Abstract: A cyclic-action buoyant toy has no moving parts. The toy floats in water in a first, horizontal position with a port below water level to admit water into a cavity within the toy, while a siphon connected to a drain operates whenever the toy has admitted enough water to assume a second, angled position. The siphon removes water at a faster rate than the port admits water, restoring the toy to the first position, stopping the siphon, and restarting the cyclic action. One embodiment uses a single-ended siphon, while a faster-acting embodiment uses a dual-ended siphon.

Abstract: A self watering apparatus for home growing bean sprouts includes a housing divided into an upper compartment and a lower compartment by a horizontally positioned divider plate provided with orifices. An open top sprout container tray is placed within the lower compartment of the housing, the bottom of the sprout containing tray is provided with a drainage opening. A tilting water container is pivotally mounted in the upper compartment of the housing, the tilting water container has an established capacity and collects water from a water supply line at a controlled rate. Each time the volume of water collected in the tilting water container reaches the established capacity, the tilting water container discharges the collected water on the divider plate and drains through the orifices into the open top sprout container tray.

Abstract: Open-topped container for cultivating one or more plants individually contained in a corresponding number of cavities of said container, containing a natural or artificial cultivating medium for said plant(s), e.g. soil, and being adapted for easy transplantation of such plants by said base comprising a peripheral line of weakness adapted for an application of pressure against the base cause the base to break loose from the remainder of the container. The line of weakness having an average breaking strength of between 10 and 40% of the average breaking strength of the base is preferably formed wholly or in part by elongate drainage holes passing through the base and so dimensioned that cultivating medium is retained. For transplantation the base is pushed upwards with the cultivating medium and plant.

Abstract: The system for injecting a systemic treatment liquid into trees and similar plants includes a plurality of substantially identical injector nozzles, each of which is insertable into one of a plurality of circumferentially spaced injector holes in the tree, a plurality of substantially identical sealed containers containing the treatment liquid in a predetermined quantity suitable for a single treatment through one of the injector holes and having a discharge conduit which is closed by a frangible member, a flexible strap or belt adapted to be wrapped around the tree at a location above the injector holes, a plurality of substantially identical connecting hose assemblies, each having one end adapted for connection to an injector nozzle and a connector at the other end which is insertable into the container discharge conduit and has a pointed outer tip for puncturing the container membrane, and valve means carried by each of the hose assemblies for selectively opening and closing the flow passage therethrough.

Abstract: A window construction comprising a master frame and a pair of glazed window sashes which are double-hung in the window frame for normal operation and are provided with means to permit inward tilting of the sashes for cleaning and servicing of the same as may be required. The master window frame and both of the sashes mounted therein are each formed of an assembly of sections having the same hollow cross-sectional shape throughout the lengths thereof to provide not only the master frame but also each sash with a perimetrally continuous plenum of confined air which effectively serves as a thermal insulating barrier. Each of the window sashes is fitted on its opposite side edges with hollow thermal insulating spring-pressed weatherstripping members which respectively resiliently engage and made weather-tight contact with vertically extending runways provided therefor in the opposite side rail members of the master frame.

Abstract: The present invention provides an apparatus for treating the top ends of flexible cords or filaments. It comprises holding means for holding articles having flexible cords, delivery means for delivering said holding means in a predetermined direction, cylindrical grinding means disposed at a position adjacent to a delivery passage for delivering said holding means, and means for rotating said cylindrical grinding means around its own axis and around an axis at right angles to its own axis. By virtue of the feature that the cylindrical grinding means is rotated around its central axis and around the axis rectangularly crossing the central axis, the top ends of flexible cords, such as bristles of toothbrushes, can be polished and ground from all the directions and very smooth and round outer ends can be obtained at high efficiency and high rate.

Abstract: The present machine tool comprises a grinding wheel rotatably mounted on a machine bed. A feed advance is movably mounted on the bed, and carries a vertical frame. Head and tail stocks are mounted in the vertical arms of the frame, for supporting a work piece to be moved with the feed advance table into engagement with the grinding wheel. The frame is angularly displaceable on the feed advance table about a vertical axis, to enable variation of the direction of feed with respect to the axis of a work piece mounted between the head and tail stocks.

Abstract: Overrunning protection for a grinding machine comprising a grinding wheel mounted in a head stock. The head stock is supported on a frame for movement in a direction toward and away from a work rest for a work piece at one end of the frame and a drive for rotating the grinding wheel. The drive is operable to rotate the grinding wheel at a first angular velocity and a second lower angular velocity. The overrunning protection consists of a blocking member operable between a first position permitting engagement of the drive to rotate the grinding wheel at the first angular velocity and a second position permitting engagement of the drive to rotate the grinding wheel at the lower angular velocity. A first sensor senses the position of the blocking member and a second sensor senses the position of the head stock in relation to the grinding position of the work piece at the work rest.

Abstract: An improved method for resharpening cutting blades for gear cutting machines provides for accurate positioning of the cutting blades relative to a single grinding plane of a grinding wheel. The method includes steps of positioning the cutting blades in a certain relationship to a reference axis so that the reference axis can be used for establishing critical geometric relationships for the resharpened surfaces of the cutting blades.

Abstract: The invention relates to a honing tool which comprises an elongate housing and a thrust body displaceable longitudinally in the housing, the thrust body comprising a thrust plate and the thrust plate having opposed inclined edge surfaces which form slideways. The slideways engage with corresponding inclined surfaces on thrust members which are movable transversely to the longitudinal axis of the thrust body, the thrust members being connected to arcuate shells mounted around the housing for movement radially outwardly therefrom against a spring bias in response to longitudinal movement of the thrust body. The arcuate shells mounted in use cutting devices and the thrust members are arranged in pairs, the or each pair comprising a cylinder and a piston slidable therein. The inner ends of the cylinders and pistons are each slotted and receive therethrough the thrust plate.

Abstract: A structure of generally dome shape including a supporting framework formed of circumferentially spaced vertical members and laterally extending members on each side thereof and means for clamping said laterally extending members to a vertical member. The laterally extending members being spaced apart substantially the same distance as the diameter of the vertical member to which they are clamped. An inside shell formed in any suitable manner of concrete, mesh and reinforcing members and an outside shell spaced from said inside shell and formed generally similarly to the inside shell, the inside and outside shells being connected to and supported by the spaced laterally extending members and fixed thereto providing an airspace between the inside and outside shells. A modification of the structure provides a solar heating arrangement on a part of the dome shaped structure which has a generally southern exposure.

Abstract: A modular type building panel for either vertical or horizontal positioning is provided having a hinge element incorporated to facilitate assembly of the panels. The building panels are of a double walled construction having tongue and socket edge configurations adapted to mechanically interlock when placed in assembled relationship with an adjacent panel. The hinge elements comprise a hinge socket and a hinge pin formed with the respective tongue edge portion and the socket edge portion. The hinge socket is disposed adjacent the upper end of the panel as is the hinge pin which permits interfitting of the two elements during the initial stage of panel assembly thereby providing a support pivot facilitating swinging of two panels into assembled relationship. In one embodiment the hinge socket opens at the longitudinal end of the panel for panels designed for vertical walls.

Abstract: A topographic bench mark unit comprises a case which defines internally a space accessible through a movable lid. The case is mounted on a support. A bench mark member is integral with the case within the space. Provision is made for mounting a topographic member in a predetermined position in relation to the bench mark point, with a view to producing measurements referring to this point, and means for identifying the bench mark point. The unit has application both to immovable altimetric and geodetic bench marks.

Abstract: In one preferred embodiment a two-part bracket assembly is provided for securing a downwardly sloping stringer to the upper of two building levels. Preferably, each part of the bracket is formed from a sheet of metal. One part of the bracket comprises a vertical flange which abuts against and is secured to the frame of the upper building level. A side panel of the bracket part lies in the vertical plane perpendicular to the plane of the flange and abuts against the side of the stringer. A flat support flange extends perpendicularly away from the lower edge of the side panel and extends underneath and abuts against the lower surface of the stringer. The plane of the support flange is angled downwardly relative to the vertical flange so that with the lower surface of the stringer abutting against the support flange, the stringer slopes downwardly from the upper building level.

Abstract: A glazing unit comprising a sheet of glass having a coating consisting essentially of silicon on a major face thereof, and a frame for that sheet.

Abstract: A one-story building having a polygonal floor with a centrally located mast, has exterior walls tilted up from horizontal by means of tackle mounted to the mast. The walls are of a cast cementitious material with embedded rectangular grid of bamboo tubes. Continuous strings of barbed wire extend lengthwise inside the horizontal tubes of the grid around the entire perimeter of the building from one jamb to the other of a doorway in one of the exterior walls to bind walls together. Selected ones of the horizontal and vertical tubes used for electrical and plumbing conduits. Tubes are filled with concrete after erection of the walls. The mast and tackle thereon are used to erect a multipanel roof to position where it is supported on the mast and walls.

Abstract: A metallic beam, reinforced and prestressed by a cable means, to form a composite structure, the cable means extending longitudinal, along the beam's tensioned part, continuously, to both sides of the beam's section of maximum positive design moment, or its section of maximum negative design moment, or both.A metallic rigid frame, reinforced and prestressed by a cable means, to form a composite structure, the cable means extending longitudinal, along the frame's knee and, continuously, to both sides of it, along the tensioned part of the frame.In all cases, the forces of the cable means are transferred to the beam or frame by at least three anchor means, attached to the beam or frame, respectively, and gripping the cable means.At least one interior anchor means is either in the form of a sleeve, swaged to the cable means, or a cable clamp; or a sleeve into which wedges have been driven; or a socket filled with a solidified material, such as zinc.

Abstract: A self-supporting girder structure which comprises a plurality of sections of rigid material having a triangular cross section while means are provided for preventing the sections from a mutual lateral displacement, means being provided which extend through holes in all of the sections in the longitudinal direction of the structure for holding the sections together.

Abstract: A fire-resistant seal for application to a structure e.g. a door jamb, comprises a holder of substantially tubular form for securing to the structure, and a fire-barrier material, which swells under fire conditions, retained in the holder interior. To minimize dislodgment of the material by accident or tampering, the holder has a series of small external openings distributed therealong which communicate with its interior. The total flow area of the openings at the outer surface of the holder is less than the total imperforate area of the outer surface. The holder may be a hollow strip, and the openings confined to margins which extend along one face of the strip adjacent to opposite edges of the face, or the openings may be formed on opposite faces of the strip.

Abstract: A joint between first and second adjacent panel members, including first and second cooperatively bent members on the adjoining edges of the first and second panel members, respectively. The bent members are coupled to define an open ended, vertically extending cavity, having a substantially rectangular configuration in horizontal section. An expandable locking device is inserted into the cavity, which device applies pressure to opposite corners of the cavity substantially along the entire length thereof, to provide and maintain a tight joint between the panel members.

Abstract: Concrete forming structures are provided particularly for use as horizontal floor forms or vertical wall forms. All such forms have a plurality of beam members placed across and secured to additional structural members such as trusses or stiffeners. Each beam is usually formed of extruded aluminum, and has an upper portion which has an open section in which an independent beam stiffening joist member may be secured. Sheeting, such as plywood panels which are usually used for concrete forming, may be nailed or screwed to a concrete forming structure at the independent beam stiffening joist members, which are usually wood. The deflection resistance of a beam having a wooden beam stiffening joist member secured in its upper portion is improved over that of a standard I-beam having an equal cross-sectional area of the same metal.

Abstract: A roof, that is constituted by a number of contiguous three-dimensional roof pans, has fascia-supporting clips adjacent one side thereof; and has a fascia releasably held by those clips. That fascia also extends along the ends of that roof. The opposite side of the roof is supported by a flashing-like bracket; and that bracket has a shelf-like bottom which extends under, and which is secured to, the roof pans to enable the weight of that opposite side to tend to draw that bracket into intimate engagement with that opposite side. The one side of the roof is underlain and supported by an elongated channel which, in turn, is supported by vertically-directed posts. The upper ends of those posts extend upwardly through openings in a horizontally-directed lower portion of that channel and are co-extensive with, and are directly secured to, the vertically-directed portion of that channel.

Abstract: A building unit is made up of a generally straight elongated portion and a pair of generally straight, substantially parallel, spaced-apart legs extending in the same direction therefrom. Units may be used in various combinations, in particular to form a building frame structure having two generally U-shaped portions with limbs thereof connected by connecting members, in the shape of "Demi-Cubic" frame.

Abstract: Method and apparatus for continuously and automatically packaging preferably particulate food in successive fixed amounts by using a ribbon-like film, preferably of a synthetic resin. The film is continuously payed out from a roll and is progressively wrapped around a cylindrical forming chute with the help of a plate, while longitudinally heat sealing the overlap of the opposite lateral edges of the wrapped film, to change it into a tubular form, charging the food thereinto from above the chute, heat sealing the top and bottom of a food receiving region of the tubular film, and cutting off that region from the continuous tubular film. The apparatus allows the continuous production of bags or enclosures, from the initial ribbon-like and later tubular film, charged with the food, in a simple cyclical operation.

Abstract: A machine for packing flat articles in a case which includes a case elevator on which a case is supported with an open side of the case sloping and exposed. Flat articles are directed into the case transversely of the open side to form a stack inside the case. A tongue engages the stack as the stack increases in size. The tongue controls means for lowering the case as the articles are projected into the case so that the level of the upper end of the stack remains substantially constant. The tongue is withdrawn when the stack has reached a predetermined size. A hold down and pusher member is advanced into engagement with an upper portion of the stack when the stack has reached the predetermined size to hold the articles of the stack in the case as the tongue is being withdrawn. The case is transferred to a tipover frame which swings the case upwardly against a flap folding belt. As the case is transferred, flaps are closed.

Abstract: In the hinged-lid type cigarette packets, the upper flap protruding from the front wide side of the inner wrapper should, for convenience in the use, be folded over the upper flap protruding from the rear wide side of the same inner wrapper. In some of the conventional soft type packeting machines the folding disposition of the upper flaps is exactly opposite to the one above described, and the present invention provides for a device which allows the use, in a hinged-lid type packeting machine, of a rotating wrapping head normally used in the soft type packeting machine, since said device reverses the folding disposition of the upper flaps.

Abstract: In a process and apparatus for forming a multi-layer protective envelope around an object that is generally prismatic or cylindric in shape the object while being rotated about a stationary, horizontal axis is wrapped-around with a web of thin, heat-shrinkable and heat-softenable plastic film having a width that exceeds the length of the object, successive portions of said web after having arrived at the periphery of the object and as the object rotates being exposed to a heating radiation while passing a zone extending along the full length of the object and also inwardly over portions of the end surfaces thereof. Layer after layer of said film will thereby shrink to tightly surround the object, including at least the radially outer marginal portions of the ends thereof, and also laminate together into a tough unitary casing.

Abstract: Apparatus for wrapping articles in heat sealed thermoplastic stretchable film consists of a first conveyor for carrying an article forward while progressively enclosing it with film drawn from a film supply, joining the margins of the film together to enclose the article in an elongated tube of film, cutting the film so as to provide equal amounts of excess film at each end of the article, using a vacuum inlet to pull the trailing portion of film to one side of the article so that a transverse rod, moving faster than the article, can fold the trailing portion against one side of the article, folding the leading portion of film against the same side by means of a roller, and finally moving the article into contact with a heated belt to seal the film.

Abstract: A pair of arms are pivotably affixed at their upper ends to a shaft secured to brackets depending from the underside of a combine header or other agricultural machinery, the arms being disposed at an angle of about 45.degree. with the ground. A roller is secured across the lower ends of the arms, the roller having a width slightly greater than the width of the row of the crop to be harvested. The entire assembly is connected to a plate which may be welded or otherwise secured to the machine ahead of the tires. A compression spring is affixed at its upper end to the plate and at its lower end to a cross-piece secured across the arms at about their midpoint, the spring urging the roller against the ground so that the stubble will be forced substantially flat against the ground as the large tires of the combine pass over it. The considerable damage to such tires which otherwise occurs from stubble wearing the tread is eliminated or reduced.

Abstract: A haymaking machine for the tedding and windrowing of fodder, comprises a pair of rake wheels driven in rotation on which working tool carrier arms extend outwardly and are mounted for pivoting in support bearings articulatedly connected to a drive hub. Each of these arms has at its end adjacent the axis of rotation of the corresponding rake wheel, a control crank having a roller thereon. The roller rolls on one of two guide tracks. The inner guide track is for windrowing and the outer guide track is for tedding. The arms occupy a relatively raised position and the axes of rotation of the wheels are tipped forward during tedding; while the arms occupy a relatively lowered position and the axes of rotation of the wheels are substantially upright during windrowing.

Abstract: A false twisting apparatus comprising two endless belts crossing each other and running in opposite directions at the crossing point is disclosed, in which a yarn running through the crossing point is nipped by both the belts at the crossing point and is false-twisted by a frictional effect caused between the two belts. In this false twisting apparatus, the angle of crossing of the two endless belt is set in advance, and the apparatus may include means for detecting minute variations of this predetermined crossing angle and correcting such minute variations.

Abstract: An apparatus for setting and maintaining the nip pressure at a predetermined level in a false twister where two belts running in opposite directions are crossed in such a state that the surfaces of both the belts are contacted with each other and a yarn is nipped at this crossing point by the two belts to impart false twists to the yarn is disclosed. This nip pressure setting apparatus includes a device for compensating variations of the nip pressure where according to decrease of the nip pressure, at least one of pulleys supporting the belts is moved in a direction approaching to the opposite belt so as to increase the nip pressure and maintain it at a predetermined level.

Abstract: A method of making slub or thick and thin yarns with twist variation on open end spinning machines by changing the speed of the yarn as it exits from the rotor of the open end spinning machine. The method produces a unique slub yarn which has a portion of high twist adjacent the slub in the yarn which has lower yarn twist.

Abstract: Method and apparatus to produce slub or thick and thin yarns with twist variation on open end spinning machines by changing the speed of the yarn as it exits from the rotor of the open end spinning machine. The speed of the yarn is varied by a pivotally mounted lever member which varies the length of the yarn from the exit of the rotor to the yarn delivery rolls.

Abstract: A safety device for battery-operated watches including an indicator device and an accumulator connected in parallel with the battery supplying the electronic circuit of the watch. The battery charges up the accumulator during normal use and when the battery runs down the indicator device gives a visual indication of battery condition and the accumulator continues to provide current to the electronic circuit of the watch for a time to enable the battery to be replaced.

Abstract: A timepiece circuit device including an upper frame, a lower frame and a print base board having a conductive pattern for mounting and electrically connecting a semiconductor device. At least one of said upper and lower frames is provided with a connecting portion electrically connecting electronic parts and a recess in which said electronic part is fitted and said semiconductor device is received. Said upper frame, said circuit base board and said lower frame are overlapped with each other thereby providing a circuit device having semiconductor devices capable of being miniaturized for a timepiece.

Abstract: An alarm device comprises a wrist watch which includes timing and alarm setting elements with a separate alarm box containing a sensor and sonic generator alarm. When the alarm feature is to be used, the watch is mounted in the alarm box and at the time of alarm, the wristwatch provides electrically generated alarm coupling signals which are detected by the remote sensor to activate the sonic generator alarm. The electrically generated coupling signals may be RF, magnetic or optical. Since the sonic generator and associated power supply of the alarm are mounted in the alarm box, rather than in the watch, the alarm watch may be styled to provide an aesthetically attractive watch which is thin and of suitably small dimensions.

Abstract: An assembly is provided for detachably supporting an opener roll and supporting opener roll shaft at an open end spinning unit. The assembly includes a housing defining a cylindrical receptacle, a bearing sleeve attached to the opener roll shaft to be movable therewith as a unit, and being selectively lockable in the receptacle. To accommodate locking of the bearing sleeve in the cylindrical receptacle, a pressure piece which is movable radially into a recess in the receptacle to engage against the bearing sleeve is provided, along with an adjustable locking mechanism connected to the pressure piece for accommodating movement thereof between the respective locking and unlocking positions. In preferred embodiments, the locking mechanism includes a lever portion in the area adjacent the opener roll, which area is exposed when the opener roll is exposed, so that the locking mechanism can be easily released and the opener roll can be then easily removed along with the bearing sleeve from the receptacle.

Abstract: A clock has a clock face in the form of an axially symmetric solid, e.g. a sphere, a cone or a cylinder. Clock hands extend around the clock face following a helical path, and time-indicating markings are arranged on all the surfaces of the face. It is therefore possible for a complete set of these markings to be seen from any direction relative to the clock face. The hands are normally driven by a conventional clock movement, there being an hour hand and a minute hand. However, it would be possible in some applications to have only a single hand, e.g. a minute hand, and to drive the clock face relative to the hand. The markings are arranged along helical paths, corresponding to the helical shape of the hands.

Abstract: The invention relates to an eyed hook having a shackle engaged in its eye. The eye has a flattened neck to allow the shackle to be engaged, while the shackle has a slot bridged over by a securing bolt, the width of the slot being greater than the width of the material of the hook constituting the neck, but less than the width of the remainder of the material of the hook constituting the eye. The neck is located where the eye merges into the hook, the neck having a transverse bore to take a locking device which also acts as a bearing for a pivoted safety catch of conventional type.

Abstract: Disclosed is a gas turbine engine provided with an annular combustion chamber. The annular combustion chamber has, on an upstream side thereof, a first and a second row of angularly spaced injection nozzles adapted for introducing air into the combustion chamber. Fuel nozzles are opened to the corresponding injection nozzles in order to introduce vaporized fuel into the injection nozzles to form a combustible mixture therein, which mixture is ejected into the combustion chamber. Each adjacent two injection nozzles of the first and second rows are so arranged that a violent contact of the flow of combustible mixture from the adjacent two nozzles occurs in the combustion chamber.

Abstract: Disclosed is an internal combustion engine comprising a catalytic converter containing a three way catalyzer therein. A secondary air feed control device, an air-fuel ratio detector and the catalytic converter are arranged in this order in the exhaust passage of the engine. An exhaust gas mixing device is disposed in the exhaust passage between the air-fuel ratio detector and the catalytic converter so as to make a total air-fuel ratio in the inlet of the catalytic converter equal to the stoichiometric air-fuel ratio at all times.

Abstract: The invention relates to a power steering system of the metering type. Units of this type most commonly utilize gerotor type gear sets for the metering operation. During emergency operation when pressurized operating fluid is not available from a pump, steering is accomplished by operating the metering motor with the steering wheel which provides a pumping function for manually creating pressurized fluid. A problem with this type of unit is that a substantial amount of manual exertion is required to steer the vehicle under these conditions. Control units of this type have a universal drive between the rotatable valve thereof and the inner gerotor gear which has a combination rotating and orbiting movement. In this invention the universal drive has two main sections with a lost motion emergency device between the opposite ends.

Abstract: An improvement in patient lifting devices comprising an upright member, a boom pivotably mounted on the upright member, a fluid cylinder pivotably mounted between the upright member and the boom, and a manually operated pump for the fluid cylinder. The improvement comprises means actuated by the pump handle for transferring fluid from the fluid cylinder to a fluid reservoir, thereby permitting the boom to lower under the combined weight of the boom itself and anyone being carried by the boom.

Abstract: A rotary power element has a compressed-gas generator having a liquid for actuation of a rotary drive element. The liquid for actuation of the drive element is sealed within a pipe by bursting elements. In a preferred embodiment the pipe is curved into a coil surrounded by an external supporting sleeve.

Abstract: A method for producing mechanical energy from geothermal fluids in which a heat transfer fluid (HTF) is heated by direct contact with the hot geothermal fluids, thereby partially cooling the geothermal fluids. A working fluid is heated by direct contact with the partially cooled geothermal fluid and is heated further by indirect heat exchange with the hot HTF. The heated working fluid is utilized in a heat engine for the production of mechanical energy.

Abstract: A solar powered engine and tracking system comprises a piston working within a cylinder for turning a drive shaft for driving an electrical generator or performing other useful work, a solar concentrator comprising a plurality of mirrors, each reflecting Sun light on a common focal point on the end of the cylinder for heating a flash boiler located thereon, preheated water from a source is injected into the flash boiler by a pump powered by the drive shaft timed according to piston movement after operating the piston, the steam is then vented from the boiler by valve means operated from the drive shaft. A starter motor is provided to initially start the engine operating by rotating the drive shaft until the piston movement is self sustaining. The entire device is enclosed in a solar energy collector panel for elevating the temperature of the system so as to maintain the water at a sufficient temperature with a minimum of external heating.

Abstract: A vapor compression refrigeration system which has a compressor, a condenser, a flash economizer and an evaporator to form a primary refrigerant loop and a second compressor and an economizer-condenser which partially form a secondary refrigerant loop. Gaseous refrigerant from the flash economizer is recompressed in the second compressor and thereafter recondensed by the economizer-condenser. The recondensed refrigerant is then flashed in the flash economizer further cooling the liquid refrigerant therein.

Abstract: An improved refrigeration system for chilling a circulating water supply for reuse in cooling industrial equipment. The system includes a water container having therein a coiled refrigerant tube and a coiled water tube. The coiled refrigerant tube has a plurality of turns normally positioned below the level of water in the container with the coiled water tube being generally positioned within the coiled refrigerant tube in coaxial relationship. Water inlet means is provided adjacent one end of the coiled water tube through which water from the industrial equipment may flow into the water tube and water outlet means is provided adjacent the other end of the coiled water tube from which water from the water tube may flow into the container.

Abstract: An air conditioning unit for heating or cooling the cab of a tractor or other vehicle. A rectangular housing is mounted to the roof of the cab. It includes front, back and side walls which are upright and spanned by a horizontal cover. A central transverse shaft is rotatably mounted within the housing and extends between the housing side walls. It rotatably carries blade assemblies for central blowers and side blowers. The housing is divided into front and rear compartments by a solid interior transverse partition which isolates the two sets of blowers. A compressor is mounted within the housing and also has a transverse shaft. A common hydraulic motor drives both the central transverse shaft and the drive shaft of the compressor. The front compartment includes an inside coil and air inlets for directing fresh air and return air through the inside coil. The rear compartment includes an outside coil. The two coils are interconnected with a compressor in the manner conventional to a heat pump system.