Abstract: A weight measurement method and apparatus for measuring and monitoring the weight load on a vehicle such as a tractor trailer rig. A load pin and bearing assembly mechanically couples the weight of a trailer and its payload to the leaf springs of a tractor trailer truck. The shackle pin is intersected by a longitudinal bore in which multiple strain gage sensors are mounted. A miniature signal processing unit is totally enclosed and shielded within the longitudinal bore and is electrically connected to the strain gage sensors. The signal processing unit develops weight signals that are communicated by conventional low voltage signal cabling to a load display unit in the tractor cab. An offset lubricant passage provides a means for lubricating the load pin bearings while preventing contact of the lubricant with the strain gages, internal wiring and signal conditioner components housed within the main longitudinal bore.

Abstract: In a vibrating tube meter such as a Coriolis meter, an accurate measurement of a fluid parameter such as density can be obtained, substantially independent of stress, by measuring vibrational characteristics, particular resonant frequencies of two different vibrational modes. Stress or other variables can be determined from the measurement. Because the measurement of or compensation for stress is based directly on the vibrational characteristics, better accuracy may be obtained than by using a conventional strain gauge to measure stress. The techniques disclosed can give accurate results without requiring particular constraints on meter design.

Abstract: A screwer test bench includes a coupling designed for coupling with the head of a screwer. The coupling is connected to a braking unit through a sensor unit for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit includes a cap connected to the coupling and a movable member thrust on command in the brake operation direction. The movable member is constrained against rotation around the brake axis by an inextensible wall with a configuration deformable in the braking direction. Advantageously the wall is in the form of a bellows into which is fed pressurized fluid to bring about its elongation and operate the brake.

Abstract: A screwer test bench includes a coupling designed for connection with the head of a screwer and connected to a controlled braking unit and a sensor unit for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit includes a thin cap constrained to said coupling at least in the direction of rotation and arranged between a first pressure surface thrust axially against the cap by an actuator and a second fixed opposition surface.

Abstract: A screwer test bench including a coupling designed for coupling with the head of a screwer and a controlled braking unit. A sensor unit detects mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit includes a brake with carbon friction surfaces in an oil bath.

Abstract: An impact sensor for indicating exposure of an electronic equipment to a predetermined impact force is described. The impact sensor has a hollow case, a mass within the case, and a number of wire filaments supporting the mass within the case. Exposure of the sensor to the predetermined impact force results in a force acting on the mass sufficient to cause at least one of the filaments to break. The breaking of at least one of the filaments indicates to a repairer that the electronic equipment has been exposed to the predetermined impact force.

Abstract: A semiconductor sensor chip is interposed between a sensor case and a housing. A first pressure is introduced from the sensor case and applied to a rear surface of the sensor chip, while a second pressure is introduced from the housing and applied to a front surface of the sensor chip. The sensor chip detects a pressure difference between the first and the second pressures and converts it into an electrical signal. The sensor chip is hermetically mounted in a depressed portion formed in the sensor case by charging a sealing material from holes formed around the depressed portion. The charging holes are positioned between terminals electrically connecting the sensor chip to an outside circuit to avoid enlarging the pressure sensor size by forming the charging holes.

Abstract: A gravity meter comprises a casing, a vacuum tube mounted in the casing in a vibration-free manner, a sensor mechanism mounted within the vacuum tube, the sensor mechanism comprising two masses of different size acting on the respective arms of a beam balance comprising a material whose shape is arranged to change in response to changes in gravity and whose shape can be restored by the application of an electrical current thereto, and detector means arranged to provide from the restoring current an output representative of changes in gravity. The material is preferably a piezoelectric material.

Abstract: It is the objective of this invention to reduce deviation in contact resistance variation between electrodes among pressure-sensitive resistor sensors. The sensor is composed of a pair of films. One film has a plurality of electrode portions extending in a certain direction and the other film has at least one electrode portion that is arranged in a transverse relation with a plural of the electrode portions on the other film. Contact points generated by applied pressure are limited to crossing points between the electrode portions of the pair of films. As a result, variation in contact resistance due to applied pressure shift becomes more constant. Thus, it is possible to reduce deviation of contact resistance between the electrodes among sensors.

Abstract: A pressure sensor is provided, in which dead space is not formed under the diaphragm so that air or fluid will not be remained in the dead space. The pressure sensor having a passage for flowing fluid from one end to the other end thereof comprises a sensor head having a pressure sensitive area responsive to the fluid pressure and a diaphragm having a pressure receiving surface for receiving the fluid pressure directly, wherein the pressure receiving surface is disposed so as to protrude to the inside of the passage, and the pressure sensitive area is disposed on the opposite surface from the pressure receiving surface of the diaphragm.

Abstract: Displacement measuring means are fixed onto the structural element. A hole is drilled in the measurement zone and a supply pressure is applied to a flat actuator introduced into the hole. The displacements measured are analyzed as a function of the supply pressure to determine the stress from a supply pressure which roughly compensates for the deformation of the element due to the drilling of the hole. The measuring means comprise two arms that are fixed to the element at two respective anchoring points aligned parallel to a measuring direction, and at least two displacement sensors mounted on the arms on each side of the anchoring points to measure the variations in separation between the anchoring points. The arms leave between them a gap through which the hole is drilled at a central position with respect to the anchoring points.

Abstract: A pressure sensor (1) has a circuit board (5) having a circuit portion (11) for amplifying an electric signal detected by a pressure detecting element (2C) and attached with an IC die (16), and a terminal (12) for inputting and outputting the electric signal from the circuit portion (11). The circuit portion (11) and the terminal (12) have a frame (11A, 12D) formed by a metal plate, the metal plate being provided with resin molds (14, 15). The circuit portion (11) and the terminal (12) are continuously formed, so that steps for soldering etc. is not necessary.

Abstract: In a pressure sensor made by bonding a sensor chip and a metal stem together with a resin adhesive, fluctuation of the sensor output caused by temperature changes are maximally reduced. The resin adhesive for bonding together the sensor element and the metal stem has a creep characteristic defined as CR=A×&sgr;B between its creep rate CR and stress &sgr; upon it with A and B being constants. The resin adhesive is selected to satisfy that the constant B is not greater than 3.5.

Abstract: An electric pressure probe for an aircraft comprises: a pitot tube assembly for collecting pneumatically air pressure in the vicinity of the assembly; a strut including one end mountable to a surface of the aircraft, the pitot tube assembly being coupled to another end of the strut for being supported away from the aircraft surface; a pressure sensor integral to the strut and pneumatically coupled to the pitot tube assembly for converting the pneumatic pressure collected thereby to an electrical pressure signal; and circuitry integral to the strut and coupled to the pressure sensor for signal conditioning the electrical pressure signal, the circuitry including at least one output lead for conducting the conditioned electrical signal from the probe.

Abstract: A universal regulator tester is disclosed wherein a bleed valve is used to exhaust pressurized gas through an exhaust passage that is designed and configured to simulate the pneumatic action of an actuation of a marker. The universal regulator tester can be used to test apparatuses with pressures up to 1200 PSI and can be used on pneumatic paintball guns, markers and similar devices.

Abstract: An air flow compensator for use with flow meters which includes a main slide element, a secondary slide element and first and second spring elements. The main slide element includes a magnetic insert in one end thereof and is movable toward a proximity sensor that detects the proximity of the magnetic insert. The first spring element biases both the main slide element and the secondary slide element away from the proximity sensor and the second spring element biases only the secondary slide element away from the proximity sensor. The secondary slide element is both movable together with the first slide element and independently movable with respect to the main slide element.

Abstract: An apparatus mounted on a valve for indicating a pressure of tire comprising a pressure indicator formed of transparent plastic and including a base having a scale, base consisting of an inner hollow cylinder sleeved on valve and an outer hollow cylinder with tops of cylinders open, a spring put on inner hollow cylinder, a seal put on inner hollow cylinder being urged by spring for eliminating a potential air flow through an inner or outer periphery of seal, and a cap having a downward peg engaged with valve, cap being releasably secured to a top of base. In indicating pressure of tire, air is flowed from within tire to push down seal through valve and pressure indicator so that a top of seal is aligned with one of marks of scale. Further, pressure indicator is disengaged from valve prior to inflating tire.

Abstract: A tire pressure gauge with a light device. The device includes a cylindrical casing, a light penetrable scale mounted in the casing, a spring device mounted in the casing for biasing the scale in the casing, a piston movable in the casing, and a battery and lamp assembly which may be detachably fastened to one end of the scale outside the casing or provided inside the casing. The device further includes an air nozzle fixedly fastened to one end of the casing and adapted for being, engaged with the air valve of a vehicle tire to guide air from the vehicle tire into the casing to move the piston, causing the piston to force the scale out of the casing to an extent indicative of the pressure of the vehicle tire.

Abstract: A pressure transducer assembly includes a transducer member supporting a transducer element for measuring pressure within an environment. The transducer member has a sealing surface surrounding the transducer element. A housing having an integral resilient member resiliently supports the transducer member and exerts a sealing force on the transducer member against a mating member secured to the housing.

Abstract: A model for a wind tunnel test fabricated at a low cost, in which a plurality of small bores opening on a surface of a wing and a plurality of passages permitting the small bores to communicate therewith. The plurality of small bores and the plurality of passages are so disposed that they do not interfere with each other.