Abstract: An improved occupant weight detection system measures the pressure in a fluid-filled bladder disposed in or under a foam seat cushion as an indication of occupant weight, and periodically adjusts the pressure vs. occupant weight relationship to compensate for changes due to aging and usage of the foam seat cushion. The system controller develops an aging adjustment value based on a measure of the cumulative aging and usage of the seat, and uses the developed adjustment value to compensate the operation of the system. The aging adjustment value is determined primarily as a function of occupant weight and time of seat occupancy, and the compensation is achieved by using the aging adjustment value to adjust either the estimated weight, or a threshold to which the measured pressure is compared for purposes of deciding if restraint deployment should be enabled.

Abstract: An improved method of producing a fluid filled elastomeric bladder for occupant weight sensing involves annealing the bladder material prior to its installation in a vehicle seat so as to quickly relieve initial stress due to stretching of the bladder material which occurs during fluid injection. In a preferred implementation, the initial stress is relieved by immersing the fluid-filled bladders in heated water for a time period on the order of 60 seconds or more. Alternatively, the bladder material may be heated with steam or radiant heat, by injecting heated fluid into the bladder, or by injecting heated air into an empty bladder before fluid injection. In each case the initial stress is quickly relieved, substantially eliminating a potential source of error in the sensed weight.

Abstract: The invention relates to an apparatus for manipulating in the height and in particular setting down of a load. The apparatus comprises a suspension on a lifting device, which suspension comprises a drive, with which drive the load can be manipulated in the height; a weighing device with which the weight of the load can be determined; a memory connected to the weighing device for storing an initial weight of the load; and comparing means for comparing an actual weight with the initial weight stored in the memory for the purpose of selective energizing of the drive in response to the comparison.

Abstract: A hydrostatic weight sensor comprises a bladder of flexible material that contains a fluid, preferably in an amount less than the capacity of the bladder when the bladder is unloaded, the pressure of which is sensed by a pressure sensor so as to provide a measure of weight upon the bladder. The bladder is mountable within a seat below the seat cushion and above the seat base, wherein seating loads are distributed across the bladder by the seat cushion and the seat base. In one embodiment, the bladder comprises a plurality of sheets of flexible material that are sealably connected to one another along a periphery, and are further connected to one another at one or more locations within the periphery so as to create a plurality of fluid containing zones that are in fluid communication with one another.

Abstract: A plurality of pneumatic hydrostatic weight sensors, each incorporating a fluid and a pressure sensor for sensing the pressure thereof, are incorporated in series with the load path within a vehicle seat to sense occupant weight. A signal processor measures the pressure within each pneumatic hydrostatic weight sensor and the weight of the occupant from the signal generated by the associated pressure sensor, and compensates for the effects of ambient pressure or temperature on the weight measurement responsive to the difference in pressure between the associated pressures of two of the pneumatic hydrostatic weight sensors.

Abstract: A hydrostatic weight sensor element incorporates a volume restorer for restoring the volume thereof when the applied load is removed therefrom, whereupon a check valve in fluid communication therewith admits sensing fluid thereinto if the pressure of the sensing fluid within the hydrostatic weight sensor element is less than local atmospheric pressure, so as to replenish lost sensing fluid. The volume restorer may comprise either the seat cushion, operatively coupled to the load bearing surfaces of the hydrostatic weight sensor element, or an elastic medium incorporated within the hydrostatic weight sensor element, whereby the volume restorer is adapted so that the restored volume of fluid is less than the volume capacity of the hydrostatic weight sensor element. A pressure relief valve is provided for releasing sensing fluid so as to prevent damage from overload conditions.

Abstract: A device and method are described for measuring the weight of objects using a pneumatically sealed bellows which contains a pair of spaced apart capacitor plates. In accordance with the invention, the pneumatic pressure within the bellows is varied to maintain constant dimensions for the bellows and a constant distance between the electric capacitor plates. This pressure is therefore a function of the weight placed upon the bellows which exerts a pressure tending to force the walls of the bellows and the capacitor plates closer together thereby changing the electric capacitance between the capacitor plates. By adjusting the pneumatic pressure to maintain a constant electric capacitance and constant dimensions for the bellows, a convenient parameter is obtained from which the weight of objects placed on the bellows can be measured. The invention has particular application in the meteorological sciences.

Abstract: This invention provides an apparatus and a method of using the apparatus to determine the weight of a load which is supported on a frame. In a preferred use of the invention, the load is supported on a tilt frame which is itself supported on the chassis of a transport means, such as truck.The apparatus of this invention comprises a combination of a hydraulic system for lifting the load and a load sensor for sensing the weight of the load lifted, wherein the full weight of the load to be weighed is simultaneously transferred to the load sensor as the hydraulic system lifts the load, while the entire load continues to be carried by the frame.The invention still further comprises electronic means for converting the sensed weight to digital terms and means for mathematically manipulating, storing, and displaying the sensed weight for immediate and subsequent purposes.

Abstract: A golf club swing weight scale includes dual weighing scales arranged to provide for the simultaneous measurement of both the total weight and the swing weight of a golf club or other object. The device may include weight scales using either electronic load cells or strain gauges, hydraulic or pneumatic pressure measurement, or mechanical operation, as desired. The scale also includes a weighing pan providing for the weighing of various separate components, as well as providing for the retention of a golf club thereon to determine the total and swing weight thereof. The device also includes stops to preclude excessive oscillation of the weighing pan and club retainers, as well as a golf club or other article placed thereon, during the weighing operation, thus reducing the time required for the scale to come to a rest position.

Abstract: A weighing system for obtaining the mass of objects, particularly spent nuclear fuel rods, includes a weighing device having a weighing platform on which objects to be weighed are placed. The platform rests on three hydraulic load cells, each communicating with an associated pressure transducer. Electrical signals from the transducers representing the pressure in the load cells and, consequently, the mass of the objects, are converted into digital form by a convertor and then processed by a computer to calculate the required mass values. The weighing device is located within a radioactive environment existing in a shielded enclosure, the transducer and the signal processing means being situated outside the enclosure and remote from the radioactive environment.

Abstract: A pressure transducer module includes a plurality of cavities, each cavity in fluid communication with a hydraulic load cell. Each cavity deforms with variations in the pressure of the hydraulic fluid in the cavity. Sensors generate output signals representative of the deformation of the cavities. The sensor output signals are digitized and multiplexed, whereby the transducer module generates a digital output data stream. The pressure transducer module is pre-calibrated for creep, hysteresis, non-linearity and temperature related errors. A computer controller stores the calibration data for the module. The pressure transducer module also includes a temperature sensor. A weighing system includes a weighing platform or structure; at least one pressure transducer module; and hydraulic transducers for measuring the load applied to the weighing platform or structure. A controller receives the outputs of the sensors and applies the calibration data to calculate the weight of the load on the platform.

Abstract: A gauge for monitoring the propane content of a propane-containing vessel includes a platform member telescopically disposed above a base member to define an intervening region. A piston and a cylinder, interactively disposed within the intervening region upon a vertical axis form a fluid-impermeable chamber within the cylinder. A fluid is confined within the chamber and communicates by way of a conduit with a pressure-indicating device. Pressure generated upon the fluid in the chamber by virtue of the weight of a vessel resting atop the platform member is sensed, and indicated in terms of pounds of weight by the pressure-indicating device.

Abstract: A microwave oven is provided with a weighing device comprising a plate having a vertically movable shaft, and a fluid-containing bladder or a fluid-containing piston and cylinder assembly, and a pressure sensor for sensing the weight of a food product to be cooked in the oven. The problem residing in that the electronic components included in prior-art weighing devices are placed in an unsuitable environment under the cavity bottom of the oven is solved by placing the electronic components on a circuit board for the remaining control electronics in a space separate from the space under the cavity bottom. This solution means that the vertically movable shaft generates a pressure change in the bladder or the piston and cylinder assembly. This pressure change is transmitted to the pressure sensor, which generates a weight-indicating signal.

Abstract: Apparatus for processing materials including a receptacle for containing and processing fluid materials such as animal feed. A frame supports the receptacle on a base surface. A weighing mechanism supports the frame and includes at least one member yieldable proportionally in response to the weight of materials contained in the receptacle. An arm connected to the yieldable member is movable in response to its movement. An enclosed collapsible container or bellows having circumferentially corrugated cylindrically-shaped sidewalls and first and second closed ends has a first end being supported by a fixed support. The second end is aligned with, and movable in response to, movement of the arm. A conduit in fluid flow communication with the interior of the collapsible container is at its other end visually transparent, vertically aligned, open to the atmosphere, and contains a liquid.

Abstract: A device for measuring the amount of fluids absorbed by surgical sponges. The sponges are placed in a receiving cylinder. A flexible diaphragm at the bottom of the cylinder flexes or deflects from the weight. This deflection displaces a fluid in a base unit. The fluid is displaced into a graduated cylinder. The cylinder is graduated in simple volume units or can include compensation for the sponge weights. A counter is included which allows the number of sponges being measured to be counted.

Abstract: A measurement device (10) is disclosed that uses the actual hydraulic cylinders of the aircraft landing gear to weigh the aircraft. The device (10) comprises a pressure-weigh sensitive transducer (12) with a flow-through passage (14) and adaptors (20a, 20b) to attach the device to the standardized service valve on the aircraft landing gear. The transducer (12) measures the pressure in the landing gear's hydraulic cylinder. This measurement signal is converted into an aircraft weight and center of gravity location. These determinations are displayed on a converter/display (50). The transducer (12) has a flow-through passage (14) to allow servicing of the landing gear's hydraulic cylinder.

Abstract: Methods and apparatuses, in one aspect, for detecting and indicating loads and/or forces on tubular strings, e.g. tubing, injected into or withdrawn out of a well by an injector apparatus, the apparatus having, in one embodiment, a single piston acting on a single boot with a chamber therein having a fluid the compression of which in response to a load or a change in load is sensed to indicate the load on the apparatus; the indicator in one embodiment having a spring to add to the weight of the injector apparatus to provide a positive pre-load so that negative loads can be determined by a change in positive pressure without requiring negative pressure; and a pressure chamber device for use with such apparatuses and in such methods.

Abstract: A portable weight measuring device including a plurality of flat, flexible generally nonelastic fluid-containing bladders arranged edge to edge and interconnected by flexible tubes for fluid flow between the bladders. Flat, rigid upper and lower support plates, generally similar in size to each bladder, are positioned against each bladder upper and lower surface so that the upper support plates collectively define a flat weight bearing surface and the lower support plates collectively define a flat ground engaging surface which is parallel and spaced from, but on close proximity to, the weight bearing surface by the relatively small thickness of the bladders.

Abstract: Weighing scales for use as a teaching aid in educational establishments. The scales include a platform adapted to receive an article to be weighed, a compressible, fluid-containing reservoir, in the form of bellows or diaphragm provided with a fixed wall. The scales are provided with display means which are in fluid communication with the reservoir. The display means is a transparent flexible tube adapted to display the volume of fluid displaced in response to the article being placed upon the platform.

Abstract: A weighing scale of the type comprising a scale is disclosed wherein the weighing scale is table for bearing the thing to be measured; a first hydraulic cylinder disposed below the scale table; a feeler transmitting the pressure applied at the scale table to the first hydraulic cylinder; a second hydraulic cylinder connected to the first hydraulic cylinder by a pipe and disposed at a level below the first hydraulic cylinder to bear the pressure transmitted through the feeler; a probe forced to make a linear displacement corresponding to the amount of the pressure transmitted from the first hydraulic cylinder to said second hydraulic cylinder; and an electronic inductor to detect the range of the linear displacement and convert it into a corresponding digital data for display.

Abstract: A Bourdon's pipe that includes a clamping member at its sealed end. A threaded hole is bored through the clamping member into which a first bolt with a head is threaded whereat the head sealingly abut against the clamping member. The first nut has a passage including a constricted section with open end communicating with the interior of the Bourdon's pipe, and a valve seat adjacent to the constricted section. A movable ball-shaped valve is provided in the passage of the first bolt. A second bolt threaded into the passage of the first bolt to adjustably abut the ball-shaped valve against the valve seat.

Abstract: A motion control system for hydraulically operated lifting devices. The system provides for the dynamic weighing of a loaded container by controllably directing hydraulic flow through a bypass chamber of a two-way valve. An analog output signal is generated by a hydraulic pressure transducer fluidly communicating with the two-way valve or by a tensiometer mounted on the arms of the lifting device. The two-way valve further provides a second bypass chamber which receives fluid under gravity from the lift circuit line of the hydraulic cylinder for controllably lowering the lifting device. The pressure transducer or tensiometer generate an analog signal proportionate to the weight being lowered and whereby the hydraulic fluid is returned to the reservoir of the hydraulic system independently and downstream of the main operating valve.

Abstract: A weighing scale includes a hollow casing having a lower base and an upper covering for support an object. A pressure gauge mounted to the base includes an indicator, and a hydraulic pressure sensor connected to the indicator and actuating it in response to a sensed pressure produced by the weight of the object. Four spaced fulcrum posts are mounted to the base. A lever mechanism includes a rear one-piece rod and a pair of spaced front rods respectively and pivotably mounted to the four fulcrum posts. The rear one-piece rod includes a force exerting plate resting on the hydraulic pressure sensor. A transmitting frame provided between the covering and the lever mechanism includes a pair of spaced rods and a connecting rod mounted between the spaced rods which are pivotably mounted to the lever mechanism.

Abstract: A weighing device includes a housing disposed on an upper end of a post, a displayer disposed on the housing, a piezoelectric element disposed in the housing and having one end located above the opening of the housing, an air bag disposed on a base, a tube coupled to the post and connected to the air bag, and an expandable member disposed on an upper end of the tube for pushing the piezoelectric element when an object is put on the air bag. A signal corresponding to the weight of the object is generated and displayed on the displayer.

Abstract: The instantaneous load sensor of a motor vehicle is incorporated in a suspension assembly of the vehicle, and comprises a suspension element (1) fastened via an elastic mechanism (3) to a rod (5) carried by a yoke (7). The rod (5) is a blind hollow tube, in which a slot (12) has been made substantially in the axis of the suspension element (1) and opposite the latter, so as to allow the elastic mechanism (3) to penetrate into the tube (5), a sensor (10) of the pressure prevailing in the tube hermetically closing the open end of the tube.

Abstract: An apparatus for generating a signal, dependent on the weight of an object, is provided for an air-suspended vehicle. Control processes of the air-suspended vehicle with automatic levelling control unit correct road conditions, such as, for example, curve inclinations, influencing the suspended weight. According to conventional apparatuses, the suspended weight is determined by the measurement of the pressure in the air suspension. This requires additional measurement and signal transfer means. The invention apparatus is to generate a signal corresponding to the suspended weight under use of the distance values stored in the automatic levelling control unit. The automatic levelling control unit (8) is structured such that it generates during automatic control an additional signal, dependent on the temporary change of the distance value. The additional signal serves as the signal dependent on the suspended weight.

Abstract: In a method for weighing a patient lying on a bed, an air mattress is put beneath the patient. Then, a flowing air is supplied to or discharged from the air mattress so as to balance the weight of the patient with a pressure of a body of air contained within the air mattress. At this time, the amount of the flowing air is measured together with variation of the pressure of the body of air contained within the air mattress, so that a relationship between the amount of the flowing air and the variation of the pressure of the body of air contained within the air mattress is established. Consequently, the weight of the patient may be calculated on the basis of the relationship between the amount of the flowing air and the variation of the pressure of the body of air contained within the air mattress.

Abstract: An hydraulic bypass control system for tapping off the lift circuit of an hydraulically operated lifting device. The bypass control system slowly releases hydraulic fluid from the lift circuit and directs it back to the reservoir in a controlled manner so a load is smoothly moved from a reference position to a weighing position. Reliable weighing may be obtained by avoiding dynamic shaking, vibration and pressure surges, which permits the weighing step to be reliably made at the same point or range and affords precise calibration of a load transducer with a weighing instrument to be made.

Abstract: A hydraulic bypass control system for tapping off the lift circuit of a hydraulically operated lifting device. The bypass control system slowly releases hydraulic fluid from the lift circuit and directs it back to the reservoir in a controlled manner so a load is smoothly moved from a reference position to a weighing position. Reliable weighing may be obtained by avoiding dynamic shaking, vibration and pressure surges, which permits the weighing step to be reliably made at the same point or range and affords precise calibration of a load transducer with a weighing instrument to be made.

Abstract: An hydraulic bypass control system for tapping off the lift circuit of an hydraulically operated lifting device. The bypass control system slowly releases hydraulic fluid from the lift circuit and directs it back to the reservoir in a controlled manner so a load is smoothly moved from a reference position to a weighing position. Reliable weighing may be obtained by avoiding dynamic shaking, vibration and pressure surges, which permits the weighing step to be reliably made at the same point or range and affords precise calibration of a load transducer with a weighing instrument to be made.

Abstract: Objects to be inventoried are positioned on a series of platforms for weighing. Each platform, which may be a storage shelf, is supported on a piston operating in a fluid pressure cylinder, either hydraulic or pneumatic. On signal from a computer-controller, fluid is pumped through a common conduit into all cylinders simultaneously, steadily increasing the pressure on each cylinder piston. When the pressure reaches the point of balancing the combined weight of any one platform and the objects resting thereon, a signal is generated to report that balancing pressure value to the computer, at the same time causing the corresponding cylinder to be deactivated. Pumping of fluid continues until all platforms in the system have registered balancing pressure values into the computer.

Abstract: A weight and pressure measuring device, comprising a fluid filled cushion pad of limited volume, connected to a pressure indicator to measure the pressure produced during pressure loading. Such a measuring device requires little space, is lightweight, and can easily be transported and used. A blood pressure and weight measuring device has an inflatable sleeve which is connected through a tube connection, with a pump device and a pressure measuring device. In order to measure blood pressure as well as weight, by means of such a measuring device, a second inflatable device, with a limited volume, is connected with the pressure measuring device and the pump device. The device measures the pressure produced by the weight load, which is proportional to the weight being determined.

Abstract: A load-sensing body for weighing machines and the like, comprising two circular plates (1, 2) and an intermediate space (15) communicating with a pressure-sensing member, an O ring-type seal being arranged between the plate circumferences, and one plate being provided with at least two open grooves (11, 12) in the opposing plate sides, the grooves being arranged at a slight radial distance from one another and facilitating axial displacement of a central plate portion disposed inside the grooves upon axial compression of the plates.Elastically yieldable portions are arranged in the load-sensing body to act between the body and loading and/or load-receiving elements for the purpose of allowing initial compression of the plates to prevent for an initial compression of the seal and subsequently allow direct load transmission to the load-sensing body.

Abstract: A scale utilizing an oil pressure gauge for displaying the measured weight is disclosed. In the scale, there is an apparatus for intermediate transmission of sensed pressure representing the weight applied on the scale. The apparatus includes a bellows-shaped envelope having an open end and a sealed end and forming a chamber therein for containing hydraulic oil, a base member connected to the open end of the envelope and an air leakage member positioned on the sealed end of the envelope. There is an oil passage formed in the base member to enable the hydraulic oil in the envelope to flow out. An annular clamp is used for the connection of the base member and the envelope. A knob is connected to the air leakage member to block the air passage. The apparatus for intermediate transmission of sensed pressure may further include a plurality of rigid metal retainers outside of the envelope for preventing the same from overly deforming in a radial direction.

Abstract: A platform type weighing scale wherein an upper surface of a casing constitutes a weight bearing platform and wherein at least three foot elements extending out of a base surface of the casing and capable of limited displacement in directions into and out of said casing co-act with at least three counterbalanced, weight transmitting levers.

Abstract: A load cell apparatus especially suitable for detecting and indicating loads on tubing injected into or withdrawn out of a well with an injector apparatus. The load cell apparatus is located longitudinally directly below the injector apparatus to avoid angling of the tubing as it is run into, or pulled out of, a well. Two gauges are provided to independently indicate positive and negative loads on the tubing and to facilitate determining whether the pipe has hit an obstruction in a well. A fluid chamber is provided to support the weight of the tubing head, facilitating accurate load cell readings.

Abstract: A bathroom platform scale is disclosed having a reinforced plastic base and platform. The platform is carried by a pair of triangular-shaped actuation levers which directly engage a single transducer, such as a strain gauge, centrally located in the base, to sense the weight on the platform. Such an arrangement allows for a relatively compact scale. The triangular-shaped levers are supported by knife edge bearings which define a fulcrum. An integrally formed tongue extending from an apex from each of the triangular-shaped levers applies the weight distributed on the platform to the transducer. The triangular-shaped actuation levers are also self-aligning, thus facilitating assembly of the scale.

Abstract: A load cell apparatus especially suitable for detecting and indicating loads on tubing injected into or withdrawn out of a well with an injector apparatus. The load cell apparatus is located longitudinally directly below the injector apparatus to avoid angling of the tubing as it is run into, or pulled out of, a well. Two gauges are provided to independently indicate positive and negative loads on the tubing and to facilitate determining whether the pipe has hit an obstruction in a well.

Abstract: A weight scale for a loader operated by a hydraulic system incorporated in equipment and a related method are provided. The scale includes a pressure gauge installed in a hydraulic line of the hydraulic system. The gauge may either be located at a loader boom or the tractor instrument panel. The gauge includes an adjustable pointer to correspond the gauge to the tare weight of the particular loaded it is applied to; a calibration factor which allows the operator to convert from the pressure reading on the gauge to a weight value in pounds or kilograms; and a safety line for warning the operator when the safe load limit of the loader is being surpassed. The method includes the steps of: lifting an object on the loader; sensing the pressure exerted in the system by the gauge when the object is lifted by the loader; displaying the pressure; and converting the pressure displayed to a weight value based on the predetermined calibration factor.

Abstract: A flexure assembly is provided for mounting a load-receiving platform to a fixed base, said base having associated therewith a force sensing device for coupling to said platform. The assembly comprises at least one flexure member including a stack of at least two flexible leaves. The stack is rigidly coupled along a first side thereof to said platform, and said stack is rigidly coupled along an opposite side thereof to said base, said stack being inclined from the vertical and being sufficiently rigid to support said platform from said base.

Abstract: A weighing apparatus includes a liquid container which is of a variable volume. An transparent press plate is fixed on the upper surface of the liquid container. The top surface of the press plate has weight indexing marks which are indicated in a vortex-like arrangement. The liquid container can be pressed by the press plate to discharge liquid from the liquid container. A transparent, thin hose has an open end communicated with the liquid container, and a closed end positioned just under the indexing marks of the press plate in such a manner that the closed end of the hose is self-wound in a vortex-like arrangement. When the press plate is not pressed, a portion of the hose is gripped by a holding mechanism to prevent the discharged liquid from flowing back into the liquid container.

Abstract: Containers such as liquefied gas cylinders are weighed in situ using a balance comprising a pneumatic actuator connected between a support temporarily installed above a container to be weighed and the container itself. Gas pressure is applied to the actuator to lift the container off the surface on which it is standing, and the pressure required to hold it off that surface is measured to indicate the weight of the container. A limiting valve is associated with the actuator so as to limit pressure therein to that required to lift the container.

Abstract: The wheel loading balance has a platform (1), of which one side (13) is, by a first pair of tibs (2), supported for horizontal movement on a first lever member (4) while the opposite side (14) is supported for horizontal movement on a second lever member (5) by a second pair of ribs (3). The two lever members (4, 5) are connected to each other pivotally and in such a way as to be secured against mutual displacement by a spring steel plate (33), being rotatably and horizontally movably mounted in a base (6) (38 to 41) at their remote ends (36, 37). One of the two facing ends of the lever members is rigidly connected to a pressure transmitting member (7) while the other is rotatably supported thereon (31,32). The pressure transmitting member (7) loaded by the lever members lies freely on a diaphragm (23) of a pressure force measuring cell (8) which together with a weight indicating pressure gauge and a connecting line (25) forms a component assembly which is exchangeably mounted in the base (6).

Abstract: An improved hydraulic load cell is provided comprising a base, a sealing means, a cylinder comprising a ring member welded to the base and a cylinder tube member welded to the ring member, and a piston comprising a plate welded to a piston member, the piston being positioned inside the cylinder. Also provided is a self-centering column comprising means for tending to recenter the column in response to a lateral displacement.

Abstract: A method for measuring the weight of a load loaded in a vessel of a vehicle such as, for example, a large-sized dump truck comprises steps of detecting the axial force applied to each of suspension cylinders mounted between the vehicle body frame and axles, and then compensating or correcting the detected axial force in accordance with respective mounting angles of links of linkage mechanisms mounted in the periphery of the axle and the inclination angle of the vehicle body. An apparatus for carrying the method into practice has at least four sets of suspension cylinders, an inclination angle detector mounted on the vehicle body frame, pressure sensors each being mounted on each of the suspension cylinders, a calculation or arithmetic unit adapted to receive and calculate output signals transmitted by the inclination angle detector and the pressure sensors, and a display unit adapted to receive a signal indicative of the result of calculation transmitted by the calculation or arithmetic unit and indicate it.

Abstract: Disclosed is a method and apparatus for measuring the density of a liquid, such as a drilling mud, by continuously flowing a sample of the liquid through a container having a fixed predetermined volume. The container is supported by at least one bed of pressurized fluid. The pressure of the fluid is varied in response to fluctuations in the weight of the liquid sample in the container. A pressure transmitter monitors the pressure level in the bed and produces a signal indicative of the density of the liquid sample.

Abstract: A scale device is provided, which can be used in the floor of a truck, trailer or fixed structure, in which it is desired to obtain the weights of various items placed on the floor, and includes one or more retractible pneumatic scale assemblies to selectively engage the items and record their weight, and which includes load responsive members to weigh the items.

Abstract: A weighing tool and method for determining the weight of ice contained within each of a plurality of ice baskets received within corresponding compartments of a lattice frame, as employed with nuclear power generators. A cylinder body includes lug support frames and corresponding lugs movable to retracted positions for inserting the weighing tool within the upper end of an ice basket, and to extended positions for being engaging in the ice basket and securing the tool thereto. A piston movable in sliding relationship within the body and defining upper and lower compartment therein is secured through a piston rod to a support bar which rests on the lattice frame and spans the compartment. Hydraulic fluid under controlled, increasing pressure is introduced into the upper compartment, driving the cylinder body upwardly relatively to the stationary piston so as to raise the ice basket. The pressure necessary to lift the ice basket provides a measure of the total weight of the ice basket.

Abstract: Fluid density measuring apparatus and method for directly measuring fluid density or indirectly measuring force, acceleration, flow velocity, differential pressure and other parameters affecting the apparatus. The apparatus includes a bellows and a generally rigid hollow housing having openings through which fluid may flow to the interior of the housing, and a vibratory single-ended tuning fork mounted in the housing. The apparatus also includes circuitry for causing the tines of the tuning fork to resonate, for example, 180 degrees out of phase in a transverse direction, with the frequency of the tines varying with variation in the density of the fluid surrounding the tines. Circuitry is also included for determining the frequency at which the tuning fork tines resonate. When the density of the fluid into which the housing is placed changes, the frequency of vibration of the tines of the tuning fork is caused to change to provide a measure of the density change.

Abstract: An apparatus determines the payload carried in a work vehicle by periodically measuring the pressure of a fluid contained within front and rear suspension struts. The struts are connected in supporting relation between a load carrying portion and a ground engaging portion of the vehicle such that a pressure differential between a loaded and unloaded vehicle can be shown to be indicative of the magnitude of the payload. Moreover, the pressures are a function of the geometry of a suspension means which interconnects the load carrying portion and the ground engaging portion.