Abstract: A conventional back hoe type earth moving machine is equipped with an earth fracturing ripper tooth mechanism attached to the back hoe boom and dipper so that it can not only be manipulated into working position as required but also stored out of the way, when the back hoe bucket is operated for conventional digging. Two hydraulic cylinders or rams are attached to the center pivot pin of the back hoe boom and dipper, for extending, retracting and manipulating the ripper tooth. Support for the rams is provided by a combination of the back hoe boom, the dipper and the bucket which are extended to form an "A" frame. The distal end of the "A" frame is supported by resting the back hoe bucket on the ground. The back hoe boom, dipper and bucket "A" frame, supported at each end, will resist, at the "A" frame apex, the reactive force required to move the ripper tooth into and upwardly through the material to be fractured.

Abstract: A multi-station laundry feeder including supply apparatus for a plurality of article conveyors, multiple stations at each conveyor, and an article transporting conveyor utilizable by the multiple stations for transversely placing articles on the transporting conveyor. The operators remove individual articles from the supply conveyor, drape them across the transporting conveyor, touching an adjustable bar which is positioned to automatically appropriately align the articles, and release them.

Abstract: A sheet of electroluminescent material in the shape of an alphanumeric character is embedded in a rigid base. An exciter unit for transforming incoming electric power to the appropriate voltage and frequency for driving the luminescent material is also embedded in the base behind the character. Each character, base and exciter unit thus form a self-contained display module. A universal interconnecting member is used to electrically and mechanically interconnect the module to any other module with the proper horizontal or vertical spacing. The gap between adjacent display modules may be filled with either a cover or an electrically active header which contains such devices as an electric eye for applying power to the modules after dark or a rechargable battery charged by either an external power supply or an internal solar cell.

Abstract: A container to be attached to a shoestring or the like and adapted to contain information regarding the medical condition and/or identification of the wearer. The container is made of two halves formed from a resilient plastic material, which define between them a cavity in which a specially-shaped piece of paper with the necessary information can be placed.

Abstract: An outdoor sign and housing assembly is provided which is formed of aluminum extrusions, or the like, and which define, in the embodiment to be described, a housing for a plurality of illuminating elements, such as fluorescent lamps, and their associated ballasts and other electrical components; and which also form one or two frames which may be hinged to one or two sides of the housing, and which are constructed to support either a rigid or flexible translucent sign. The flexible sign is supported on its frame by a plurality of specially constructed clamps, and a special tool is provided for tensioning the flexible sign into a taut condition on the frame, after which the clamps are applied. The frames, and the signs supported thereon, may be individually swung open about a hinge axis to permit access to the interior of the housing, and may be individually removable to facilitate the installation of the signs on the frames and of the internal components in the housing.

Abstract: A crossarm type support having a vertical post formed from a rectangular tube having a set of internal splines. A spike element molded from polycarbonate plastic resin is inserted in the lower end of the post and held in place by a pair of spring loaded pins. The post is installed in the ground by pushing on a horizontal portion of the spike element with the heel of a shoe. A crossarm is provided at the upper end formed from a second rectangular tube having a first channel along its lower edge and a second channel along its upper edge. The vertical posts and crossarm are mortised to form complementary notches for mounting the crossarm to the post. The post and internal splines interlock with the crossarm and channels to provide internal support and rigidity to the joint. The lower crossarm channel is formed to receive plastic hooks for attaching a hanging sign and the upper channel is formed to receive a set of plastic inserts for receiving an interchangeable rider sign.

Abstract: A starter for use in the loading of projectiles in a muzzle loading firearm. Means for aligning the starter with the bore of the firearm is provided by a rod which is received in the ramrod guides mounted on the barrel of the firearm. The rod also serves as a ramrod.

Abstract: A manipulatable structure that contains a series of linked units. Each unit contains a plurality of rhombic-shaped panels that are hinged along their oblique edges to create a collapsible enclosure that can be used to create two dimensional patterns when the panels are folded into one of two available common planes or any number of three dimensional structures when positioned between the two common planes. Each unit, in turn, is hinged to an adjacent unit along abutting oblique corners to create a chain that can be symmetrically formed by linking the units in a repeating linear pattern or asymmetrically formed by linking the units in a random fashion.

Abstract: A steering mechanism (10) for a scale-model vehicle (12) includes a pair of journal boxes (50), (51) having arcuate racks (56), (57) provided on their lower and upper cover plates (54), (53), respectively, for coacting with pinions (62) to swing wheel-carrying axles (60) through predetermined turning arcs when vehicle (12) is moved in reverse. Stops (110) and (112) are engaged by axles (60) to limit the turning arc in reverse and to hold the wheels (44), (46) on a straight course when vehicle (12) moves forwardly.

Abstract: An inertia device which controls and produces a sensory effect as a function of a differential in the angular velocities between primary and secondary bodies rotating on a common axis with a friction drive therebetween, commutated by differential speeds of rotation, and with the sound effect functional as a result of said differential speeds of rotation, and all of which is operative through rotation of the primary body in either direction of rotation with the transfer of kinetic energy into the secondary body for control and operation of the sensory effect.

Abstract: A toy vehicle and toy vehicle game are disclosed in which a plurality of controllable toy vehicles collect current from conductor strips in a slotless track and switch lanes when current polarity is reversed. A toy drone car is used in the game which collects current from the strips associated with the other cars and it includes an electrical circuit which insures that current of only a predetermined desired polarity is supplied to the motor in the vehicle to propel the vehicle in a forward direction around the track. As a result, the vehicle is driven about the track in a forward direction regardless of the polarity of current applied to the collector strips. In addition, the drone car includes an automatic steering system which causes the drone car to continuously switch lanes in an apparently random alternating manner as it moves along the track.

Abstract: A garden cloche comprising an umbrella structure, a spike 12 and a handle 11. A canopy 10 of transparent sheet plastics material is supported on a framework so that an apex part 23 of the shaft 20 projects through the canopy and carries the handle above the canopy. A bottom end part 32 of the shaft serves as or is located in said spike means which is inserted into the soil 40 of a garden to locate the periphery 30 of the canopy proximal to the surface of the soil 40.

Abstract: A system for growing and harvesting perennial, hedge-type, harvestable plants is provided which permits greater utilization of sunlight for photosynthesis, more efficient use of the land, and control of evapotranspiration through wind control. The plants are in rows, running in a substantially east-west direction, and are cut and harvested so that their "sun" surface(s) is not horizontal, but, rather, faces the direction of the sun's rays during the peak growing time of the day throughout the prime growing season of the year. The surface is generally cut to expose a maximum growing surface of the plant to sunlight and in this sense is analogous to solar collectors in solar home or hot water heating systems. The rows of plants are so spaced relative to adjacent rows to permit sunlight to fall on most of the planar surface of the hedge, but such that one row will not cast a dense shadow on a portion of another row.

Abstract: There is provided an assembly for opening and closing a closure lid of a grain bin or silo from a remote position, such as ground level. When a flexible cord or cable connected to the upper end of a lower lever is operatively pulled there is relative pivotal movement between this lower lever and an upper lever against the influence of a spring acting therebetween, with a latch arm the upper end of which is pivotally connected through an operating arm to the upper end of the upper lever being initially pivotted relative to the closure lid to move a latch member presented by the latch arm out of engagement with a fixed bracket member with resilient deformation of a relatively stiff but resiliently deformable strip connected between the closure lid and the operating arm. Thereafter, the closure lid is pivotally raised about a fixed pivot axis thereof. Releasing of the cord or cable results in the closure lid being urged under the influence of the spring pivotally to be lowered to its closed condition.

Abstract: An improvement in casement windows provides a mullion portion which is removable to allow for emergency egress through the window, a pivotably disengagable connection being formed between one end of the mullion portion and the head jamb of the window frame, and a tongue and groove connection being formed between downwardly and outwardly inclined complementary surfaces on the other end of the mullion portion and the sill of the window frame that allows the mullion portion to slide outwardly from a position seated in the frame to effect separation of the mullion portion from the frame simply upon opening of a sliding latch.

Abstract: A metal sash-window has been slidably arranged in a wooden window-frame without the intermediary of a metal window-frame mounted in the wooden window-frame.

Abstract: An improved servicing attachment, for occasional use on a carding machine, having a support beam traversing a roller of the carding machine and removably mounted on the carding machine, a traversing unit reciprocably mounted on the support beam and a motor on the beam for moving the unit, a motor and driven spindle on the unit, a grinder or fettler on the spindle for treating the card clothing on the roller of the carding machine, support structure including stub axle supports on the beam mating with bearings on the carding machine which are aligned with the axis of the traversing unit driven spindle so that there are a range of angles about the axis of the spindle at which the attachment can be oriented without altering the setting between the grinder or fettler and the roller being treated, and handles on the beam ends for lifting the servicing attachment onto and off of the carding machine being serviced.

Abstract: A grinder is supported within a pipe, the support being arranged to adjust the movement of the head of the grinder radially and axially of the pipe axis to bear against internal cracks in the pipe wall.

Abstract: An apparatus for adjusting the torsional output of a flexible pivot assembly is provided. The apparatus precisely rotates the flexible pivot to a maximum rotational angle at which the torsional output of the flexible pivot is trimmed to a predetermined value by an air abrasive unit. After the trimming the flexible pivot is rotated to an intermediate rotational angle and its torsional output rechecked. Electronic circuits are included to automatically control the air abrasive unit to trim output torque of the flexible pivot to its desired value, and to signify the torsional output at the intermediate rotational angle is within specifications.

Abstract: An improved insulated vinyl siding system for houses and other buildings is disclosed. A sheet of foam insulation is disposed and held in place in the back of the siding panels in such a way to leave two air spaces, one between the insulation and the siding panel and the second between the insulation and the house surface. Openings are provided in the siding panels and act in cooperation with openings in the house to allow escape of trapped moistured air from the second air space.

Abstract: A prefabricated building in which utilities are provided for in a core unit in which ceilings are provided by prefabricated panels and in which the panels are tied to roof trusses.

Abstract: A weatherproof enclosure for electronic equipment includes a base portion and a mushroom-shaped hood portion. When unlatched, the hood portion rises by spring action to permit full access to the electronic equipment mounted on the base portion. A moderate force on the hood, assisted by an internal counterweight, serves to return the hood to the latched position.

Abstract: A tower is disclosed for the elevated storage of water or other liquids. The tower includes a concrete cylindrical shell having an upper distal portion, and a steel tank mounted co-axially at the upper distal portion. The tank has a lower floor opening for the shell distal portion to pass therethrough. The shell distal portion has a plurality of peripheral openings adjacent to the tank floor opening. A continuous tank floor passes through the shell peripheral openings, and sealingly closes the tank floor opening. The tank floor supports the tank and liquid therein, and connects the tank to the cylindrical shell.

Abstract: An adjustable angle eave apparatus for building curtain walls, skylights, greenhouses and the like, comprises an elongated sill forming a gutter for receiving moisture from a sloping roof structure projecting upwardly thereof. The roof structure includes one or more sloping rafters and an elongated baffle member secured to the lower ends of the rafters and extending along the sill forming a framework for supporting one or more roof or skylight panels. A bearing system is provided for pivotally interconnecting the sill and the baffle members permitting angular adjustment of the slope angle of the roof structure and an elongated sill cover is provided for enclosing the space between an outer edge portion of the sill member and an upper edge portion of the baffle member of the roof structure to provide a weather sealed enclosure at the eave.

Abstract: To reduce the weight and increase the lifting capacity of a multi-section telescopic crane boom, a single hydraulic cylinder for the full extension and retraction of individual boom sections is anchored in the relatively stationary boom base section. A sled structure surrounding the single cylinder and moving therewith has guided engagement through plates fixed to the movable boom sections at or near their rear ends. Driving finger mechanisms on opposite sides of the sled are biased toward driving engagement with the plates of the movable boom sections and are retractable into chambers of the sled. A cooperative locking pin operating assembly for the movable boom sections is fixed on the forward end of the boom base section and includes power retracting devices which operate mating retracting cranks and locking pin sets individual to the movable boom sections when the retracting cranks are aligned beneath the power retracting devices.

Abstract: A method and apparatus for permanently extending the height of an upright pole set in the ground uses pole reinforcers which are driven in the ground alongside and complemental to the pole. Extensible power devices mounted on ground-engaging supports use gripping heads mounted adjacent the upper end of the device, in such manner that actuation of the devices holds the heads in biting engagement with the pole. As the devices are extended, the heads pull the pole from the ground and through the predetermined channel formed by the pole reinforcers. Once the pole is extended to the desired elevation, the pole reinforcers are permanently secured to the pole to provide stability at the new height. The present invention is useful in moving the pole through extended displacements in a single stroke of the hydraulic cylinders of the devices, obviating the necessity for successive attachment and detachment of the apparatus during raising of the pole.

Abstract: Opposing steel door skins are punched to provide openings of the required size for a specified lite unit. Lite unit locator and retaining flanges are simultaneously formed on the two skins. A prefabricated lite assembly consisting of a pane of glass and surrounding mitered wood frame with sealant is placed between two steel skins in interlocking engagement with the locator and retaining flanges and the door is put through a foaming operation to produce an interior foam core around the margins of the lite assembly or unit.

Abstract: A composite building panel is disclosed. This building panel is comprised of at least one metal reinforcing member; a layer comprised of glass fiber, said layer being fastened to said metal reinforcing member(s); and a three-dimensional, cross-linked polyester resin layer which abuts said glass fiber layer.

Abstract: A method and apparatus for forming hay bales or the like which are treated as they are formed with an additive substance for sealing, adding nutrients or preventing spoilage of such hay or other forage crop. Spraying apparatus is attached to a hay baling machine in a preferred embodiment of the invention for spraying such a substance on a bale of hay as it is being formed.

Abstract: Am improved harvester is provided for hydroponically grown produce borne in spaced cups extending down through a flexible elongated strip along the length thereof. The harvester comprises a frame having at least one and preferably a number of guideways each having a pair of elongated spaced parallel rails secured in the frame and adapted to guide the flexible strip bearing the produce-containing cups. A strip guide roll and separation means are also secured to the frame for separating the produce-bearing portions of the growing cups from the flexible strip during its passage through the frame. A strip take-up reel and means for powering the same are in or adjacent to the frame. In one embodiment, the guide roll is adapted to fully eject the cups from the strip and slide means are provided for passage of said cups to a recovery area. In another embodiment, the guide roll raises the cups while the cups are still retained in the strip and blade means sever the raised portions of the cups.

Abstract: Control system (2) for an outdoor power equipment unit includes a pivotal control member (10) having a pivotal traction drive link (20) for actuating a traction drive of the unit and a pivotal clutch link (22) for actuating an active element of the unit. A latch (40) rotatively couples the clutch link (22) to control member (10) only when control member (10) has first been moved from a neutral position to a cocked position. Rotation of control member (10) from the cocked position towards the fully engaged position then rotates the clutch link (22) to actuate the clutch. The traction drive link (20) can be operated either alone or in combination with the clutch link (22). Any rotation of control member (10) from its neutral position towards its fully engaged position will rotatively couple the traction drive link (20) thereto to actuate the traction drive.

Abstract: A cotton harvester is provided with a hydraulic system incorporating a multiple segment rotary flow divider interposed between a source of fluid pressure and a plurality of header unit lift cylinders. A variable orifice valve assembly is arranged parallel to the header unit lift cylinders and is responsive to undulations in the ground plane for raising and lowering individual header units.

Abstract: A universal spreader comprising a hopper; a cable by which the speading of fertilizer/chemical/seed/pesticide/etc., in the hopper may be inititated or terminated; a rotatable, driven agitator which distributes and controls the amount of the fertilizer; an adjustable width drive for the agitator; a series of moveable fertilizer delivery tubes or "fingers" for delivering the fertiziler from the hopper to the ground which allows spreader to be fit on lawnmowers of most sizes with handles of different and varied configurations; and a guide securing device which also assists in spreading the fertilizer from the "fingers" while also serving to provide a base for anchoring and adjusting the width of the "fingers" to coincide with the swath of the lawn cut by the blades of the mower.

Abstract: A row crop harvester provided with pairs of coacting power-driven endless belts having a feed path therebetween for stalk-type crop material to be fed by said belts to the harvester from the cutting mechanism thereon, the belts having lug members on the outer surfaces to effect positive engagement with crop material and move it along said feed path, and positive drive for said belts being provided in the form of spaced lugs on the inner surfaces of said belts which are received in complementary openings in rotary support and drive members, the improvement comprising self-clearing members supported adjacent the rotary members and having lugs projectable into the aforementioned openings to clear the same of any extraneous material therein.

Abstract: An agricultural machine for picking up and chopping crop, particularly green crop such as grass to be made into silage, and comprising a picking up device for collecting crop from ground over which the machine is travelling and at least one chamber to which the crop is delivered from said picking up device through a lateral opening and the chamber containing a reciprocable ram movable towards and away from stationary knives in an open end of the chamber, the ram preferably having knives on its face presented towards the stationary knives, the movement of the ram towards the stationary knives causing the knives to co-operate to chop up the crop, the cut crop being discharged from the open end of the chamber into a collector cage.

Abstract: A combine having a header on the forward end of it which operates to cut and deliver crop material to an elevator in a feeder house over which a cab is provided at an elevated location. The elevator delivers the material to the threshing mechanism of the combine. The engine of the combine is connected by a belt drive to a vari-drive supported by the feeder house and a yoke on the vari-drive moves one flange of the adjustable sheave of the vari-drive relative to the other. An auxiliary motor actuates the yoke by driving a rotatable screw and a Bowden cable is connected between a pivoted speed-indicating needle on a dial mounted in view of the cab and the follower of the yoke which is actuated by the screw which is operated to move the yoke to change the adjustable sheave and vary the speed of operation of the combine.

Abstract: In apparatus for making a yarn, two closely juxtaposed suction drums are rotated in the same sense and have suction zones which define a generally triangular space. A drawframe supplies a roving to one end of said triangular space. Withdrawing means are provided for withdrawing a yarn formed from said roving from the other end of said triangular space. Means are provided for supplying covering fibers to a predetermined length zone of said triangular space in a direction which is transverse to the axes of said drums so that said covering fibers cover said roving. To improve the twisting of the roving, means for twisting the roving are provided between the drawframe and said predetermined length zone of said triangular space.

Abstract: Method and apparatus for joining a thread returned by a traveling joining device from a take-up coil to a spinner rotor of an open-end rotor spinning machine station, including a thread joining device being disposed on the joining device and being shiftable into reverse motion for returning the thread to the spinner rotor, a thread pulling device disposed on the joining device, a thread support disposed on the spinning station, a device for transferring thread after joining from the thread pulling device to the thread support, and a thread accumulator insertable into the path of the thread between the thread pulling device and the take-up coil.

Abstract: A dual fuel injector for a gas turbine engine having means for water injection to reduce NOx emissions, comprises an outer annular gas fuel duct with a venturi section with air purge holes to prevent liquid fuel entering the gas duct, an inner annular liquid fuel duct having inlets for water and liquid fuel and through which compressor air flows, the inner annular duct terminating in a nozzle, and a central flow passage through which compressor air also flows, terminating in a main diffuser having an inner secondary diffuser. The surfaces of both diffusers are arranged so that their surfaces are washed by the compressor air to reduce or prevent the acretion of carbon to the injector, the diffusers in effect forming a hollow pintle.

Abstract: A ducted fan propulsion plant has a reversible-pitch fan driven by a core gas turbine engine and housed in a duct which terminates at its downstream end in an outlet nozzle defined between two semi-cylindrical shells. The shells are mounted for movement hydraulically both axially and angularly to define an increased effective nozzle area for take-off. Upon further rearward axial displacement the shells adopt a reverse-thrust position to define air inlets to the fan when the fan blade pitch is reversed.

Abstract: An improvement is disclosed in a hydraulic system (10) having a variable displacement pump (12) and being capable of delivering pressurized fluid from the pump (12) to selectively engage at least three work circuits (18) with a first (20) of the circuits (18) being normally operable up to a first pressure and a second (22) of the circuits (18) being normally operable up to a second and lower pressure. The improvement comprises circuitry (80, 92, 94, 98, 108, 120, 122, 124, 126) for selectively operating a third (24) of the circuits (18) at one of the first or second pressures or at an upstaged pressure which exceeds the first pressure and circuitry (128) for reducing the displacement of the pump (12) in response to the third circuit (24) being operated at the upstaged pressure. Such upstaged pressure is available in a controlled manner for working against particularly heavy loads. Thus, a third and higher operating level is added to a system which already operates at at least two pressure levels.

Abstract: A hot-gas engine the power output of which is regulatable comprises a cylinder defining variable-volume primary and secondary chambers separated by a piston moving in the cylinder, the movement of which piston is transmitted to an external system extracting the mechanical work produced by the engine. The engine has a heater communicating with the primary chamber, a regenerator communicating with the heater and a cooler containing a supply of working gas at the maximum gas pressure occurring during the work cycle. The engine is provided with valves controlled to pass the working gas to, from and between the primary and secondary chambers in sequential steps.

Abstract: The temperature of the working gas in the heating chamber of each of a number of cylinders is continuously measured. An electronic selection circuit selects the lowest measured temperature as a control parameter by which the speed of a blower in the common air supply is controlled for providing an air flow proportional to blower speed. A pressure-detecting device measures the air flow through a pressure converter provides an electrical signal that normally controls the valves of the respective fuel supplies for the combustion chambers of the cylinders, but a monitoring device for each cylinder compares the measured working gas temperature with a pre-set maximum value so that when the maximum value is exceeded, the fuel supply valve is changed over to control by the output of the monitoring device, to reduce the fuel supply until the maximum temperature is no longer exceeded in that cylinder.

Abstract: A solar energy device comprising a body having a plurality of spaced focusing lenses to concentrate direct and reflected rays from the sun. A heat receiving member is inside of the body. One of the body and the member is expansible and contractible so that there is a relative movement between the surface of member and the focal points of the lenses, the member surface thereby being alternately in and out of coincidence with the lens focal points. The member is supported within the body and fed fluid to be heated. The heated fluid is then removed from the member. The heat receiving member or body that is expansible and contractible may be used as a prime mover.

Abstract: A gas powered motor has a reservoir for liquefied gas, a supply passage from the reservoir leading through one side of a heat exchanger to the motor and a container holding a buffer substance in heat conductive relationship with the reservoir. The buffer substance acts to supply heat to the liquefied gas while undergoing a chemical, physical crystallographic or other change of state to assist in maintaining the supply of gas to the motor from the reservoir. The motor exhaust leads to a vessel containing a condensing buffer substance which absorbs, persorbs or otherwise associates with the gas accompanied by a release of heat. The condensing buffer substance is in heat conductive relation with the other side of the heat exchanger in the gas supply to the motor to superheat the gas supplied.

Abstract: A spill condition venting system for a double containment tank includes a control system for controlling, in the event of a spill or an overflow of fluid into the annulus of such double containment tank, the flow of stored fluid into and out of the annulus and for controlling vapor resulting from such spill.

Abstract: An absorption type air conditioning system in which a solar collector is used integrally to heat and strip refrigerant from the mixture of absorbent and refrigerant to eliminate a separated hot water or other heat transfer medium cycle as normally employed between the solar collector and the stripper generator.Also, the present invention includes an absorber which is integrally located within the confines of a deep water well used to extract heat from the entire system, together with a condenser coil or tube also located within the deep water well. The integral location of absorber and condenser within the confines of the heat sinking medium, such as a deep water well raises the overall cooling efficiency since a separated cooling cycle and heat exchanger are eliminated.The invention is particularly suited to brine type absorption systems, such as lithium bromide and water solutions where stripper generator action may take place at temperatures easily obtainable with the solar collector process included.

Abstract: A fail-safe electronically controlled defrost system is provided for use in a frost-free refrigerator suitable for home use. The defrost cycle, in the interests of power conservation, is made subject to plural input electronic control in a circuit in which the intrinsic reliability of the defrost system is specifically designed to revert to a non-power conservation mode in the event of failure of the electronics. Compressor time, door openings and user (vacation mode) settings are typical inputs for control of the period between defrosts.

Abstract: A refrigerator includes a compressor, an evaporator fan, a condensor fan and a defrost heater which are controlled by a defrost control system. The control senses the number and duration of freezer and fresh food compartment openings, the duration of the previous defrost operation, and the total accumulated compressor run time since the previous defrosting operation. A stored count is decremented by weighting functions which are adaptably varied in accordance with the number and duration of compartment door openings and the duration of the previous defrosting operation. When the stored count is decremented to zero, the defrosting operation may be initiated, unless inhibited. The defrosting operation is inhibited if the total accumulated compressor run time is less than a predetermined amount. The control is reset to a point just short of a defrosting operation if a power outage occurs.

Abstract: A hot gas pressure switch 29 is provided to be responsive to pressure in a hot gas line 22 which will have a significant pressure value only during a heat or defrost mode, to unload cylinders of a transport refrigeration compressor to avoid overload, so that the compressor can operate with a substantially greater discharge pressure in a cooling mode without penalty.