Abstract: A crimping tool includes a pair of arm members and a driving mechanism such as a pair of handles for moving the arm members. An elongated working jaw is mounted on each of the arm members, one of the working jaws having a female die and the other working jaw having a male die arranged thereon. The female die has a notch, and the male die has a base part and an elongated leading face spaced from the base part. A locking mechanism prevents the driving mechanism from returning to an open position before the driving mechanism is brought to a fully closed position. A resilient elastomeric block is provided in the tool to enable the driving mechanism to be brought to the closed position when an article to be crimped is located between the working jaws.

Abstract: An apparatus for repairing and straightening vehicles includes upper and lower tracks supported in vertically spaced relation by a frame, each track including a pair of latterally spaced apart and longitudinally extended side members. A plurality of tower assemblies are supported on the upper and lower tracks for longitudinal movement therealong. Each tower assembly includes a flexible tension member adapted for securement to a vehicle positioned between the side members and a power source for pulling the tension member toward the tower assembly to thereby straighten the vehicle. The track supporting frame includes a superstructure above the upper track and a plurality of upper pulleys adjustably mounted on the superstructure whereby each tension member may be trained about one of the upper pulleys for exerting a pulling force on the vehicle from an elevation above the upper track.

Abstract: A method and apparatus for resolving overlapped chromatographic peaks or other overlapped data obtained from operation of a differential migration apparatus used to analyze a substance whose composition is to be determined. The invention involves using a second analytical apparatus, such as a spectrometer, to supplement the data obtained from the basic differential migration apparatus. A multi-channel detector is used to monitor and record the various sets of data obtained from these apparatus. Data corresponding to regions of overlap identified by the apparatus are assembled in a measured data set. An estimated data set is then compiled describing the estimated migrational time behavior of each of a plurality of compounds present within the overlapped region. An identifying data set is then calculated based upon the estimated data set and the measured data set.

Abstract: A multiport flexible diaphragm controlled valve is disclosed. The parts are all interconnected by low dead volume channels. The valve provides extremely fast response times, no moving parts other than the control diaphragm, operability over a wide range of operating conditions including high temperatures and is adaptable to use with all types of chromatography systems. The valve may also be utilized in a double sided configuration enabling two independent flow patterns to coexist simultaneously and be switched totally independent of one another.

Abstract: This invention relates to a method of determination of the change in subsurface structure of the earth resulting from the application of fluid pressure at a selected point, at a selected depth, in the earth, by measuring at least one physical parameter of the contour of the surface of the earth above the point of application of fluid pressure. The method involves positioning a plurality of tiltmeters on the earth above the point of application of fluid pressure arranged in a known array, and measuring the change in angle of tilt of the earth's surface at the point of placement of each sensor while varying the pressure and flow rate of fluid into the earth at the selected point. This invention further teaches how the individual values of incremental tilt at selected points on the earth's surface can be processed to provide indication of the azimuth of the vertical fracture in the earth, and an estimate of length of the fracture.

Abstract: Improved method and apparatus for indicating losses of stored liquid materials or penetration of liquid in liquid storage tanks, in connection with a liquid meter. The level change is automatically measured by means of a level meter as a function of time intervals, and a level change not caused by removal or filling under normal operation conditions is indicated as a loss of stored material (such as e.g. due to theft or leaks) or as a penetration of liquid (such as e.g. ground water).

Abstract: A blood sedimentation device has a transparent small-diameter sedimentation tube and is provided with a calibration mark a short distance below its upper end. The column of blood is introduced into the sedimentation tube and is precisely bounded at the lower end of the tube. The device has a displacement sleeve surrounding the lower part of the sedimentation tube in an airtight manner allowing movement by sliding, and further has a tubular receptacle, closed at the bottom, surrounding the displacement sleeve in an airtight manner allowing movement by sliding, this receptacle accomodates the blood sample.

Abstract: Method and equipment to determine, in situ, in a rigorous and repetitive way, the load bearing characteristics or geotechnical parameters of a sandy soil, according to the following phases: circumscribing, in situ, in the sandy soil, a sand sample, having a tubular, cylindrical shape, with a predetermined external diameter, a predetermined internal diameter, and predetermined length; applying to the sample, in correspondence to its internal, cylindrical surface, a radial pressure of predetermined value; and applying to the sample, in correspondence to its upper annular surface, an axial pressure, the value of which is made to increase to a value at which the sample ruptures. The geotechnical parameters are easily deduced from the value of axial pressure which causes the rupture, as well as from the values of the radial pressure and of the internal and external diameters of the sample itself.

Abstract: A method of open borehole logging is disclosed which provides a mud filtrate penetration index which is proportional to the degree of mud filtrate invasion causing residual oil removal from the vicinity immediately surrounding the borehole. The present invention utilizes a unique combination of formation density logging, dielectric constant logging and gravity meter measurement techniques to arrive at this mud filtrate penetration index, which may also be used to evaluate the probable reliability of residual oil determinations made by these or other logging techniques.

Abstract: A method and apparatus for in situ measurement of flow characteristics in boreholes or the like is disclosed for determining various formation characteristics such as permeability, particularly in the range of approximately 100-1,000 microdarcies and lower. One embodiment of the method and apparatus contemplates formation of a test interval in the borehole by a pair of expandable packers, additional guard zones being formed in the borehole at either end of the test interval by two additional guard packers, suitable flow conditions being simultaneously and separately measured within the test interval and each of the guard zones in order to permit determination of multidirectional components of permeability, porosity and other characteristics of the particular formation. Another embodiment contemplates whole hole testing where similar data is developed for a test interval formed between a single packer and the end of the borehole and one guard zone formed by a single additional guard packer.

Abstract: A machine for calibrating clips used for clamping blood vessels during surgery. First and second heads are arranged in a frame in opposed relation for relative separating movement from a start position in which the heads are bottomed together. The presented adjacent ends of the heads have registering hooks oriented transversely and parallel to one another, each of the hooks having an adjacent clearance opening for receiving the jaw of an inserted clip. An insertion stop is positioned behind the hooks for limiting the degree of insertion. A drive is interposed between one of the heads and the frame for separating the heads by a predetermined increment thereby to spread the jaws of an inserted clip by a reference amount. A force transducer is interposed between the remaining head and the frame for producing an electrical signal which depends upon the reaction force corresponding to the reference separation.

Abstract: A mounting apparatus for a liquid flow meter adapted to be detachably mounted upon the top edge of a weir. The mounting apparatus includes a base plate supporting a clock-driven recording drum for rotary movement above the base plate and for supporting a stilling well below the base plate. A float shaft, having a float at its lower end within the stilling well, extends through the base plate for vertical reciprocal movement and supports a scribing tool above the base plate for scribing engagement with the recording drum. The recording drum, scribing tool and all other elements supported above the base plate are enclosed in a bell jar housing sealingly held against the top surface of the base plate to provide sufficient air pressure to limit the rise of any liquid within the bell jar housing.

Abstract: In order to sense a liquid level, an input light pipe and output light pipe have angled ends such that light supplied to the input light pipe is directed from it to the output light pipe by total internal reflection as long as the ends are in a gas. When in a liquid, the index is such as to cause light in the input light pipe to refract into the liquid and not reach the output light pipe. By observing the other end of the output light pipe it becomes possible to determine if the angled ends are in liquid or gas, and thus detect a liquid level.

Abstract: A device for measuring the density of fluids comprises two float elements of unequal density distribution pivotally mounted on a common axis about which they rotate in opposite directions with change of density of the fluid in which they are immersed. The density is indicated by the position of an index carried by one element relative to a scale carried by the other element. Scale range is increased and scale linearity is improved by having the elements respond respectively differently to density changes in the upper and lower density ranges. Temperature compensation is effected by the choice of materials for the float elements relative to the thermal expansion characteristics of the fluid, and by the manner in which the relatively more dense and relatively less dense portions of each float element are mounted with respect to the axis.

Abstract: An electro-static capacitive accelerometer is a square law device and includes two fixed plates and an intermediary movable plate. A control circuit detects unbalances in the accelerometer, due to acceleration, and generates a signal which induces a corresponding electro-static corrective torque on the accelerometer thus forcing it toward a null condition. The signal is proportional to the acceleration. The invention eliminates prior art summing amplifiers in the control circuit for linearizing the torque of the accelerometer.

Abstract: AE signals due to a crack developed in a metal test object are detected by a number of AE sensors mounted on the metal test object. Based on time differences between the signals from the respective AE sensors, crack source points are determined. Then, based on the crack source points, a crack source plane is determined. The crack source plane is divided into a number of areas and a point of maximum number of crack source points in each of the areas is determined. Based on the points of maximum number of crack source points in the respective areas, a shape of the crack in the test object is determined.

Abstract: A parameter representative of a physical property of a continuously moving metal strip is determined by repetitively generating acoustical shock waves, containing ultrasonic frequencies, and adjacent the strip and measuring the speed of transmission of the shock wave in the strip. An electric spark generator with a collimator feeds the acoustic energy to the strip 10 and four microphones arranged as a first pair on opposite sides of the strip spaced a known distance from a second pair also on opposite sides of the strip pick up the signal transmitted through the strip. The difference between the mean time of arrival at the first pair and the mean time of arrival at the second pair enables the velocity of propagation in the strip to be determined despite movements of the strip transverse to its plane. The velocity of propagation in particular may be used as a measure of Young's modulus and hence, in the case of a material such as aluminium, as a measure of the temperature of heat treatment.

Abstract: The present invention relates to a system for the nondestructive testing of the thickness of boiler tubes. The system comprises a probe assembly which includes a mounting unit for mounting the assembly in a mud or water drum of a boiler at the location of a boiler tube to be tested. The probe assembly is comprised of an ultrasonic transducer for transmitting and receiving ultrasonic signals. The probe assembly further includes a motor drive connected to the transducer. A control unit is provided which includes a motor control portion connected to the motor drive to selectively position the transducer at a plurality of locations in the boiler tube to be tested. The control unit also includes an ultrasonic drive for producing an ultrasonic pulse for driving said transducer means. A water control is connected to the control unit, a source of water supply, a drain, and the probe assembly.

Abstract: A compound angle wedge for coupling ultrasound into a turbine disc to interrogate the keyway area of the turbine disc, the compound angle wedge having a cylindrical surface which is disposed to contact the object to be interrogated and which has a double offset with respect to an interrogating transducer mounting surface.

Abstract: The deflection, due to inertia, of the free end of the cantilever rod of fiber optic material is an indication of the acceleration of the supporting structure of the rod. The indication of the deflection of the rod is by detecting light propagating the free end of the rod. Disclosed are fiber optic rod sensing element structures for acceleration indicators, a rate of change of acceleration indicator, a rotation indicator, and a latching acceleration indicator.

Abstract: A shield for a gas sampling probe is disclosed. The shield includes a tubular member which substantially encloses the probe. Openings are provided in the tubular member to permit a gas flow into the shield past the probe.

Abstract: A vibratory mechanism comprises a motor-driven shaft, a first mass carried by the shaft for rotation therewith, and a variable mass supported for rotation relative to the shaft whereby the angular relationship between the first mass and the variable mass can be selectively adjusted to vary the amplitude of vibration. A drive member is rotatable with the shaft. The variable mass carries a plurality of longitudinally and circumferentially spaced abutment surfaces. The drive member carries a contact face. Engagement between the contact face and the abutment surfaces occurs at different angular relationships between the first mass and the variable mass to vary the amplitude of vibration.

Abstract: A rotary/linear shuttle mechanism, particularly suitable for use in shuttling the carriage of a dot matrix line printer, is disclosed. The rotary/linear shuttle mechanism includes a pair of stiff, thin bands--one long and one short (35,41). The bands are formed of an inelastic material, such as steel or titanium. Each band has a centrally located loop (formed by a necked down portion of the band passing through a window in the band), and a pair of outwardly extending arms. The loop (67) in the long band (35) is wrapped around, and affixed to a motor pulley (33). The pulley is mounted on the shaft of a low inertia motor (31), such as a moving coil type DC brush motor. The ends of the arms (66,68) of the long band (35) are affixed to the periphery of a large diameter pulley (37). The large diameter pulley is mounted on a shaft (75) that also supports a small diameter pulley (39).

Abstract: A novel mechanical power coupling means employable with a novel material compacting apparatus and utilizing either reciprocal or continuous drive inputs with the coupling means. In the preferred compacting apparatus embodiment a reciprocal drive is used such that the compactor is powered by both reciprocating movements of the input shaft. The compactor may be driven in a variety of speed/torque arrangements using the novel coupling means. The coupling means includes a wrapped spring clutch which automatically engages the highest speed mechanical arrangement capable of overcoming the load on the output shaft.

Abstract: An anti-backlash nut assembly is disclosed of the type which undergoes translational movement longitudinally along a screw in response to relative rotational movement between the nut and screw. The assembly includes a nut which is split into first and second portions, both of which have an internal thread complementary to the external thread of the screw. The two portions of the nut are retained in the radial direction by a coaxial cylinder. A spacer means is mounted on the retainer means intermediate opposing surfaces of the nut portions and biased against at least one of said surfaces such that any gap which may occur between the thread of the screw and the thread of the nut will be closed by movement of the spacer.

Abstract: An improved brake lever assembly of the overcenter toggle type is disclosed, wherein the brake operating lever is preferably pivotally connected with the stationary mounting plate assembly about a pivot axis that is laterally displaced from the linear axis of travel of an inner cable member relative to the concentrically arranged tubular outer sheath, thereby to reduce wear of the inner cable guide means. According to an important feature of the invention, an improved anchor plate arrangement is provided for connecting one end of the outer sheath member with one end of the stationary mounting plate assembly.

Abstract: A motor-vehicle steering wheel has a rim, spokes and a deformable member, which occupies part of a bowl space and lies on a recessed hub of the steering wheel. In order to increase the passive safety, the rim of the steering wheel, the outside periphery of the hub of the steering wheel, the spokes of the steering wheel, and the surface of the deformable member are covered with a coherent layer of polyurethane integral skin foam.

Abstract: The invention relates to a control rod or power transmission rod of tubular shape whose ends are provided with bearings and which is formed of continuous fibres or wires coated with resin and wound around internal elements of the bearings. To provide the rod with a high transverse strength, the fibres or wires are wound on the internal elements of the bearings at an angle greater than 180.degree., for example, 270.degree., and intersect each other where they leave these elements, so as to avoid forming a plane of weakness liable to fracture.

Abstract: A connecting rod for the control and/or transmission of force, particularly for use in aeronautical construction, comprises a tubular body formed of high-strength fibres bonded together by polymerized epoxy resin. The body has frusto-conical end portions each surrounding a frusto-conical skirt portion of an end member which is adapted to receive coupling means. A ferrule, also formed of bonded fibres, is provided to tighten each frusto-conical end portion of the body against the frusto-conical skirt portion of the corresponding end member.

Abstract: The transmission has a driving shaft (1) and a driven shaft (9) and a changeover coupling, including a primary part (4) connected to the driving shaft and a secondary part (5) connected to an intermediate shaft (6) with a kinematic connection between the intermediate shaft and the driven shaft. The improvement comprises a first planetary gearing (100), including a rotatable stay (11) connected to the secondary part (5). A second planetary gearing (200) includes a rotatable second stay (19) connected to the primary part (4). A hydrostatic pump (28) having fluid fittings (29, 30) and a drive shaft (27) connected to the second planetary gearing (200). A hydrostatic motor (31) having fluid fittings connected to the pump fittings and a motor shaft (32) connected to the first planetary gearing (100), whereby at normal cruising speeds, the primary and secondary parts of the coupling are directly interconnected, and whereby at slow speeds the primary and secondary parts are disconnected.

Abstract: A drive transmission unit for a motor vehicle incorporates an expansible-pulley stepless speed changer arranged to drive a differential unit via a reduction gear box and a selectively-operable reversing unit. The speed changer has a primary shaft which serves as the input shaft of the transmission unit, and a hollow secondary shaft parallel to, and driven from, the primary shaft. The reversing unit, reduction gear box and differential unit are all epicyclic in form and are arranged in that order side-by-side coaxial with the secondary shaft. Two output shafts connect the differential unit to the half shafts of the vehicle with one of the output shafts passing coaxially through the secondary shaft. This arrangement provides for a very compact transmission unit. The reversing unit can be set in one of three states in which respectively, the secondary and output shafts are arranged to rotate in the same sense, to rotate in opposite senses, and to be drivingly disengaged.

Abstract: A precision rotary indexing fixture is disclosed of the type including a top plate adapted to have work pieces mounted thereon with the work plate indexed to any of a plurality of precision rotary positions. The precision locking of the top plate is achieved by serrated coupling rings, one mounted on the outer periphery of the top plate, the other mating ring mounted on a base structure. The top plate is locked in various index positions by the application of disc spring sets acting on the top plate through an annular piston and a set of bearing elements mounted in opposed grooves in the piston and a race ring mounted to the top plate. The fluid forces acting on the piston acts to release the locking pressure exerted by the disc spring sets and release the coupling serration engagement during indexing of the top plate.

Abstract: The engine is controlled by sensing fuel pedal position, indicative of desire engine power. A characteristic transmission data field is used to select the appropriate gear or gear ratio. The engine is controlled on the basis of characteristic engine data or on the basis of an engine operating curve associated with minimum fuel consumption in dependence of the changes in engine speed due to the changing transmission ratio. In normal driving, the apparatus selects operation along the minimum fuel curve whereas during periods of increased power demand, the apparatus operates in dependence of characteristic engine data. Also proposed is apparatus which takes account of the operational vehicle status and effects the switchover from optimum fuel consumption to optimum power delivery with priority assigned to optimum fuel economy.

Abstract: Two pliers are disclosed which respectively can be utilized to detach and re-attach a plastic radiator header to the header plate of an aluminum radiator. The pliers for detaching or releasing the L-shaped locking tabs of the header plate from the plastic header include a special hook configured jaw adapted to grip and bend separate tabs. The pliers for re-attaching the header plate includes opposed, identical jaws each having a concave arcuate face adapted to engage and close separate locking tabs.

Abstract: A copy paper drawn out from a roll paper is supplied to a copy paper feeding and cutting system in an electrophotographic copying machine or a facsimile device. The copy paper feeding and cutting system includes a paper supply roller for introducing the copy paper into the paper feeding and cutting system, a catching roller for catching the leading edge of the copy paper supplied by the paper supply roller, and a paper holding section for curling the copy paper between the paper supply roller and the catching roller. A cutter is disposed between the paper supply roller and the paper holding section for providing a copy paper of a predetermined length.

Abstract: Sawing apparatus mountable to the side of a tractor and having a boom which extends outwardly from the tractor. The boom carries a motor driven circular saw which is movable along the length of the boom for making a saw cut in a vertical plane parallel to the boom. The apparatus is arranged for movement of the boom, both vertically as well as horizontally in the front to rear direction of the tractor. The angle of the boom to the horizontal is also variable. The boom may be swung over a range of positions about a generally vertical axis and to a position at which it extends in the front to rear direction of the tractor.

Abstract: An arrangement in sawing machines or like processing machines for the forward feeding and infeeding of work pieces, such as logs in particular, to the machine, comprising a stationary saw table which extends parallel to the desired feed line for the workpiece, at least up to the sawing machine, and at least two, individually drivable, endless feed chains which extend in vertical planes parallel with the feed line beneath the saw table. Each of the feed chains is provided with at least one dogging means which moves in a groove in the saw table. The groove is parallel with the feed line and common to all dogging means. The dogging means projects up out of the groove, above the surface of the saw table, in a manner to enable the dogging means to act on the rear end surface of a work piece resting on the saw table, for feeding said workpiece up to and into the sawing machine.

Abstract: A saw chain includes a cutter link having a depth gauge with a rearwardly and upwardly sloping edge, and a guard link having a top edge generally paralleling the bottom of the kerf being cut by the saw chain. The guard link is further provided with a steep forward edge inclined upwardly and rearwardly toward the said top edge, and a rearward edge inclined upwardly and rearwardly wherein the rearward most portion of the guard link adjacent the following cutter link depth gauge is beneath a line extending between the top of the cutter link's cutting tooth and the peak of the depth gauge.

Abstract: A chord generating apparatus of an electronic musical instrument is provided with a selector which selects a single key among a plurality of depressed keys, a detector for detecting a chord type according to types of keys other than the selected key, and a musical tone signal forming circuit for forming a musical tone regarding a chord determined in accordance with outputs of the selector and detector.

Abstract: An ensemble effect is produced in a digital tone generator by providing a master data set of words having values corresponding to the relative amplitudes of equally spaced points along one cycle of a waveform of a musical tone in which the fundamental frequency is deleted. These values are read sequentially and repetitively from a memory to produce a first analog tone. A second analog tone is produced by multiplying a data set corresponding to the fundamental frequency by a low frequency sinusoid. The first and second analog tones are summed to yield a musical tone having an ensemble effect.

Abstract: An improved device for tuning a string of a musical instrument includes a rotatable shaft having one end connected with the string. A pinion gear is connected with the opposite end of the shaft and is disposed in meshing engagement with a worm. The worm is rotatable about its central axis to effect rotation of the pinion gear and shaft with a resulting loosening or tightening of the string. The shaft is held against axial motion by deforming a portion of a housing into an annular groove in the shaft. The shaft is held against sidewise movement by engagement of a cylindrical surface area of the housing with the outside of the shaft.

Abstract: A split E mechanism for flutes having a split G key mechanism is achieved by attaching of a short arm to the F-sharp key in a manner so as to partially overlie an adjacent G-A combination key of the split G key mechanism. According to a preferred embodiment, the arm is soldered to the side of the free end of the F-sharp key at a position such that the adjacent G-A combination key will be closed when the F-sharp key is closed without the G-A combination key interfering with closing of the F-sharp key.

Abstract: A method and device for placing lubricant in a plurality of annular grooves of a projectile is disclosed comprising placing the projectile into a projectile lubricating device, securing the projectile lubricating device to a reservoir containing lubricant, and activating the flow of lubricant to the projectile through the projectile lubricating device.

Abstract: A firing turret which can be oriented about its axis, permitting flat-trajectory or curved-trajectory firing of artillery projectiles. It includes a disc whose central portion includes an opening in the interior of which the cradle of the weapon can pivot; the disc is free to turn within a circular opening provided in the lateral wall of the turret. A turret of this kind may be used to equip an automotive or trailed vehicle.

Abstract: Carried weapon system with a high orientation mobility in elevation and bearing.The elevation mobility is ensured by eliminating the turret and the provision of a shaft in the vehicle superstructure in accordance with its longitudinal axis and the fixing of the weapon to its cradle in said shaft which is open towards the top and front and beneath the weapon towards the bottom. The mobility in bearing is ensured by the self-rotation of the vehicle which displaces the weapon.Such movable turretless weapon system is able to fire at land, maritime and air targets.

Abstract: A throttling valve develops a pressure to bring recoiling parts of a weapon to rest with a constant force. Counter-recoil is provided from recuperator pressure. The throttling valve is biased with a force proportional to the sine of the gun elevational angle to compensate for the gravitational component inline with recoil. Counter recoil force is controlled by a valve that regulates the recuperator pressure available for counter-recoil by an amount that is proportional to the sine of the gun elevation angle.

Abstract: A hydraulic control system with a pipeline antiburst safety device for a double acting drive cylinder, more particularly for adjusting and securing the position of a driven guide roller in the strand guide of a continuous casting plant which exerts an operationally conditioned reaction force, applied by the strand, on the piston of the drive cylinder.

Abstract: A considerable reduction in weight of a brake booster is achieved in relation to conventional brake boosters by disposing a tube or pipe coaxially in the vacuum housing and connected to both end walls of the vacuum housing. According to the present invention the overall length of brake booster is reduced and the assembly thereof is easier. This is accomplished by constructing the force transmitting elements between the movable wall and the control housing as ring segments which are rigidly fastened to the movable wall on the vacuum chamber side thereof and engage radial indentations at the adjacent end of the control housing.

Abstract: A rotary plug steering valve of the worm gear type for auxiliary power steering of motor vehicles is provided with a rotary plug valve and a coacting valve sleeve including means for flow passage of return hydraulic fluid to a servomotor via an inner ported sleeve disposed within the valve plug, which sleeve also serves as an alignment and bearing member for the valve plug. The advantage achieved by thus providing additional serial flow control edges between the rotary plug and a return connection via the inner sleeve is the reduction of hissing flow noises in steering operations, by a throttling of return oil flow during the relative rotation of the valve plug and the inner sleeve. This reduces the cross section of return oil flow passage, but causes no throttling in neutral position of the valve for straight ahead steering when respective passages of the valve plug and inner sleeve are in full register.

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions, a pump for supplying fluid to said actuator, pilot operated meter-in valve means to which the fluid from the pump is supplied for controlling the direction of movement of the actuator, pilot operated meter-out valve means associated with each opening of the actuator for controlling the flow out of said actuator,and means for sensing a predetermined drop in a line supplying fluid to one opening of the actuator caused by a runaway load in one direction and operating the meter-out valve means to interrupt flow out of the other opening of the actuator.