Abstract: The drive system includes a drive pulley operably connected to a prime mover for selective rotation in opposite directions, a driven pulley, an endless belt trained about the drive and driven pulleys, an arm having a first end rotatably supporting the driven pulley and a second end mounted for pivotal movement of the arm and the driven pulley, a drive wheel, such as a sprocket, mounted on the first end of the arm for common rotation with the driven pulley, a rotatably mounted driven wheel, such as a sprocket, and an endless flexible member, such as a chain, trained about the drive and driven wheels for rotating the driven wheel in response to rotation of the drive pulley, whereby the resultant force applied on the drive wheel by the flexible drive member, when the drive pulley is rotated in either direction, is in a direction tending to pivot the arm and the driven pulley about the arm pivot axis in a direction for applying tension on the slack side of the belt.

Abstract: A grapevine suckering tool uses a rotor 10 having sucker flails 11 to remove suckers from the bases of a row of grapevines 12. The axis of rotor 10 is arranged within acute vertical and horizontal angles from the direction of the grapevine row. Sucker flails 11 are flexible straps each mounted on rotor 10 to have an outward extending length and a width oriented axially of rotor 10. As rotor 10 spins near the base of the grapevine row, flail straps 11 slap downward toward the vine base and drag over the ground knocking down, damaging, and breaking the suckers at the base of vine 12. Cylindrical sweeper brushes 32 can also be mounted on rotor 10 in place of flails 11 to sweep debris on the vineyard floor.

Abstract: A cross flow rotary type mower has a rotor (21) mounted for rotation about a vertical axis. A housing having an upper wall (10) and side walls (29, 30, 31) surrounds the rotor to form a cross-flow blower. A portion (37) of the upper wall is expanded axially of the rotor to provide an axially extending vortex chamber (36) within the housing. The blower has an air inlet region (26) and an air outlet region (18) where the outlet region has a greater vertical height then the inlet region.

Abstract: A multiple twisting machine, particularly adapted for quadruple twisting, said machine adapted to helically twist unitary strands and form a cable. The machine comprises two coaxially rotating frames, one frame being driven by the other frame via a reverser, said reverser rendered immoble by a weight and coupled to each of said frames by a belt. One of the frames comprises an external frame driven by pulleys at its ends and comprises two side plates connected by a stretched, taut rope which guides the cable over a portion of its path. The unitary strands enter the machine and the cable follows a predetermined path which ends where the cable is twisted about a cradle pulley which is stabilized by the weight. The internal frame is light and balanced to permit an elevated speed at rotation and speed up cable production.

Abstract: There is described a two-for-one spinning or twisting spindle in which thread drawn from a take-up package is threaded through from the bottom upwards by means of a compressed-air-operated threading arrangement so that it can be connected to thread, coming from a supply package, at the top end of a thread entry tube. In the arrangement shown, a thread storage disc of a two-for-one twisting spindle has therein a thread exit passage 8 the inner end of which opens into a short tube 10 which opens in turn into a hollow shaft 12 of the spindle, leaving an annular gap 11. In operation of the threading arrangement, compressed air is fed into a hollow shank 5 of the spindle from below and flows upwards through the annular gap 11. Because of this the short tube 10 acts as an injector nozzle which sucks the thread into the thread exit passage 8 from the side and transports it upwards through the hollow shaft 12 of the spindle.

Abstract: SZ twisting of stranding elements of electric or optical cables and lines is accomplished by means of twisting apparatus which consists of a twisting section defined by a first and a second twisting point within which at least one twisting head is arranged. The twisting head includes at least one deflection pulley or deflection roller which is stationary in the circumferential direction of the material to be twisted and with which the material to be twisted is in contact over part of the circumference. The axis of the deflection pulley or deflection roller is set at an angle to the axis of the tautly conducted material to be twisted. The inclination of this axis can be varied at intervals and the location of the deflection pulley or deflection roller relative to the material to be twisted can be changed at intervals. By setting the axis at an angle, a force component in the tangential direction which leads to a twisting of the material to be twisted, is exerted on the material to be twisted.

Abstract: Links for steel sprocket chains are each formed of a pair of dodecagon shaped broadened portions joined by a web with parallel sides. When cut from a sheet metal plate the boundary edges of the broadened portions and web of one link are in contact with and at least partially congruent to adjacent links.

Abstract: A heat recovery anti-icing system is disclosed. The heat recovery system includes a blower which removes air from the air flow path of a combustion turbine power generating system and circulates the air through a heat exchanger located in the exhaust stack of the combustion turbine. The heated air circulating through the heat exchanger is returned to an inlet filter compartment in the air flow path so as to maintain the temperature of the air in the inlet filter compartment at an elevated level.

Abstract: A field-emission ion source in which, under the influence of an electric field, ions are released from a metal or metal alloy present in an enclosed space in the liquid state. The ions are emitted from this space through a very narrow slit. This slit may be straight or curved. The field-emission ion source can be used in an ion thruster apparatus comprising an emitter module, an electrode system, and a power supply unit. A plurality of emitter modules can be combined to form an ion thruster apparatus having a greater ion current output. Instead of a liquid metal as the propellant, a metal in the solid phase can be supplied to the emitter module, which metal is melted in the emitter module.

Abstract: A control valve is mounted on an air relief line branched off from a secondary air supply line extending from an air pump to an exhaust pipe for controlling the pressure of air in the secondary air supply line. The control valve so controls the pressure of the air in the air supply line as to increase it when acceleration of an engine starts or to decrease it when deceleration of the engine starts, whereby the amount of the secondary air supplied to the exhaust pipe is controlled in response to the acceleration and deceleration of the engine.

Abstract: A vehicle vacuum power system which insures sufficient vacuum power to operate a vacuum brake booster and a vacuum operated road speed control system. Because of the low vacuum, high flow rate needs of a cruise control system, the cruise control is connected directly to the engine manifold through a check valve. A small orifice from the vacuum pump in parallel with engine manifold vacuum provides sufficient vacuum for the cruise control when the manifold vacuum is not sufficient. The vacuum pump is in series with manifold vacuum and is operated in response to a pressure switch which allows the pump to run only when brake booster vacuum is low. Manifold vacuum is sufficient most of the time, but the orifice to the cruise control tends to cause a fast loss of brake booster vacuum, causing the vacuum pump to run when it is not actually needed. The vacuum regulator shuts off the flow through the orifice when it is not needed, considerably reducing the pump operational time.

Abstract: A hydraulic system for motion amplification is disclosed. The system provides hydraulic fluid on both sides of a pair of hydraulic cylinders, creating a pressurized closed loop which provides precision control during both forward and reverse strokes of each hydraulic piston.

Abstract: A fluid pressure intensifier in which a body has a side wall and first and second end walls. A tube extends inwardly in the body from the first end wall and a piston head is slidably disposed on the tube. A cylindrical element in spaced relation to the body side wall extends from the piston head toward the second end wall. A fluid inlet in the second end wall supplies pressurized fluid to move the piston head on the tube. A fluid outlet through the tube transfers pressurized fluid from within the element out of the intensifier. The amount of pressure intensification is proportional to the surface area differential of the piston head and a cross section of the element.

Abstract: A bypass control apparatus for turbocharged internal-combustion engines, comprising an actuating cylinder for a bypass valve of the bypass control apparatus, wherein the pressure of a fluid medium or fluid in the actuating cylinder is controlled by fixed throttles and throttles adjustable by the boost air pressure arranged in the fluid supply and discharge pipes or lines.

Abstract: Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal energy extracted from the hot water for operating a primary turbine-motor for driving a primary electrical generator at the earth's surface, the solute-bearing water being returned by a reinjection well. A surface-located auxiliary turbine-pump combination with both turbine and brine pump elements acting in series with down-well counterparts to furnish the pressure necessary for reinjection of the brine.

Abstract: A power station includes a main pipe for a gas under pressure, a branch pipe connected to the main pipe to receive a flow of gas, an expansion machine connected to the branch pipe for conversion of pressure energy of the gas into usable energy, a heat pump including a compressor and a heat exchanger, the compressor being coupled for operation to the expansion machine, and the heat exchanger being disposed in the branch pipe for heating the gas therein, and an electrical power generator driven by the expansion machine.

Abstract: A method of obtaining work (e.g. electrical energy) in a counterpressure steam system in which the steam is expanded to produce work, e.g. drive an electrical current generator, in which the steam, prior to the expansion, is passed into isobaric heat exchange at an elevated pressure with expanded steam and is then heated substantially isobarically by externally supplied heat. After expansion and at a relatively low pressure, the steam is substantially isobarically cooled.

Abstract: A portable, lightweight thermoelectric environmental chamber includes insulative side walls, an insulative bottom and an insulative cover that is hingeably connected to one of the walls. A handle is attached to the upper surface of the cover. A thermoelectric unit includes a thermoelectric heat pumping device disposed between an internal heat exchanger disposed inside the thermal compartment of the environmental chamber and an external heat exchanger disposed outside of the thermal compartment. An external blower continuously forces outside air along the surface of the external heat exchanger when the thermoelectric environmental chamber is turned on. An internal blower is controlled by a momentary switch that turns the internal blower on when the cover is closed. A shroud encloses the internal blower and guides air in close proximity to the internal heat exchanger and recirculates air in the compartment to maintain a uniform temperature in the thermal compartment when the cover is closed.

Abstract: The treatment of dilute solutions and freeze concentrations thereof by means of steam jet refrigeration pre-cooling of a feed solution sprayed into an absorber-freezer means in which heat is absorbed from the jet refrigeration and from which ice slurry is charged into a melter-worker means discharging product melt and concentrated by-product, and super-cooled by vapor compression refrigeration wherein the refrigerant is simultaneously condensed and chilled by the steam jet refrigeration for pre-cooling the feed solution, steam power therefor being supplied by the Peltier effect in a diffusion still separating water and concentrated refrigerant.

Abstract: A protecting device for protecting a refrigerant compressor from overheating or seizure caused by a shortage of refrigerant by any chance such as leakage thereof. The device includes a temperature sensor disposed on the outer wall of the compressor casing in the vicinity of a refrigerant intake suction suction port for sensing the temperature of the outer wall to output the sensed or measured data and a discriminator for discriminating an occurrence of refrigerant shortage by an excess of the data over a predetermined condition for comparison. The signals from the discriminator cause a warning issuance of the refrigerant shortage or an automatic stoppage of the compressor operation.

Abstract: A capability control apparatus for a cooling system having a direct expansion type evaporator comprises a control valve mounted in a heating system for a generator for controlling an amount of heat to be given to the generator. Temperature sensors are mounted at inlet and outlet sides, respectively, of a cooling system for an absorber, and an arithmetic unit is connected to the temperature sensors and the control valve. The arithmetic unit calculates the amount of heat to be given to the generator based on signals transmitted from the temperature sensors to the unit and issues and transmits to the control valve a control signal for controlling the latter.

Abstract: A heat pump having successive defrosting operations initiated, controlled and timed by a microprocessor-based controller. The time intervals between defrost cycles are periodically varied as needed, dependent on outdoor temperature and certain operating conditions of the heat pump system. Initially the microprocessor is programmed to select and establish a minimum outdoor temperature-related defrost lockout time interval which may then be automatically extended during the lockout period by amounts of time during which, simultaneously, the outdoor coil is above a predetermined coil temperature level and the heat pump compressor is not running. The minimum defrost lockout interval is periodically revised and established, within certain limits, at a value which is dependent on outdoor temperature. An optional feature allows different time vs. temperature lockout time interval functions to be established for different geographical areas having marked differences in average cold weather climatic conditions.

Abstract: An electric refrigerator with an automatic ice-making unit which comprises in combination a cooling unit including a compressor, a condenser and an evaporator with a refrigerating chamber and an auger type automatic ice-making unit with an ice-storing chamber.

Abstract: A sensing device detects "flashing" in a refrigerant liquid line, upstream from the expansion valves of the evaporators of a refrigeration system. In response, a valve opens in a line extending between the compressor discharge line and a receiver, to bypass discharge vapor into the receiver, thus raising the head pressure to an extent sufficient to satisfy the requirement for a steady liquid refrigerant flow at the expansion valve. The head pressure is raised only to the minimal extent necessary to satisfy this requirement. Disclosed is a sensor of the type incorporating a sight glass in the path of a beam extending between photoelectric cells, though other sensing devices of an equivalent nature can be used. The invention can comprise a single sensing device in the liquid line extending to one or more evaporators connected in parallel.

Abstract: A container construction and combination in which a container for confining water is provided with a metal heat exchanger disposed vertically within the container. The heat exchanger is comprised of inner and outer tube structures joined together in heat exchange relationship by fins extending between the tube structures, the fins having cross sections sized to conduct all the heat of a refrigerant in the inner tube structure to water located adjacent the outer tube structure. In addition, the outer tube structure has outwardly directed fins extending in a vertical direction within the container. The heat exchanger has upper and lower ends within the container, and means are provided for connecting the upper end of the heat exchanger to a source of heated refrigerant through an upper opening in the wall of the container, the refrigerant being vaporized when heated, and condensed when cooled in the heat exchanger.

Abstract: Cryogenic refrigeration system 10 employs a screw compressor 72 and a screw expander 70 wherein one rotor of the compressor and one rotor of the expander is mechanically driven, including a magnetic coupling 50, 52 between the compressor and expander rotors. The other compressor rotor and other expander rotor is driven only by the connected rotor.

Abstract: A circular knitting machine, especially of body garment knitting type, has drive arrangements for a pair of rotary cam carriers of conventional lay-out involving a motor, drive shafts and upper and lower gears for the respective cam carriers. Instead of mounting the creel with yarn fast with respect to the upper gear there are provided means mounting the creel coaxially with the ring gears and permitting relative angular movement of the creel and the ring gears, at least one drive abutment for engaging the creel to rotate it conjointly with the ring gears and a shock absorber associated with the creel and the ring gears to thereby permit the creel to overrun the ring gears and move away from the drive abutment on stopping the motor and drive shafts.

Abstract: An improvement for knitting pattern areas with hosiery knitting machines having a rotatable cylinder carrying latch needles therein, a knitting station at which a plurality of yarn feed fingers are independently movable into and out of yarn feeding positions for feeding background yarn at a basic level and pattern yarn at a higher level above the cylinder, and means for selectively positioning the needles at either a basic position for receiving only background yarn or an extended position for receiving both background and pattern yarn, the improvement being an auxiliary feed finger for feeding background yarn at a level more closely spaced from the cylinder than the basic level to needles at the basic position and below the latches of needles at the extended position for floating of the background yarn in knitted pattern areas behind loops of pattern yarn formed by extended position neeldes.

Abstract: Locking device for securing a firearm to a wall, having a first part securable to the wall and a second part insertable through the trigger guard of the firearm to be engaged with the first part, the second part being so shaped as to then retain the firearm on the wall. The second part has a shank portion which enters into an opening in the first part and a lock is provided operable to hold the shank when so entered. The first part is securable to the wall by screws passing through screw holes in the first part, which screw holes are selectively exposable by rotating a cover plate on the first part to align an opening in the cover plate with the screw holes. When the second part is locked to the first part the shank passes through the cover opening into the second part to lock the cover against rotation so that it cannot be rotated to a position giving access to the screw holes.

Abstract: An antitheft device is provided for use with a reversible type key. The device includes a plate movable in a slot extending transverse to the direction of a key-receiving slot. The key entering the slot moves the plate which, in turn, pivots a lever to latch with the lock to prevent the antitheft device from becoming operative as long as the key is in the key-receiving slot. The plate has a guiding surface which rides in a plane surface on the key as the key is inserted. The plane surface on the key moves the plate and lever to the desired position.

Abstract: A combination lock having a lock housing with a spring bolt. A manually operable combination dial is provided outside the housing to operate a standard combination mechanism and a bolt retracting cam. A bolt retracting element is secured to the bolt and engageable by the bolt retracting cam when the combination mechanism is operated to a predetermined condition. By turning the dial the retracting cam is operated and the bolt is retracted. A disengagement mechanism disengages the bolt retracting element from the retracting cam, after the dial is released and the bolt is then displaced to its locked position.

Abstract: A removable core cylinder lock utilizing twisting tumblers and a latch bar provides maximum security. Both operating and control keys have at least one skew cut bit to operating the twisting tumblers. A centrally positioned cylinder retainer is rotatable with a control key to remove the lock from its shell.

Abstract: An axial pin tumbler type lock with alarm triggering capability upon an attempt at picking by stemmed locking pins which will close a circuit through a contact element wherein the contact element is seated against the rear of the stationary sleeve which is of insulating material, the contact element having openings therein which allow the pin stems to pass through and beyond the contact element, and an insulating ring which is fixed to and rotatable with the spindle, the insulating ring being also made of insulating material and having a plurality of bores that can receive the pin stems thereby preventing the application of the requisite torque to defeat the lock by picking.

Abstract: A pick-resistant-multiple-pin-tumbler cylinder for a lock is disclosed, the principal embodiments of which include an integral, key-displaceable, booby-trapped, lock-up element within the cylinder shell, and slidably mounted in relation to a portion of the rotationally displacable cylinder plug and in which the lock-up element contains a T-shaped peripheral notch which engages and receives a fixed pin or lug projecting from the bore and is thus both slidably and rotatively received in the shell and spring pressed axially for engagement of its shaped notch with the pin, whereby the peripheral dimension of the notch limits the rotation of the plug to a small angle until the lock-up trapping element is thrust towards the rear of the cylinder through the insertion into the plug's keyway of a properly profiled key, imparting a predetermined linear displacement effecting disengagement of the lock-up element.

Abstract: The present invention relates to an electrically actuated lock of the type comprising a rotor pivoting in a body and capable of being locked in relation to the said body by locking members constituted by pairs of opposed pistons or by keepers. The locking members are displaced by notches of a key, coded to permit the rotation of the rotor by action upon the key head. In this invention the unlocking of the rotor is effected by electric means without any opening of the rotor to the external environment, thus ensuring perfect sealing and inviolability. The lock comprises a key shank provided with coded notches, the shank being connected in translation with the movable armature of an electro-magnet, the rotor being provided with a graspable head by means of which the user can rotate the rotor when unlocked by the key.

Abstract: An outlet tube comprising a unitary material sheet folded into a rectangular shape and having overlapping ends secured with rivets, the outlet tube further including flanges extending outwardly from one end of the walls of the rectangular shape, and notches at the corners of the other end of the walls to permit folding inward of the end portions of the walls to provide a taper to the rectangular shape.

Abstract: A folding machine has a pair of longitudinally extending forming members which in a rest position have horizontal co-planar upper surfaces 22 and 23. In use as a folding machine a holding tool (not shown) is supported on a holding bar 33 to hold a workpiece which is folded by swinging the forming members 15 and 16 upwardly and outwardly as shown. The folding machine is modified in accordance with the invention by the provision of a vertically guided horizontal platten 41 connected to the forming members by pivoted links 42 and 43 to enable the apparatus to operate a punch and die set 48. A fixed abutment 51 on the holding bar 33 operates the punch as the platten is raised.

Abstract: A method of making a heat shield for an exhaust system tailpipe which comprises the steps of positioning a blank of sheet metal between a die having a forming surface of generally arcuately concave cross-sectional configuration which extends in a generally arcuately convex direction and a straight cylindrical body of elastomeric material having a longitudinal axis extending generally tangentially with respect to the arcuately convex direction of extent of the die forming surface, effecting an initial relative movement between the die and the cylindrical elastomeric body in a direction toward one another so as to compress a central portion of the sheet metal blank to a central portion of the die forming surface by a central portion of the exterior surface of the cylindrical elastomeric body while the latter is in a straight condition, and progressively flexing opposite end portions of the cylindrical elastomeric body in directions toward the end portions of the die forming surface so as to progressively compre

Abstract: The output of a transducer is passed to an electrical circuit for supply to a fuel control network. In order to check the output of the transducer the output of the electrical circuit is sampled in a sample circuit when the movement of the member associated with the transducer is a known value. The signal from the sample circuit is compared in a comparator with a reference signal. Any difference is passed to a gain determining circuit which calculates a new gain value for a variable gain amplifier in the electrical circuit. The value of the gain is retained in a holding circuit and supplied to the amplifier until further adjustment is required.

Abstract: A device for calibrating and/or testing a pressure-responsive transducer comprises a piston and cylinder assembly connectable by a transducer dome to a pressure-sensitive face of the transducer. The piston and cylinder assembly comprises a relatively small diameter chamber through which a piston is controllably movable in air-tight contact with the interior wall of the chamber. The relatively small diameter chamber is in communication with a larger volume compression chamber, which is provided with an outlet port which is sealed an adaptor for connecting the piston and cylinder assembly to said dome.The piston is manually movable through the small diameter chamber from a retracted position, in which the chamber is vented to ambient atmospheric pressure, through a series of predetermined intermediate positions, each of which corresponds to a known increased pressure value in the dome.

Abstract: Density of a sample or its concentration are sensed by a fluidic device hng a nozzle with a divider for emitting the sample and a reference fluid as layers of a single laminar jet. The deflection of the jet in a fixed force field is sensed as an indicator of density or concentration. The same device can measure acceleration transverse to the nozzle axis or attitude in a fixed force field as a function of sensed jet deflection. The sensitivity of the acceleration and attitude sensor is a function of the density of the two selected fluids used in the layered laminar jet.

Abstract: A method and apparatus are disclosed for detecting leaks in fluid processing systems using sulfur hexafluoride as a tracer. Leak detection can be carried out with the processing system continuing in operation by using the apparatus according to the method of the invention, so that shutting down any part of the processing system in order to check for leakage can be avoided.

Abstract: An apparatus for measuring or observing parameters representative of the coagulation and/or the lysis of a coagulable liquid, such as blood, comprises a torsion thread, a driving body supported by the torsion thread to be dipped in the liquid, a vessel containing the liquid is oscillated with a predetermined angular amplitude and period around an axis substantially identical with the torsion thread.Detection means comprise an inductor driven by the thread and a fixed position-detector which delivers an electrical signal representative of the amplitude of the oscillations of the torsion thread.The torsion thread is constituted by a wire stretched between two anchoring points and bearing the mass.

Abstract: An operating cam for use with a hardness tester may comprise: first and second cylindrical journal portions for respective disposition with first and second cylindrical holes provided through a housing of the hardness tester; a substantially cylindrical cam portion of smaller diameter between the journal portions and the axis of which is eccentric to the axis of the journal portion; an end portion adjacent the second journal portion having a common axis therewith and engageable for rotating the cam member about the common axis between no load, minor load and major load positions; and stop portions adjacent the end portion engageable with corresponding stop portions on the tester housing for limiting rotation of the operating cam between the no load and major load positions.

Abstract: A test stand for measuring the thrust produced by a jet engine includes a base and a floating frame having the engine connected thereto, with the floating frame being disposed in spaced, parallel relationship to said base. The base and floating frame are interconnected by a plurality of elongated support flexures, each of which is provided with a first and second elongated generally planar webs, disposed in axial alignment and with the plane of the first web being orthogonal to the plane of the second web. The flexures are disposed such that the plane of the fist web is perpendicular to the logitudinal axis of the jet engine. In operation, the thrust of the jet engine causes movement of the floating frame relative to the base thereby resulting in a corresponding bending of the flexure, with the bending being localized in the first web to facilitate its measurement. A control circuit is provided which includes a plurality of transducers that are bonded to the flat surface portion of the first web.

Abstract: An apparatus for the in situ measurement of the deformation and stress conditions of a string of casings in a drilled oil well is provided with an antimagnetic measuring section mountable in the string of casings at a selected depth and having extensometers fixed on the mantle thereof and a first electronic unit. The unit includes printed circuitry mounted on the measuring section and receptive of the signals from the extensometers for transmitting same. The apparatus also includes a drill hole probe extendable into the interior of the casings to the depth of the measuring section and a second electronic circuit receptive of the transmission from the first electronic circuit to apply same to a cable attached thereto for processing at the surface.

Abstract: A graphical plot of pressure versus time during pressure build-up in a temporarily closed well is matched to a type-curve on a graph of such curves to determine if the well is fractured, acidified, fissured or damaged.

Abstract: Pressure changes in the engine case of an automobile are sensed to compute and display the engine rpm irrespective of the types of engines. A pressure sensing element is mounted on the oil filler port in the engine cylinder head cover by means of a mounting member made of an elastic material.

Abstract: Reconstruction of two-dimensional distribution of attenuation coefficients or sound velocities in a cross-sectional plane of an object is achieved by carrying out a plurality of measurements of absorption or of flight time with ultrasound bursts directed by elementary transmitting probes along several different incidences in the sectional plane. Switching between successive measurements is carried out by electronic scanning, without movement of the individual probes. Focusing of the burst energy transmitted by a group of probes is achieved by applying a same electrical signal to the probes with appropriate delays. The secured signals are stored and, after completion of the scanning, they are combined for computation of the distribution.

Abstract: A rotary ultrasonic testing apparatus includes an annular stator; an annular rotor mounted on the stator for rotation about a workpiece to be tested as it is moved through the stator and rotor; and an ultrasonic probe assembly mounted for rotation with the rotor, said probe assembly comprising a cranked arm pivotally mounted at the crank thereof upon a bearing pin having an axis parallel to the axis of the rotor, the cranked arm carrying towards one end an adjustable counterweight and at the other end an ultrasonic probe block and guide shoe for facing to the surface of the workpiece, said bearing pin being adjustable in position relative to the rotor axis, spring means for limiting movement of the arm about the bearing pin, and water supply means connected to the probe pad.