Abstract: A process for the rapid annealing of refractory fiber is disclosed. Air at a temperature of 750.degree. F. (400.degree. C.) to 1400.degree. F. (760.degree. C.) is passed through a refractory fiber body for a period of 5 to 200 seconds while the body is held securely in place for dimensional integrity. Apparatus for performing the process of this invention comprises an annealing unit containing opposed foraminous platens and means for passing hot air through the platens and through the fiber body retained between the platens or opposed foraminous belts and adjacent conduits and means for passing the hot annealing air through the conduits and belts and through the fiber body retained between the belts. The process and apparatus may be used to produce fiber bodies of a single material or laminated bodies of a plurality of interlocked layers, which may be of different fiber materials.

Abstract: The invention relates to a heel and sole assembly for an adjustable arch shoe. The assembly comprises a fixed nondeformable support element forming a heel portion and a sole portion, a pivoting element which covers a rear portion of the sole and heel portions and which is articulated upon the sole through an axis which is perpendicular to the length of the shoe so as to pivot between a lowered position and one or more elevated positions, a locking element to lock the pivoting element in any one of its positions and a prestressed spring arranged between the fixed support element and the pivoting element to force the latter upwardly to a desired elevated position. Such an assembly makes it possible to instantly change the heel height of the shoe without removal of the shoe from the wearer's foot.

Abstract: An inflatable display is adapted to be towed over the surface of a body of water and includes an inflatable body which in the disclosed embodiment has an elongated ballast along the bottom to provide a keel-like structure and a blower to continuously force air into the body to keep it inflated against the slight deflation that continuously occurs at seam lines, etc. A tether is extended from the body to a tow vehicle so that the float can be towed along lake surfaces, bays and beach fronts for promotional purposes.

Abstract: A finger ring is provided with an endless strip of film held in a track formed within the ring. The ring includes a lens for viewing the film, a light transmitting system to apply light to the film and a film advance mechanism for moving the film a predetermined distance each time the advance mechanism is actuated.

Abstract: A self-containing accessory providing illuminated decoration of a cake or like, comprising, in certain preferred versions, an externally applied decorative cover of eye-defining light-transmissive portions and including a module, secured to the underside of said cover, to provide flashing illumination by means of an electric light source, battery, and interconnecting circuitry contained therein; the module being positioned such as to locate the electric light source beneath or within said light-transmissive portions so as to give the visual appearance of winking eyes; a recess being within the cake to receive the module. Another embodiment carries circuitry beneath the cake with illumination being provided atop a probe-like extension inserted upward from beneath said cake. Another embodiment achieves illuminiation by use of phosphorescent devices. Yet another embodiment achieves illumination by filtering light through various light-transmissive materials.

Abstract: A device for retaining cartridges in a tubular magazine of a semi-automatic shotgun when the cartridge in the firing chamber is being replaced, comprising a spring-loaded catch lever which is pivoted to the gun about a transverse axis, so as to be angularly displaceable between an inoperative position allowing the discharge of cartridges from the magazine, and an operative position blocking the discharge of cartridges from the magazine. The lever is displaced manually into its operative position and is held in this position by the action of the magazine spring until the gun is fired, whereupon the recoil causes the automatic release of the lever to its inoperative position.

Abstract: A bolt assembly includes a locking lug bored to slidably receive both a bolt hold down plunger and a cartridge extractor pin jointly actuated by an interposed coil spring. An extractor is rockably mounted adjacent the bolt forward end and urged by the extractor pin into gripping engagement with a cartridge rim for extracting same from the gun barrel chamber. The extractor includes a stem loosely received in a bolt defined recess.

Abstract: A new and improved handgun providing a strut assembly which engages the hammer assembly at two contact points, one of which is at the hammer pivot point which acts as a stop. An improved sequential firing mechanism is disclosed making use of notches on a ratchet engaged by a detent to secure proper alignment and positioning of the hammer firing mechanism with the firing pin. The invention also provides a safety mechanism for preventing the accidental firing of additional shots in a multibarrel handgun.

Abstract: Fish can lightly nibble bait off a hook before a fisherman becomes aware and is able to react by firmly setting the hook in the fish. Apparatus is provided for reacting to a fish lightly nibbling at the bait in a manner sufficient to swiftly jerk the hook thus firmly setting it in the fish's mouth. The apparatus can be used for ice fishing or can be hand held in the conventional manner for water fishing. The hook can be set for fishing at various depths.

Abstract: A fishing lure with a main body as a tapered fluted screw and a metal journal insert for weight and vibration through the longitudinal axis. A shaft runs through the insert to provide line and hook attachment at the ends. A shiny metal overlay is loosely mounted on the shaft on each end of the main body, with the loose fit over one vane surface providing higher vibration and slower rotation due to the fit and off-balance of the lure.

Abstract: An improved rotating frame animal trap includes jaw-forming sides which, in the closed position of the trap, are projected toward one another from parallel sections of their supporting end members. This configuration provides the correct jaw spacing in the closed position of the trap to maximize the jaw pressure for a given spring force.

Abstract: A baited marine animal trap for lowering into the water where the doors open to entice marine animals and the marine animals are trapped by elevating the trap and closing the doors. The present trap has the openings on the sides reduced to decrease the probability of the escape of the trapped marine animals.

Abstract: A toy vehicle having a driven member including an axle rotatably mounted on a vehicle body to which axle are fixed two wheels and an intermediate star gear; and a drive member having a drive shaft transverse of the axle which may be rotated via a crank at one end to wind a rubber band attached between the other end of the drive shaft and the body so that energy stored in the rubber band will drive the star gear on the axle via a star gear on the drive shaft.

Abstract: A protective device for a building adapted to be installed at a window to prevent ingress, the device comprising a first member adapted to be attached to one edge of the window; a second member adapted to be mounted to a further edge of the window, opposed to the first channel member; each member including recesses formed in it at predetermined centers; and a bar extending between a pair of opposed recesses to prevent ingress, the bars being located by the attachment of the members to the window surround.

Abstract: The present invention is for an automatic gate opening device where commercial electricity is not economically available. A hydraulic cylinder operated by a bidirectional gear pump moves a cylinder rod which connects to an opening rod. The opening rod is pivotally connected to one end to the gate and on the other end to a stationary location. Due to pivotal connections and a pivotal linkage near the middle of the opening rod, the gate may be opened and closed by the hydraulic cylinder. The hydraulic cylinder is also pivotally mounted. Electronic controls may be operated by a number of different type sensors, including limit switches on the hydraulic cylinder, sensors for detecting the gate location, manual switches or other traditional vehicle approach sensors. Power is provided by a storage battery, which battery can be recharged during daylight hours at a solar panel or by a traditional battery charger.

Abstract: An improved adjustable mounting arrangement for mounting a glass door assembly on a door frame for a refrigerated display cabinet. The mounting arrangement includes upper and lower hinge assemblies for providing swinging movement of the door assembly relative to the door frame, with the hinge assembly accommodating adjustment of the hinge axis relative to the door frame for alignment of the door assembly in order to provide effective sealing and enhanced appearance of the display case. The hinge assemblies include upper and lower hinge brackets which are adapted to receive upper and lower hinge pins of the door assembly, the brackets being adapted to be attached to frame members of the door frame in different positions for effecting alignment of the door.

Abstract: A door jamb reinforcer is disclosed which comprises at least one, and preferably two or more, reinforcing rods which are positioned internally along the depth of a door jamb adjacent the area of the bolt receiver or striker plate. The rods are used in conjunction with a brace bar which is positioned adjacent the striker plate, and extends above and below it on the edge of the door jamb. With the use of the bar and reinforcing rods of this invention, a door jamb's shear and tensile strength is increased to prevent the jamb from being splintered and broken during a potential forced entry.

Abstract: A motor-vehicle door has a generally annular door frame having an inner side and outer side respectively releasably connected to inner and outer door panels. A hinge is connected to one vertical edge of the frame between the sides and a latch to the opposite edge. A window pane is vertically displaceable in and above the frame and the mechanism for operating this window and for operating the latch are fixed to the inner panel. The frame is formed by a pair of frame parts together forming a tubular box-girder structure on the two upright sides and lower edge of the door for maximum rigidity.

Abstract: A door and window arrangement for hingedly mounting in the opening of a cab frame wherein a door frame is formed complementary to and fitting within the opening and having a first frame extending inward. A sub-assembly is formed having an outer frame with a second flange extending toward and in close proximity to the first flange. A gimp engaging both flanges joins the door frame and subassembly into a completed assembly. An inner frame defining a pair of tracks is fastened to the inside of the inner frame. A fixed pane of glass is sealed into the lower portion of one track and a movable pane of glass is mounted in a metal frame with a plastic slider affixed to vertical members of the metal frame positioned within the other track.

Abstract: A belt sanding machine for plane-sanding of a surface and comprising two sanding units and, as seen in the feed direction, in front of, between and behind these sanding units guides or pressure beams for setting the sanding depth, and a table (9,10) for pressing the workpiece against the sanding units and pressure beams. The table is designed in such a way as to allow both dimensioning or adjusting a workpiece to an almost exact plane-parallel shape and finish sanding with an accurately predetermined sanding depth regardless of whether the thickness of the workpiece varies locally.The sanding machine is characterized in that the table includes a number of pressure studs movable towards and away from the sanding units and the pressure beams the pressure studs being arranged to be actuated by a pressurized fluid.

Abstract: Device intended to be displaced along track rails and comprising a frame (2) guided by the rail (1) provided with a grinding wheel (6) which grinds through its periphery. To uniformly distribute the wear resulting from contact with the rail on all its active surface, the grinding wheel (6) is driven, in addition to the continuous rotation supplied by a driving motor (7), in an alternating motion transverse to the track by means of an actuating mechanism. This actuating mechanism comprises a motor-gear assembly (13) driving an eccentric shaft (9) on the eccentric of which the movable support (8) is hinged. To avoid the formation of sinusoidal traces due to the grinding, the amplitude a of the reciprocal movement is related by the equation a.congruent.l-f to the width l of the active surface of the grinding wheel and to the width f of the portion of the profile of the rail which is ground.

Abstract: The cleaning apparatus includes a wheel in the form of a rapidly rotating drum having relatively few blades spaced circumferentially about the periphery thereof and extending radially thereon. Abrasive material is delivered from a hopper through a slot and is picked up by the blades of the rapidly rotating drum and delivered with extremely high kinetic energy into the surface to be cleaned. The apparatus is constructed so that the recovery path of the abrasive material from the surface to be cleaned and the delivery path of the abrasive material directed to the surface to be cleaned are in the same plane and in the same plane as the plane of rotation of the drum. The recovery path is generally contiguous with the housing of the drum, creating a compact apparatus which utilizes the normal path of movement of the recovered abrasive material.

Abstract: A panel having means for interconnecting it to other like panels, said interconnecting means comprising hook and ring connector members which are longitudinally shiftable relative to the length of the panel and are substantially flat.

Abstract: In a window assembly including a panel mounted for pivotal movement relative to a casing in a roof sheathing, a moving rib attached to the panel and a guide rib operatively connected to the moving rib, actuating means for automatically pivoting the panel from a closed position overlying the casing to an open position disposed at a predetermined angle to the casing comprising a preloaded spring member, at least one actuating lever connected to said spring member, said actuating lever pivotally connected at its ends to the casing and guide rib and operable upon release of the panel from a closed position to effect pivotal movement of the panel to a predetermined angular position relative to the casing for a given linear displacement of said spring member and adjusting means for selectively varying the angular displacement of said panel by said actuating means.

Abstract: A new and improved support hanger for suspended ceilings is described along with a method of its use in installation of suspended ceilings between sets of parallel ceiling joists. The support hanger has a generally U-shaped configuration with the free ends thereof bent outwardly away from each other and downwardly towards the bottom of the U-shaped bend to form two hooked ends which open downwardly and lie in substantially the same plane with the U-shaped bend. The hanger is employed in erecting a suspended ceiling by tying a suspension wire to be supported in space between a set of parallel ceiling joists to the support hanger. The U-shaped bend portion of the support hanger is then inserted together with attached suspension wire in a keyway formed in the end of an elongated pole of sufficient length to reach between the parallel ceiling joists from the floor of the building space.

Abstract: An insulating window insert panel provides for vapor and draft barrier functions and also provides for the supporting of a decorative panel or material on the inside surface. The panel is particularly adapted for use with double-hung widows or the like to provide a substantially higher insulating value for the windows so that the heat loss and drafts therethrough may be substantially reduced, and includes a central core or block formed of polystyrene foam which forms a close fit with the window frame and which supports thereon a vapor impervious sheet forming a vapor barrier and a blanket of non-woven fluffy material overlying the vapor barrier sheet for fitting into cracks and crevices and otherwise providing a draft free seal for the window insert, which vapor barrier sheet and blanket are retained at their marginal edges in a circumferential groove and a retaining band carried on the polystyrene core. A decorative panel or sheet may be placed on the inside surface of the window insert unit.

Abstract: This application discloses a system of construction that uses as its main component, a flat panel member similar to a standard 2.times.8 timber with both edges beveled at a 45.degree. angle in opposite directions with an interlocking female recess in one of the 45.degree. sections and an interlocking male extrusion on the opposing 45.degree. section. These components may be assembled to provide: (1) a straight narrow wall by reversing adjacent panels and sliding male extrusions and female recesses together, (2) assembly of two adjacent panels to form an angle by sliding male extrusion and female recess together without reversing the sections, (3) forming a U channel by sliding three sections together in a similar manner, (4) sliding four sections together in a similar manner to form a square, hollow beam section.

Abstract: A building element of lightweight concrete is reinforced by at least one grid of heavy concrete arranged parallel to its lateral side faces, reinforcing rods connected to form a grid are disposed within said heavy concrete grid. Each of said heavy concrete grids, therefore, represents a covering of the reinforcing grid, thereby first obtaining rust protection for the reinforcing rods and, second, the bonding effect between the reinforcing rods and the lightweight concrete. A plastic and elastic expansion characteristic of lightweight concrete is thereby utilized to compensate the high amount of shrinkage of the lightweight concrete adhering to the heavy concrete grids so that the building elements remain free from fissures. The lightweight concrete is able to receive static stresses and is used for the reinforcement of the cells of the heavy concrete grid so that the cross-section of the rods of the heavy concrete grid may be reduced to a minimum.

Abstract: A compound girder of an on-site assembly type is assembled to include components which rigidly interconnect two or more prefabricated ceiling panels (3a, 3b) in a bending stiff manner. The compound girder includes for each ceiling panel (3a, 3b) at least one web section (1a, 1b) and an upper chord section (2a, 2b). The girder further includes a continuous length lower chord (4). The lower chord (4) takes up the tension and shearing loads. The individual web sections (1a, 1b) are secured to the lower chord (4) by screw connections which prevent a sliding displacement between the connected elements relative to each other.

Abstract: The present disclosure is directed to a modular floor unit and method of making same. The module is made up of a plurality of lengths of tongue and groove strip flooring having a flat smooth finish on one side and a plurality of channel recesses on the other side. The tongue and groove strips are all of the same length and have the tongue of one strip full into the groove of an adjacent strip. The unfinished side is glued to a plywood back the grain of which is at a right angle to the length of the strips. After gluing the plywood is stapled to the back of the strips.

Abstract: An insulating window structure has an inner glass pane spaced from an outer glass pane by a spacer frame extending around the panes so that the panes define between them, within the frame, a gas-filled space. According to the invention, at least one of the panes is anchored to the frame by a resilient connecting unit having a spring characteristic (restoring force plotted along the ordinate versus displacement plotted along the abscissa) which has a substantially horizontal portion at the center of this characteristic and at which the working point of the resilient unit is provided.

Abstract: A cylindrical resilient plastic bushing having a central bore fits coaxially within the wooden chord openings of a single or double chord truss joist. The bushing bores are sized to receive the metal pins of the joist which fasten the metal webs to the chord section. The insertion of the pin slightly expands the resilient bushing thereby providing for a full fit of the pin within the bushing and securely locking the bushing within the chord. The bushing distributes the shear and compression loads over the wooden chords and absorbs vibrations acting on the truss.

Abstract: Apparatus is disclosed for simultaneously transferring a plurality of stacks of sliced or bulk food product from a holding station, such as the output of a slicing and stacking machine, to a receiving station, or the like, for loading and packaging of the food product. The device includes a rapidly and continuously operating accumulating conveyor for transferring a plurality of stacks from the holding station to a transfer station, and a shuttle-like, product-engaging member mounted proximate the transfer station for rapid, reciprocating movement transverse to the conveyor for transferring the plurality of stacks from the transfer station to a loading station. The product-engaging member has a plurality of concave portions, each formed to receive one stack of the plurality of stacks of product.

Abstract: A clamping mechanism for an impulse sealer includes a pair of drive arms pivoted on a flat base member and a pressure arm pivoted about the same pivot between the drive arms. Complimentary pressure members are located at the free ends of the drive arms and pressure arm for clamping a member to be heat sealed. A pair of levers are pivoted intermediate their ends on the drive arms between the clamping member and the pivot. The levers are comprised of two arms disposed at oblique angles relative to each other with the end of the lower arm sliding on the flat surface of the base member. The free end of the upper arm of the lever is connected to the pressure arm at a point between the clamping member and the pivot by means of a connecting rod so that depression of the drive arm will cause the ends of the lower lever arm to slide along the surface of the base member.

Abstract: A horse training pressure plate comprising a flat backing plate with a pad of sponge-like material affixed to one side of the backing plate, is provided. A plurality of pins of slightly lesser length than the thickness of the pad, project from the backing plate within the pad and mounting brackets on the side of the backing plate opposite the pad for maintaining of a pressure plate on the head poles.

Abstract: A method of removing aquatic plants growing from the bed of a lake or other body of water includes the steps of moving a horizontally oriented bar through the plants beneath the surface of the water, permitting the plant stalks to wrap themselves around the bar. As the bar continues to move, the plant stalks are pulled and either broken at a point between the bar and the roots or are pulled out of the lake bottom by the roots. Once the plants have been broken off or pulled out of the bottom, the bar is moved to a desired position and the plant stalks severed to free them from the bar. An apparatus for carrying out the method provides a plant-engaging bar mounted on the free end of a boom pivotally mounted on a hull floating in the water. The boom can be lowered to place the bar beneath the surface of the water and the hull has a propulsion system to move it through the water, thereby moving the bar through the plant beds.

Abstract: A combined safety clutch and brake mechanism for a rotary lawn mower blade has a driven blade carrier with self-energizing centrifugal shoes biased to engagement with a driving drum. Brake drum segments fixed to the shoes are engaged by a brake band which physically forces the shoes to declutched position. To ensure reliable operation, the brake band is connected to a lever arm which is strongly biased to brake-ON position by a coil spring engaged about a guide rod and disposed along the movable end portion of the brake band, in a chordal position between the band and a surrounding protective bowl. The geometry of the lever arm and spring thrust line progressively reduces the force required to actuate the brake band to OFF position, relative to the spring force, as the lever arm is moved and the spring compressed.

Abstract: A lawn mower is illustrated as including a carburetor having a float bowl adapted to contain a vent assembly for selectively venting the air space of the carburetor float bowl to the atmosphere when the internal combustion engine of the lawn mower is running and for precluding evaporation of fuel from the air space when the engine is not running. The lawn mower fuel tank also includes a vent assembly for selectively venting the fuel tank to the atmosphere when the internal combustion engine is running and for precluding evaporation of fuel from the fuel tank into the atmosphere when the engine is not running. Each vent assembly includes a valve member resting on a valve seat and supported for movement in response to vibration of the engine and in such a manner that the valve member will return to its position on the valve seat when the engine is shut off.

Abstract: A mower hitch support (103) pivoted to the front of a tractor (11) has a connection (126, 128, 132) with an axle link (46) interconnecting front wheels (17, 18) mounted individually on the tractor frame (12) to cause an underslung mower to tilt laterally in response to the front wheels encountering undulations in the ground thereby substantially avoiding scalping of the lawn.

Abstract: A splicing apparatus for spun yarns includes a splicing member having a splicing hole and a jet nozzle jetting a compressed fluid. Yarn end control nozzles, yarn cutting devices, a yarn gathering lever and yarn clamping devices are arranged in sequence on both sides of the splicing member. The yarn gathering lever for taking out the yarn ends left in the untwisting nozzle is regulated with the quantity of turning by a stopping means.

Abstract: An air modulation apparatus, such as for use in modulating cooling air to the turbine section of a gas turbine engine. The apparatus includes valve means disposed around an annular conduit, such as a nozzle, in the engine cooling air circuit. The valve means, when in a closed position, blocks a portion of the conduit, and thus reduces the amount and increases the velocity of cooling air flowing through the nozzle. The apparatus also includes actuation means, which can operate in response to predetermined engine conditions, for enabling opening and closing of the valve means.

Abstract: A fuel injector for ducted rocket motors is provided that distributes compressible fluid fuel flowing from an upstream throttle device through discharge ports of a hollow tubular member without losing throttling capacity of the throttle device. The injector has an axial fuel flow passage with a cross-sectional area that decreases stepwise rearward of a radial discharge of the fluid fuel. The dimensions and position of the flow passages of the injector provide desired flow distribution while preserving the smoothness and regularity thereof.

Abstract: This disclosure relates to internal expansion engines of the type where a non-combusting operating fluid is vaporized within a cylinder or cylinders so that the vapor upon expansion performs mechanical work. The internal expansion engine utilizes a non-combusting liquid operating fluid, a linkage apparatus for having an expansion chamber for transforming an expansion of the operating fluid into shaft power, and a vaporizing apparatus for expanding the liquid fluid to vapor.

Abstract: An improved heat exchange assembly for a thermal regenerative machine such as a Stirling cycle engine or heat pump. It includes a sandwiched structure having a center regenerator layer between first and second thermal conductor layers. The regenerator has poor longitudinal thermal conductivity. The outside thermal conductors have good longitudinal heat conduction and sufficient heat storage capacity to supply or absorb the quantity of heat which is transferred between it and the gaseous working fluid of the machine during each cycle of machine operation.

Abstract: A fuel supply system for an internal combustion engine having at least one combustion chamber comprises a supercharger, a fuel intake passage system leading from a source of air to the combustion chamber through the supercharger. A portion of the fuel intake passage system between the supercharger and the combustion chamber is divided into first and second intake passages having incorporated therein primary and secondary throttle valves. The primary throttle valve is operatively associated with a foot-operated acceleration pedal whereas the secondary throttle is adapted to be controlled by a pressure developed inside the fuel intake passage system at a position downstream of the throttle valves. A diaphragm valve unit is utilized to control the secondary throttle valve in response to the pressure inside the fuel intake passage system at that position.

Abstract: A thermal engine arrangement comprising a series circuit charged with a vaporizable refrigerating medium, thermal fluid including a storing and preheating tank, an evaporator connected to the storing and preheating tank, a hood enclosing the storing and preheating tank and evaporator directly exposed to the heat of the air and to solar radiation defining a common heating chamber for the storing and preheating tank and evaporator, a thermal engine connected to the evaporator driven by evaporated thermal fluid from the evaporator, a condenser connected to the thermal engine for receiving spent thermal fluid therefrom, a collector tank connected to the condenser for receiving condensate therefrom and a condensate pump connected between the collecting tank and storing and preheating tank for transferring condensed thermal fluid from the collector tank to the storing and preheating tank. Said condenser and collecting tank being located beneath the surface of the ground in direct heat transfer with the ground.

Abstract: The present invention relates to a method of thermally producing a flow of a working medium, especially for driving turbines and the like. The working medium is heated to a predetermined temperature in a closed space at a pressure, which is higher than the steam formation pressure of the working medium at the predetermined temperature, and in liquid phase in the form of a jet atomized in droplets is tapped in a controlled flow from the closed space through one or more outflow nozzles and against a lower pressure.

Abstract: Temporary plugs are formed in fluid transmission lines by circulating cryogenic fluid through a housing disposed on the exterior of the line to freeze a slug of liquid within the interior of the line. Flow of cryogenic fluid is controlled by sensing the temperature on the surface of the line and sensing the temperature in a housing vent line to indicate a predetermined maximum level of liquid. A temperature sensing and control apparatus is provided which includes dual temperature signal receiving and comparator circuits for operating control valves to open and close at minimum and maximum temperature set points. The control circuitry is operable to open and close the cryogenic fluid control valve in response to variation of the sensed temperature above or below the limit temperatures and in response to a change in temperature indicating an excess level of liquid cryogenic fluid in the chamber formed around the transmission line.

Abstract: A variable capacity binary refrigerant refrigeration apparatus providing improved energy usage efficiency in an operation of a dual evaporator system. One evaporator is used for refrigerating an above-freezing fresh food zone and the other evaporator is used for refrigerating a below-freezing freezer zone. The fluid system includes a rectifier, a separator, and an auxiliary condenser, together with suitable valves for controlling the operation of the apparatus. The system further utilizes control of the cold air circulating fans in effecting the desired improved operation.

Abstract: A spray assembly for a refrigerated display case has inclined bottom plates defining a first chamber below the bottom plates and a spray chamber above the bottom plates. Pressurized water is delivered into the first chamber through a water pipe having a normally closed control valve connected thereto for pressure delivery of water to a spray support pipe which extends from the first chamber into the spray chamber centrally thereof. A spray pipe is mounted on and communicates with the spray support pipe and has a plurality of opposed rows of water outlets for delivering a pattern of pressurized streams of water onto interior surfaces of the case and the undersurfaces of the grates and tubing of the cooling system for washing them down and for successive disposal through a drain pipe depending from the bottom plates.