Abstract: In a thermal sensor. a capacitor voltage of a capacitor is compared with a reference voltage, and an output voltage is generated based on the comparison. The output voltage has a pulse density indicative of a temperature detected by the thermal sensor. The capacitor is charged or discharged using at least one of a first current signal or a second current signal based on a logic level of the output voltage. The first current signal is a temperature-independent signal, and the second current signal is a temperature-dependent signal dependent on the temperature detected by the thermal sensor. In some embodiments, a clock rate of a clock signal is varied in accordance with the detected temperature to control a timing operation for supplying the first current signal to the capacitor and/or the reference voltage is varied in accordance with the detected temperature.

Abstract: A cycle counter for a wheeled tractor scraper is disclosed. The cycle counter may have an ejector configured to push material from a bowl of the wheeled tractor scraper, a sensor configured to generate a pressure signal indicative of a position of the ejector, and a controller in communication with the sensor. The controller may be configured to determine movement of the ejector toward a full dump position based on the pressure signal, and to record completion of a cycle for the wheeled tractor scraper after the ejector has reached the full dump position only if a value of the pressure signal exceeded a threshold value during movement of the ejector toward the full dump position.

Abstract: A compliance system for monitoring vapor pressures in storage tanks. Embodiments of the system include data collection systems associated with different storage tanks. Each data collection system collects atmospheric pressure, differential pressure of the tank over the atmosphere, and atmospheric temperature data on a continuous or near-continuous basis. Periodically, the data is transmitted to a host computer, which collects data from multiple data collection systems. The host computer may transmit the data to a web server that makes the data available to any computer via a world wide web interface.

Abstract: A method and apparatus for measuring gas pressure by combining an ionization gauge with at least one other vacuum sensor. Nonvolatile memory coupled to the vacuum gauge contains calibration parameters unique to each individual sensor based on factory calibration. The nonvolatile memory may contain calibration parameters for a heat-sensitive vacuum sensor to compensate for the temperature gradients generated by the ionization gauge. The calibration parameters are a function of calibration data determined when the ionization gauge is both on and off. The nonvolatile memory may store a window of measurement data of the vacuum gauge that is updated at predetermined time intervals and in response to an event, such as an error event, to aid in investigating the cause of vacuum gauge malfunction or failure.

Abstract: A pipetting apparatus (1) comprises a fluidic space (7), to which a pressure transducer (11) with a pressure sensor (12) is attached with a gas filled space (15). The fluidic space (7) is defined by a pipette tip (2), a first tubing (5) that connects the pipette tip (2) to a pump (4), and an active part (6) of the pump (4). The pipetting apparatus (1) according to the present invention is characterized in that the pipetting apparatus (1) further comprises an impulse generating means (16, 18, 19) that is in operative contact with a column (10) of system liquid (8) inside the fluidic space (7). The impulse generating means (16, 18, 19) is designed to induce a vertical movement in this system liquid column (10), which results in a pressure variation in the gas filled space (15) that is pneumatically connected with the fluidic space (7).

Abstract: The invention relates to a measurement cell system, in particular a pressure measurement cell system, comprising a measurement cell and a memory unit containing at least one stored measurement cell-based stored value. The measurement cell together with the memory unit are designed as a separately operable unit.

Abstract: The invention relates to a pressure measuring arrangement comprising a pressure measuring cell which is fed by a pressure corresponding to the pressure which is to be measured by a pressure tube filled by a pressurised liquid; at least one pressure recording unit is arranged separately from said cell, said unit being impinged upon by a pressure which is to be measured during operation, producing a pressure corresponding to the pressure which is to be measured via a pressure line filled by a liquid; a connection between the pressure tube and the pressure line. A modular design and a large amount of flexibility is obtained in respect of the spatial arrangement of the pressure measuring cell and the pressure recording unit. The connection consists of a base body wherein at least one end section of the pressure line is arranged, in addition to a pressure screw through which the pressure tube passes and is secured by a fixing element arranged on a side which is oriented towards the base body of the pressure screw.

Abstract: A system and method for monitoring a pressure relief device are provided. The system includes a release sensor that provides an indication when the pressure relief device activates. A wireless transmitter is connected to the release sensor and sends a wireless transmission having an activation signal when the indication is provided by the release sensor. A receiver receives the wireless transmission from the transmitter and generates a warning when the activation signal is identified.

Abstract: The invention relates to a pressure measuring arrangement comprising a pressure measuring cell (5) which is fed by a pressure corresponding to the pressure which is to be measured by a pressure tube (3) filled by a pressurised liquid; at least one pressure recording unit (25, 45) is arranged separately from said cell, said unit being impinged upon by a pressure which is to be measured during operation, producing a pressure corresponding to the pressure which is to be measured via a pressure line (33, 55) filled by a liquid; a connection between the pressure tube (3) and the pressure line (33, 55). A modular design and a large amount of flexibility is obtained in respect of the spatial arrangement of the pressure measuring cell (5) and the pressure recording unit (25, 45).

Abstract: A method for obtaining the average ambient air pressure outside of a building places a pressure sensor on each major outside wall of the building or around the outer circumference of a one sided (e.g., round) building. The pressure reading from each pressure sensor is obtained and the pressure readings are added together to obtain a total reading. The total reading is divided by the number of pressure readings making up the total, the result being the approximate average ambient air pressure outside of the building.

Abstract: The present invention proposes a measurement apparatus and a method for measuring a seat mat for a vehicle seat which serve to perform a function test or a recording of readings by way of a negative pressure that is generated in the seat mat. The negative pressure is established by way of a pressure difference between said negative pressure and the external atmospheric pressure. The method according to the present invention is thus independent of the external atmospheric pressure. The controller that establishes the pressure difference is embodied either electronically or mechanically.

Abstract: A paperless recorder for recording pressure and alarm condition data from a fire controller for a fire pump control system. The fire pump is connected a pipe network which has a pressure sensor for sensing pipe pressure. The recorder is connected to the pressure sensor and checks for pressure changes. When a pressure change is detected, it is stored in an electronic memory. Pressure readings are also periodically stored in the electronic memory. The recorder may also monitor alarm voltages and alarm contacts which may also be stored in the electronic memory. The stored data may be transmitted to a computer via modem or port connection for further analysis.

Abstract: The present invention includes a can tester having a main body for holding a can, a mechanism for positioning and securing the can, a movable measuring portion and a mechanism for moving the movable measuring portion. The mechanism for moving the slidable measuring portion includes a first component and a second component substantially perpendicular to the first component. The present invention also includes a method for measuring a pressurization of retorted cans.

Abstract: This invention relates to a sub surface pressure gauge comprising an axially displaceable drum with a chart disposed within a housing and having a selective axial movement, rotatable stylus for recordal of pressures on said chart provided on said drum. A motor actuates the drum through a programmable switch, the output shaft of said motor providing for linear displaceable movement of the drum controlled by said switch.

Abstract: The electronic recording manometer is intended particularly for the graphical representation of atmospheric pressure and for use aboard ship. A generator element (1,5,6) supplying pressure-equivalent electric pulses is connected to the input of a microprocessor (2). The microprocessor (2) is provided with a clock unit (8) and a memory unit in which a calendar is stored, and which records the measured pressure values for a predetermined length of time. The outputs (4, 7) of the microprocessor (2) are connected to a liquid crystal display (3) to provide digital pressure display and graphic representation of the march of pressure, as well as being connected to a visual and/or acoustic warning device. The warning device is actuated if the pressure rate of the pressure drop exceeds a value between 0.5 and 5 mb/hour. The clock unit (8) and the memory unit can be adjusted and/or called up by means of film keyboard elements (9).

Abstract: A method of determining the pressure applied to a limb by an inflatable garment by placing a flexible pressurizable cuff between the garment and the limb to receive the compressive garment forces and then determining the pressure in the cuff due to those compressive forces alone. The cuff pressure component due to compression of the garment is determined by extra-polating from a plot of cuff pressure versus bias pressure. The bias pressure is required to obtain an accurate reading of cuff pressure and is eliminated as a component in determining the garment pressure by means of the extrapolation. A preferred transducer for converting cuff pressure to electrical signals employs a manometer tube extending between two plates of a capacitor.

Abstract: The invention relates to a device for accurate subaqueous measurements of the vertical displacements of a reference point e.g. the head of a pile by using a pressure difference recorder at the reference point which measures the difference between an air filled chamber and the water pressure outside said chamber, said recorder being bridged by a tube interconnecting the two pressure regions and having a valve which in the open position interconnects the two regions said air chamber being located above the recorder while the valve has an electromagnetic operating member placed in a circuit with the recorder and a measuring device, the initial pressure in the air chamber being the atmospheric pressure at the water surface.There may be two identical devices each having a switch in the circuit of the recorder which brakes the circuit at the end of the measuring range, the switches of the two devices operating such that when one interrupts the other makes its circuit.

Abstract: A device is described for determining the characteristic configuration of long, towed underwater structures such as tubes or cables. The device is a collar which fits around the structure and has sufficient hydrodynamic drag that it remains essentially stationary relative to the linear configuration of the structure as the structure is drawn through it. The device, however, has relatively low mass and assumes the horizontal and vertical position of the structure as the structure is drawn through it. Instrumentation within the device registers the position assumed by the collar and either records it or transmits it to an external receiving station. This information gives a characteristic profile of the elongated structure as it passes through the water.

Abstract: A sphygmomanometer gauge included a stationary dial having graduations indicative of different blood pressure values. A needle is turnable about an axis over the dial in response to changes in air pressure generated in the sphygmomanometer. A pair of adjustable members are mounted on the gauge for turning movement in either circumferential direction about the axis. Each adjustable member has an access portion which extends through the gauge housing to thereby permit independent and manual turning. A systolic indicator and a diastolic indicator are respectively mounted on the adjustable members for turning movement with the latter. Each indicator is operative to simultaneously indicate both a single value and a range of values of blood pressure.

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: In underwater diving a record is made on an electronic recorder of the instantaneous pressure to which the diver is subjected at successive time intervals to give complete time-versus-pressure records for any one diver for a given time period, for example, twelve hours. A pressure transducer delivers an electronic signal to the recorder, and this pressure data is recorded at successive time intervals, for example, every minute of the twelve-hour period. The recorded data is read digitally and is read in analogue in the form of an x-y graph, either permanent or fleeting. The recorded data is preferably kept in permanent form on electronic chips also referred to as programmable read-only memories. The entire recording device can be carried by the diver, and the readout apparatus may be located at the surface of the water. Continuous topside monitoring is also provided.

Abstract: A recording compression testing meter having a measuring cylinder connected to the spark-plug hole of an engine cylinder by means of a tube and having an indicator arm movable by the piston of the measuring cylinder over a portion of recording paper fed from a roll of paper carried in a removable cartridge, the paper being fed from the roll by a drive mechanism carried by the cartridge so that tests of a large number of cylinders can be recorded on the continuous sheet of recording paper fed from the paper roll before it is necessary to reload the meter and the test of the cylinders of each engine can be torn off and stored separately.

Abstract: The invention concerns apparatus for measuring the velocity of low frequency mechanical vibrations, comprising two springs between which a vibratable mass is secured, two electric coils mechanically coupled to the mass, a permanent magnet core in each coil which is stationary relative to its associated coil, one coil being a measuring coil while the other is a feedback coil; and a current generator having a control input to which the measuring coil is connected while the feedback coil is connected to the generator output, the connection polarities being so selected as to produce negative feedback.

Abstract: A vibration detector including a probe, a transducer and an amplifier coupled to visual and audible read-out devices for monitoring mechanical and electro-mechanical equipment during operation.

Abstract: An impact impulse measuring device comprises, in accordance with the invention, an acceleration pick-up which transforms a mechanical shock into electric signals and is connected via an amplification unit to a unit for measuring the peak value of an impact impulse. The impact impulse measuring device also includes a noise rejector comprising a counting decade connected to the output of the unit for measuring the peak value of an impact impulse, a commutator coupled to outputs of the decade, an AND NOT gate, a flip-flop and an AND gate. The outputs of the commutator are connected via the AND NOT gate to an adjusting input of the flip-flop and its output is coupled with the AND gate. Eight levels of noise protection can be set with the help of commutator contacts.

Abstract: The present device has a three-piece spring-loaded main housing with a cavity therein, and an accelerometer assembly disposed in said cavity and arranged therein to be held between a plurality of O-rings located on both ends thereof. One of said pieces of said main housing comprises a plastic tip. The entire main housing is located within a sleeve and is spring-loaded to force said plastic tip against the rotating shaft whose displacements are being monitored.

Abstract: The invention relates to an electromagnetic velocity pickup of the horizol seismometer type, wherein an oscillating mass is elastically suspended as an inverted pendulum with the aid of a deformable system of the articulated parallelogram type. The pickup is characterized in that the suspension comprises rigid beams and at least one elastic pivot.

Abstract: A vibrating mass consisting of an electrically conductive liquid is capable of alternate motion in two opposite directions within a narrowed section of a leak-tight vessel placed in a medium in which vibrations are to be measured. The speed of motion of the conductive liquid within the narrowed section generates a voltage which is proportional to the frequency and amplitude of the mechanical vibrations.

Abstract: A mechanically resonant ground motion sensor having a frequency response which is "tuned" to discriminate between applied vibrational forces which are destructive and those which are not. The basic operating principle of the sensor is that of an oscillating mass whose dynamic response to applied forces takes the form of viscously damped harmonic motion. The disclosed embodiments include a horizontal ground motion detector based on the movement of a pendulum in a viscous fluid and a vertical ground motion detector utilizing a vertically sprung dashpot cylinder moving through a viscous fluid. The detector is tuned to trigger a tripping mechanism in response to accelerations above a threshold value and within the critical range of destructive frequencies.

Abstract: An electromechanical transducer employs an Eddy current type displacement sensing device mounted in confronting relation to a seismically supported, nonmagnetic metal beam which is presented within an enclosed chamber. Movement of the nonmagnetic metal beam is damped. Movement of the nonmagnetic metal beam relative to the Eddy current type displacement sensing device occurs when the device is moving cyclically at low frequencies up to about 200 Hertz. Because of the damping of the movement of the metal beam, its instantaneous displacement is proportional to the instantaneous acceleration applied to the transducer. The output electrical signal from the Eddy current displacement sensing device can be integrated to provide an output signal directly proportional to the instantaneous velocity of the transducer. The signal can be twice integrated to provide an output signal corresponding to the instantaneous displacement of the transducer.

Abstract: To detect and discriminate by magnetic and seismic means any metallic intruding object, sensors are emplaced in areas into which the object to be detected and identified is expected to enter. In prior like sensors, separate magnetic and seismic sensors were used. The subject invention combines the magnetic and seismic sensing functions into an integrated device, the common structure of which is sensitive to magnetic and seismic signatures simultaneously.

Abstract: The invention relates to geophones and/or seismometers utilizing a casing housing a permanent magnet and a coil mass resiliently supported within the casing for movement relative to the permanent magnet along a primary axis, and wherein the mass is movably supported relative to the casing upon diaphragm springs utilizing involute spring elements. Undesirable vibrational responses occurring in the diaphragm springs resulting from orthogonal forces are suppressed by partially filling the void within the casing with a damping fluid wherein the several involute spring elements of a spring are immersed or exposed to the damping fluid in varying degrees to damp resonant narrrow band orthogonal vibrations within the spring elements and permit accurate sensing along the primary axis over wide frequency ranges.