Abstract: Nestable burn-in trays for semiconductor circuits are provided. The trays are stackable thereby eliminating the need for special storage cabinets. Further the trays are designed not to tilt when being inserted or removed from a burn-in chamber preventing damage to the components on the tray.

Abstract: A process for the treatment of sewage wherein the sludge is innoculated with a bacteria, L. plantarum, and a carbohydrate such as lactose is admixed therewith. The addition of the bacteria and the carbohydrate without more, drops the pH of the sludge to below 4.0. This results in the elimination of pathogenic bacteria and renders the sludge suitable for use as a soil extender without any further environmental constraints.

Abstract: A protective device for a band saw machine is secured to the guards which are normally found on such machines. The device extends downwardly from the guards to the plane of the table, on which the blocks to be cut are placed. The device encloses the band saw and prevents inadvertent contact therewith. The device comprises two members, a fixed member secured to the guard and a movable member secured to the fixed member. The movable member is locked to the fixed member. When a block contacts the device the movable member is released until the block has been cut. The movable member returns to the locked position after the block has been cut.

Abstract: A vehicle with articulated legs is provided for movement across a surface or through water. Each of the legs is adapted to move in at least two planes with reference to vehicle balance. The movement of the legs is controlled sequentially to effect movement over an uneven surface while maintaining the vehicle balance.

Abstract: A linear flaw detector for coated surfaces. An incident beam is provided and sensed above and below the theoretical specular angle. Where a flaw occurs, the reflected signal changes in intensity. By sensing above and below the specular angle, the signal corresponding to the flaw is accented in reference to the signals from the background. The signal corresponding to the flaw may then be separated from background noise and an output provided.

Abstract: A channel culture array having a plurality of V-shaped channels in side-by-side relationship. The array is placed on a base over which a contaminated water, such as seawater, flows. The underside of the array defines in part a zone. The pure moisture in the vapor phase condenses in the zone, coalesces on the underside of the array and permeates into the soil in the channels. The portion of the array contacted by the seawater is liquid impermeable.

Abstract: A sailing simulator wherein a sailboat is tethered to a circular guide rail, which guide rail is slidably secured to the walls of a reservoir. A propeller provides a motive force for the sailboat. Either natural or artificial wind is provided and within the limits of the reservoir all sailing maneuvers, except running with the wind, can be simulated.

Abstract: A channel culture device for agricultural is disclosed. A plurality of elongated reservoir channels are provided adjacent growing channels. The reservoir channels which may be above or within the soil, provide metered amounts of water and nutrients to the growing channels through their walls. An exterior channel is provided which forms the perimeter of a soil bed. The exterior channel includes an inner flexible wall which absorbs the lateral pressure of the soil bed acting on it to prevent buckling of the exterior channel.

Abstract: A vertical slab gel electrophoresis apparatus which has first and second upper electrolytic chambers and a lower electrolytic chamber. A mold assembly containing the slab gel is received in the lower electrolytic chamber and the upper portion of the mold assembly comprises the second upper electrolytic chamber. The first upper electrolytic chamber is spaced apart from the second upper electrolytic chamber. A wick-like material is placed in both the upper electrolytic chambers to provide for electrical communication therebetween.

Abstract: A vapor injector for use with a fuel combustion system which system has an air intake assembly and a combustion area. The vaporizer includes a platform floating on a reservoir of water. A tube extends from the platform into the reservoir a predetermined distance, the lower end of the tube is slotted. The distance the tube extends into the reservoir remains constant regardless of the level of the reservoir. The upstream end of the tube communicates directly with ambient. The vaporizer is connected to the air intake assembly. A negative pressure is applied to the vapor chamber and a saturated air stream flows from the chamber and into the combustion area.

Abstract: A composite beam or girder fabricated from a section of an "I" shaped rolled structural steel beam and a reinforced concrete slab is formed. The bottom flange and the web of the girder are a section of the "I" beam, the top "top flange" is the concrete slab. The steel section is obtained by cutting the web of the "I" beam in a zig-zag fashion into two similar sections, each having a flange and a sawtooth shaped web. Effective interconnection of the steel section and the reinforced concrete slab is achieved by anchor rods snugly fit into holes provided in the top part of the web.

Abstract: A vapor injector for use with a fuel combustion system which system has an air intake assembly and a combustion area. The vaporizer includes a platform floating on a reservoir of water. A vacuum chamber is defined by the platform and the surface of the reservoir. A perforated adjustable sleeve extends from the platform into the reservoir and determines the volume of the vacuum chamber. The volume of the chamber remains constant regardless of the level of the reservoir. The vaporizer is connected to the air intake assembly. A negative pressure is applied to the chamber and a saturated air stream flows from the chamber and into the combustion area.

Abstract: A planter having a longitudinal inverted-V floor and inner and outer walls is disclosed. The lower portion of the inner walls are water permeable. The outer walls and lower portion of the floor define a reservoir containing hydrophilic fill. The inner walls and upper portion of the floor define a cavity containing soil. Plates seal the ends of the floor and wals. Water from the fill in the reservoir transfers to the soil in the cavity.

Abstract: A rope tow for use on a ski slope. Rollers are rotatably mounted one above the other on a fixed frame; the bearing surfaces are in frictional engagement. One of the bearing surfaces has a plurality of ridges. A knotted endless rope is passed through the engaged surfaces. The ridges clamp the rope as it passes therethrough to prevent slippage.

Abstract: A plurality of movable vanes are secured to the top of a structure such as a tall building. A fan to create an independent air stream is disposed within the building. The air stream flows across the surfaces of the vanes. When the building is moved, such as by the wind, this motion is sensed. In response to this movement, the vanes are orientated whereby a thrust force of reaction opposes the motion of the building.

Abstract: A horizontally sliding seal tight door is provided for a warewasher. The leading and trailing edges of the door are formed to mate with guide members secured to the sides of the door opening. When in the closed position the edges of the door in combination with the guide members direct the water contacting the door into the warewasher.

Abstract: A snow-making machine which includes a tunnel-like housing, a fan to create an airstream, and nozzles for the formation of ice nuclei and water droplets. The fan is secured within the housing upstream of the nozzles. An inlet screen is secured to the housing upstream of the fan. The screen is heated to prevent the accumulation of ice on the screen. A shield is placed upstream of the fan to prevent the flow of air across the portion of the fan where ice would adhere to the fan.

Abstract: A cost monitoring system for a dishwashing operation is disclosed. The pumps and/or valves through which the water flows in a dishwashing operation are monitored. Monitoring devices provide outputs on identical cost basis. These outputs are combined and a visual display provided of the cost attendant to the dishwashing operation.