Abstract: For a supermarket having open refrigerated food display cases and adjacent cold isles and having primary refrigeration systems for refrigerating the cases, energy efficient ventilating means for removing the cold air from the isles and supplying replacement conditioned dehumidified air. The ventilating means includes heat pipes for utilizing the cooling effect of the cold leaving air removed from the isles to precool warm outside make-up air and a reversible refrigerating system for further cooling and dehumidifying the precooled outside air. Excess heat available from the primary market refrigerating system is employed to heat or reheat the dehumidified but now cold outdoor make-up air prior to its entry into the market.

Abstract: A device for facilitating the process of draining oil from a sump having a drain plug. The device includes a flexible oil-resistant sheet-like apparatus having a periphery and an oil drain tube and having a wrench shaft traversing the sheet through an oil-sealing gland. The flexibility of the sheet allows the wrench shaft to be aligned with the sump drain plug. Elastic bands attached to the sheet periphery are provided for attachment to structure above the oil sump for raising the sheet periphery above the level of the drain plug whereby the flexibility of the sheet allows it to assume a concave shape so that oil released from the sump is retained and flows out the oil drain tube.

Abstract: A method for determining airflow through an air cooling and dehumidifying coil by measuring the condensate rate and the moist air conditions entering and leaving the coil. The mass air flow, the volume air flow and the cooling capacity are then calculated from data exhibited on a psychrometric chart or by calculating the same result from basic principles.

Abstract: A gage having sensors for observing temperature and pressure. The gage includes a display and an internal computer. A data cartridge separate from the gage but with an electrical plug type connection to it is supplied. The data cartridge has a non-volatile memory on which is stored data relating pressure and saturation temperature of a volatile refrigerant. A program is stored within the gage. The program contains instructions for measuring temperature and pressure from a source, retrieving from the data cartridge saturated temperature data corresponding to the observed pressure, calculating superheat or subcooling and displaying in sequence the observed pressure in absolute or gage terms, the corresponding saturated temperature, the observed temperature and the superheat or subcooling.

Abstract: A freezer box comprising an enclosure resting on soil, the soil having a tendency to freeze from the cooling effect of the freezer positioned above. Pipes, through which a warm fluid flows, thereby being cooled, buried under the freezer enclosure for warming and preventing the freezing of the sub-freezer soil. A refrigeration system having a condenser for receiving refrigerant vapor and condensing it to a warm liquid. An evaporator for producing cooling by evaporating the liquid refrigerant condensed by a condenser. A pipe for conveying the flow of warm liquid refrigerant from the condenser to the evaporator and a heat exchanger positioned to exchange heat between the flow of cool fluid, having warmed the soil under the freezer, and the flow of warm liquid refrigerant enroute through the pipe from the condenser to the evaporator, thereby warming the flow of fluid and cooling the flow of liquid refrigerant.

Abstract: A plate-like guide for precisely positioning a plunge router for the purpose of boring a series of holes in a work piece. The plunge router is provided with a guide bushing having an outside diameter, centrally positioned in the router working face, through which the router cutter can be pushed (plunged). The boring guide is provided with a series of spaced pilot holes positioned on a center line. The inside diameters of the pilot holes are a close sliding fit with the outside diameter of the router guide bushing. The boring guide has five positioning means usable in pairs to precisely position the boring guide with respect to the workpiece. There are two groups of fence holes into which fence pins are screwed to provide a step variable fence for positioning the pilot holes with respect to the working edge of the work piece. There is a centering notch for aligning the boring guide with a centerline drawn on the workpiece.

Abstract: An electronic device for observing temperature and pressure and for indicating pressure, especially very low pressures. The device has a single sensor element for responding to both temperature and pressure. The device includes a sequence timer for causing the device to first observe the resistance of the sensor when the device is first turned on. The timer then applies a voltage across the sensor, causing a known current to flow through the sensor. The current heats the sensor an amount corresponding to density and therefore the pressure of the gas to which it is exposed. A calculating device is provided for calculating the temperature from the observed value of the initial sensor resistance and the pressure from the observed values of current flow and subsequent sensor resistance. A display is provided for indicating the calculated pressure.

Abstract: An attachment for a two wheeled bicycle allowing a mentor to provide a graduated correcting and stabilizing force to the bicycle for aiding a novice rider to maintain balance and gain confidence. The attachment comprises two substantially parallel rigid tubular members having an inside diameter being fastened to a bicycle frame and a hairpin shaped handle having a resilient connection to the members. The hairpin includes a U-shaped portion having extended straight parallel limbs. The end of each straight limb is connected to a spring-like bendable element which is inserted partly or fully into the tubular members. The spring-like elements have a sliding interference fit within the interior of the tubular members.

Abstract: A bubble detector for a liquid stream flowing within a conduit comprising a walled chamber communicating with the conduit interior, the chamber being positioned to trap and accumulate bubbles entrained with the liquid stream. A window in the chamber wall for optically examining the chamber, the window having its inner surface positioned to provide an interface with the chamber contents. Means for distinguishing between liquid and gas in the chamber comprising a light source positioned to direct its light toward the window inner surface, and a light sensor oriented to receive light reflected from the window inner surface the light source being positioned at such angle to the window inner surface that transmission of light with refraction occurs when liquid is present in the chamber and total internal reflection occurs when gas is present in the chamber. And an output device responding to the sensor for taking an action when a predetermined volume of bubbles have accumulated in the chamber.

Abstract: Apparatus for feeding infants especially adpated for use in vehicles such as automobiles, buses, airplanes or other conveyances. The apparatus comprises a container for a liquid food such as milk and a bracket adapted to hold the container. The bracket is equipped with suction cup and hanger means for securely supporting the bracket from the vehicle interior. A fitting, including a manual valve having an inlet and an outlet is positioned at the container outlet and adapted for leaktight communication with the container outlet for the dual purposes of making a connection to the container and for controlling flow from the container. A first short length of flexible tubing provides flow communication from the valve outlet. A nipple, adapted for insertion in the infant's mouth and having a flow passage, is provided. A second short length of flexible tubing is connected to the nipple for providing flow communication to the nipple.

Abstract: Segmented doors for closing a wide opening in an enclosure where the upper door is hinged to the top of the opening, the lower door is hinged to the bottom of the upper door and a wire bail is provided for the purpose of locking the lower door into a V-like or triangular relationship with the upper door. This V-like structure, composed of the locked-together upper and lower doors, can then be rotated upward to a stable triangular or inverted V-like position atop the roof or top panel of the cabinet.