Abstract: A device for cleaning the surface of aerial conductors comprises a rotary brush having a circumferential groove, a fluid- powered motor for driving the brush rotationally, and a J-hook hanger guide one end of which is secured to the power drive housing and the other end of which is adapted to be hooked over the cable. The hanger guide is so shaped and aligned relative to the rotary brush that when the hanger guide is hooked over and supported on the conductor, the conductor is engaged by the brush bristles within the circumferential groove of the rotary brush. The assembly device is mounted at one end of a hot stick which is manipulated by a single lineman to slide the power-driven brush along the conductor in a first direction to clean one-half of the peripheral surface of the conductor. Then the device is turned through 180.degree. and slid along the conductor in the opposite direction to clean the other half of the peripheral surface.

Abstract: The decontamination apparatus comprises a rotatable hone capable of being inserted into a heat exchange tube of a steam generator for removing contamination from the inside of the heat exchange tubes. The apparatus also comprises means for advancing and retracting the hone and means for removing contamination from the apparatus as the apparatus is withdrawn from the steam generator.

Abstract: A method of determining the oxygen partial pressure in an atmosphere at a known temperature, in which the magnitude of a critical potential equal and opposite to the free energy of formation of an oxide of a metal such as palladium in contact with the atmosphere is determined to provide a measure of the partial pressure of oxygen. Apparatus for use in the method comprises an electrolytic cell including an electrode of the said metal, an electrolyte such as yttria stabilized zirconia having ionic oxygen mobility and means to apply a potential to the cell to modify the resistance characteristics of the electrode.

Abstract: An improved device for fastening a separable zipper includes specially adapted terminals disposed at the respective ends of opposed rows of zipper teeth and a specially adapted slider supported by one of terminals. The slider is provided with an annular disc which can be inserted in a cooperating aperture of the other terminal by movement in a direction substantially perpendicular to the zipper rows. A second embodiment of the invention includes specially adapted terminals and two sliders, the sliders being disposed in back-to-back relationship and supported on one of the terminals, the sliders including an annular disc separable into semicircular halves for guiding the sliders into nesting engagement with the other terminal by movement in the direction substantially perpendicular to the zipper rows.

Abstract: A tensioning lever is mounted on one part of the shoe. A tension loop is mounted on another part of the shoe and adapted to be hooked into the tensioning lever. The tensioning lever can be moved along a rack to tension the fastener and is restrained by releasable means against being pulled back.Before a retensioning of the fastener, the latter should not be relieved from tension entirely. For this purpose, the tensioning lever cooperates with a ratchet mechanism for tensioning the fastener. The ratchet mechanism comprises a driver which cooperates with the rack and which consists of or is adapted to move with the tensioning lever.

Abstract: There is provided a safety sleeve and retainer of thin tubing which is of a size to provide a snug fit with the outer diameter of a pivot pin post as used with a watch band or strap. The sleeve is formed with at least a portion made with a tubular configuration and with about one-half made with a split. This split portion is expanded outwardly to form extending leaf portions. The safety sleeve is of rigid plastic or metal with a thin wall. The safety sleeve is adapted to retain the pivot pin post while the expanded leaf portions are a snugly slidable interference fit within a loop end of a strap or band. The safety sleeve is shown in two modes of construction. A preferred sleeve is made to enclose a previously provided spring pivot pin post. In the other embodiment the safety sleeve is secured to the outer portion of the pivot pin post and is used as an assembly.

Abstract: A beaming machine (beamer) suitable to run any common width beam for Raschel-type knitting machines, having three beams or heads with individual traverse settings so that different yarn end counts can be simultaneously wound on each beam. Uniform yarn tension is obtained at each beam by a series of two rollers positioned between the beam and the yarn creel over which each yarn end must pass. An evenly wound beam is thereby obtained for each of the three beams. Doffing time is minimized by the tensioning rollers in conjunction with pigtail-shaped yarn end guides mounted on one of a plurality of reeds adapted for the various end counts capable of being wound by the machine. Yarn breakage is detected by the breaking of a light beam in conjunction with an air sheet generated from an air slit for each beam. An air sheet is directed toward each yarn sheet so as to blow any broken yarn end across the light beam and thereby electronically initiate a shut-down of the beamer.

Abstract: Each of two tools is used in a sequence of operations to machine respective cylindrical portions of a multiple-crank crankshaft and the crankweb side faces adjoining said cylindrical portion. To permit an optimum utilization of the two tools and to ensure a substantial shortening of the time required for the machining of a crankshaft, the infeeding direction and the orbital feed rate of each tool are controlled independently of the other tool and only in dependence on the requirements for the respective operation. The crankshaft is held in a fixed position until its machining has been completed. In a milling machine for carrying out the process, each tool consists of an internal milling cutter and means are provided for moving said cutters independently of each other along three coordinate axes.

Abstract: In apparatus for and a method of sealing mounts to fluorescent lamp tubes on horizontal sealing machines each sealing head has a mount holding member pivotable between a mount sealing position in which it is coaxial with the lamp tube and a mount loading position which is angularly displaced by about 90.degree. in a plane normal to the direction of travel of the sealing heads from the mount sealing position and in which it can accept mounts from a mount conveyor externally of the sealing machine.

Abstract: The flash is removed from a freshly molded recorded disc by first bringing a knife against the edge of the disc and rotating the disc about its center to remove the major portion of the flash. A rotary cutter is then brought into contact with the edge of the rotating disc to remove the remaining portion of the flash. The rotary cutter provides the disc with a smooth edge and allows an accurate control of the diameter of the disc. The cutter is mounted on a pivotal bracket which is selectively moved toward and away from the disc by means of an air cylinder and piston which is connected to the bracket.

Abstract: An integral stainless steel golf club head having a lead insert positioned directly behind the center of the intended striking surface of the club head is provided by using a "lost wax" procedure to mold an internally screwthreaded recess in the rear surface of the club head, into which a correspondingly threaded lead insert of selected weight and length is inserted.

Abstract: The conduit structure comprises an outer tubular housing having a tubular inner member disposed therein with a first end of the inner member being positioned in the medial portion of the outer housing and retained therein by means of an outwardly extending flared portion on the first end of the tubular inner member which is constrained between two longitudinally spaced inwardly extending annular projections formed on the inner surface of the outer housing. A resilient annular seal is provided between the outer surface of the tubular inner member and the inner surface of the medial portion of the outer housing. The tubular inner member extends from one end of the outer housing and a second resilient annular seal is provided between the tubular member and said end of the outer housing. The tubular inner member is adapted for longitudinal, radial and rotational movement relative to the outer housing.

Abstract: A connector for subsea flowlines is disclosed having a metal-to-metal seal affording minimum flexure of the flowline. Each end of the flowline to be connected is provided with a mandrel. One mandrel, designated the flowline mandrel, is provided with a seating surface and an external locking surface. The second mandrel, designated the connector mandrel, is provided with a seating surface adapted for mating relationship with the seating surface of the flowline mandrel with a metal seal disposed therebetween. Additionally, the connector mandrel carries a first sleeve disposed concentrically about it adapted to slide over the end of the connector mandrel into circumferential engagement with the flowline mandrel. A plurality of locking dogs are carried by the first sleeve adapted for engagement with the external locking surface of the flowline mandrel.

Abstract: A contact programmable, small cell area MOS read only memory or ROM is formed by a process compatible with standard N-channel silicon gate manufacturing methods. Address lines are metal, gates are second level polysilicon, and output and ground lines are defined by elongated N+ regions. Each potential MOS transistor in the array is programmed to be a logic "1" or "0", by presence or absence of a contact engaging the polysilicon gate over the thin gate oxide.

Abstract: A process allowing the position and the dimensions of the grid of a field-effect transistor as well as the gaps between source and grid, grid and drain to be fixed as early as the first masking operation. To this end, a mask is formed comprising source, grid and drain windows by using a first insulating or semi-insulating material then the three windows are filled by means of a second material. The ohmic source and drain contacts are deposited in the corresponding windows reopened by selective etching of the second material effected after masking the first part of the layer situated above the non-reopened window. Second selective etching after masking of the contacts allows a Schottky-type grid contact to be deposited.

Abstract: An electrically programmable memory array of the floating gate type with a high coupling ratio is made by a process which allows the edges of the floating gates to be self-aligned with the edges of the control gates. The source and drain regions are formed prior to applying the first level polysilicon by a process which leaves these regions covered with thick oxide, rather than using the polysilicon as a mask to define the gate areas. The ratio of the capacitance between the floating gate and control gate to the total capacitance at the floating gate is increased by extending the floating gate out over the source and drain since the thick oxide reduces coupling from the floating gate to the source and drain.

Abstract: A method for providing high density dynamic memory cells which provides self-alignment of both V-MOSFET device elements and their interconnections through the use of a device-defining masking layer having a plurality of parallel thick and thin regions. Holes are etched in portions of the thin regions with the use of an etch mask defining a plurality of parallel regions aligned perpendicular to the regions in the masking layer. V-MOSFET devices having self-aligned gate electrodes are formed in the holes and device interconnecting lines are formed under the remaining portions of the thin regions. A combination of anisotropic etching and directionally dependent etching, such as reaction ion etching, may be used to extend the depth of V-grooves. A method of eliminating the overhang of a masking layer after anisotropic etching includes the oxidation of the V-groove followed by etching to remove both the grown oxide and the overhang is also disclosed.

Abstract: A method of manufacturing a rotatable assembly adapted for use in a prime mover. The rotatable assembly includes a shaft having a peripheral surface along at least a part thereof and at least another component having an opening therethrough. In this method, a plurality of generally annular axially spaced apart ridges is deformed from the shaft, and the ridges are in part extended beyond the peripheral surface of the shaft. The opening of the other component is arranged generally circumferentially about at least some of the ridges in displacement preventing engagement therewith.A method of manufacturing a prime mover is also disclosed.

Abstract: A hand held tool for cutting hard materials such as wire, having a pair of jaws which close around the material to be cut and including a resilient "U" shaped material affixed to the jaws and adapted to roll back while gripping and holding with variable force, one portion of the material cut.

Abstract: Shears suitable for cutting sheet metal and other materials and having a pivoting handle and multiple blades to facilitate the making of a variety of useful cuts. The shears includes two handles and two pivotally connected blades. One handle provides a rigid continuation of a generally V-shaped blade; the other handle is free to swing between extreme positions through an arc of about 180 degrees. The swinging handle pivots on a pivot pin carried by one of the blades. The other blade has a pair of cutting edges to provide scissor action with the cutting edges of the V-shaped blade. A pivot pin extends generally transversely to and is located between the cutting edges at one side of the other blade, and the pivoting handle is free to swing thereon. Scissor action results as the pivot pin transfers the applied moment caused by squeezing the swinging handle relative to the other handle to the other blade to thereby rotate the blades relative to one another.

Abstract: The gauge is a flat metal block with a precisely finished planar bottom face by which it can be supported on the upper planar face of a conventional granite gauge block for lateral sliding therealong while retaining a fixed angular relation to the planar face of the block. The base has an open end V-slot with planar faces which extend at 90.degree. to the plane of the bottom face, from the bottom to the top of the base, and which diverge outwardly at 90.degree. to each other to, and open through, a side of the base, to provide positioning jaws. The base, while resting on the granite block, can be slid to cause these faces of the positioning jaws to engage the circumferential wall of an article of circular cross section while one end of the article rests on the face of the granite block.

Abstract: An apparatus for measuring the piling profile of a blast furnace charge is disclosed. The apparatus includes a guide pipe having a distal end extending into the furnace. Means are provided for moving the guide pipe radially into and out of the furnace and for detecting the radial position of the guide pipe. A rope extends through the guide pipe to the distal end thereof and forms a loop at the distal end which extends around a pair of pulleys and which includes a plumb movably mounted on the loop. Means are provided for winding and unwinding the rope and for detecting the tension of the rope so that the contact of the plump with the charge can be detected. Means are provided for determining the position of the rope at such contact and for measuring the piling profile of the furnace charged based upon the guide pipe position and rope position at said contact.

Abstract: A gage for directly measuring the deviation in cross sectional area of a passage from a nominal value employs a hydraulic system having pistons operatively engaged therewith. The pistons move in response to movement of passage contacting finger elements and the hydraulic system responds to piston movement to generate a measure of the passage area. At least one set of the finger elements has rotatable passage contacting members, each member having an elongated passage contacting surface. Each member rotates about a respective axis positioned to keep the center of each contact surface in a fixed position relative to the finger. Stop means are provided by fixed outboard finger elements, juxtaposed opposite movable finger elements, for providing improved stability for positioning the comparison gage.

Abstract: A device is provided for locating the center position of an object directly, without the need of measurement or mental computation. The device comprises a generally flat elongated frame having a center point marker and distance scales. Two pins are journaled in the frame, and a cord is disposed around the pins to form a taut, endless pulley. Alternately, the pins can be eliminated and the frame slotted to receive the cord. Two end point markers are attached to the cord, one on each run of the pulley circuit. The end point markers abut at the center point marker on the frame. In use, the end point markers are adjusted to match the ends of the object in question. Since the displacement of each end point marker from the center point is equal, the center point marker indicates the center point of the object. Additional features provided are a lock screw to hold the index markers in one position, and a fine tuning adjustment to make fine corrections to the end point marker positions.

Abstract: The position, velocity or acceleration of a weapon in traverse and/or elevation is maintained constant at its value just prior to firing of the weapon, for a short period including the firing, thereby minimizing operator errors in aiming caused by smoke and vibration.

Abstract: Method and apparatus for drying moisture-containing material by use of a vacuum tank as disclosed. The tank is partially filled with cold liquid, such as water, and the material to be dried is supported in the tank above the liquid surface. Surface condensing means are located inside the tank adjacent the tank bottom in the cold liquid which condensing means has a combined vapor inlet-liquid overflow conduit through which vapor which evaporates from the material to be dried enters and through which liquid in the tank may overflow. Condensate and liquid overflow are removed from the condensing means as by pumping means. Air is evacuated from the tank as by first filling the tank with liquid while venting air therefrom, then pumping liquid from the tank through said condensing means. Moisture which rapidly evaporates from the material to be dried is condensed at the surface of the cold liquid and in said condensing means, for removal thereof by pumping through the outlet therefrom.

Abstract: An oven is disclosed as having a plurality of chambers which are sealed from the ambient atmosphere, and to which gas, heated to a high temperature outside the chambers, is circulated to each of the chambers for admixture with gas which is cool compared to the high temperature gas, to produce in the chambers a mixture of hot and cool gas at a predetermined temperature. The hot gas is circulated to the chambers at a certain desired pressure, wherein the cool gas is circulated to the chambers at a certain rate of flow. Gas is exhausted from the oven also at a fixed rate of flow. The gas pressure in the first oven to be encountered by an element passing through the oven, is monitored and triggers a change in the flow of cool gas when the pressure varies from a desired norm. This change in flow of cool gas influences the temperature which is also monitored. A change in the temperature produces a corresponding change in the mixture of hot and cool gas to return the oven temperature to the desired level.

Abstract: It has been known that volatile organic compounds evaporated in a substantially closed drying oven may be recovered by condensing part of the vapors in a cooler and recycling the mixture of the non-condensed vapor and inert gas back to the oven. However, non-steady state conditions tend to cause volume and pressure variations resulting in an out-breathing of oven atmosphere through the oven's entrance and exit ports, and an in-breathing of outside atmosphere. The invention provides a flexible expansion-contraction chamber to temporarily receive excess gas volume return it to the oven with minimal change in pressure. This reduces the loss of vapor, minimizes the need for inert gas addition, and conserves energy.

Abstract: A laundry drying system and method in which fresh air flows through a low temperature duct of a preheater, then through a primary heater before entering a laundry drying chamber is described. The air enters into contact with laundry in the chamber, then is exhausted, flowing through a high temperature duct of the preheater. In the preheater, heat pipes transfer heat from the exhaust air in the high temperature duct to the fresh air in the low temperature duct. Thus, heat which would otherwise be discarded in the exhaust air stream is recovered for use in the drying process. The preheater preferably uses heat pipes having a liquid return tube and set in a plate fin heat exchanger. To provide for a cool down cycle, there is a bypass which defeats the operation of the preheater. Lint exhausted by the drying chamber is partly collected by a dry type lint remover between the chamber exhaust and the preheater.

Abstract: An article of footwear which comprises a ringlet of elastic webbing forming the upper thereof with its lower longer edge embedded in elastomeric composition which takes a set at low temperature to form a unitary sole and heel inseparably bonded to the upper. If the sole is made to be worn over athletic shoes of the type equipped with spikes or cleats, the interior of the sole is molded to provide cavities accommodating such spikes or cleats. The rims of these cavities bear against and support the rim areas of the sole and heel of an athletic shoe thereby preventing the spikes from penetrating the sole of the footwear. The elastic webbing is tailored to shape merely by forming a dart crosswise of the midportion of the toe end thereof.

Abstract: Crane for a towing suction device of a dredging craft, which crane is provided with a carrying arm with which a movable tube part of the towing suction device can be displaced between an inboard non-operative or rest position and an outboard dredging position, with which at least one power driven winch is arranged for hoisting and/or paying out one or more cables connected with the movable tube part, the winch with its motor being housed inside a closed tube shaped part of the carrying arm, said winch motor being placed coaxially at the inside of the winch, whereas the winch cables also extend at least partly through the tube shaped carrying arm.

Abstract: A trencher for escavating narrow channels in soil comprises a power driven wheel rotating about a transverse, horizontal axis and a plurality of buckets disposed about its periphery. The wheel includes a pair of circular gear racks disposed inwardly from its periphery and symmetrically about the vertical midplane of the wheel. A pair of pinions, engaging the pair of racks, symmetrically applies driving energy to the wheel. Each of the buckets comprises an arcuate cutter face and undercut, arcuate, longitudinal body portion which is secured to the wheel by a flat spoke extending radially outwardly from the vertical midplane of the wheel. The trencher also includes two pairs of arms disposed on opposite sides of the wheel and bucket spokes. As the wheel and buckets rotate, soil is engaged, lifted above ground level and emptied from the buckets by the pairs of arms.

Abstract: An excavating tooth assembly including an adapter, a wear cap for the adapter and a point in which the point and adapter have primary cooperating stabilizing surfaces and in which the point and wear cap have secondary cooperating stabilizing surfaces.

Abstract: An article for displaying a plural leafed greeting card. The plural leaves may move around a common axis, or they may move around different axes. An article for displaying a two-leafed greeting card is made of two leaf supports connected together at a desired display angle, either stationary or variable, by a hinge. The first leaf support has a first part for receiving the first laf of the greeting card and is transparent on both faces to allow display of both sides of the first leaf of the greeting card. The second leaf support has a second part for receiving the last leaf of the greeting card and has at least one transparent side allowing display of at least one side of the second leaf of the greeting card. The display article may be inserted in a separate frame and support having added esthetic properties or having additional features such as added strength to protect against breakage during shipment, such as through the mail.

Abstract: Aluminum foil labels for bottles are disclosed which have on both sides a colorless or colored coating provided with an imprint on the outside, if desired, the aluminum foil label being adapted to cover the closure and part of the bottle--neck and to be affixed thereto with the aid of a glue which is soluble in an alkaline cleaning liquor. In accordance with the invention the coating comprises a varnish coating which is insoluble in the alkaline cleaning liquor. The coating can have mutually opposite weak areas which can consist of uncoated stripes. Also disclosed are bottles comprising a bottle body to which is attached such aluminum foil coated on both sides thereof with a varnish coating which is insoluble in an alkaline cleaning liquor. The insoluble varnish coating defines open areas which are opposed from open areas on the opposed insoluble varnish coating.

Abstract: A display device for a machine such as a poker machine or fruit machine in which information to be displayed is arranged on a closed loop of flexible strip material arranged to pass in front of a viewing window. The closed loop is moved around the predetermined path by electric motors for example. The closed loop can be stopped or started as required and when in motion its position is sensed by an electronic sensor, the output of which is fed to a microprocessor. In a poker or fruit machine a number of such loops of flexible strip material are arranged side by side in a casing which may have the appearance of a conventional fruit machine or poker machine.

Abstract: A sign post has a hollow post with a cross arm assembly inserted into the upper end of a post and a stake inserted into the lower end. Hooks and a slotted member are attached to the horizontal tube of the cross arm assembly. A first sign may be hung from the hooks while a second sign may be inserted into the slotted member. Stake includes expander elements for snugly fitting within post and a plate for preventing the sign post from turning in the wind.

Abstract: A hand firearm, such as an automatic pistol, has a butt or handle in which a magazine is mounted. The magazine is retained in position by a locking member which can be actuated from either side of the pistol by the hand of the user holding the firearm. The locking member is a spring-loaded lever which has a projection received in an opening in the wall of the magazine to lock the magazine in position. An actuating member extends on both sides of the firearm and is operatively connected with the locking lever so that actuation of the actuating element will pivot the lever to unlock the magazine.

Abstract: This invention discloses a kit for assembling light, airy, toy-like designs from blocks and solid sticks made of the same material throughout. The blocks preferably have tapered holes adapted to receive the sticks' ends therein. The holes and the sticks are adapted to compressively engage with one another upon insertion of selected ends of the sticks in the holes, thereby providing a secure grip by each hole's wall upon the end of the associated stick, locking it into the hole.

Abstract: A toy steam locomotive is described which includes a small electric motor which drives an apparatus for producing a sound simulating a steam locomotive, an apparatus for producing a sound simulating a steam locomotive whistle, and an apparatus for producing a visual simulation of a fire in a steam locomotive firebox. The apparatus for producing a simulated steam locomotive sound includes a resonator and a vibrating spring. A cycling member is attached to the spring and concurrently tenses and relaxes, lengthens and shortens and associates and disassociates said spring with a sound activating member. The apparatus for producing the sound simulating a steam locomotive whistle includes a housing having a fan located therein and an air inlet and air outlet. The air outlet is associated with a whistle and a sealing member seals the air inlet, but allows air to be drawn into the housing when the sealing member moves away from the air inlet.

Abstract: A generally rectangular sheet of self-supporting material such as paperboard is scored and cut in such a manner as to be foldable into a fast food carry-out tray which can be converted after use by manipulation of preformed tear and fold lines into a hand puppet. The fast food carry-out tray has at least one opening extending into a tray cavity for receiving a paper cup or food item. In a preferred embodiment, the tray is also provided with a box-like cover. The sheet material is printed with designs or indicia which suggest a hand puppet character. Cut-out tabs may also be provided for insertion into the sheet material to further create an impression of eyes, a nose, or the like of a hand puppet character.

Abstract: An equalized or compensated suspension system is reproduced in a model of a locomotive and comprises an arrangement of levers and/or dummy leaf springs which are interconnected by links so as to imitate the suspension system of the original locomotive. The model locomotive has a chassis and generally vertically reciprocable wheel axles mounted along the chassis. Springs are disposed in housings fixed to the model's chassis and are arranged to act at opposite ends on the wheel axles and associated levers or dummy leaf springs of the suspension system.

Abstract: New hybrid seed varieties and plants therefrom are rapidly developed and commercially produced. New hybrid seeds can be readied for market in as little as three years, compared to the conventional eight to twelve years required for preexisting techniques of hybrid seed production. Plant breeders are no longer limited to homozygous parents in the production of new hybrids.

Abstract: A home gardener's process and device for fungus and insect control for fruit trees. The process employs the application of a variety of insecticides in a manner that avoids repetitious application of chemicals and forestalls the development of a resistant strain of insects. A variety of water soluble insecticides are prepackaged in measured amounts sufficient to mix with a gallon of water for the spray application of the mixtures to the fruit tree. The packets are numbered with indicia on the outer portion thereof indicating the sequence and the preferred timing of the application. The packets are numbered and arranged in their preferred order of application. The method for protection of pome fruit trees from fungus and insects includes twelve applications of four different chemicals over a prescribed sequence in a prescribed period of time.

Abstract: A thermal shutter device with vertical travel for use in combination with a window unit comprising a window frame & glass panels mounted in the window frame which is installed in a building outer periphery walls such as a dwelling, this device which is a thermal insulation construction comprising at least two thermal shutters with vertical travel & means to seal said thermal shutter device to create a sealed chamber between shutter device & window construction, the shutters can be of laminate construction with rigid insulation mounted in vertical track allowing shutters to slide up & down on compressible insulation slide means, when in closed mode they will greatly reduce heat transfer or infiltration either direction through said window construction, therefore reducing energy used to heat or cool said building, therefore helping our countries energy conservation program.

Abstract: Adjustable hub mount for circular saw blade which enables the substantial elimination of blade wobble due to non-uniform flatness of the saw blade.

Abstract: Shot moves from the shot propelling device against articles to be cleaned and then falls through the floors of the blast housing and vestibules and accumulates on a canopy over a central auger conveyor. The shot moves about the canopy to the central auger conveyor, and then is conveyed upwardly to the shot separator where it falls in a cascade downwardly to the shot hoppers which feed the shot propellers. Air is directed through the entrance and exit vestibules and then through the cascading shot to a filter, thereby removing the debris from the shot. A roller conveyor assembly has entrance and exit portions which can be detached from a central portion and extended through the blast housing and vestibules for storage.

Abstract: A waisted envelope for tubular building structures, such as cooling towers, is supported by way of a supporting structure, joined with its top end and responsible for a pulling or pretensioning force, on a system taking up the vertical component of the pulling force. The envelope is designed as a membrane made of material designed for supporting tension within its plane in all directions.

Abstract: An in-ground swimming pool is thermally insulated from its surrounding excavation floor and walls by a layer or bed of granular fill material comprising preferably volcanic cinders providing thermally insulating pockets of entrapped air between excavation and pool walls. According to one method of construction, a bed of granular fill material is laid along the bottom of the oversized excavation. A wire mesh screen is erected along the sides of the excavation but spaced inwardly therefrom at the outer perimeter of the pool sidewalls to be formed to provide a space between the excavation sidewalls and the outer perimeter of the pool sidewalls, and such space is filled with the granular fill material. Finally, the pool walls are formed by spraying a gunnite or other cementious material against the wire mesh screen to build up the desired pool wall thickness.

Abstract: A joint system for structural panels in which the panels have an edge construction providing a U-shaped profile having a side leg spanning between the opposite surfaces of the panel, a base coplanar with one of the surfaces and a clamp leg having an inwardly projecting portion. The panels are interconnected by cover strips of U-shaped cross section having a body adapted to overlie the clamp legs of the adjoining panels. At the opposite side edges of the body, arms extend inwardly and mount locking strips which extend toward the center of the body and are adapted to engage with the inwardly projecting portions of the profile to permit the panels to be connected in endwise alignment, at right angles, or in back-to-back relation. The patent specification discloses several different configurations of the U-shaped construction and several different configurations for the cover strips.