Abstract: A pressure operated switch construction and method of making the same are provided, the pressure operated switch construction comprising a housing having an external surface and carrying an electrical switch unit and a diaphragm assembly therein, the housing having an opening passing through the external surface thereof, the electrical switch unit having opposed sides and an opening passing therethrough in alignment with the opening of the housing, and a compression spring unit carried by the housing and being operatively associated with the electrical switch unit and the diaphragm assembly to control the operation thereof in relation to the compression setting of the compression spring unit, the compression spring unit comprising a retainer operatively interconnected to the electrical switch unit, an actuator carried by the housing and a first compression spring having opposed ends respectively bearing against the actuator and the retainer, the retainer having an intermediate part disposed in the opening of

Abstract: An automatic machine for fitting striking plates to prefabricated fixed frames of windows or French windows is associated with a fixed frame feed device. It comprises at least one fitting unit adapted to be displaced automatically relative to the fixed frame. It further comprises at least one second fitting unit adapted to fit bottom striking plates to the fixed frame, in particular for tilt-turn windows. The displacements of the beam, the carriage and the fitting unit are program-controlled to enable the fitting of top striking plates to the top crossmember of the fixed frame and the fitting of striking plates to the uprights of the fixed frame.

Abstract: A multicell storage battery may be assembled to fit various floor space and height requirements by using standardized multicell modules having keyed connector means such that the modules can be connected only in selected orientations which facilitate the electrical connection of terminals. These standardized modules eliminate the need for standard and reverse polarity modules which existed in the prior art, and simplify battery assembly on site while allowing greater flexibility to adjust to space limitations. The keyed connectors comprise mating structures on the sides of the rectangular frame of the modules, which in combination with the modules being configured to stand vertically, create cooling ducts for the cells. An easily installed safety shield encloses the terminals of the cells and provides a front cooling duct.

Abstract: During the manufacture of a printed circuit board, holes are drilled not only in accordance with a particular circuit board pattern, but also along the lines which will define edges of the board at the positions where traces are to appear. All of the holes are then plated through. The holes along the edges of the board are completely filled with solder. The board is then cut along the previously defined edge lines to cut the solder filled holes in half. This creates a trace and a solder reservoir along the edge of the board.

Abstract: An apparatus and process for splicing electrical wires that are to be exposed to an adverse environment. The apparatus includes a connector, an insulating sleeve adapted to retain the connector, and an encapsulant. The encapsulant, which is disposed within the insulating sleeve, has a cone penetration value of 100 to 350 (10.sup.-1 mm) and an ultimate elongation of at least 200%.

Abstract: A method of assembling a peristaltic pump having a motor housing having a driveshaft extending therefrom and a pump housing containing a pump including a rotor mounted on a stub shaft extending through the pump housing wherein the motor housing and the pump housing are detachably connected together. They are assembled by positioning the motor housing and the pump housing so as to axially align the stub shaft and the driveshaft, and moving the pump housing towards the motor housing in the axial direction of the driveshaft so that the driveshaft enters the pump housing and engages the rotor while the stub shaft is urged axially out of the pump housing. When the pump housing contains two or more rotors the stub shaft preserves the alignment of the rotors both during manufacture of the pump assembly and transportation of the pump housing.

Abstract: A method of assembling a reciprocating piston hermetic compressor including a two piece suction valve capable of being deburred by abrasive material. The reexpansion volume between the valve leaf and valve spacer is reduced to a minimum since the clearance between the valve leaf and valve spacer is reduced by the fabrication method. The valve leaf may be made of a different material than the valve spacer using the same or a different stamping tool.

Abstract: A method for the manufacture of the cylindrical mantle (10) of the rolls or cylinders of a paper machine out of a corrosion-proof metal or alloy material, particularly refined steel, comprises cutting oblong plate blanks (20A) of a length equal to the total length of the roll mantle to be manufactured. The plate blanks (20A ) are machined or bent to mantle portions (20) of a cross-sectional shape equal to a part of a circular ring. Out of the mantle portions (20), the cylindrical mantle of a roll or cylinder is assembled by joining the mantle portions (20) together by means of axial welding joints (14) prepared by electron-beam welding performed in the vacuum chamber of an electron-beam aparatus by using a number of mantle portions (20) per one roll mantle (10). A roll or cylinder manufactured by means of the method is also described.

Abstract: An open ended, flat spiral belt is joined at its ends on a roll to form an endless cover. A spiral belt is fitted with a zipper assist in the seam area to facilitate the joining of the spiral belt on the roll. One part of the zipper assist is removably attached to one end of the spiral belt with the other part of the zipper assist being removably attached to the other end of the spiral belt. When the two sections of the zipper assist are zipped together, they pull the two ends of the spiral belt together, allowing for interdigitation of the spiral loops of the spiral belt, which then forms a channel for the introduction of a seam wire. Once the spiral belt is seamed on the roll, the zipper assist is removed and the roll is set in slow motion at about ten revolutions per minute. The entire fabric is subjected to application of heat from a hot air gun to set the spiral belt, now in the form of a spiral shrink sleeve.

Abstract: A tool is provided for the purpose of allowing access to optical fibers held within a monotube of a monotube design optical fiber cable. The monotube is held in a central channel extending the length of and through the substantial center of the tool. The strength members of the cable, which extend longitudinally on both sides of the monotube, are held in channels extending longitudinally with and on both sides of the tool's central channel. A blade is inserted from the main body into the monotube so as to define a chord through the cross section of the monotube. The tool is drawn along the monotube so as to remove a portion of its protective covering thereby allowing access to the optical fibers held therein without having to sever the strength members. Various inserts may be utilized with the main body of the tool, the various inserts corresponding to the different monotube dimensions of the various monotube optical fiber cables.

Abstract: An automotive adhesive emblem remover 10 is disclosed and, in one embodiment, comprises a substantially "C" shaped gripper 12 into which a separator blade 22 is removably inserted. More particularly, the blade 22 is adapted to be placed between one end of an emblem 28 and the surface 20 of an automobile and is thereafter made to traverse the length of the emblem 28 while being moved in alternating and opposite directions, perpendicular to the length of the emblem 28. In a second embodiment, the remover 32 is made of molded plastic, or other such material, and the blade 22(A) is molded within the gripper 12(A).

Abstract: Apparatus for sensing the deviation of an underground storage tank from level which is conveniently referred to as a tank inclinometer. The apparatus, or inclinometer, includes an elongate member having a feeler bar mounted to the end thereof which is aligned with the elongate members for insertion through the restricted opening of the fill neck of an underground storage tank and then pivoted to a position such that, when the elongate members are pulled upwardly, the feeler bar contacts the inside top surface of the underground storage tank. Deviations of the top surface of the tank from level are sensed and an output provided by which the deviation is observed by the operator.

Abstract: A hood for a power tool, such as a grinding wheel on a saw, in which the hood is rotatable relative to the frame of the tool. The tool has a system for repositionably fixing the hood at selected locations. The system includes a detent connected to the hood with a plurality of lock notches and a longitudinally movable lock pin connected to the frame. The lock pin can be positioned into one of the detent notches to prevent the hood from moving and, can be longitudinally moved to disconnect the lock pin from the detent thus allowing the hood to be repositioned. The system includes a knob to axially rotate the lock pin, a cam member to longitudinally move the lock pin upon axial rotation, and a leaf spring to bias the lock pin in an engaged lock position with the hood detent.

Abstract: An apparatus for laying out positions for the attachment of studs having a desired center to center spacing therebetween on a base plate includes a flat layout square which is precisely dimensioned for easily marking stud positions with a marker on the base plate. The layout square includes a short arm and a long arm extending perpendicularly from the short arm. In one embodiment, the short arm has a width which is equal to the actual thickness of the stud, and the long arm has a length from the intersection of the long arm which is equal to the stud spacing. This layout square also includes a dominant indicator adjacent a free end of the long arm which is spaced from the free end by an offset distance equal to one half of the width of the short arm. In one configuration, the indicator is an outside notch in the long arm and may also further include an inside notch in the long arm.

Abstract: In conventional fluidized granulators whose housing is made of a steel plate, a powder tends to cause blocking if it is highly hygroscopic, and the bag filter used therein causes clogging. These problems have been solved in the present invention by forming the housing of a fluidized granulator with a porous membrane in place of the conventional steel plate. This fluidized granulator produces granules or a coated powder by spraying powder with water, a binder fluid or a coating fluid while maintaining the powder in a fluidized state.

Abstract: An elastic band activation apparatus for activating a heat-sensitive thermal film attached to an edge of a body of an article to form an elastic band along the edge of the article. The apparatus has at least one chamber with a heating zone having a shrinkage atmosphere at a first temperature sufficiently elevated to activate the heat-sensitive thermal film to shrink the film to form the elastic band. The chamber may also have a cooling zone with a quench atmosphere at a second temperature which is less than the first temperature to arrest the shrinkage of the heat-sensitive thermal film. An article transporter transports the article through the heating zone and then through the cooling zone. The apparatus may also include two lateral compression bars for spreading apart first and second adjacent edges of an article when transported through the chamber to expose the article interior region to activate first and second heat-sensitive thermal films, thereby forming first and second elastic bands.

Abstract: An alpine ski boot having a curved sole and a rotating boot sole toe. The boot sole toe is rotated upward by hand to allow walking, which is facilitated by the shape of the sole: it is gradually curved from the midsole to the toe. With the boot sole toe rotated down, the boot will engage normally with universally accepted ski bindings and is suitable for any level of skiing. Unlike a conventional boot, the boot sole toe is not in contact with the ground while walking; thus no wear occurs which may hamper binding release.

Abstract: A high velocity pneumatic device for excavating and removing material such as soil. The device includes a pressure tube having an inlet connected to a source of gas, such as air, under pressure and an outlet end connected to the distal end of a removal conduit. An annular member is secured in the distal end of the removal conduit and defines an annular chamber that communicates with the outlet end of the pressure tube. A plurality of first nozzles communicate with the chamber and face outwardly of the distal end of the removal conduit, while a plurality of second nozzles communicate with the chamber and face inwardly of the conduit. A manually operated valve member is disposed in the chamber and rotation of the valve member will selectively discharge air through the first nozzles to provide an excavating action, or through the second nozzles to provide an aspirating action for the removal of material or through both the first and second nozzles to create both an excavating and removal mode of operation.

Abstract: Arrangement for rotator units, especially those which are intended for rotation of excavator buckets. It comprises a motor (27) which, together with a transmission (26, 29) which is coupled to a drive wheel (24) in the chain transmission, is arranged in a movable support (14), which is suspended in the housing (6) in a pivotable manner, but free from fixed connections to the housing. In the transmission there is a drive wheel (24) for a chain transmission, which wheel is connected by means of a drive chain (25) to a driven chain wheel (13) included in a shaft system (12) mounted in the housing. Spring elements (30) are arranged to pivot the movable support (14) in such a way that the chain is held tensioned. The suspension of the movable support in the housing is designed in such a way that deformations of the housing resulting from external force effect are not transmitted to the movable support in a way that would deform the latter.

Abstract: In a support assembly for an excavating dragline bucket controlled by a hoist line and a drag line, the bucket having opposite side walls and an open forward end, a line protection device includes a sleeve for encircling the hoist line adjacent the bucket sidewalls for preventing direct contact between the hoist line and the bucket sidewalls. A sleeve also encircles the drag line adjacent the point of attachment between the drag line and the bucket forward end for preventing direct contact between the drag line and excavating material received by the bucket.

Abstract: Apparatus for melting snow and ice includes hand-propelled wheeled frame on which is mounted a motor and generator and a heater positioned substantially parallel to and spaced from the ground to be cleared of snow. The snow melting apparatus is propelled by a user walking behind the apparatus. The heater includes heating elements which are covered by plates for reflecting heat downward as the snow melting apparatus is moved across snow-covered ground, clearing the area passed over by the apparatus. The heater may include two or more heating units. A forward heating unit may be hinged to a rearward heating unit to allow the forward unit to be raised for ease of moving the apparatus and for storage.

Abstract: A secondary snow removal structure is attached to the back of a primary snow removal device. The secondary structure includes a plurality of individual fingers positioned and arranged to extend below the level of the lower edge of the primary snow removal device for engagement with the surface being cleaned. A separate spring biasing means is provided for each finger for independently extending each finger to follow uneven portions of the surface being cleaned and thereby loosen and remove residual snow and ice compacted and left by the primary device.

Abstract: A multi-channel transparent jacket for accommodating strips of microfilm to create a microfiche, the jacket having non-blocking characteristics, thereby minimizing the tendency of one jacket in a stack thereof to stick to an adjacent jacket. The jacket is constituted by front and rear panels formed of flexible polyethylene terephthalate film joined together by a parallel array of ribs to define the channels. The exposed surfaces of the panels have a friction-reducing layer thereon constituted by a multiplicity of discrete silicon dioxide nodules bonded to the film, the nodule shape approximating a surface segment of a sphere. The peaks of the segments form microscopic contact points which are bonded by molecular attraction to an abutting panel when the jacket is juxtaposed against a like jacket in frictional relationship thereto.

Abstract: A sign of the flexible face type in which, about the periphery of the sign face there is an extension member which is adapted to be received in and retained in a complementary member which complementary means is adapted to be moveable relative to the members of the sign frame to whereby permit tensioning of the fabric.

Abstract: A lock for a firearm is operable to engage and disengage a draw bar or trigger bar of the firearm, which connects the trigger to the hammer. The lock includes a lock member which, in the locked position, operatively engages the draw bar to move the draw bar out of engagement with the hammer. The firearm is thereby rendered inoperative. The lock member, in the unlocked position, permits the draw bar to engage the hammer in the usual manner to permit operation of the firearm. The lock member can be provided as part of a lock assembly which can be readily installed in the firearm, and in a construction which is resistant to tampering.

Abstract: An accessory for ice fishing for preventing the loss of a fish by breaking the line or dislodging the hook while being pulled through the ice hole; the device consists of a handle with a downward extension handle and an ice scoop separated by a downward extension tube whereby the ice scoop is hinged so that the scoop may be brought to the closed position when a fish has been pulled into the ice hole precluding the fish from getting away even if the line is broken or the fish had dislodged the hook.

Abstract: An aliphatic polyurethane film is utilized as the primary glazing material for greenhouses and other heat-gain enclosures such as pool covers and sun rooms. The film is preferably a thermoplastic aliphatic polyurethane film having good abrasion resistance, low temperature flexibility, ultraviolet resistance, and strength characteristics. Lightweight portable greenhouses and modular high-performance greenhouses are made possible by the system.

Abstract: A window having at least one slidable sash which is capable of being pivoted about a central axis. It may include among its features a selectively movable weather-stripping between stiles, a latch between non-rotating and rotating portions of the sash to prevent rotation, double weather-stripping between sash and frame members to optimize integrity of the window against air and water infiltration, and cooperation between the rails and head and still members to prevent the rails from being separated from the frame where the rotatable portion of the sash is in an open, rotated position for cleaning.

Abstract: A leaf (8) can move between an open position and a closed position relative to an opening (3, 4, 6, 7). In the closed position, a front edge (12) of the leaf is engaged in a groove (11) of the front edge (3) of the opening. At the beginning of the opening procedure, a thrustor (24) pivots two arms (18a, 18b), the ends of which slide in grooves (21a and 21b) of the leaf, toward the outside of the opening. This disengages the rear edge of the leaf relative to the rear edge (4) of the opening. Then, a thrustor displaces a carriage (39) along a slideway (38), while, by way of a roller (47) following a track (51), an arm (41) articulated to the carriage (39) and to the leaf (8) disengages the front edge (12) in a controlled manner relative to the plane of the opening. The arm (41) drives the leaf (8 ) toward the rear, while the leaf (8) pivots slightly and slides relative to the axis (19a) defined by the ends of the two rear arms (18a and 18b).

Abstract: A vehicle power window actuator for pivoting a side glass view panel about an axis. The actuator is fixedly mounted on a vehicle body panel and is comprised of a housing containing screw spindle rotatable by a reversible electric motor, a follower axially displaceable on said screw spindle by rotation of said screw spindle, and link pivotably connected at one end to said follower and at the other end to a window glass pane connector assembly, said link telescopically slidable within said housing. Axial movement of the follower on the screw spindle in one direction causes extension of the link out of the housing thereby exerting a pushing force on the connector assembly thus pivoting the glass view panel outwardly to an open position. Axial movement of the follower on the screw in the other direction causes retraction of the link into the housing thereby exerting a pulling force on the connector assembly thus pulling the glass view panel inwardly to a closed position.

Abstract: A window regulator having a first guide, defining the route of a sliding window, is engaged in sliding manner by a first slide connected to the window and moved along the first guide by an actuating device having an actuating arm turning about a first axis lying substantially crosswise in relation to the first guide. A portion of the actuating arm defines a second guide extending along a second axis lying substantially crosswise in relation to the first axis and the first guide; and a second slide, supported on the first slide, is connected in sliding manner to the second guide.

Abstract: This invention is directed to an ultrasonic machine and its method of operation. The machine has a main shaft rotatably supported in a housing, a machining head attached to one end of the main shaft, a piezoelectric transducer provided on the machining head, and a tool attached to an end of the machining head. The machine also includes slip rings provided on the periphery of either the machining head or the main shaft as an input terminal, brushes being in slidable touch with the slip rings and connected to a power source, and a brush detach apparatus for detaching the brushes from the slip rings to reduce friction and disconnect ultrasonic operation. The tool is rotated and pressed onto the work, hence starting a boring operation. After the rotation forms a pre-determined depth of a bore, the tool is ultrasonically vibrated to bore further into the work. The method and apparatus are particularly suited to boring small holes in ceramics and the like.

Abstract: An apparatus capable of simultaneously polishing a plurality of hard disk substrates at the same time includes at least three substrate carriers which are rotatably disposed on an index table and which carry and transfer a plurality of hard disk substrates, are moved successively through a substrate loading station, a substrate polishing station and a substrate removing station in response to intermittent rotation of the index table.

Abstract: A belt grinding assembly for grinding a smoothly radiused edge surface on an elongate bar such as a wrench. A bar manipulating mechanism moves the edge surface of the bar at a uniform rate of speed along an arcuate path about an axis at a right angle to a first direction in which an abrasive belt is driven into forceful engagement with the abrasive belt as it is driven along a support surface.

Abstract: A strobe light, oriented directly over a railroad track rail and at a 45.degree. angle to the horizontal, projects a light line across the rail. A pair of cameras oriented directly over the rail view the light image on the rail. The light lines reflected from the foot of the rail provide a reference for numerically describing the profile of the railhead. The measured rail profile is compared to an ideal rail profile. The results of the comparison are used to position grinding modules for grinding the rail to a preferred profile.

Abstract: An apparatus for controlling the machining of optical elements is disclosed. The apparatus comprises the thus measured value of radius curvature with the measured value of radius curvature of previously polished lens, means for determining curvature correcting value by comparing the thus obtained curvature variation value with a previously set allowed value of radius curvature, means for determining correcting value of machining conditions during the swinging motion based on the thus determined curvature correcting value, and means for adjusting the machining conditions in accordance with the correcting value of machining conditions.

Abstract: A portable wood sander comprising retractable interim fences to support the tool, while sanding, on the surface of an independent supporting structure, other than the surface of the work piece being sanded, and other straddling fences to stop the abrasive cut of the work piece by the sander when a predetermined angle and depth of cut of the top surface of the work piece has been obtained and the straddling fences contact the surface of the said independent supporting structure. The support, control and stop means or fences may be an integral part of the sander or be attachable to said tool or to a previously manufactured sander and may contain means for the fences to be adjustable vertically, horizontally or on an angle, independently or together, in order to obtain a predetermined angle and depth of cut of a work piece by mechanical means.

Abstract: A polishing tool is provided for polishing the end faces of optical fibers encapsulated within connectors which terminate the optical fibers. The tool includes a housing which has a forward surface and spaced passageways extending thereinto from the forward surface for receiving a pair of connectors with the end faces of optical fibers, encapsulated within the connectors, exposed at the forward surface to permit the end faces to be polished by moving the housing over a polishing surface. A support member is disposed within the housing and includes through holes for supporting the connectors received in the passageways. A spring is disposed between an upper portion of the housing and the support member for normally biasing the support member and the connectors supported thereby forwardly in the passageways. The passageways are located on opposite sides of a line passing through the spring whereby the singular spring is operatively associated with both connectors and their optical fibers.

Abstract: A method and apparatus is disclosed for cleaning and cooling a machine tool and workpiece in which a housing substantially surrounds the machine tool and closely conforms to the tool. A high pressure coolant spray is directed from the housing against the working surface of the rotating machine tool to clean the tool afterwhich the rotation of the machine tool within the close confinement of the housing sprays the coolant from the housing onto the workpiece where it serves to cool and lubricate the workpiece.

Abstract: Reduction of index undulation errors associated with helical gear teeth caused by the grinding process during the manufacture of the gears without degrading other gear accuracies (e.g. profile, tooth spacing) below levels required for precision (AGMA16 or DIN1) gears. A mold of the space between several gear teeth is obtained, with the mold having a length equal to or greater than the wavelength of the undulation error to be reduced. A microfinishing film is affixed to the mold and the mold is placed relative to a gear tooth so that the microfinishing film rests against a tooth surface having the undulation error. The grit size of the microfinishing film is such as to remove approximately 2 to 3 millionths of gear material with each pass through the teeth by the mold. Multiple passes are made by hand until the undulation error is reduced to an acceptable value. During the process the microfinishing film is replaced after approximately 3 or 4 passes and the process is repeated for each tooth of the gear.

Abstract: Lens for eye glasses are formed by a method in which a lens is selected having a finished front face and a rear face to be finished to provide a required curvature. The rear face is firstly cut on a Generator machine and is then polished on a cylinder machine. In the invention the conventional metal tool of the cylinder machine is replaced by a tool formed from a plastics material. The tool is mounted on a tool holder by a cooperating shape of the tool holder and a contact surface of the tool including wedge-shaped members and side shoulders which locate the tool without the necessity for a clamping action. The tool is formed by selection of a tool having a curvature approximating to the required curvature following which the approximate tool is cut on the Generator machine to form the required curvature.

Abstract: A method for mechanically finishing parts having the step of agitating a plurality of parts to be finished in contact with a plurality of discrete substantially homogeneous compressed felt chunks having a particulate abrasive material coating thereon.

Abstract: A tool guide temporarily attachable to vehicle body panels or other surfaces to provide a straight edge, and contour sander for use in connection with a straight edge. The tool guide includes an elongated member having a longitudinal edge surface for guiding a work tool, and suction cups mounted on tongues extending laterally from the body of the tool guide. The tongues are angled in relation to the body, so that the tongues exert a cantilever force urging the tool guide against a surface when the tongues are secured against the suction cups. The contour sander includes a number of flat blades mounted side-by-side and each having a longitudinal edge for contacting a contoured work surface. A clamp holds the blades in parallel juxtaposition and selectively loosens the blades for conforming contact with the contour. Finger grips are formed at the ends of the blades, allowing the operator to raise or lower any particular blade and obtain a sharper or more accurate reproduction of contour if desired.

Abstract: A block including several different pads (1) attached to a flexible connecting sheet (2) that permits superimposing the pads in at least to two different configurations so that the surfaces of different pads define the outer surface of the block.

Abstract: The waste collection device comprises a structure having a base and a cover which are suitable for delimiting a portion of space for the accommodation of a container. The structure is connected to lifting means suitable for providing movement between a position in which the structure is concealed within a pit and a position in which it protrudes completely from the pit. A hollow column is rigidly associated with the cover and is connected to the container for the insertion of waste.

Abstract: A high density storage facility comprising: a building enclosing a rectangular floor area of certain length and width; a plurality of rectangular storage racks of certain height divided from top to bottom into storage slots, the slots extending the rectangular length of the racks and being open and accessible for inserting and removing objects into and from the width ends of the racks; the racks being disposed within the enclosed rectangular floor area and including a mechanism for rolling the racks along the floor area; the building including a wall disposed substantially parallel to a lengthwise side of the rectangular floor area, the wall including doors selectively disposed along the length of the wall for providing access to all of the width ends of all of the racks; the racks being rollably movable along the length of the enclosed rectangular floor area for providing access to the width ends of the racks from the doors.

Abstract: A building structure for plant nursery or like buildings including a pair of side frame assemblies, each defined by an elongated gutter member supported at an elevated attitude by a plurality of upstanding supports. Brackets are disposed between the supports and the gutter member, the brackets including opposite side flanges disposed adjacent opposite sides of the gutter member to stiffen same. Straps span the gutter and connect the sides thereof together to resist splaying and thus deflection of the gutter under wind loading. The building structure includes a roof frame formed of a plurality of arcuate roof frame members which are supported in opposite sockets secured to the side flanges of the brackets.

Abstract: A segmented underlay is disclosed for use in installing a title floor of a shower. The underlay comprises a set of identical planar, rigid members which when laid side-by-side in a circuitous fashion form an underlay having a continuous surface which slopes substantially uniformly from the perimeter of the underlay to the center of the underlay.

Abstract: A dome shaped structure, and the method of constructing it, are described using curved gore-shaped construction panels which have grooves in their side edges. Rectangular tubular joining members are placed in the grooves, secured therein, and serve to join adjacent panels together. This provides a level surface where the panels are joined so that such adjacent edges of joined panels are even making the interior surface suitable for use as a projection surface.

Abstract: A floor construction includes a metal floor decking having a plurality of parallel multi-cell cellular metal floor raceways each of which includes at least one cell for high voltage power wiring. This one cell has a first wiring opening defined in a top thereof. A limited access feeder raceway transversely spans and rests upon the cellular metal floor raceways. The feeder raceway includes an enclosed first wiring raceway separating bottomless second and third wiring raceways. The enclosed first wiring raceway has a plurality of spaced second wiring openings defined through a bottom thereof, one of said second wiring openings being located directly above and in registry with each of the first wiring openings. The feeder raceway includes a closed top having a plurality of spaced access openings defined therethrough, one of which access openings is located directly above each of the second wiring openings.