Abstract: A linear accelerometer is provided having a substrate, a fixed electrode supported on the substrate and including a first plurality of fixed capacitive plates, and an inertial mass substantially suspended over a cavity and including a plurality of movable capacitive plates arranged to provide a capacitive coupling with the first plurality of fixed capacitive plates. The inertial mass is linearly movable relative to the fixed electrode. A central member is fixed to the substrate. Support arms support the inertial mass relative to the fixed electrode and allow linear movement of the inertial mass upon experiencing a linear acceleration along a sensing axis, and prevent linear movement along a nonsensing axis. Inputs and output lines are electrically coupled to the fixed electrode and the inertial mass. An output signal is generated which varies as a function of the capacitive coupling and is indicative of linear acceleration along the sensing axis.

Abstract: The present invention relates to measurement of cross-inertia-moment in a limited angular rotatory axis, and more specifically, to a measuring device and method of cross-inertia-moment in a limited angular rotatory axis. The measuring device includes a base plate; a pair of first supporters, each end portion being secured on the base plate through a load cell, for supporting a first rotatory axis; a second supporter installed inbetween the pair of first supporters to be able to rotate round the first rotatory axis, for supporting a second rotatory axis that is orthogonal to the first rotatory axis; and a roller installed at the inside of the second supporter, being rotatable round the second rotatory axis. Therefore, the present invention enables to measure and amend the cross-inertia-moment of multiple axis LOS (line of sight) stabilizer as well as low speed rotatory machinery.

Abstract: A boat mounted speedometer for providing a speed signal to a boat operator. The system includes a probe that reaches a laminar flow of water below the back edge of the boat. An opening in the probe allows for water pressure, proportional to boat speed to build up in the system. Any air trapped in the water in the system is bled out through a bleed valve. A pressure transducer reads out a signal and a processor generates a digital signal proportional to pressure and speed of the boat. The signal is read out for the operator on a back lit digital speedometer display.

Abstract: A bicycle which comprises as force transmission equipment a chain for transmitting the muscular strength of a person pedaling the bicycle from the person to the bicycle for the purpose of moving the bicycle, characterized in that the chain has a vibration transducer which is arranged to vibrate at a resonance frequency proportional to the force transmitted by the chain, and the bicycle comprises a reading device separate from the chain for reading the resonance frequency of the vibration transducer, to which reading device calculation means are connected for calculating the force affecting the chain on the basis of the resonance frequency.

Abstract: A thick film resistor strain gauge is applied to a stainless steel shell portion of a spark plug. There are two preferable ways of applying a thick film resistor to the metal shell. In a first embodiment, the thick film resistor may be directly printed on to the shell portion with special screen printing equipment. In a second embodiment, the thick film resistor is printed and applied as a decal to the shell portion. The thick film resistors may be included in a quarter, a half, or a full wheatstone bridge strain gauge circuit. One of two embodiments of an automatic drift compensating circuit is used to determine the change in resistance experienced by the thick film resistors affixed to the spark plug. Either one of the automatic drift compensation circuits output a voltage signal which is proportional to the pressure changes occurring inside the engine cylinder into which the spark plug is threaded.

Abstract: An angular velocity of the present invention includes a resonator formed of a resonating member and a connecting member, a first base connected to the connecting member, a holding plate to hold the first base, a circuit board fixed onto the holding plate, an elastic body disposed on an end part of at least one selected from the holding plate and circuit board, a case housing the resonator, first base, holding plate, circuit board and elastic body and provided with an opening, and a second base put in place so as to close the opening of the case. The resonator has a short side and a long side.

Abstract: An acoustoelectronic method and apparatus for generating real-time three-dimensional images of an object and characterizing such object are provided. The object is insonified with an incident acoustic signal derived from an electrical signal. Acoustic signals scattered from the object are collected by an acoustic receiver, which generates analog electrical signals that are subsequently converted to digital electronic signals. The digital electronic signals are used in both direct-imaging and holographic methods to produce a three-dimensional representation of the object from which images and characterizations can be generated.

Abstract: A device for measuring the specific density of a gaseous or liquid medium (8) having an acoustic transducer (1), which is active on both sides, and further having cylindrical delay paths (4, 5) as well as a ring (6) in which the acoustic transducer (1) is embedded. The diameter of the acoustic transducer (1) is selected such that it is smaller than the diameter of the delay paths (4, 5) so that diffracted waves generated in the area of the edge of the acoustic transducer generate fewer parasitic echoes and surface waves on the boundary surfaces (7, 9) resulting in less corruption of the measured result.

Abstract: An apparatus and method for regulating the growth of connective tissue proper in vivo are provided. The apparatus includes a magnetic field generator and a magnetic field detector for producing a controlled, fluctuating, directionally oriented magnetic field parallel to a predetermined axis projecting through the target tissue. The field detector samples the magnetic flux density along the predetermined access and provides a signal to a microprocessor which determines the average value of the flux density. The applied magnetic field is oscillated at predetermined frequencies to maintain a preselected ratio of frequency to average flux density. This ratio is maintained by adjusting the frequency of the fluctuating magnetic field and/or by adjusting the intensity of the applied magnetic field as the composite magnetic flux density changes in response to changes in the local magnetic field to which the target tissue is subjected.

Abstract: An examination apparatus for measuring the oxygenation in body organs by the near infrared light transmission spectrophotometry. The invention relates to an improvement of an illumination-side fixture and a detection-side fixture. In order to hold optical fibers for introducing infrared light in their natural conditions, the fixtures are equipped with respective prisms for changing light paths by prescribed angles. Also, the fixtures are equipped with respective light-emitting diodes for indicating if the examination apparatus is in its operating condition.

Abstract: A sensor for the noninvasive measurement of the pulse rate and/or oxygen saturation of the blood of a person has a housing holding a transmitter and a receiver. The housing has thin, light-permeable layers in the areas of the light source surface of the transmitter and the light detecting surface of the receiver. Both the transmitter and the receiver are mounted on a flexible conductor plate. The housing is formed of a tight sheathing covering the transmitter, the receiver and the conductor plate supporting the transmitter and receiver.

Abstract: A noncontact type tonometer projects a fluid toward an eye-to-be-tested and obtains a measured value of eye pressure from a relation between transfigurations of the eye due to the fluid projection and the pressure projecting of the fluid. A detecting circuit senses a pulse wave of the person-to-be-tested and a calculating circuit determines at least one of the maximum eye pressure value, minimum eye pressure value and average pressure value of the eye dependent on the maximum fluctuation width of the detected pulse wave, a fluctuating quantity of the detected pulse wave, and the measured eye pressure value. The calculation circuit determines the pulse wave fluctuating quantity at the time point when the eye pressure is measured. The pulse wave of the person may be measured at a position remote from the eye. The tonometer may also include a display for displaying the pulse wave and a display controller for displaying the time point when the eye pressure is measured.

Abstract: Apparatus for use in testing muscle strength comprising a transducer including strain gauges mounted to provide deflection readings that will be accurate for even different directions of force application and read out apparatus receiving strain gauge data and for displaying output data indicative of muscle strength.

Abstract: An apparatus and method for regulating the growth of living tissue are provided. The apparatus includes a deformable magnetic field generator and a magnetic field detector for producing a controlled, fluctuating, directionally oriented magnetic field parallel to a predetermined axis projecting through the target tissue. The deformable magnetic field generator includes a pair of field coils embedded in a flexible material which allows the field coils to be plastically deformed to fit the contour of a body region such as a patient's limb. The field detector samples the magnetic flux density along the predetermined access and provides a signal to a microprocessor which determines the average value of the flux density. The applied magnetic field is oscillated at predetermined frequencies to maintain a preselected ratio of frequency to average flux density.

Abstract: A multiple wavelength light spectrophometer for non-invasive monitoring of a body organ in vivo comprising: a single pulsed light source, optical fibers for transmitting to and receiving the infrared radiation from the organ, a radiation detector capable of branching received radiation into several different wavelengths, an amplifier, and a data acquisition system including a microprocessor capable of compensating for light diffusion effects by employing a specific algorithm.

Abstract: A small battery-operated oximeter noninvasively measures tissue oxygenation. This oximeter employs a high intensity, very short duration light pulse that penetrates clothing of a patient. A photodetector assembly of the oximeter is responsive to light reflected through clothing of the patient. The oximeter optically filters the reflected light. A ratio of the intensity of reflected red light to the intensity of reflected infrared light indicates tissue oxygenation of the patient.

Abstract: An apparatus and method for regulating the growth of cartilage in vivo are provided. The apparatus includes a magnetic field generator and a magnetic field detector for producing a controlled, fluctuating, directionally oriented magnetic field parallel to a predetermined axis projecting through the target tissue. The field detector samples the magnetic flux density along the predetermined axis and provides a signal to a microprocessor which determines the average value of the flux density. The applied magnetic field is oscillated at predetermined frequencies to maintain a preselected ratio of frequency to average flux density. This ratio is maintained by adjusting the frequency of the fluctuating magnetic field and/or by adjusting the intensity of the applied magnetic field as the composite magnetic flux density changes in response to changes in the local magnetic field to which the target tissue is subjected.

Abstract: A catheter of the type suitable for implantation in a human heart has a catheter tip and a preset curvature spaced along the catheter a distance from the tip. The catheter includes an integrated measuring probe with a measurement window, the measuring probe and window being disposed between the tip and the preset curvature at respective distances from each so that, given the aforementioned location of the catheter tip, it is insured that the measurement window of the probe will not lie against a wall of the heart, which would degrade the operation of the measuring probe, and moreover insures that the measuring probe and measurement window will be disposed at an optimum location for undertaking the desired measurement.

Abstract: A method and apparatus for measuring the oxygen saturation level and hematocrit of human blood in real time. A catheter having a notch in its tip is inserted into a blood vessel and guided to a desired location in the body of a patient. Bursts of light at each of three wavelengths are transmitted through the blood in the notch. The intensities of the bursts of light after transmission are utilized along with a set of molecular exinction coefficients and optical scattering coefficients to calculate the oxygen level and hermatocrit. The light is provided by a set of LEDs in a housing connected to the catheter and the intensity of the transmitted light is measured by a photocell in the same housing. Optical fibers transmit the light through the catheter between the housing and the notch. Characterization resistors in the housing are encoded with characteristics such as the wavelengths of the LEDs and the width of the notch.

Abstract: A holder sleeve locks a detecting and measuring sensor into position, especially a detecting and measuring sensor for oximetric measurements, on the surface of a protruding part of a human body. The sensor includes a light source and a receiver which is sensitive to its radiation. The sleeve is elastically expandable and completely surrounds the body protruding part. each of two diametrically opposite sections of the sleeve has a recess opening to the sleeve inside surface or is radiation-permeable to receive and hold the transmitter or the receiver. Both portions of the sleeve lying between these sections have pluralities of folds following one another around the sleeve periphery, with each fold forming a spring.