Abstract: In a freezing agent consumption measurement system for measuring the consumption of the freezing agent in a low-temperature container, due to evaporation of the freezing agent, including a gas flow meter provided in the gas flow path to measure the flow of the evaporated gas from the freezing agent, a tank is provided in the gas flow path means, and the pressure in the tank is maintained at a predetermined value. The measurement of the flow of the gas is not affected by the variation in the atmospheric pressure, and accordingly accurate measurement of the consumption of the freezing agent is accomplished.

Abstract: The integrated multifunction regulator station for gas supply to secondary user mains from a principal distribution mains, comprises a single external housing having an essentially cylindrical shape, designed to withstand the gas operating pressure, in which are contained active elements including at least a filter, a pressure regulator and a safety valve.A flow meter and the pressure regulator are mounted on a traversal wall. The filter is formed from a cylindrical cartridge located between a removable bulkhead and the pressure regulator, which is itself mounted on the tranversal wall. The safety valve is mounted on the removable bulkhead and includes a safety valve head located upstream of the pressure regulator, at a to part of the latter, and inside the cylindrically shaped cartridge.

Abstract: An apparatus for shielding and protecting an air flow rate meter from air column fluctuations arising in an intake tube from the aspirating action of an internal combustion engine is proposed. An air flow rate meter is disposed in a bypass line around the intake tube, and downstream of the air flow rate meter and in its vicinity there is a damping chamber, which communicates with the bypass line and keeps air fluctuations from affecting the air flow rate meter.

Abstract: An active attenuation system is provided for attenuating the pressure pulses in a liquid flowing in a pipe. The system includes an actuator for introducing nulling pressure pulses into the pipeline having the same frequency, but phase reversed to provide opposite amplitude of the pressure pulses to be attenuated. A plurality of pressure sensors are disposed in the pipe to sense the pressure pulses to be attenuated and these sensors are connected to a pressure transducer amplifier system which, in turn, is electrically connected to a control monitor which adaptively models the responses and continuously adjusts its output to a power amplifier which, in turn, signals the actuator to produce nulling pulses at the desired frequency and amplitude to attenuate the pressure pulses at a desired location, i.e. headbox or pipeline termination, in the liquid flowing through the pipe.

Abstract: A system for generating electrical signals which are intended to control a flow limiting device, in particular in a fuel control apparatus, has duplicate signal generating circuits which are responsive to operation of the fuel control apparatus and which generate nominally indentical output signals when an operating condition of the fuel control apparatus exceeds predetermined limits. Output signals from the duplicate circuits are supplied to the limiting device by way of respective control circuits each of which is enabled by the presence of a corresponding output signal from the other of the signal generating circuits. A device is provided for detecting a malfunction of one of the signal generating circuits and for permanently enabling the control circuit.

Abstract: A converter of the rate of flow of a fluid is disclosed with a measuring chamber having a smooth internal outer surface and a cylindrical casing, disposed in the base of the eternal casing of the converter. An inlet chamber of a damper is formed from the side of a flexible membrane in the converter. Between the cylindrical casing and the base of the external casing, a free (clear) annular space is provided. On the external wall of the first half of said chamber there is a hole, while on the external wall of the other half of said chamber there is a compensation hole disposed in front of the tangential inlet of the cylindrical measuring chamber. A turbine wheel, disposed inside the chamber, has flat rectangular blades. In the axial outlet of the cylindrical measuring chamber, a guiding element is disposed with bottom and top transverse bases having the shape of circular sectors.

Abstract: A digital readout and display adapted for use with a tank of oxygen under pressure provides pressure regulation, discerning of the pressure in the tank and consumption of the oxygen. A small battery within a case member powers this display. The readout device includes a gauge with a movable element responsive to pressure. An S-shaped rod is carried by and fixed to this shaft. This rod is very light in weight and in a secured condition is free at both ends to prevent friction of moving parts. The discharge end of this light-conducting rod comes in way of a light receiver carried by the body of the gauge. There is a multiplicity of receivers arrayed in a circular pattern near the edge of the gauge body and the light from this rod actuates a reed switch which sends an electrical signal to a microprocessor thence to an LED digital display. A single emitter may be used to send light through three rods each of which is carried by a gauge-type device.

Abstract: In a flow rate control apparatus, pressure of a primary, or controlled, liquid is reduced without application of shear forces thereto. Each of first and second piston and cylinder assemblies has a first port on one side of the piston and a second port on the other side. A secondary fluid path between the two second ports contains a controlling fluid directed through a pressure reducing valve. The rate of flow of the primary fluid from the discharge cylinder is controlled by the rate of flow of the secondary fluid through the pressure reducing valve. A four way valve couples the controlled liquid at relatively high pressure through the first port in a first cylinder, and the controlled liquid is discharged at relatively low pressure from the first port in the second cylinder. The first and second pistons are rigidly connected to assure synchronized motion and accurate metering of the controlled liquid and to provide for driving of both pistons in response to input pressure of the controlled liquid.

Abstract: An apparatus for regulation feed for gas consumption from a source with a variable gas production. The apparatus is characterized by two chambers (1, 2). These communicate in their lower parts with each other. At least the first chamber (1) is closed in its upper end. The lower part of the chambers (1, 2) is provided with a gas inlet (3) from said source for gas production and a gas outlet (5) to said consumer. In the second chamber (2) there is provided a means (15) regulated by the liquid level for starting and shutting off the gas consumer.

Abstract: A bypass valve assembly is disclosed for use with a fluid flow meter of the type having a housing, an inlet, an outlet, a fluid passage which fluidly connects the inlet to the outlet and a flow rate responsive member within the fluid passage. The bypass valve assembly comprises a tubular body open at one end in which is secured to the flow meter housing so that the open end of the tube registers with the flow meter inlet. A valve member is contained within the tube and is urged to a closed position by a helical spring. In its closed position, the valve member directs all of the influent to the flow meter through the passage. When the fluid flow rate into the flow meter exceeds a predetermined amount, the valve member moves to an open position against the force of the helical spring thus bypassing the influent directly to the flow meter outlet.

Abstract: An apparatus for creating gas flow cycles comprises a housing defining a chamber (80) provided with gas functions and a passage (76) for connection with an equipment to be tested. A unit movable in the housing throttles the passage. The position of the unit (75) is controlled by electrical signals received from a control unit. Sensors supply electrical signals representative of the position of the mobile assembly and of the pressure. The junctions are provided for connection with gas sources at different pneumatic pressures through solenoid valves.

Abstract: In a suction system in an engine a suction air volume detecting means utilizing a von Karman's vortex air flowmeter principle has its upstream side and downstream side being in communication with an air cleaning chamber and an expansion chamber, respectively, with a vibration membrane being disposed therebetween, whereby the influence of the pulsating suction air on the suction air volume detecting means is effectively suppressed so that it operates stably.

Abstract: A device and method for preventing high pressure surges in fluidic material delivery systems to instruments such as a flowmeter, by the use of restrictors and a pilot operated valve to initially restrict the flow of the fluidic material before allowing total delivery thereof to prevent damage to such meters and other type members.

Abstract: Disclosed is a method and apparatus for measuring and controlling volumetric flow rate of gases. The apparatus includes a measurement chamber of fixed volume in a flow line, a controllable inlet valve upstream from the chamber, and flow regulator means for establishing constant flow output downstream from the chamber. Also provided are measuring and control equipment including a pressure sensor in the chamber, means for controlling operation of the inlet valve, timing means, and means for calculating volumetric flow rate. The method involves closing the inlet valve at a chosen time for a selected interval, to interrupt flow into the measurement chamber, while maintaining constancy of flow out of the chamber. During at least part of the interval in which the inlet valve is closed, the pressure decrease is measured, and the rate of pressure decrease is calculated by dividing the measured pressure drop by the time measured by the timing means.

Abstract: A pneumatic conveyor for powdered to granular bulk material, having adjustable conveyance capacity, is disclosed, the capacity being adjusted by electromagnetic adjustment of a pressure regulator disposed in a conduit used to supply a propellant for drawing the bulk material from a storage container thereof and for conveying it. A supplemental supply of gas, which may be but need not be different from the propellant gas, may be provided to control the flow of propellant gas independently of the first pressure regulator. In this case, the flow of the supplemental gas may itself be controlled by a second pressure regulator. The pressure regulators operate according to the diffuser or Venturi principle. The device may be particularly advantageously applied to the spray-coating of articles with a bulk material.

Abstract: Apparatus for detecting a rate of pressure rise in a pipeline higher than an acceptable level, comprising a monitor conduit which is connected between the pipeline and a monitor chamber of uniform cross-section with a spring-biased piston or diaphragm therein. The invention contemplates means for producing a signal proportionate to the flow through said monitor conduit and, hence, to the rate of pressure change in the pipeline. One embodiment includes a device which senses the difference in pressure between the pipeline and the monitor chamber and delivers a signal when that difference becomes excessive. In another embodiment, a liquid reservoir at atmospheric pressure is connected to fill the monitor chamber on the other side of the diaphragm, so that the liquid pressure in the monitor chamber is proportionate to the rate of change of pressure in the pipeline and, when this pressure becomes excessive, an energizing signal is generated to relieve the surge.

Abstract: An inert gas is supplied in a conduit system at a pressure high enough to provide a desired shielding gas volume at each and all arc welding sites spread over a substantial work area and each welder is responsible for the performance of a lightweight, readily portable, security protected, fixed pressure output regulator of high accuracy preferably having a pressure gauge and two independent visible output flow meters and flow valves easily adjusted separately to provide proper shielding at the front and back of a weld simultaneously, but independently, under the personal control of each welder at each welding site with excellent mobility regardless of floor elevation, for an acceptable and individualized responsibility for each certified weld performed.

Abstract: A flow sensor particularly adapted to the measurement of fuel flow to internal combustion engines, but not limited thereto, the sensor including an annular raceway intersected by a tangentially disposed inlet jet nozzle and an outlet opening disposed immediately downstream of the inlet jet nozzle and radially offset therefrom whereby the initial fluid jet passes the outlet opening before radial distribution in the raceway, then circles the raceway and discharges into the outlet; the raceway receiving a ball having a density corresponding to the fluid for continuous rotation at a speed corresponding to the speed of the fluid movement in the raceway; the raceway having a traverse optical sensor to detect rotation of the ball; a chamber having a diaphragm exposed to flow through the inlet, the chamber assuming an expanded condition during increased flow and contractable on initial minimum flow to effect momentary supplemental flow to the raceway, and aid in maintaining movement of the counter ball.

Abstract: Fluid flow metering and control apparatus includes a positive displacement flow meter, a pressure sensor responsive to the pressure difference between the inlet and the outlet of the flow meter and a servo drive mechanism controlled by the pressure difference sensor to maintain the pressure difference between the inlet and outlet side of the flow meter at zero. A hydraulic motor is utilized as the servo drive means.

Abstract: A module which integrates into a single block a process gas flow control system for precisely metering the flow of gas fed into a furnace diffusion tube or other utilization device. The block is formed of a chemically-inert body having cavities therein for nesting a gas filter, a pressure-regulator, a flowmeter, a pressure indicator and the other components of the system necessary to set the flow rate and pressure of the gas. These components are intercoupled by internal bores in the block which define flow passages that communicate with the cavities.

Abstract: A pressure bumper or buffer is connected to a passageway between a pump and an oscillating type of flow rate meter for eliminating or alleviating a pulsation of the pressure of a pressurized fluid generated in the passageway by the pump to prevent the flow rate meter from failing to sense the real value of the flow rate of fluid fed to fluid consuming means.

Abstract: Measuring the mass flow of a liquid gas pumped from a storage tank to a consumer through a measuring station, includes the steps of throttling the flow of the liquid gas by a throttle in the measuring station; measuring the flow of the liquid gas according to the relationship ##EQU1## WHEREIN M is the flow rate, C and m are instrument constants evaluated by calibration, .DELTA.p is the head difference and .rho. is the liquid density; maintaining the delivery pressure of the liquid gas higher than its vapor pressure plus the maximum momentary head difference at the throttle; and compensating for the temperature-caused liquid density variation, including the steps of measuring the temperature of the liquid gas by a semiconductor having a resistance/temperature curve and adapting the curve to the density/temperature curve of the liquid gas.

Abstract: There is disclosed apparatus and method for determining pumping head requirements for an operating pumping system by subtracting a desired delivery head or pressure from an actual head. The difference represents overpressure, and this overpressure is subtracted from a measured pump total dynamic head to establish the pumping head requirement of the system. The pumping head requirement data is recorded together with other data indicating a measured fluid flow rate. The data so recorded is in a form for plotting a system head curve. Once the system head curve is available it is possible to modify the supply system so as to avoid pumping at a pressure in excess of that which may be required for any given flow rate condition. Such avoidance of overpressure pumping produces an energy saving in the operation of the pumping system.

Abstract: A device for bypassing flow rate pulsations resulting in reverse flow and abrupt flow rate surges around a volumetric flow rate transducer includes a housing defining a chamber. One end of the chamber is coupled in fluid communication with the inlet or upstream side of the transducer while the other end of the chamber is coupled in fluid communication with the outlet or downstream side of the transducer. A flexible, fluid impervious diaphragm is mounted in the housing so as to divide the chamber into two compartments. The diaphragm is affixed to the walls of the chamber so as to maintain a fluid seal between the two compartments of the chamber. When a forward flow rate pulsation occurs the resultant rise in the fluid pressure differential between the upstream and downstream compartments of the chamber will shift the diaphragm toward the downstream compartment. As the diaphragm moves, fluid is forced out of the downstream compartment and into the fluid stream on the downstream side of the transducer.

Abstract: A fluid impervious housing having an upper cavity for a water meter and a lower cavity for pressure regulating apparatus. A removable partition separates the cavities and removal of the partition provides access to both cavities for maintenance. The pressure regulator includes a reciprocable valve and the partition has a guide for such valve so that when the partition is removed the valve is accessible. The lower cavity is arranged to accommodate a valve structure employing Bellofram seals. A back pass check valve for affording reverse flow should the output pressure exceed the input pressure. A pressure relief valve for releasing water to the exterior of the apparatus should pressure downstream of the apparatus reach an excessive level. A screen for preventing entry of solid particulates into the relatively delicate meter mechanism in the upper chamber.