Abstract: An aeration and filtering system for an aquarim includes a porous filter bed that is spaced above the tank bottom with pump means located in the chamber defined below the filter bed and having an upper inlet for receiving oxygen-enriched liquid from adjacent the liquid level in the tank and at the same time receiving oxygen-deficient liquid from adjacent the bottom of the tank. These two liquids are then mixed within the pump to provide an oxygen-enriched liquid which is fed through a discharge port that is directed generally parallel to the liquid level and slightly below to provide an exercising environment for aquatic life.

Abstract: A tray-type freeze drying device determines the end of a first stage of a freeze drying process by regularly and drastically reducing the pressure surrounding the product being freeze dried. No decrease in product temperature during the reduction in pressure indicates the completion of the sublimation of water from the product and the end of the first stage of drying. A decrease in product temperature during the drastic reduction in pressure indicates the need to continue the sublimation procedure and the first stage of drying.

Abstract: A barbeque kettle includes a bowl and a cover with the bowl having a food support grid adjacent an upper rim and a charcoal grid below the food grid along with a cover holder adjacent the rim of the bowl. The cover has a removable thermometer that can sense the initial temperature of the kettle and can also be used as a food thermometer. A pair of charcoal baskets are positionable on the charcoal grid for direct or indirect cooking.

Abstract: Large, heavy manufactured goods, assemblies or articles are packaged for storage and transport in a skeletal frame formed of structural foam material such as high density polyethylene. Cross brace and cross brace mounting members extend between peripheral members of the skeletal frame that is otherwise free of interconnecting side wall web material. The cross brace mounting members support the article spaced within the frame while they distribute the weight of the supported article to the peripheral members. Fasteners such as bolts and bands can secure an assembly or article to the cross brace mounting members of a shipping frame. Upper and lower skeleton halves can include integral leg members, or the leg members can be separate parts to be assembled to the skeleton halves. Separate leg members facilitate transporting the shipping frame flat with the skeleton halves nested on one another.

Abstract: Semiconductor devices such as integrated circuits and discrete transistors are mounted on cards and the cards are installed on raised racks extending up from the bottom of a tank forming a burn-in chamber. The racks are individually lowered to immerse the cards and operating devices in a bath of liquid heat exchange medium at an elevated temperature. The racks are individually accessible through aligned segments of a segmented cover to reduce the intrusion of room water vapor into the burn-in chamber. The elevated temperature of the medium is maintained during the procedure by pumping the medium over mechanical cooling coils to remove excess heat produced by the operating devices. A lead screw and lever mechanical combination provide variable speed pumping, to accommodate changes in medium viscosity, from a fixed speed motor. The pumping also mixes the medium around the cards and devices to produce uniformity in the medium temperature.

Abstract: A laminating system includes a pair of heated laminating rollers for drawing laminating film from supply rolls and preheat members between the supply rolls and the laminating rollers with the rollers being heated by circulating oil. The preheat members have surface area consisting of a synthetic resin polymer having areas of chromium interspersed therein. a single-sided laminating system is also disclosed with a laminating roller covered with a chromium-synthetic resin polymer.

Abstract: A serving mat includes a pair of superimposed sheets sealed to each other to define a chamber having a free-flowing liquid medium therein with a plurality of discrete articles suspended in said liquid medium and movable by manipulation of the liquid medium in the chamber.

Abstract: A dispensing device includes a base having an upstanding post with a gripping means on the upper end biased to a first position and movable to a second position. The hollow post telescopingly receives a roll of articles separated into individual segments and the gripping means can be pushed from the first positon to frictionally grip the roll between the base and the gripping means so that the article can easily be separated from the roll without any rotation of the roll.

Abstract: A sear bar for evaporating greases in an outdoor gas grill consists of an inverted V-shaped member having a pair of flat inclined walls defining an included angle of less than 90.degree. so that grease will evaporate while flowing across the heated inclined walls.

Abstract: An attachment for a barbecue grill consists of a generally L-shaped support frame that is formed by bending wire to a generally U-shaped configuration with the free ends of the wire having downwardly bent portions that act as hooks for supporting the frame on clips attached to the rim of the grill. A serving board has grooves extending from the lower surface thereon for receiving the rod portions so that the board is securely positioned on the frame and also has gripping openings so that the board can easily be removed for use as a serving tray.

Abstract: A gas grill includes a cart and a cooking vessel supported on the cart with the cooking vessel having a lower gas burner assembly, an intermediate sear grid assembly and an upper cooking grid. The sear grid assembly includes inverted V-shaped sear bars that cause evaporation of greases from the food on the cooking grid. The cooking vessel has a lower removable grease pit for any unvaporized grease and a separate burner unit is supported on the cart. The cart also has a fuel indicator device for supporting a portable tank. The burner assembly is constructed to be assembled without the use of any tools.