag in its upper part down to the level of the tops of the siphons 16, 17. The part 10 is of greater horizontal cross-sectional area than the part 11. In this way the height of the slag column through which the iron passes in the forehearth is reduced and so is the area of the boundary layer in the forehearth. This causes the reaction between the iron and the slag to take place predominantly in the main furnace zone above the bottom 3 and not in the forehearth and in this way the life of the lining of the forehearth, which is a limiting factor on the possible continuous period of operation of the furnace, is prolonged.

Abstract: Surface defects occurring periodically in specific regions of the surface of steel material are removed by moving a detector head having a scarfing torch disposed forwardly of a detector probe for scanning along a predetermined path, during which the surface of the scanning path is scarfed smooth and detected by said head, and the surface defects are scarfed away according to the results of the detection.

Abstract: A method and apparatus for quenching heated elongated workpieces by rotatably mounting the heated workpiece in a quench tank and subsequently rapidly flooding the tank with a quenching liquid. The heated workpiece is mounted within the quench tank by engaging opposite axial ends of the elongated workpiece. Transverse deflection of the workpiece is prevented by paired restraints located adjacent the top and bottom of the workpiece near the opposite ends. As the quenching liquid is flooded into the quench tank from a storage tank, the heated elongated workpiece is rotated about its central axis at a fixed speed.

Abstract: The device permits the fixing of a stave plate to the armour shell of the blast furnace by means of a washer and a cup-shaped ring which are welded externally both to the shell and to protecting sleeves for inner water circulating tubes which are extended to outside the shell.The sealing is achieved by the interposition under compression of a preformed flexible apertured rectangular joint element and a preformed circular joint element of silicone elastomer or like plastics material, between the shell and the stave plate with adhesion on the bearing faces. It is completed by an injected mass and an annular joint element between the water circulating tubes and the corresponding protecting sleeves.The device is completed by the provision of packing products respectively between the inner wall of the shell and the stave plates and in gaps between two adjacent stave plates.

Abstract: A manipulator corresponding to the human hand is generally attached to the end of an arm of an industrial robot or remote control apparatus. The improved manipulator herein includes two spaced-apart, rotatable sprockets and a chain which is connected in the form of an endless loop and stretched between the sockets to form two parallel linear segments which move in mutually opposing directions when the chain is rotated. Two fingers for gripping a workpiece are arranged to move in a direction which is parallel to the linear segments by means of guide members, one finger being coupled to one of the linear segments of the chain and the other finger being coupled to the other linear segment. A cylinder is provided for accommodating a piston having piston rods secured to either side thereof. The other ends of the piston rods pass hermetically through both side walls of the cylinder and are secured in blocks located outside the cylinder, the blocks forming the walls of the manipulator.

Abstract: There is provided a light-weight jam clamp in which the clamp is set by a tool and released by the same, or another tool. The tool forces one element of the clamp down against the work piece and causes it to jam on another element of the clamp. The setting tool can be an expansion bit pliers or a contraction bit pliers and the releasing tool is an expansion bit pliers. One face of the other element has serried lands to effect a positive jam action and prevent accidental dislodgment of the jam.

Abstract: A document handler employing a vacuum belt feeder having an air knife to aid in sheet separation. The quantity of air discharged from the air knife is varied in accordance with the number of documents placed in the document handler as determined by counting the documents fed through the document handler during the initial feed cycle.

Abstract: A sheet feeder for separating and feeding the bottom sheet in a stack, a biased corrugating ramp being provided to provide a large corrugation in light weight papers for maximum feeder reliability. The corrugating ramp is adapted to be depressed by heavy weight, stiff sheets to allow the sheets to more closely approach the vacuum feed belts and assure adequate acquisition thereby.

Abstract: The invention relates to a sheet transfer device, for offset printing machines which print on one side of the sheet or on both sides of the sheet of paper, having a means for adjustment to accommodate sheets of different sizes, achieving thereby an accurate register printing.The feature of the device according to the invention is a reset wheel of the sheet transfer drum which is adjustably mounted on a centering flange, on rollers rotatably mounted on eccentric pins mounted in the centering flange. The centering flange has rotatably mounted eccentrics, which bear on carrying projections of the transfer drum body, while the transfer drum reset wheel is fastened to the flange. The clearance between the reset wheel and the flange centering diameter is adjusted by eccentric pins, while at the same time the reset wheel is centered so that its gearing is precisely centered with the transfer drum axis. The clearance of the toothing of the reset wheel is taken up by take-up segments.

Abstract: A pool toy comprising a buoyant body having a central part on which a rider is adapted to be seated, and two end parts, the end parts being raised relatively to the central part and each being of greater volume than the central part.

Abstract: Edging for the track inside of a sports installation consists of a plurality of individual sections (1) abutting at their interfaces, each of which has an upper header body (2) of hard polyurethane synthetic material with a longitudinal slot 2a. Each section at its lower side is connected to at least two spacer pieces (3) of soft, resilient polyurethane synthetic material which rest on a foundation and are releasably connected thereto. Between the spacer pieces (3), passages 4 enable the drainage of water. Each spacer piece (3) has at its lower side an elongate inverted U-shaped carrier rail (5) inserted in countersunk manner and laterally enclosed by spacer piece (3). The hollow space (5a) has fastened thereto an inverted U-shaped spring clip (7), the legs of which resiliently reach under the head (8a) of an attachment screw (8) inserted in the foundation.