Abstract: Securement of flat heat exchange surfaces, particularly fins to tubular conduits of a heat exchanger. The heat exchange material is formed into upper and lower, or first and second pieces having longitudinal, partially circular recesses parallel to the length of a tube for engaging opposite sides of the tube. The radii of the recesses corresponds to the outer diameter of the tube. The recesses extend through less than 180.degree. so that the flat parts of the heat exchange surface are spaced leaving a gap prior to securement to the tubes. The two pieces are initially formed to interengage in such a way that they can be joined by lock seaming on opposite sides of the tube. Forces are applied to the interengaged pieces, forcing them together, stretching the heat exchange material at the recesses, thereby producing a tight interference fit between the heat exchange surfaces and the tube to provide minimum resistance to conduction of heat and at the same time securing the pieces together by lock seaming.

Abstract: The spacer grid is formed of metal strips which are bent to have alternating long angular sides and short flat sides. The strips are secured to each other at alternating flat sides to form a series of hexagonal spaces to receive the heat exchanger tubes. In addition, pairs of spring tabs are bent out of each of the angular sides in alternating manner to effect support of the tube in a space. The angular sides form an included angle of 135.degree. with the flat sides.

Abstract: A well tool for inclusion in a tubing string of a well adapted to perform multiple functions including controlling fluid flow through the tubing string and/or cutting coiled tubing or wire line used in the tubing string for performing well completion and workover functions.

Abstract: A process incorporating integrated units and combined cycle energy production is provided for the recovery and upgrading of oil containing deposits which are not readily amenable to recovery and upgrading, to produce therefrom a light oil and elemental sulphur. Residual hydrocarbons generated in the process are gasified to produce hot gases which are used as a source of energy for process use, including electric power. The electric power is utilized to electrolyze water and produce hydrogen for use in upgrading and oxygen for use in gasification. The integration of gasification of residual hydrocarbons to produce, inter alia, electric power with the electrolysis of water to produce hydrogen for upgrading, and efficient use, distribution and recovery of energy in combined energy cycles provides an economical and essentially energy sufficient process with the flexibility to be adapted for the recovery and upgrading of various low yield oil deposits.

Abstract: The conformance of an enhanced oil recovery process, including waterflood, surfactant or other chemicalized water flood process, in a formation containing at least two strata or zones of varying permeability, the permeability of one zone being at least 50 percent greater than the permeability of the other zone, is improved by flooding until the higher permeability zone has been depleted, after which an aqueous fluid is injected into the high permeability zone, said fluid having relatively low viscosity at the time of injection and containing a particular surface active agent which promotes the formation of a coarse emulsion in the flow channels of the formation which reduces the permeability of the high permeability zone. After the permeability of the first zone has been reduced substantially, flooding may then be accomplished in the second zone which was originally not invaded by the injected oil recovery fluid since its permeability was substantially less than the permeability of the first zone.

Abstract: This invention relates to novel leaching methods and apparatus for recovering minerals such as ores, high viscosity oil, and the like, from the subsurface earth formation. More specifically, the formation is penetrated by a plurality of mine shafts or large-diameter boreholes which are spaced apart as a function of the lithological characteristics of the formation. Thereafter, a suitable leaching fluid such as a liquid solvent, steam, free hydrogen, or carbon dioxide is injected into the formation through a plurality of drill holes radially extending from the lower portions of the shafts.In a particular technique for recovering high viscosity oil, the formation is initially subjected to a sequence of "soaking" cycles, wherein fluid is injected into the formation during separate discrete time periods, and wherein dissolved minerals or reduced viscosity oil is drained from the drill holes during the interval following each injection period.

Abstract: A method for sequential treatment of formation strats when treating fluid is pumped into a well at a matrix rate by temporarily closing perforations in the well casing. The perforations are closed by ball sealers injected into the wall during the treatment. The ball sealers are sized to plug the perforations and have a density less than the density of the treating fluid. The treating fluid is injected at a rate which transports the ball sealers to the perforations but which is sufficiently low to prevent formation fracture.

Abstract: The permeability of the prop pack in a subterranean fracture containing a propping agent is improved by contacting the propping agent with fluoboric acid. The fluoboric acid slowly forms hydrolysis products, including hydrofluoric acid and hydroxyfluoboric acid, which react with and stabilize clays and other fines in the prop pack, thereby improving its permeability. Because the fluoboric acid hydrolyzes slowly, it can be injected deep into the fracture extremities before significant spending of the acid occurs.

Abstract: A well safety valve for controlling the fluid flow through a well tubing in which the valve is biased closed. When fluid control pressure is supplied from the well surface, the valve is opened, but the valve closes when the control pressure exceeds a predetermined value. The tubular member controlling the actuation of the valve member includes a first upper and a second lower telescoping section with releasable locking means normally securing the telescoping sections together. A stop shoulder is positioned in the path of movement of the second section in the opening direction for actuating the release of the locking means when the control fluid force exceeds said predetermined value, and the second telescoping section is moved in a closing direction for closing the valve member when the locking means is released. The locking means may be either a shear pin or a resettable lock.

Abstract: A tractor draft load monitoring system responsive to tractor and associated implement load changes. The system is particularly adapted for a tractor having an engine/transmission power unit coupled to its drive shaft. The power unit is mounted on the frame by resilient mounts that permit measurable angular displacement of the power unit relative to the frame about the drive shaft axis in reaction to changes in the drive shaft torque. The working depth of the implement, which may be tractor mounted, semi-mounted or a pull type implement, is raised or lowered by a hydraulic lift system that is controlled by a control valve assembly connected to a source of fluid under pressure.

Abstract: A pneumatic impact mechanism for driving rod-like members having a hollow cylindrical casing with a tail portion and a front end portion. The casing accommodates a reciprocating stepped hammer piston defining in the casing, on the tail portion side, a variable volume rear end work chamber in permanent communication with a source of compressed air. The stepped hammer piston defines, on the side of the front end portion, a variable volume front end work chamber.The stepped hammer piston has a through-passing axial bore, and its small-diameter portion cooperates with the tail portion of the casing and has radial passages. There is provided a tubular guide member or element for receiving the rod-like member arranged coaxially with the stepped hammer piston and casing and secured to the tail portion and to the front end portion of the casing in such a manner as to cooperate with the stepped hammer piston and define therewith, with the outer periphery thereof an axial passage.

Abstract: A cooling system for the power plant of a self-propelled forage harvester or field chopper, generally located in the rear thereof, comprises an air chamber communicating with the atmosphere through laterally disposed filter screens and water-cooling radiators and through pairs of conical half-shells disposed point-symmetrically about ventilating fans integral with a unidirectionally rotatable shaft extending longitudinally in an opening in the top wall of the chamber. The shells, rigid with a support manually pivotable about the power-plant-driven shaft, normally direct air flow through the fans from the air chamber but may be rotated 180.degree. by a vehicle operator to temporarily reverse the air flow and pressurize the chamber, thus forcing air out through the radiators and filter screens, cleaning them of clogging debris collected during normal operation of the vehicle. Sealer strips provided around the openings in the air chamber for minimizing leakage.

Abstract: The effective sensor width of a path following vehicle guidance system is enlarged by having a first gain control amplifier for amplifying the sum of the path sensor signals, a second gain control amplifier for amplifying the difference of the path sensor signals and a third amplifier, in tandem with the second amplifier for amplifying the output of the second amplifier once the second amplifier's output has peaked out. All three amplifiers are gain-controlled by the same negative feedback signal. The outputs of the first and third amplifiers are synchronously detected to provide an error signal for an electromechanical steering servo for the vehicle.

Abstract: A vehicle cruise control device in the form of a Bowden cable connection to the engine throttle so as to be movable therewith as the operator controls the accelerator pedal, and a locking device selectively movable to various predetermined positions at which it can capture the cable connection and prevent the throttle from returning to closed position while still allowing normal opening of the throttle. The cruise speed is adjusted by selecting the predetermined position at which the locking device captures the cable connection. An inertial mass responds to braking or deceleration force on the vehicle to release the cable connection from its captured condition.

Abstract: An economical and effective auxiliary steering system for a vehicle having a relatively low maximum speed in reverse direction. A ground driven pump having an output when the vehicle is going forward is directed to a diverter valve, which valve is responsive to loss of hydraulic pressure in the main steering circuit to direct the said output to the main steering valve. A single spring loaded check valve isolates the main steering valve under auxiliary steering conditions.

Abstract: A perlite sound absorbing plate and a sound insulating wall constructed by arranging a number of said plates side by side and by assembling together into one integral body are disclosed. The plate is composed of a mixture including 1,000 cm.sup.3 by bulk volume of formed perlite particles each having a diameter of 0.1 to 7.0 mm, 100 to 140 g of cement, liquid rubber latex containing 5 to 20 g of solid ingredients and a suitable amount of water and produced by press molding with a compression ratio of 1.10 to 1.30. The wall is constructed by assembling a number of said plates each provided with a side groove with the aid of supporting columns and reinforcing plates, each having a ridge adapted to be engaged with the side groove of said plate.

Abstract: A mobile self-propelled aerial lift machine comprises a chassis, a swingable boom support structure mounted on the chassis, an elevatable telescopic boom mounted on the support structure and an adjustable work platform supported at the outer end of the boom. A plurality of hydraulic motors operable at variable speeds are provided to effect movement of the chassis, support structure, boom and work platform. The control system for the hydraulic motors includes an engine-driven destrokable radial piston-type pump mounted on the support structure and having a pressure port and a control (destroke) port whereby a change in the rate of fluid flow to the control (destroke) port effects a change in the fluid pressure at the pressure port. A plurality of solenoid operated selector valves are located on the support structure and are operable to permit fluid flow from the pressure port to the hydraulic motors.

Abstract: A platform attachment is disclosed herein which comprises a pair of posts having cross members connecting therebetween. Extensions are secured to opposite sides of each post at the bottom end of the post to receive therebetween a ladder rung. A pair of arms is connected to each of the posts and the arms are pivotally connected thereto. Each of the pair of arms receives therebetween one of the ladder rails. A platform is mounted upon the pairs of arms and includes members which are received between each of the pairs of arms.

Abstract: An airfoil, pivotally attached to a high speed vehicle, is positioned to produce a braking action on the vehicle by means of fluid-dynamic resistance. The airfoil may be positioned to produce a downward pressure on the vehicle and thus enhance conventional braking action. The braking action is further augmented by eductors which reduce the air pressure behind the airfoil and control the air flow about the airfoil. The eductors and a set of rudders combine to provide the requisite stability for successful high speed braking.

Abstract: A suitcase surrounded by paired circular raceways forming an endless track is disclosed. Into each of these raceways there is mounted a complementary revolving rim rotating upon bearings placed at intervals around the raceway. The rim, preferably taking the form of a circular tube, surrounds the suitcase. This rim forms the points of rotating transport over the ground. In operation, the suitcase is propelled by a handle which protrudes from the end wall of the suitcase between the raceways, yet permits convenient opening of the suitcase. The suitcase, because of its attachment at the handle, does not rotate. The tubes within the raceways do rotate and provide continuously revolving contact points with the ground.

Abstract: A foldable item of hand baggage comprises a body portion and a lid comprising a top portion and a side wall region, zip fastener means being provided at the free edge of the side wall portion and an adjacent part of the body portion for closing the hand baggage. Two types of reinforcement for imparting rigidity to the assembled hand baggage are provided. Inner rigid elements are provided in each of the lateral walls, being held to the rest of the body portion in a manner allowing them to be moved towards one of the front and rear walls when the item of hand baggage is to be folded.

Abstract: A transmission assembly with braking device, particularly for vehicles, of the type comprising a speed reduction gear system between a driving shaft and a driven shaft. The braking device is constructed so as to be able to brake, on the one hand, the driving shaft and, on the other hand, the driven shaft. In a preferred embodiment, said driving shaft is coupled to the sun gear and said driven shaft to the planet gear carrier, the reaction ring gear for the planet gears being fixed. Said braking device then comprises a set of braking discs non-rotatably mounted but able to slide on a sleeve itself fixed on the driving shaft, and of which a part, through the action of an appropriate control, can come into frictional contact with the fixed discs integral with the casing, whereas the other part, through the action of said control, can come into frictional contact with the discs integral with said planet gear carrier.

Abstract: The magnet core of an electromagnetic clutch is substantially J-shaped in radial cross-section and includes an outer pole ring which is spaced radially outwardly from and which only partially surrounds the outer pole ring of the rotor of the clutch. The controlled transfer of flux between the core and the rotor occurs both in a radial direction and in an axial direction.

Abstract: In a two-lever control unit including a shaft mounted on the main body of the unit, a clutch operating plate and a throttle operating plate both rotatably supported by the shaft, a clutch lever for moving the clutch operating plate and a throttle lever for moving the throttle operating plate, a locking pin extends through a bore in the main body and has one end engageable in three locking cavities formed in the clutch operating plate and the other end engageable in a locking cavity formed in the throttle operating plate. One of the operating plates, when turned, causes the locking pin to lock the other operating plate. Thus, the clutch lever, when operated, locks the throttle lever, whereas when the throttle lever is operated, the clutch lever is locked. This simple structure gives the control unit greatly improved safety.

Abstract: This turn conveyor apparatus is disposed between two conveyors having angularly related travel axes for the purpose of transporting articles, such as envelopes, from one conveyor to the other. The turn conveyor includes drive and idler sprockets having horizontal, angularly related axes of rotation, said sprockets being connected by an endless belt traversing a rotating corner disc assembly having a vertical axis of rotation and being disposed between the sprockets. The disc assembly includes upper and lower discs receiving the endless belt and said endless belt includes spaced friction pads on the outer surface. The disc assembly also includes a base disc located below the lower disc and having an annular surface disposed adjacent the endless belt and cooperating with the friction pads to grip the envelopes and transport them in an arcuate path from one angularly related conveyor to the other.

Abstract: An improved conveyor comprising an endless belt mounted for travel on a novel support structure permitting substantially horizontal pivotal movement about upright axes of one or both ends of the support structure from a collapsed side-by-side position to longitudinal alignment with each other whereby the endless belt folds about its longitudinal medial axis and then transversely upon itself about said upright axes.

Abstract: A platform carton has front and back panels connected by side panels. Panels for forming an article-receiving platform within the carton include a base panel extending from the bottom of the front panel, a riser panel formed by a continuation of the base panel, an apertured platform panel continuing from the riser panel and a glue flap at the opposite edge of the platform panel. The base panel extends from the front panel to the back panel while the riser panel lays against the inner surface of the back panel. The platform panel extends forward from the riser panel toward the front panel, to which it is secured by the glue flap. The platform panel and the base panel are both parallel to the top and bottom edges of the carton. A top cover flap connected to the back panel can be folded down over the top of the carton while a bottom cover flap extending from the bottom of the back panel can be folded upward to cover the base panel.

Abstract: Shipping container especially for printed circuit boards, composed entirely of paper board coated on inside surfaces with conductive carbon black particles to prevent an outside static electricity charge from passing through the container.

Abstract: A stackable, tray-type packaging unit for semiconductor discs, having a lr portion accommodating the discs and a matching lid, comprising two upright, elongated side walls in the lower portion and two narrow end walls, all walls as well as the lid consisting of deep-drawn plastic material inert to the disc material. A plurality of ribs are formed opposite to each other on the side walls, serving as guide means for the discs during the loading of the unit, stabilizing ribs for accommodating the discs are provided in the base of the lower portion on the joining line between opposite guide ribs. The lower part of the side walls are curved inwardly at an angle of 30.degree. to 60.degree. with respect to the perpendicular upper part.

Abstract: A urethral catheterization tray providing a sterile, self-contained catherization package and work area is described.

Abstract: A wall mounted standard for connecting shelf-supporting brackets to a wall. One form of the standard comprises means for connecting together two aligned wall-forming panels, while another form of the standard is used to connect a pair of panels which are oriented at right angles to each other to form a corner connection. Other forms of the standard are suspended from the top of a wall.

Abstract: After curing, cementitious blocks carried on a pallet are moved by a conveyor to a transfer apparatus which removes the blocks from the pallet and transfers them to another conveyor for delivery to a cubing mechanism. The transfer apparatus is provided with a block lift turn-over mechanism and a block push-off mechanism with those mechanisms selectively operable to provide two distinctive operational modes as necessitated by the types of blocks being transferred and the desired block attitude.

Abstract: A segmented controller arm configured and dimensioned to form a miniature kinematic replica of a remotely related slave arm. The arm includes a plurality of joints for affording segments of the arm simultaneous angular displacement about a plurality of pairs of intersecting axes, a plurality of position sensing devices for providing electrical signals indicative of angular displacement imparted to corresponding segments of the controller shaft about the axes, and a control signal circuit for generating control signals to be transmitted to the slave arm. The arm is characterized by a plurality of yokes, each being supported for angular displacement about a pair of orthogonally related axes and counterbalanced against gravitation by a cantilevered mass affixed thereto whereby the controller arm may be released without introducing unwanted motion in the slave arm resulting from gravitation of segments of the master arm.

Abstract: A removable attachment for a powered industrial truck, such as a fork lift, used to open and close freight car doors and the like.

Abstract: A CRT (cathode-ray tube) in combination with a notch-sealed band tensioned around the tube characterized in that the inner overlapping end portion of the band is folded at least twice upon itself and is positioned between the tube and the band. In the method, one end of the band is folded at least twice upon itself. The band is positioned around the tube with the end portions overlapping, the folded portion toward the tube and a sheathlike metal clip around the overlapping end portions of the band and against the inside of the end fold of the folded end of the band. Then, the clip is pushed against the end fold, and the outer end portion of the band is pulled until the desired maximum tensile force is applied, at which point the clip and overlapping end portions of the band are notched together.

Abstract: A device for capping a supplying opening of a fuel-tank of a motor vehicle or the like, comprises a capping outer casing of T-shaped cross section, and cylinder-lock means centrally mounted inside the outer casing for holding and releasing a locking condition, wherein although a distance frictionally driven by respective projections mounted on a rotary member against resilient force is fully, automatically relaxed to permit respective locking bars to be projected for locking and thus, the device is locked when a key fitted in cylinder-lock means is left in a free condition, the key fitted is arranged to be not detachable from cylinder-lock means without further manual actuation thereof in the same direction of the free returning direction thereof.

Abstract: An automatic, intermittently operable proportional mixing attachment for non-carbonated beverage dispensing machines having holding tanks in which beverages, reconstituted from proportional volumes of water and liquid concentrate, are stored; said attachment including an aspirator, a water delivery structure for the aspirator and connected with a pressurized water service system, a liquid beverage concentrate delivery structure for the aspirator and connected with a static supply of liquid beverage concentrate, a beverage delivery structure extending from the aspirator to the beverage holding tank of a related dispensing machine, a normally closed solenoid operated on and off valve in the water delivery structure and a float actuated control switch for the on and off valve arranged with its float in the beverage in the holding tank and operated to open the on and off valve when the level of beverage in the tank drops below a predetermined minimum level; and a bypass to adjust the minus pressure established in

Abstract: A wall mountable bracket has an upwardly opening pocket receiving a replaceable cartridge of toothpaste, the cartridge having a bottom outlet and a valve assembly for it. The cartridge is mounted with the dispensing valve at the lower end and the cartridge has an upper end wall movable downward toward the valve for dispensing the contents. A downwardly opening cup is fittingly received over the outside of the cartridge and inside the bracket pocket, and has a spring loaded plunger engaing the upper wall of the cartridge to urge the contents thereof toward the valve. The valve is a knob-operated, sprng-loaded gate valve. The cartridge-valve assembly is disposable as a unit when the contents of the cartridge have been exhausted.

Abstract: A device for unloading silos of divided material such as flour includes a rotary shaft on which axially spaced, radial members are carried. The members support flexible elongate elements which have a length no greater than the distance between the outer edges of the radial members and the walls of the silo.Rotation of the shaft causes the material to be fluidized and to pass down and out the silo without preventing simultaneous filling of the silo. The outlet from the silo is at its bottom end and discharge is achieved by helical elements which may be driven by the same motor as the rotary shaft.

Abstract: The invention relates to a wire clothes hanger having an upwardly projecting hook, and two cantilever arms extending from the hook in opposite directions. The free end of each of the arms is bent to form a downwardly projecting pair of spring jaws which are capable of gripping an article of clothing.

Abstract: The garment hanger construction comprises an attachment for a standard wire garment hanger. A pair of hanger bar attachment elements are secured on the downwardly inclined wire hanger bars and a pants bar attachment is secured on the wire pants bar. The attachments are of substantially greater width than the wire elements to which they are secured.

Abstract: A web aligning apparatus for use with multi-level web material such as carpeting, tufted fabrics and the like having a backing web and a pile on the backing web inwardly of a side edge of the backing web. The web aligning apparatus includes a pile engaging member mounted at a sensing location along the course of travel of the web for movement along a first path crosswise of the course of web travel and generally parallel to the face of the web at the sensing location to sense lateral deviations of the course of travel of the pile edge from a preselected position. The pile engaging member is also mounted for movement along a second arcuate path generally tangent to the web from a first position extending alongside the web backing at the sensing location toward a second position displaced along the arcuate path in the direction of travel of the web when the pile engaging member rides onto the pile.

Abstract: An improved control system for a dual slide type stock feeder for punch presses and the like, said control system being adapted to cause the feeder to execute two serial feed strokes in response to each cyclic operation of the punch press. The control system comprises a control plunger which is responsive to the movement of the press ram and which is adapted to actuate a fluid control circuit that causes one of said feed slides to execute a feed stroke and then causes the other feed slide to execute a feed stroke; there being two serial stock feed strokes produced for each cyclic operation of said control plunger. The feed slides may be controlled so as to operate in a substantially 180 degree mutual phase relation, or each may automatically complete an index stroke immediately after completing a feed stroke so that both of said feed slides are normally disposed in indexed positions.

Abstract: A paperboard bulk pin having a plurality of planar side walls and a bottom closure in which each side wall includes an integrally formed, inwardly projecting, laterally extending rib to reduce side wall bulging.

Abstract: A rural mail box is provided having an elongate enclosure and a mail-receiving tray slidable within the enclosure and including an integral front door for the mail box. The tray is hinged part way along its length to permit the front portion thereof to hinge downwardly when the tray is slid part way out to facilitate the positioning of mail in the tray. The mail box is particularly adapted to be formed of plastic material by injection molding.

Abstract: A rotor having an external fibre-reinforced ring or sleeve positioned coaxially about an internal rotor member. The internal rotor member has a frusto-conical outer surface and the fibre-reinforced sleeve is arranged on the outer surface of an internally frusto-conical intermediate sleeve, the conicity of which corresponds to the conicity of the internal rotor member. The intermediate sleeve with the external fibre-reinforced sleeve is pressed on the internal rotor member in the axial direction.

Abstract: A system for identifying a moving railway vehicle or any other object upon which is fastened an identification label having a number of vertical columns of light retransmitting medium, each column representing a digit number obtained by coding the column by insertion of a metal plate in front of the column. A wayside light transmitter/receiver unit provides a source of light beam directd toward the path of travel of the vehicle and also provides a light beam receiver responsive to retransmitted light signals from the label. The receiver decodes these signals using a control means such as a microprocessor and transmits all pertinent information in digital form to other data processing equipment employed by the user.

Abstract: An air structure comprises a double-skin wall construction having an outer skin that is substantially transparent to short wave solar radiation but relatively opaque to long wave heat radiation and an inner skin. Radiation converter elements, preferably in the form of black plastic diaphragms linking the inner and outer skins and effective to absorb solar radiation and to convert the same to heat energy are disposed in the inter-skin space. The structure is self-erecting on exposure to solar radiation, and may advantageously be combined with a heat store that emits heat and maintains the structure erected under conditions of reduced solar radiation availability. The structure may be free floating or may be anchored to the ground to form, for instance, a greenhouse or other enclosure.

Abstract: A wood burning system for selectively heating one, or several, rooms in a structure, such system including a fireplace with a firebox, a chimney based on a thermal vacuum principle of operation, a combustion dome interconnecting the firebox and chimney, an inlet passage and an outlet passage defined in the bottom wall of the firebox, and a barrier situated between the inlet and outlet passage to control communication therebetween.When the barrier in the firebox is closed and a glass door seals off the open side of the firebox, the outlet passage in the firebox introduces heated air for distribution through several rooms, while the inlet passage receives the return flow of thermally spent air from the ductwork. The thermally spent air passes over the fire in the firebox and escapes up the flue.

Abstract: A spray gun construction, comprises a housing part which is interconnected with a container part at its front end and a handle part at its rear end which has an actuating button. The housing part has a suction bore and a return bore located in fixed spaced apart relationship and a spray nozzle and surge chamber member which has a suction line connection which extends into the spray bore and a return line connection which extends into the return bore which alone or in combination with other pin and peg arrangements permit interconnection and alignment of the nozzle with the associated surge chamber on the housing in connection with a container or reservoir member containing the liquid to be sprayed.