Abstract: A combined bending and cutting machine suitable for bending and cutting metal plate has a frame and a female bending die holder extending transversely across a lower part of the frame and supported thereby. The female die holder has a transversely extending upwardly-open recess for receiving a female bending die. A male bending die holder is mounted on the frame above the female die holder for vertical movement relative to the frame and female die holder, and a male bending die is mounted on a lower end of the male die holder. The male die holder is movable towards and away from the female die holder to bend a metal plate positioned between the male and female bending dies. A transversely extending clamping member above the female die holder is movable towards and away from the female die holder to clampingly engage a metal plate mounted on the female die holder.

Abstract: A wire stripping apparatus with a mechanism which cuts lead wire to a specified length, and peels off the covering of both ends of the wire before wiring it; through the attachment of a supply finger which conveys the wire to a predetermined position on the printed circuit board or similar for fixing, and positions it there, the device can supply the wire thus obtained to the next process. An automatic wiring device which can automatically perform wire coiling and soldering in a process continuous with the construction of said wiring by combining the work of this wire stripper with an automatic coiling and soldering device.

Abstract: Elongated thin strip stock is blanked to form interlocking laminas for electric motor or generator rotors or stators at successive blanking stations. At a final assembly station the laminas are stacked and pressed into interlocking relationship. In response to an operator input a predetermined number of reversals, or half turns about the stack axis of the previously stacked lamina are provided in order to compensate for nonuniform strip thickness to obtain a rotor or stator of substantially uniform height. Alternatively the thickness of the strip stock is gauged at transversely spaced points on the strip to determine cross feed thickness variation in the strip whereupon the stacked laminas are automatically provided with a number of reversals about the stack axis in response to a thickness differential that would result in a parallelism error in the stack that exceeds a predetermined amount.

Abstract: Slant gap magnetic heads, comprised of back-to-back wedges, are produced by an inventive procedure: Bars of discrete coil-wound thin-film heads--which bars are, cross-sectionally, L-shaped--are stacked with respect to each other. By dicing through the stack of bars at an angle commensurate with the degree of gap-slant, discrete slant gap head structures are produced. With minimal contouring/lapping, such head structures may be finished for use in recording equipment that records chevron-like alternating skewed information tracks.

Abstract: A vehicle assembling-and-feeding system comprises an engine/suspension feeding line which travels through an engine assembly line and a first suspension assembly line for assembling one of front and rear suspensions to feed the engine and said one suspension, a suspension feeding line which travels through a second suspension assembly line for assembling the other suspension to feed the suspension, a body feeding line for feeding a vehicle body in indexed feed fashion, a slippage detecting station which is provided midway along the body feeding means to detect slippage in the position of the vehicle body fed by the body feeding means in indexed feed fashion, a mounting station disposed downstream of the slippage detecting station, and a mingling feed line which alternately feeds to the mounting station the material fed by the engine/suspension feeding means and the material fed by the suspension feeding means. An automatic mounting device is provided at the mounting station.

Abstract: This hooking device is fastened to the choke plug (8) for guide tube (2). comprises of catches (54) regularly arrayed along the periphery of the flange (9) of the choke plug (8) and hooks to the upper spacer (4S) of the guide tube (2). It is kept in the engaged position by a spring system (56-58), 63-65) and can disengage by means of a tool means comprising a roller (77) acting on each catch (54) and a rim (68) resting on a muff (56) acting as a rest also for the spring (57).

Abstract: A heat dissipating assembly for solid state component and control circuitry therefor including a first printed circuit board [45] having a printed circuit thereon for making connections with electronic components [47], fixing the components to the first circuit board, bending the conductors [49] attached to the components to receive a second circuit board [52] that includes control circuitry for the components, and assembling the joined boards into a housing [40].

Abstract: Automated positioning apparatus for positioning multi-contact components on a circuit board utilizes automated members having a high degree of repetitive movement but not in themselves accurate, such member being relatively inexpensive. A positioning member picks up a component and moves it over a first viewing head. The component is viewed and its orientation determined. A viewing head on the positioning member is then positioned over a target on a circuit board and its position and orientation determined. The results enable the positioning member to position the component on the circuit board in the correct position and orientation. The viewing heads are calibrated for aspect ratio and pixel dimension. Also, the field of view of the viewing heads are calibrated for orientation relative to the positioning member. The position and orientation of the viewing head on the positioning member relative to a pick-up member on the positioning member is also obtained.

Abstract: A precision apparatus for controllably shearing a thin workpiece of electrically conductive material to make electrical contacts of the character having specially configured spaced apart tongues adapted to mate with plug connectors of standard design. The apparatus is designed to rigidly support the workpiece except in the precise area of the shear during the entire shearing step.

Abstract: Methods and apparatus for stripping insulation from low profile high performance cable are disclosed. The apparatus includes hand-held tools with an aperture at each end for sequentially slicing or cutting predetermined layers of insulation from the cable at predetermined lengths from the end of the cable being stripped. The methods are for performing these steps whether performed by the tools, by a hand-held knife or by automated machinery.

Abstract: According to the invention, a pizza cutting device is provided comprising an elongate handle, a cutting wheel with a peripheral cutting edge and a hub having a bore with a central axis and structure for removably assembling the handle with the cutting wheel so that the cutting wheel is guidingly rotatable relative to the handle about the hub central axis. The handle has spaced bearing surfaces which stabilize the device during use.

Abstract: A numerically or manually controlled moving carriage drafting machine with digital X-Y position and angle indication, input keyboard, ruler holder and lowering mechanism for tubular pens or similar writing instruments at the drawing head is particularly characterized in that the drawing head contains an X.sub.1 -Y.sub.1 writer with high dynamic range and small working range only for lettering and small sized symbols whose path instructions are superimposed by the same computer alternately also to the X-Y drives of the moving carriages, and that all movements of the drawing head originate as selected from a movement sensor which is guided manually by the hand of an operator as well as from a path computer, with all operating and path driving programs at least capable of being recalled from the keyboard at the drawing head.

Abstract: The invention relates to an invention for compensating for play in a measuring system in which a measuring arrangement is connected via a mechanical transmission system to a body, the movement of which is to be measured, and in which the measuring result is processed in an electric signal processing unit. The moveable body is provided with a friction coupling and a friction rod extends through the friction coupling. The rod is provided with a stationarily mounted arrangement which counteracts movement of the friction element and detects the occurrence of a counteracting force. This force can be detected electrically. The signal processing unit has a control input which is connected for sensing the arrangement and processes solely signals obtained from the measuring arrangement when a counteracting force is detected.

Abstract: A method for establishing the driving direction of a motor vehicle is suggested with an electronic compass which is provided with a magnetometer having two probes being turned by 90.degree. with respect to each other and an evaluation circuit. For establishing the ground field (He) and its angle (.phi.') in a vector diagram (X,Y) at first the measuring points (M1 . . . M4) with the maximum and minimum values (x,y) of the elliptical polar frequency (O) of the magnetic field (H) measured on the magnotemeter by turning the vehicle are picked up and from this the vector of a fixed interference field (Hs) with the coordinates of the center point (P) is established as a parameter of the polar frequency (O). Thereafter, the measuring points (M5 . . . M8) of the magnetic field (H) with the maximum and minimum distances of the points on the polar frequency (O) with respect to its center point (P) are picked up and from this the length of the semiaxis (a,b) are established as parameters of the polar frequency (O).

Abstract: A pendulum has a weight suspended from a bar at an essentially frictionless pivot near the center of gravity of the weight.

Abstract: A mount on the probe head of a coordinate measuring machine is described. For rapid change of a probe pin carrier, accommodating at least one probe pin, which is drawn against a bearing which clearly determines the position of the probe pin carrier in the probe head, a mechanical clamp mechanism, which acts on the bearing part of the probe pin carrier, and compression-creating and tension-creating media, actuating the clamp mechanism, are provided in the probe head.

Abstract: According to this invention, a drying machine includes detection electrodes arranged to face the interior of a drum constituting a drying chamber and to be capable of contacting clothes in the drum, a volume (weight)-of-clothes detecting circuit for detecting the volume of clothes based on a contact interval of the clothes to the detection electrodes upon rotation of the drum, an operation time display circuit for calculating an operation time based on the weight of clothes detected by the volume-of-clothes detecting circuit and causing a display to display it as an estimated time, a degree-of-dryness detecting circuit for detecting a degree of dryness based on the resistance of the clothes contacting the detection electrodes, a volume-of-dryness setting circuit, operable by a user, for selectively setting a plurality of target degrees of dryness, a remaining operation time determination circuit for determining a remaining operation time based on the degree of dryness detected by the degree-of-dryness detecti

Abstract: A drying apparatus for sheets of sliced veneer has two conveyor belts lying one above the other running together jointly around a partially curvilinear, looped path guided by a plurality of guide apparatuses, the belts being positioned so that the sheets may be inserted between the belts for transport in a direction transverse to their widths, wherein the conveyor belts run rectilinearly between at least two of the adjacent guide apparatuses for a distance at least equal to half the maximum width of the sheets fed between the belts. The guide apparatuses may be rotatable cylindrical structures, for example rollers or cylinders, whose axes of rotation preferably all lie in the same horizontal plane. These rotatable cylindrical structures may be provided with brakes, drying and heating units as well. Furthermore the drying apparatus provides a velocity difference between the belts of from 2% to 5% and the belts passing between adjacent pairs of rollers are inclined at angles from 30.degree. to 75.degree..

Abstract: A peat harvesting machine having a peat collecting tank, and at least one collecting head with a peat inlet connected to the tank. Means are provided for setting the peat inlet at an optimum height above peaty ground to collect the peat. Means are provided on the machine for drawing peat up into the head and into the tank as the machine is moved over the ground. Means are also provided for automatically adjusting the height of each inlet as the machine moves to maintain each inlet generally at the optimum height irregardless of the changes in the contour of the ground.The invention is also directed toward a method of harvesting peat using the above machine.

Abstract: The invention relates to a track maintenance vehicle having a levelling attachment secured to a transverse carrier member at its rear. The levelling attachment faces downwards and is at least partially flexible. For achieving satisfactory levelling of relatively loose snow as well as of encrusted or compacted snow, the levelling attachment comprises a leading portion of triangular cross-sectional shape secured to the transverse carrier member along a first triangle side. The second triangle side of this portion is formed as a rigid compaction surface extending downwards and rearwards from the transverse carrier member. Connected to a rear portion of the compaction surface is a plate-shaped flexible portion extending substantially parallel to the second triangle side in the relaxed state, and in a substantially horizontal direction when under load.

Abstract: A lightweight compact, portable, advertising display apparatus provides an attractive, rotatable, miniature billboard assembly for displaying advertising material to viewing areas about the advertising display apparatus. The advertising display apparatus includes a plastic shaft with a convenient handle and a special coupling head which fits into corresponding keyholes in the container assembly to provide for easy assembly and disassembly of the unit when inserting and removing different advertising material.

Abstract: A polygonal frame comprising a plurality of framing pieces and the same number of assembly devices. Both ends of each framing piece are slanted so as to fit together with matching slanted framing pieces. The rear side of each framing piece is set with an oblong recess and a longitudinal slot on an appropriate position proximate to each end thereof. Each assembly device comprises: an L-shaped assembly plate which consists of an L-shaped plate portion, two inclined supporting blocks disposed under opposite sides of the plate portion, and an L-shaped supporting rail with each of its two ends connecting to the two opposite supporting blocks; two inclined fastening blocks, each having a lengthwise groove on its lower central portion and a threaded vertical hole to enable a screw to go through; and two screws for engaging with the fastening blocks.

Abstract: The slide frame is made of elastic plastic and has an entrance slit which is adapted to be expanded throughout the width of the transparency to be inserted. The frame is formed at its opposite end with an additional expansible slit, which is also adapted to be expanded throughout the width of the transparency to be inserted and to such an extent that the two frame portions defining said additional slit do not obstruct the complete insertion of the transparency into the frame, and the film bed is constricted by a clamping rib, which is formed at and extends along a picture gate defining edge which extends at right angles to the direction in which the transparency is inserted into the frame. The slide frame comprises two frame members having broadsides facing each other.

Abstract: A display device having a collapsible display board which removably receives pictures which are intended to be displayed. The display board can have affixed to its back a support receiving means, the receiving means further being collapsible. In one mode the receiving means receives a supporting pole member which is itself supported by a polyhedral base such that a free standing display board is formed. The polyhedral base is collapsible into a substantially flat configuration for storage. In a second configuration, the support receiving means receives an L-shaped supporting bracket which can support the display board in its display mode on a flat surface such as a countertop or desk. This bracket is further collapsible for storage. Thus, by utilizing either of the supporting structures, the display board can be supported in either the free standing mode above the polyhedral base or can be adapted for mounting on a countertop display surface.

Abstract: A commerical merchandising unit for displaying products offered for sale is integrally provided with a device displaying moving merchandising message indicia. Fixed merchandising message indicia may further be integrally combined in the general vicinity of the moving indicia. The integral appearance of either the moving indicia, or the fixed and moving indicia, combined with a merchandising unit, such as a refrigerated display case, significantly enhances the merchandising affect of the merchandising indicia.

Abstract: A message board has a back plate, strips bearing alphanumeric characters and being secured to the forward surface of the back plate, and a see-through face plate attachable to the back plate and communicating with character strips in such a manner as to prevent displacement. The back plate is preferably provided with locating pins projecting from a forward surface thereof to receive the character being strips thereon prior to attachment of the face plate. The strips have apertures for receiving the pins therein. Alternatively, magnetic strips and ferrous elements are used for magnetically securing the strips to the back plate.

Abstract: A light beam target designator includes a first beam generator and a second beam generator. The beams are aligned so that they may be selectively directed to a common beam deflecting mechanism which allows for deflection of the beams to compensate for windage, distance to target, and the like. Typically, the first beam generator is a visible light laser and the second beam generator is an infrared laser. In this way, a single target designator is provided which is useful both at night and during the day.

Abstract: The invention comprises a pair of vertically-opening door or panel members that are each hinged to a bracket member, and are attachable to the upper edge or rim of standard duck blind units, one on each side of the blind. Each panel includes a spring member extending generally perpendicularly across the hinge to the bracket, so that as the panels are closed horizontally over the blind, the spring is first stretched to a position of full extension, and is then slightly retracted, to enable the panel to stay in its down position. When the panels are contacted from below, as by a hunter standing erect within the blind, the panels are urged slightly upward, and the spring is thus stretched back into a position of full extension, and then past such full extension, causing the spring to then fully retract and move the panels about their hinges up and away from each other and the blind. After the hunter has fired, the panels can be manually returned to their down position, and the cycle repeated.

Abstract: The present invention is directed to a fishing rod (10) that is capable of providing a selectively variable action. That is, the rod (10) can be changed from a stiffer to a softer action not only while the rod is being prepared for casting a lure but also while the rod is being used to play a fish. The rod (10) has a sheath (13) with a handle (11) secured thereto such that the sheath (13) extends forwardly of the handle (11). The line and tip guides (14 and 15) are affixed to the sheath (13). The interior of the sheath (13) defines a hollow, preferably conical, cavity (25) that extends for at least one half the length of the sheath (13). A blade (30) that is preferably tapered in conformity with the taper of the cavity (25) within the sheath (13) is received within the cavity (25), and means (31) are provided selectively to translate the blade (30) longitudinally within the cavity (25) and thereby selectively vary the action of the rod (10).

Abstract: A non-diving fish lure having a fish hook with a bill, and a spherical body. A spoon is implanted into the lower portion of the spherical body and angles upwardly until an end of the spoon is on a common horizontal plane with a section of the bill. A method for producing a fish lure.

Abstract: A needle which is particularly adapted for use by sport fishermen to catch game fish includes an elongated wire-like body. Ends of the needle body are shaped into points. An end barb is then formed immediately inward from each end point. The needle further includes a pair of spaced apart intermediate barbs positioned inward from the end barbs. The end barbs and the intermediate barbs each extend outward from the needle body in opposite directions respectively. During use, an end of a fishing line may be knotted about a middle portion of the needle body between the intermediate barbs. Then, the needle may be baited with an earthworm or minnow, for example, and dropped into a game fish containing body of water such as a lake or river to attract a hungry fish. When a fish strikes and swallows the baited needle, one of the pointed ends and end barb typically pierces the mouth of the fish. The end barb prevents retraction of the needle. The hooked fish then may be reeled in and landed.

Abstract: A fly trap comprised of a pair of upper and lower superimposed synthetic plastic trap sections defining an interior fly capturing chamber therebetween. The lower trap section has a centrally located upwardly dished fly collecting pocket with a fly admitting orifice in the dished pocket but disposed in spatial relation to the upper trap section. Fly trap supporting legs are projected beneath the lower trap section permitting flies to move beneath the lower trap section and into the dished fly collecting pocket. A fly bait locating area is located immediately beneath the fly collecting pocket between the legs. Attachment structure is provided at adjacent confronting edges of the upper and lower trap sections which includes resiliently yieldable detents disposed in an annular ring-like configuration securing the sections in assembled relation with one another.

Abstract: A clamp and system which incorporates the clamp for laterally supporting the stems of plants and the trunks of small tree saplings. The clamp is attachable to horizontal and vertical support structure such as a post, wire, rod, and larger walls or the like. The clamp has an arcuate body with opposing concave and back surfaces, the concave surface shaped to receive and partially surround a plant stem or tree trunk. Disposed from the back surface or at each end of the arcuate body are a pair of opposing spaced clips adapted to lockably receive an elastic member such as a ring or length of cord. These clips may also serve as retainers for another elastic ring which cushions the plant stem or tree trunk against the concaved surface. The arcuate body includes a mounting post extending from the back surface between the clips having a longitudinal aperture therethrough for receiving a hammered or threaded fastener to be embedded into a suitable support structure so as to secure the body thereto.

Abstract: A trellis for supporting horizontal wires to train grape vines whose canes grow upwardly. The trellis comprises a post which is set in the ground and a pair of tubular metal arms attached at their lower ends to opposite sides of the post, the arms having a bend therein to create above ground a symmetrical goblet-like form in which the portions of the arms above the bends diverge outwardly with respect to the post. The arms are bridged by a rigid cross brace which is attached at its ends to the arms at a point intermediate the bend and the upper end thereof, the brace being secured to the post to rigidify the structure. Bored at corresponding positions in the arms are three sets of holes, one set being adjacent the upper end, the other at about the intermediate point, and the third at about the bend.

Abstract: An automatic door including a door body connected to a chain or belt extending between and wound around a drive pulley disposed on one side of a door opening and a driven pulley disposed on the other side thereof in which the door body is actuated to open and close by allowing the drive pulley to be rotated forwardly or reversely by an electric motor connected through a main switch and a controller to a main electric power supply source, comprises an apparatus for automatically moving the door body to its closing-stop point when the supply of electric power to the motor is interrupted by the OFF operation of the main switch, and a locking apparatus for automatically locking the door body in its closing-stop position at that time.

Abstract: An environmental barrier device which fits between an open door of a building and the door jamb in order to enclose the open space therebetween and through which hoses, electrical wires, tubing, piping, etc., may pass. The device allows access to and egress from the building while in use and yet seals the open space against loss of heat or coolant, and also prevents pets, insects, or the like from passing through the open space during the time the door is necessarily open.

Abstract: This disclosure relates to an access door assembly for a ceiling. The assembly includes a frame adapted to be attached to supports of the ceiling and mounted in a generally horizontal position, and a door which fits within and has one edge hingedly connected to the frame. The hinge enables the door to swing between a generally horizontal closed position within the frame and a lowered open position. A constant-force return spring urges the door to the closed position, and an automatically engageable lock is provided for holding the door in the closed position. The frame and the door have closely adjacent Z-shaped frame members and the door is made of heat-resistant material, to form a fire retardant construction.

Abstract: An alignment sleeve (66) for holding two conically shaped portions (30-30) of plugs (24-24) each of which terminates an optical fiber (25) includes two conically shaped cavities (68, 70) communicating through a common minimal diameter plane (72). After the sleeve has been molded, a tool (100) faced with an abrasive material is inserted into each cavity of the sleeve and turned rotatably while a force is applied in a direction parallel to the longitudinal axis of the tool. This causes material to be removed from the walls defining the cavities so that when the two plugs are inserted into the cavities, the axes of the fibers will be aligned coaxially and the end faces of the fibers will have a predetermined separation. The methods of this invention also may be used to adjust a length measurement of plugs. This is accomplished by inserting a plug into a conically shaped cavity of a tool.

Abstract: A process and apparatus for improving the finishing of silicon wafers intended for use as a base plate of an I.C. device. After the wafer has been cut from a silicon crystal and initially ground, then a slurry of water and silicon carbide particles is blasted against the surface to create a mattelike satin finish. This surface is then lapped to provide a mirrorlike finish.To perform the method, the wafer is disposed in a cuplike fixture constructed of resilient material, which fixture defines a cylindrical recess which is of a diameter slightly greater than that of the wafer. The fixture has a support projecting upwardly from the bottom wall and defining an annular drainage passage therearound, which support has the wafer positioned thereon. The blasting media is ejected into the fixture to finish the surface on the wafer, and the slurry drains downwardly around the edge of the wafer into the annular drain passage, and then out through outlet openings which project radially through the wall of the fixture.

Abstract: The present invention relates in general to a roof construction and more particularly to a roof composed of a main spanning arch or arches above or beneath which other arches or arch sections rotate horizontally for the purpose of covering large areas such as stadiums, arenas, or storage and manufacturing areas, which roof can be moved from an open position where the area is exposed to the weather elements to a closed position wherein the area is shielded from the weather elements.

Abstract: The present invention relates to a post comprising a hollow elongated body (1) and rods (2) adapted for static cooperation therewith and so interconnected that said cooperation is interrupted when the post is subjected to local transverse stresses of a predetermined magnitude.The novel features of the invention reside in that the hollow body (1), which is manufactured by extrusion, is provided with a number of per se known internal grooves (5) forming rupture lines and, at least two inwardly open channels (8) defined by inwardly projecting tongues (7), and in that the rods (2) are accommodated in the channels (8), suitably under prestress.

Abstract: A split masonry block (50) formed of concrete-like material is provided with primary split surface areas (52, 54) and secondary split surface areas (56, 58, 60, 62). A wall (86) is constructed of such blocks so that the primary surface areas (52, 54) in one course are in vertical alignment with primary surface areas in adjacent courses, and the secondary surface areas (56, 58, 60, 62) are placed likewise. A composite module (10) is provided from which split blocks are formed.

Abstract: A marker assembly for permanently locating underground utility elements with a non-removable plastic stake and a tamper-proof marker held in place by the stake.

Abstract: A foundation system is provided for permanently installing manufactured homes on footings set into the ground. Vertical support members are mounted on the footings at ground level. Attached to the top of each vertical support member is a vertically adjustable load bearing plate which provides support for the frame of the house. The bearing plate includes means for engaging a longitudinal frame member on the underside of the house to anchor the house securely to the footing. In addition, the foundation system includes overlapping corrosion resistant fiberglass panels attachable to the base perimeter of the house. The panels are constructed with vertical ribs to provide strength for defining a retaining wall against backfilling around the outside perimeter of the house.

Abstract: A picket for anchoring objects to an article is disclosed. The picket includes multiple helically-shaped members disposed about a common longitudinal axis and connected to one another. In one embodiment the object sought to be secured is placed between the end portions of the helically-shaped members and the picket is rotated into engagement with the surface thereby trapping the object sought to be secured between the helically-shaped members and a connecting means. The multiple helically shaped members increase the surface engaging force and permit the object sought to be anchored to be placed in a desired location on a surface and anchored without requiring the use of additional connecting means. In other embodiments an anchoring portion of the picket is integrally formed with, or fixed to, a generally cylindrical collar portion to provide both secure anchoring and lateral stability. A dental application for anchoring a dental prosthesis to a bone structure is also disclosed.

Abstract: A ground anchor adapted to be driven into the ground using a driving tool socket affixed near the leading edge of the anchor is disclosed. The anchor comprises a generally flat plate having a hinged, serrated tail flap. After being driven into the ground the anchor is secured in place immediately, without lifting, when tension is applied to a strap attached thereto.

Abstract: A window of a transparent material suitable for closing an opening in a wall of a sealed container, which window has two conical portions whose bases face each other. An elastic seal is interposed between each of the conical surfaces and the wall of the opening.

Abstract: This invention relates to a curtainwall system having panels mounted on a grid formed of vertical and horizontal mullions having a planar or flat exterior surface. Each of the panels is provided with a frame formed of hanger sections having a groove facing the interior of the frame. A panel engaging clip has one end inserted in the groove of the hanger frame and the other portion of the clip secured to the grid. The clip urges the hanger against the weatherstripping of the grid to provide an air and dust tight seal. A polyurethane block is mounted in the space between adjacent panels and thereafter a silicone is extruded into the space.

Abstract: A decorative suspended ceiling system in which panels containing strips of decorative material, such as wood, are designed to be installed in connection with a standard metal grid system. The panels are laid in place in the grid and are therefore easily removed for access to the area above the suspended ceiling. When installed, the grid is camouflaged by the panels giving the appearance of a free-flowing ceiling with uniform spacing between all of the decorative members.

Abstract: A roof panel (1), which includes a support course (12) for supporting a water-impervious layer (11) or for supporting a windproof layer. The roof panel additionally includes a lower diffusionproof layer (15) and normally one insulating course (14) located in the region between the lower diffusionproof layer and the support course. The roof panel is disposed with a frame (16) which forms the outer edges (20-23) of the roof panel, in addition to which the frame along opposite edges is disposed with devices in order to affix adjacent roof panels in relation to one another and in order to affix the roof panels to a substrate (4) such as a roof truss, a support wall etc.