Abstract: In a device for fabricating axially symmetric aspherics in which a workspindle for rotating a workpiece about a first axis is swung within a predetermined angle about a second axis orthogonal to the first axis and a grinding wheel for grinding the workpiece is displaced by a predetermined amount in a direction orthogonal to the second axis, there is provided means for continuously detecting the angle of swing about the second axis of the workspindle, drive means for displacing the grinding wheel, means for continuously measuring the grinding position of the grinding wheel, and means for pre-memorizing, in accordance with the angle of swing, a predetermined position of each point on the predetermined aspherics to be ground and for controlling the drive means so that the grinding position measured by the measuring means is equal to the memorized predetermined position.

Abstract: An apparatus for sizing and finishing batches of lumber including a sizing station and a finishing station. The sizing station includes at least one pair of opposed, power-driven belt abraders operable for dimensionally sizing the lumber to a predetermined thickness by abrading opposed, first and second lumber faces. The finishing station includes additional belt abraders which are staggered on opposite sides of the path of lumber conveyance.

Abstract: A grinding and polishing tool is designed to finish the ends of fiber optic able terminals preparatory to installation or maintenance, the tool being portable to enable the work to be performed in a field environment, and is air driven to eliminate any electrical arcing in hazardous areas, such as around aircraft and vessels.

Abstract: A pair of guide wheels (6) for a hand held abrading device (1) of the endless abrasive belt (2) variety for preventing slewing, side slipping and gouging of the surface of a workpiece (8) when a raised imperfection (9) such as a weld bead is abraded to be flush with the surface (10). The guide wheels (6), mounted on the axle (5) of the contact wheel (3) of the device, are circumferentially adjustable to compensate for different radial dimensions of the sum of the thickness of the abrasive belt and the radius of the guide wheel and include a resilient tire guide ring (11) and a circumferentially round guide surface (12) having different radii at different lateral positions.

Abstract: In a preferred embodiment this improved mobile rail grinding system comprises propulsion and power source means, a plurality of rail grinding cars coupled thereto and a water car. Each rail grinding car comprises a carrier having a support frame for a housing structure upstandingly supported thereon. The housing structure is adjustably movable on the support frame over a predetermined arc generally centered about the center of curvature of the running surface of the track. A motor is telescopically disposed within the housing structure and has a rotatable shaft downwardly disposed toward the track with a grinding wheel concentrically mounted thereon whereby the working surface of the grinding wheel is gravitationally brought into contact with the running surface of the track. A single piston-cylinder assembly, which is aligned with the center of rotation of the motor means and grinding wheel, is disposed so as to control the reciprocal movement of the motor means.

Abstract: A rotary engine housing having an improved inner surface structure for preventing scuffing and wear such as during break-in and heavy load operation of the engine. The housing is defined by a wall having an inner surface provided with a crosshatch topography. The cross-hatching lines are preferably arranged at a substantial angle to the line of intersection of a plane perpendicular to the axis of the piston chamber and the wall surface.

Abstract: A releaseable telescoping device for protecting the threads of a rod of an earth anchor against corrosion is shown. The releaseable telescoping device has a plurality of sheath sections of dissimilar radii connected by small radially extending flanges therebetween to resemble the external configuration of an extended telescope. An expansion plate is connected to the rod above the threads and radially extends therefrom. After packing the telescoping device with a pliable protective material, such as tar, the threaded portion of the rod is inserted in the telescoping device which has one end affixed to the expansion plate. By threading an anchor nut on the end of the threaded rod, the earth anchor is readied for insertion in the ground. Upon insertion of the earth anchor in the ground and rotating the rod, the anchor nut advances on the threads thereby shearing each radially extending flange respectively to close the telescoping device, yet still protect threads above the anchor nut.

Abstract: A heat absorbing panel is provided having an outer casing of resinous material intermixed with aggregate material. A central core is provided within the casing. The core includes substantial amounts of a phase change material having a melting point in the range of normal room temperature.

Abstract: This invention relates to a highly effective fire-proof window consisting of at least one glass sheet mounted in a frame, the frame being such that when the glass sheet is exposed to the effect of heat in a fire, it will be subjected to a somewhat uniform heat effect thus preventing breakage due to the buildup of stresses. Uniform heating is produced by the inclusion of a covering along the edge of the glass which falls away upon heating of the window.

Abstract: A wall structure for a nuclear reactor containment housing or pool is formed by at least two metal concrete forms or panels, each of which has a rectangularly shaped main or base plate of a stainless steel material constituting inner liner portions of the wall structure. Projected laterally from the base plate is a peripheral flange that includes an outer portion, of a dimensional size substantially equal to the dimensional size of the base plate, and an inwardly inclined inner leg portion that is fixed to the base plate inwardly from the side edges of the base plate.

Abstract: A device for facilitating the plugging of holes in dry wall or similar board-like structures includes an upstanding leg which defines a rear support surface and a board-penetrating member for staking the device in position. A plug is emplaced within the hold with the upstanding leg defining a stopped therefor.

Abstract: Roof covering comprising a number of surface covering sheet metal strips and a number of fastening elements to be fastened to a foundation structure and to grip over the respective sheet metal strips and thereby hold them in place against the foundation structure. The surface covering sheet metal strips are highly profiled into a wave shape extending in the longitudinal direction of the strips with a wave length, which is of the same order as the width of each strip which has raised portions and countersunk portions as seen from the intended upper side of the strip and bent edge portions extending along the longitudinal edges of the strip. One bent edge portion has a portion extending in outwards direction from said upper side and preferably a subsequently following portion, which is parallel to the principal surface of the strip. The other edge portion has a portion extending in direction away from the principal surface and preferably is followed by a portion parallel to the principal surface.

Abstract: Apparatus wherein a body includes a passageway having one end adapted to receive the neck of a container and the other end in communication with a closure magazine, and a roller mounted in the body generally tangential to the passageway for rolling engagement with a closure, the roller being configured with a reduced region for passing a closure into generally tangential relation, roller rotation in opposite directions serving to tangentially rotate a closure to closed and opened relation upon opposite directional roller rotation, respectively.

Abstract: Chuck for a bottle capper. In previously known chucks for bottle cappers, especially those made in accordance with U.S. Pat. No. 3,537,231 and its immediate predecessors, there has been a tendency during operation for the chuck jaws to twist or cock which is damaging to the bottle caps. The present invention provides a ball inserted between a portion of the chuck jaw and the walls surrounding and encasing same, which ball positively resists such twisting or cocking without interfering with the desired opening and closing of the jaws. Further means are also provided for improving the smoothness of operation of the apparatus, namely a roller over the drive pin by which rotation of the jaws is effected.

Abstract: An apparatus for wrapping a plurality of loads into a wrapped package comprising a conveyor adapted to receive a plurality of loads and a film dispensing apparatus. This film dispensing apparatus comprises a frame, a ring member rotatably mounted on the frame, a film roll support and brake member mounted on the ring member. A guide wrapping rail is aligned with the conveyor to receive and carry loads transported by the conveyor and is so positioned that one end passes through the ring member. A material handling assembly having two clamp mechanisms, is positioned adjacent the dispenser apparatus. One of the clamp mechanisms is adapted to alternately hold the leading edge of a roll of stretchable material carried by the ring member film roll support in a fixed position while the other clamp mechanism holds the trailing edge of the stretchable material to form the package wrap.

Abstract: A catheter having an elongated folded sleeve of flexible material closely received on a shaft of the catheter. A method is provided for placement of the sleeve on the catheter shaft.

Abstract: A rigid housing module is formed of a plurality of module walls connected to one another at a predetermined angle other than 0.degree. and 180.degree.. Each module wall has an assembly of identical planar structural elements each having the shape of a trapezoid. Each element has a relatively long inner side, a relatively short outer side and two diagonal sides constituting, respectively, the long and short bases and the two non-parallel sides of the trapezoid. The elements of each assembly are arranged in a juxtapositioned series wherein all inner and outer sides are parallel to one another and wherein adjoining elements are connected to one another alternatingly along adjoining outer sides and along adjoining inner sides and further wherein the elements are oriented at a predetermined oblique angle with respect to an inner assembly plane in which the inner sides lie.

Abstract: A machine for wrapping elongated articles of the type in which the machine advances a strip of wrapping material past a loading station, folds the strip into a tube around the articles and longitudinally seals the strip as it is advanced past a longitudinal sealing station, and thereafter transversely seals the tube between the articles and severs the tube to form separate packages.

Abstract: A grille for use as a sunscreen, decorative facing, vision barrier and the like is made up of a multiplicity of modular pieces, each of which is of uniform cross section along its length. Each piece has walls terminating in spaced-apart parallel edges that define a base plane of the piece, and each piece is paired with another piece by bringing the edges of the two pieces together to produce a closed cell. An edge flange extends outwardly from a portion of the walls adjacent each edge of the piece, and a pair of closely-spaced, parallel slot flanges extend outwardly from a portion of the walls and define an outwardly open slot that is centered on a medial plane perpendicular to the base plane and parallel to the edges of the piece. The slot is, moreover, spaced from the line of intersection between the base plane and the medial plane, which line may be considered the axis of the piece, a distance substantially equal to one-half the perpendicular distance between the edge flanges.

Abstract: A construction for applying tape around the perimeter of an object wherein a supply of the tape is provided on a spool. An end of the tape is clamped, and the spool is then transported around the object with the tape then unreeling and being pressed into engagement with the object. Independently driven roller means are mounted for movement back and forth over one surface of the object, these roller means pressing respective tape ends onto the surface in overlapping relationship. This action is synchronized with clamping and severing action to prepare the system for a succeeding operation. The object to be taped is moved into position by means of a conveyor and a vertical lift. Stop means control the extent of movement of the lift, and this feature combined with the tape-applying mechanism makes the construction operable for a wide range of sizes of objects to be taped.

Abstract: A machine for stretch wrapping articles, such as trays of produce, poultry, meat and the like, has a wrapper feeding mechanism which positions measured lengths of stretchable wrapping material between an elevator mechanism and a folding mechanism which is located above the elevator mechanism and includes a plurality of relatively movable folding plates. Clamping mechanism releasably secures opposite marginal portions of the positioned wrapping material while the elevator mechanism raises an article to be wrapped into stretching engagement with the wrapping material, held by the clamping mechanism, and pushes the article up through an opening of adjustable size defined by parts of the wrapper feeding mechanism and the folding mechanism to stretch the wrapping material tightly over the article. Portions of the taut wrapping material are then folded under the article by the folding mechanism.

Abstract: An improved riding mower is described of the type having propulsion means, a seat for the operator, and at least one cutting head which is hydraulically driven. The cutting head is controllable between an operating norm and a non-operating norm by means of a hydraulic valve having two moveable spools, and the cutting head is moveable between a cutting position and a transport position by means of a hydraulic cylinder. A solenoid is employed to control one of the moveable spools. A first electrical switch actuated by pressure in the seat, a second electrical switch actuated by the hydraulic cylinder, and a third electrical switch actuated by the second of said spools independently actuate the solenoid in order to stop operation of the cutting head when the operator is out of the seat, when the cutting head is not in cutting position, and when the operator does not desire cutting action.

Abstract: An eye protection device comprising a soft, flexible plastic envelope forming a goggle enclosure contoured to comfortably conform to the angular anterior cranial features of a particular mammalian, non-human animal, such as a dog, two elastic band means for extending in different directions for securing said envelope to the cranium; the envelope having venting means for permitting indirect exposure of the animal's eyes to the atmosphere; and a plastic window positioned at a front opening in the envelope.

Abstract: A harvester for beans and like crop includes a pick-up reel having a width equal to the overall width of the harvester and leading to a first, cleaning, conveyor which terminates at an air passage incorporating a fan for generating a generally vertical air flow. Where the vertical air passage meets the cleaning conveyor, a rotary valve is provided which permits the passage of the beans and other parts of the crop but prevents or at least restricts the passage of the air flow into the space above the upper run of the conveyor. The rotary valve may take the form of a rotary vaned assembly having six vanes each of which is secured to one face of a hexagonal shaft and various forms of rotary valve are also described.

Abstract: A semi-mounted or trailed agricultural mower has vertical axis crop-cutting rotors and a rigid rectangular open frame mounted above the rotors to support the rotors. The frame has at one end a ground-engageable support wheel secured to a rear beam of the frame and at the other end a headstock secured to a front beam of the frame. At least one of the rotors is trailed from the front beam on a linkage permitting the rotor to rise and fall relative to the frame.

Abstract: Tobacco handling apparatus that receives tobacco from a source, such as a trailer, and elevates it by a conveyor to a discharge end from which it is discharged in a flow path having a substantial maximum horizontal extent disposed above a container that has a longitudinal horizontal extent aligned with and underneath the flow path for receipt of the tobacco leaves therefrom in condition for subsequent curing. A leaf distributing mechanism is included for varying the horizontal extent of the flow path within the maximum extent in a generally uniform manner to cause the leaves to be distributed substantially uniformly along the longitudinal extent of the container. The container is preferably a large size bulk curing container and the leaf distributing mechanism is preferably a plurality of deflectors which are oscillated laterally in conjunction with a longitudinal reciprocating movement. The leaves can be handled after harvesting at the barn or while harvesting takes place in the field.

Abstract: Agricultural mower has vertical axis crop-cutting rotors mounted for floating vertical movement relative to semi-mounted mower frame. Draught forces are transmitted to each rotor through a draught member below the rotor on which the rotor is journalled. The draught member projects rearwards beyond the cutting circle of the blades and is connected to the frame by an upwardly-extending structure including a parallelogram linkage.

Abstract: A herbage trimmer has a larger, toothed rotatable cutting blade provided with a circular array of bosses. A smaller, toothed rotatable cutting blade lies flat against the larger blade and is positioned within the tooth tip circle of the larger blade so that some of its teeth overlap with some of the teeth of the larger blade. The bosses on the larger blade are in gear-tooth relationship with the teeth of the smaller blade so that the blades counter-rotate to produce a continuous shearing action between the over-lapping teeth of the blades.

Abstract: Spinning machine apparatus is provided which includes a plurality of open-end spinning units, each of said spinning units being provided with a bobbin holder for holding bobbins to wind up the thread produced at the spinning unit. A supply station is fixedly disposed at each spinning unit for storing a supply of empty spool tubes provided with starter threads. A traveling servicing device is guided on tracks adjacent the spinning units and includes lever mechanisms for effecting removal of a full bobbin and replacement thereof with one of the supply of empty spool tubes at the respective supply station. According to preferred embodiments, the method of utilizing the apparatus includes manually filling the supply stations at the spinning units, with the traveling servicing device being automatically operated to effect the tube transfer operation.

Abstract: A method and apparatus for yarn piecing on an open-end spinning machine is provided which includes a plurality of predetermined working programs for carrying out the piecing steps. To accommodate automated provision of quality pieced places in the yarn being spun, a yarn monitoring device is provided for detecting the quality of the piece place in the yarn, which device generates a signal controlling the selecting of one of the predetermined working programs for the next piecing operation at the spinning assembly. In particularly preferred embodiments, a storage device is provided for storing information as to the particular working program utilized during the last successful piecing operation at the respective spinning assemblies, with retrievability of this stored data to select the same successful piecing program for the subsequent piecing operation at such spinning assembly.

Abstract: A control circuit for an electronic timepiece in which a digit selection switch is connected to a timer circuit which generates an output signal only when the digit selection switch is actuated for a given interval of time. An output signal generation means is coupled to the timer circuit and rendered operative in response to the output signal from the timer circuit to generate an output pulse. A digit selection circuit is responsive to the output pulse from the output signal generation circuit for selecting a digit to be corrected in a timekeeping circuit.

Abstract: An injection molded casing for an electronic time-keeping module includes integrally-molded wrist band and clasp portions adapted to fit over the wrist of a user. The watch casing and band are formed over a metal base strip which provides protection for the time-keeping module while maintaining sufficient pliability in the wrist band portions for a comfortable fit. The watch casing includes one or more control buttons in the form of deformable integrally-molded wall sections which may be pushed inwardly to control the operation of the time-keeping module within the casing without compromising the protection provided to the module by the housing against water and outside contaminants.

Abstract: The clock comprises a display substrate having hour, ten minutes and minute display members each constituted by a plurality of display digit openings which are arranged in the form of a letter 8, a light diffusion plate situated on the back of the display substrate and formed with a plurality of shutter guide openings corresponding to respective display members, a lamp house block positioned to the rear of the light diffusion plate and provided with a plurality of lamp openings corresponding to respective display members, a plurality of lamps received in the lamp openings, a frame for supporting the display substrate, the light diffusion plate and the lamp house block, a plurality of shutter units positioned to the rear of the lamp house block and extending to the front surface of the light diffusion plate, each shutter unit including a plurality of shutter members cooperating with the display digit openings for selectively opening and closing the same, and a plurality of cam control mechanisms associated wit

Abstract: There is disclosed a pendant comprising a sleeve, to which a writing implement may be attached, in combination with a timepiece. The invention provides an arrangement whereby the timepiece, when the pendant is worn around the neck, is readable in the correct position. The timepiece has a housing which is removably connected to the sleeve by means of a plurality of detents. One of the gaps between the detents is wider than the remainder, a projection fits in the sleeve for the reception of a clip in this wider gap, the sleeve has two opposed apertures for pulling through a necklace-type strip and the wider gap fits into the sleeve in the position such that the timepiece is always read in the correct position.

Abstract: A method and apparatus for control of an integrated combined cycle Brayton-Rankine engine is disclosed. The engine has a combustor and main power turbine operating on the Brayton cycle. Combustion air is supplied by a compressor independently driven by a Rankine vapor turbine. The closed loop Rankine cycle derives its heat energy from the exhaust of the Brayton turbine. Engine speed and power level are controlled by varying the fuel flow to the combustor and by throttling the air flow to the compressor.

Abstract: A forced air control valve for an air injection system in an internal combustion engine is shifted during cold engine operation to divert air flow to the exhaust manifold upstream of a catalytic converter bed to supply air to the exhaust gases for further combustion prior to entry in the catalytic converter. A diaphragm operated main valve is responsive to a vacuum from the intake manifold for diverting air to the exhaust manifold and a temperature activated vacuum switch shuts off the vacuum when the engine warms up. Upon deceleration during cold engine operation the control valve is shifted to divert air away from the exhaust manifold.

Abstract: A vacuum union having a tubular body adapted for transmitting a vacuum signal from an intake pipe of an internal combustion engine of a vehicle to a vacuum-operated brake booster of a vehicle brake device, and a branch pipe adapted for transmitting a vacuum signal from the tubular body to other vacuum-operated engine controlling devices. An orifice for restricting the level of the vacuum signal, to be transmitted to the brake booster, is located downstream of a branch pipe with respect to the intake pipe. Therefore, a drop in the vacuum level is effectively decreased for maintaining the proper operation of the brake device, even if the controlling devices are damaged, thereby causing the branch pipe to be opened to the atmosphere.

Abstract: For the hydraulic brake system of a vehicle such as a farm or industrial tractor having brakes on the right and left rear wheels for both braking and steering, flow control means operatively interconnecting a source of hydraulic pressure available when the vehicle is operating, a hydraulic fluid reservoir and a manually actuated brake applicator means such as a brake pedal, so as to provide power braking. The flow control means also provides for manual braking when hydraulic pressure is not available. A separate relatively large fill piston and small pressurizing piston used in manual braking are in combination with the power brake valve. An unloading valve is provided for cooperation with the fill piston during both the power and manual modes.

Abstract: Sensible heat in the hot effluent gas stream leaving a partial oxidation gas generator for the production of raw synthesis gas, reducing gas, or fuel gas is used at its maximum temperature to produce a continuous stream of superheated steam at a pressure which may exceed the pressure in the gas generator. The by-product superheated steam may be used as a dispersant or carrier of the fuel feed to the generator or as a temperature moderator. Optionally, a portion of the by-product superheated steam may be used as the working fluid in a turbine to produce mechanical work or electrical energy or both. The high steam superheat temperature results in a higher conversion efficiency. A shell and tube heat exchanger in which a stream of steam or cleaned generator gas is continuously bled from inside the tubes to the outside, or the reverse is employed. The bleed stream mixes with the effluent gas stream passing through the heat exchanger.

Abstract: A reciprocating engine utilizing the mutual repulsion of charged air particles to drive a work-producing means. The engine has pistons reciprocating in cylinders with cylinder spaces between cylinder heads and the pistons. A first enclosed porous conductive electrode is located in fluid flow communication with the cylinder space, typically within the cylinder space itself. The first porous electrode is electrically connected to a second conductive porous electrode in a separate housing. Air is admitted into the first electrode while fuel is admitted into the second electrode. As the air in the cylinder space and first electrode is compressed as the piston moves toward the cylinder head, a current flow takes place from the first electrode to the second electrode because of valance attraction between fuel molecules and oxygen electrons resulting in the ionization of oxygen and fuel.

Abstract: A filter dust ejector with a built-in check valve as part of the exhaust system of an internal combustion engine, the ejector consisting of an ejector housing with a suction connector for an air hose leading to the air intake filter, and inlet and outlet pipes forming an annular suction gap in a venturi-type exhaust flow profile, thereby creating a negative pressure in the ejector housing. The inner extremity of the suction connector is a valve seat for a pivotably supported flapper serving as a check valve which is closed, when a pressure condition in the ejector housing tends to create a reverse flow of exhaust gas through the suction connector to the air intake filter.

Abstract: A pumping system deriving power from a heat source and heat sink, for producing either a liquid or gaseous output, utilizes the available thermal potential energy for conversion to work. A liquid, such as a cryogenic liquid is pumped to a first pressure and at least a portion of the output is pumped to a second and higher pressure. The liquid at the higher pressure flows through a heat exchanger to vaporize the liquid to a gas which drives a turbine for generating power to power the pumps or an electrical generator or both. The exhaust output of the turbine flows into the output of the first pump or stage. A recondensing heat exchanger may be used to recondense the turbine exhaust. The system may produce a liquid output or a gas output.

Abstract: An efficient valve position controller adapted for use in a steam turbine power plant for efficiently positioning a plurality of steam admission valves to substantially effect a desired power generation level is disclosed. The power plant includes a boiler for generating steam to the turbine at a boiler throttle pressure that is governed by a pressure set point; a valve control means which is governed by a reference signal corresponding to the desired power generation level to position the plurality of steam admission valves in a state according to a predetermined valve positioning pattern based on the value of the reference signal; and an electrical generator driven by the steam turbine to generate electrical energy. A plurality of values of the reference signal are predetermined as being related to efficient valve position states for regulating steam admission to the turbine.

Abstract: A system which integrates the controls of a steam turbine power plant for minimizing power plant energy losses substantially caused by steam flow valve throttling is disclosed. The steam turbine power plant includes boiler pressure controls for controlling the boiler throttle pressure of a steam producing boiler and turbine-generator controls for positioning a plurality of turbine steam admission values to regulate the steam flow conducted through a steam turbine which governs the electrical energy generated by an electrical generator at a desired power generation level. The turbine-generator controls predetermines a plurality of valve position states to establish a predetermined valve grouping sequential positioning pattern for the steam admission valves to regulate steam flow through the steam turbine across the range of power generation, each predetermined state substantially corresponding to a minimum of valve throttling losses.

Abstract: An air conditioning system has an evaporative cooler and a refrigerated cooler connected to a common duct connecting both of the coolers to a cooled space. A space thermostat senses space temperature of the cooled space and initiates cooling responsive thereto. A cooler selection control selects one of the coolers for cooling the cooled space responsive to the relative humidity and temperature of air outside the cooled space. The selection control delays starting of the refrigerated cooler a cool down period after the initiation of cooling. With the evaporative cooler employed in a system with, or in a system without, the refrigerated cooler, the evaporative fan is started a wetting period after the starting of the evaporative pump of the evaporative cooler to wet the evaporative pads. Additionally an exhaust vent opens when the evaporative fan of the evaporative cooler is operating and closes when the evaporative fan is stopped.

Abstract: A compression refrigeration system having means for causing the accumulation of refrigerant in a selected area when the refrigeration system is inactive by providing a reservoir having a material therein that has greater miscibility with refrigerant than the compressor lubricating oil so that the liquid refrigerant within the inactive sealed system will migrate by gaseous transfer into the lower pressure area in the reservoir and go into solution with the material.

Abstract: A method for the thermodynamic assisted compression of gases wherein a gas is alternately compressed and expanded with addition of heat regeneratively. The basic method is applicable to a variety of uses such as gas compression, turbines and in heat temperature boosters. Working fluids may be either gases or vapors. Heat may also be removed during compression steps and added during expansion steps. Process can be used with both steady flow and non-flow apparatus.

Abstract: A defrost control system includes in an electrical control circuit, a number of relay coils and contacts responsive thereto for insuring a delay in termination of the defrost mode and reverse refrigerant flow to the outdoor coil of the heat pump system to delay coil operation as an evaporator, and to effect automatically fan motor reversal and energization to blow air downwardly over the outdoor coil fins to assist gravity in removing the condensate during delay in initiation of heat pump heating cycle, thereby preventing refreezing of condensate on the coil fins.

Abstract: An internally piloted reversing refrigerant valve for selectively porting fluid from a compressor into an air-conditioning system doubling as heat pump through a five-ported valve of which ports one, two, three and four are employed with air-conditioning system when valve is in a first position, while when the position of valve is changed to a second reversed position, ports one, three, two and five are employed with heat pump system, said valve so constructed that the first and second ports allow fluid to be delivered to a refrigeration system for a return to compressor through ports three and four of a valve housing provided with a slidably movable piston assembly and a pair of operators including valve means incorporated therein so as to allow a complete fluid reversal and refrigerant delivery from compressor to heat pump through the first and third ports for a return to compressor through ports two and five facilitating means for a simple valve to serve two flow patterns through an easy valve shifting ope

Abstract: The present invention relates to a refrigeration system of the type having an air cooled condenser which includes the further capability of producing a heated liquid in a liquid cooled or, "heat recovery" condenser. The system includes compressor means for compressing a vaporized refrigerant, air cooled condenser means having fan means for forcing air in heat exchange relationship therewith, liquid cooled condenser means for producing a heated liquid, and evaporator means for expanding and vaporizing condensed refrigerant in heat exchange relationship with a refrigeration load. Control means are provided for the system and include first means for sensing the demand for heated liquid from the liquid cooled condenser, and second means responsive to the first means for reducing the capacity of the fan means in response to increased demand for heated liquid.