Class 73/862.624 - Using a light sensor

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the sensing means detects a change
No. of patents: 41
Last issue date: 07/26/2011

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Number	Title	Issue Date
7984659	Device and method for measuring compressive force of flexible linear body A measurement device can detect a degree of bending of a linear body with a sensor when compressive force in a direction of longitudinal axis is applied to the linear body as a result of contact of a tip end of the linear body with an obstacle. Then, the detected de...	07/26/2011
7380475	Dynamometric cell A dynamometric cell having an elastically deformable force transducer for receiving a weight force and a sensor arrangement for detecting the deformation of the force transducer and its conversion into an electric weight signal is disclosed, wherein the force transd...	06/03/2008
7151532	Multifunctional multilayer optical film Optical component for use in a touch sensor and method of fabrication of same are disclosed. Optical component includes a multilayer optical film at least some layers of which are fabricated on the same manufacturing line and using the same manufacturing method. Eac...	12/19/2006
7031807	Device and method for securing apparatuses with parts freely movable in space The invention relates to a safety device for apparatuses having parts freely movable in space, particularly handling equipment such as industrial robots or driverless transportation means, as well as a method for securing such apparatuses by means of such a safety d...	04/18/2006
7021158	Surface-pressure distribution sensor and method for controlling operation thereof A surface-pressure distribution sensor includes a plurality of unit detection elements placed in a sensor area of a substrate and a switch formed on the substrate. The sensor is configured to operate under an operation mode in which the unit detection elements are s...	04/04/2006
6980008	Uneven pattern detector and uneven pattern detecting method An uneven pattern detector has a structure wherein (a) detecting elements, each being provided with a TFT which is a switching element and a detecting electrode, are arranged in a matrix manner, and (b) a CSA connected to each data line detects charged or discharged...	12/27/2005
6952490	Fingerprint recognizing device having patterned floating electrodes and fabricating method therefor A fingerprint recognizing device having patterned floating electrodes is disclosed. The fingerprint recognizing device includes a transparent electrode layer to which one terminal of an AC power source is connected; a light emitting layer for forming an electric fie...	10/04/2005
6710328	Fiber optic composite damage sensor A composite structure contains crystalline and/or polycrystalline triboluminescent elements distributed therein externally and/or internally, totally and/or regionally. The structure is instrumented with at least one optical fiber which is coupled therewith penetrat...	03/23/2004
6688186	Slim type fingerprint recognition device using contact light emitting device and thin film transistor fingerprint input device A slim type fingerprint recognition device including: a TFT fingerprint input device having a structure where a plurality of unit cells including an light sensing unit and a switching unit are aligned; and a contact light emitting device being installed o...	02/10/2004
6619134	Measuring device for measuring small forces and displacements The object of the invention is a measuring device for measuring small forces and displacements having in a body (1) of the device a detector means comprising a light source (4) and a position-sensitive detector (5), and a sensing means comprising a spring...	09/16/2003
5844146	Fingerpad force sensing system A fingerpad force sensor system is disclosed which is useful for detecting process variations during manufacturing processes in which a plurality of force sensors are applied to the gripper of a robot in order to monitor shear forces applied to the workpi...	12/01/1998
5747699	Method of measuring torsional stresses and/or axial stresses on a rotating shaft or on a comparable workpiece A method for measuring torsional stress and axial stress of a rotating workpiece includes the step of arranging at a surface of the workpiece at least two reflector pairs such that connecting lines between reflectors of each reflector pair are slanted rel...	05/05/1998
5675415	Physical quantity measurement apparatus and instrument therefor A physical quantity measuring apparatus in which the measurement range of the physical quantity such as displacement, pressure or the like can be widened. Laser beams different in wavelength are radiated through an optical fiber onto a diaphragm and the l...	10/07/1997
5604318	Optical pressure detector The invention relates to an optical pressure detector for instance in the form of an optical alarm with a multimode light guide (1) imbedded in a contact pad (2) subject to pressure, said light guide being curved by the compression of the contact pad (2)....	02/18/1997
5568259	Elongation measuring method and laser noncontact extensometer The present invention is arranged such that: laser light is irradiated onto the surface of a specimen over a predetermined length thereof in the direction of elongation to be measured; that scattering light of the laser light reflected from the specimen s...	10/22/1996
5540108	Multi-axis wheel transducer with angular position detector An apparatus and method for a multi-axis wheel transducer are disclosed. The apparatus of the invention comprises a wheel transducer for measuring the loads and moments acting on a vehicle wheel. Tubular load cells positioned in a radial fashion around th...	07/30/1996
5532479	Temperature, pressure, vibration or humidity sensor based on reflected light from a bimetallic, plastic or dehumidifying material A multi-function sensor using a semiconductor laser capable of sensing a value of a measurement object such as temperature, humidity, pressure or vibration on the basis of a variation in the distance between a measurement object medium adapted to respond ...	07/02/1996
5490426	Method for detecting stresses A method for detecting stresses includes the steps of dispersing a fluorescent substance in a solid portion where stresses are to be detected, measuring fluorescence decay time of the fluorescent substance dispersed in the solid portion, and detecting str...	02/13/1996
5365059	Parallel beam force measurement apparatus having an optical light sensor means Presented is a strain measurement transducer incorporating a load-beam subject to deflection when a load is applied, and a non-load-bearing beam mounted on the load beam in a manner to preclude displacement of the non-load-bearing beam when the load beam ...	11/15/1994
5348019	Optical fiber pressure sensing catheter An optical fiber pressure sensing catheter and a method for using such for detecting a discrete pressure within an organ such as an esophagus. The catheter comprises an elongated hollow body having a wall, a closed proximal end, a closed distal end, and a...	09/20/1994
5298964	Optical stress sensing system with directional measurement capabilities A stress sensor having directional measurement capabilities based on the photoelastic effect in isotropic photoelastic materials. Directional measurement capability is achieved in the sensor by the incorporation of three different optical axes passing thr...	03/29/1994
5195375	Miniaturized pressure sensor A miniaturized pressure sensor for physiological in situ measurements has an elastic material shell having an outer surface with an opening extending therethrough. The opening is covered by an elastic diaphragm and a light conductor having an end surface ...	03/23/1993
5187983	Fiber-optic strain gauge manometer A fiber-optic strain gauge manometer and a method thereof are for measuring pressure of a fluid, to be respectively connected to a light source and a measurement apparatus. The manometer comprises: a cylindrical hollow body, acting as a pressure transduce...	02/23/1993
4901584	Method of measuring locally specific pressures A method of measuring locally specific pressures with an instrument that employs a matrix of intersecting columns and lines, each consisiting of pressure-transmitting conductors. The conductors are optical fibers. The column-associated optical fibers and ...	02/20/1990
4771640	Load introducing device A load introducing device includes a rectangular yoke having a pair of opposite flexible sides, a pair of opposite rigid sides connected to the flexible sides and a cantilever portion extending from one of the rigid sides parallel with the flexible sides....	09/20/1988
4693126	Feed roll for material web transporting and measuring web tension A feed roll for transporting a material web and measuring a web tension of the material web which is continually moved in a roller rotary printing machine. The feed roll is rotationally supported at both sides in two levers which are pivotably arranged in...	09/15/1987
4677860	Yarn tension sensor A yarn tension sensor is disclosed which is adapted for use with a textile yarn processing machine. The sensor includes a spring arm which is contacted by a running yarn, and such that the tension in the yarn acts to deflect the arm. In order to render th...	07/07/1987
4667520	Dynamometer arrangement The spaced beam and bearing arrangements each comprise a deflection beam and a support. The platform is disposed on and supported by the support for receiving and being deflected by an applied force. Thus, deflection of the platform is transmitted to the ...	05/26/1987
4577100	Temperature compensated optical pressure sensor An integrated optical pressure transducer having a diaphragm fabricated from a low-loss glass is positioned at the location where pressure changes are to be measured. An optical waveguide loop formed on one surface of the diaphragm acts as a ring cavity i...	03/18/1986
4515473	Photoelastic stress sensor signal processor A signal processor is arranged to process polarized light signals obtained from a stress sensor of the type having a photoelastic element that responds to stress by causing a phase difference between components of the polarized light propagating through t...	05/07/1985
4466295	Photoelastic sensing means Photoelastic sensing means, and more particularly photoelastic sensing means capable of providing high sensitivity for measuring pressure, force, displacement, acceleration or inertial force, proximity, temperature and other measurands. The photoelastic s...	08/21/1984
4422331	Phase modulator laser accelerometer A laser accelerometer produces an output, phase modulated beam which is polarized in a direction perpendicular to the direction from which acceleration forces are applied. In the accelerometer a laser beam is directed through a resonant cavity toward a de...	12/27/1983
4329881	Extremely sensitive force detector A device having a movable element which floats in a force field. Such placement allowing a minimum of friction. Such element is so placed that it can continuously interrupt and vary an energy field, which variation is then detected as a signal and amplifi...	05/18/1982
4253331	Force measuring device This lower link for a three-bar hitch provides a practical way to determine the tension force present in a lower link independent of any bending or other loadings. The link is formed of two bars which are bent out from each other to an intermediate point ...	03/03/1981
4155251	Laser force-measuring system biasing A biasing element for use in a force-measuring system employing a circularly polarized ring laser. The biasing element is a pre-stressed photoelastic element placed in the path of the laser beam to generate a steadystate frequency difference at the output...	05/22/1979
4118978	Thread tension gage A sensing rod and two parallel guide rods project from the housing of a thread tension gage dimensioned to be carried in one hand and operated by pressure of one finger on a push-button which causes the threat-engaging end portions of the guide rods to ad...	10/10/1978
4012953	Short term creep compensation for load cells Short term creep compensation for load cells, platform scales, bench scales and the like is achieved by introducing a thermo-couple in series with one of the output leads from the load cell and utilizing an amplified output signal derived from the origina...	03/22/1977
4010632	Piezooptical measuring transducer A piezooptical measuring transducer comprises two light sources connected to a square-pulse generator so that the luminous fluxes of each light source pass alternately through a polarizer common for both fluxes, phase-shifting plates individual for each f...	03/08/1977
3969934	Load cell amplifier A load cell of the beam type comprising an operator member having a pair of parallel longitudinally extending slots forming a central beam member and a pair of parallel bearing members spaced outwardly of the central beam member, the outer ends of the bea...	07/20/1976
3956734	Platen having a pressure-responsive transducing means for use in a signature-identifying system An apparatus which is responsive to the pressure variations inherent in an individual's act of handwriting a signature for generating electrical signals representative of these characteristic pressure variations for use in signature identification systems...	05/11/1976

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Class 73/862.624 - Using a light sensor