Matches 201 - 250 out of 355 < 1 2 3 4 5 6 7 8 >
Match Document Document Title
4944116 Sensor strip  
A sensing strip for stopping or reversing the drive of a door or other movable member having an edge along which the hollow light guide profile is provided. The sensing strip has an elongated...
4928007 Opto-electric A/D converter  
An opto-electronic A/D converter comprises an input light source, an input nterferometer, and a plurality of parallel multistable interferometers the optical lengths of which are controlled by...
4916387 Optical system for a Faraday effect current sensor  
A system for monitoring an alternating current including: a current transducer (10) having first and second optical ports (12,14) and a component for causing optical radiation to travel between the...
4900921 System and method for opto-acoustic liquid quantity measurement and transducer therefor  
The system and method provide an electrically passive optically controlled acoustic transceiver system which measures the quantity of a liquid, such as aircraft fuel, in a tank. Pulsed...
4897542 Optical pressure sensor  
A Fabry-Perot pressure or displacement sensor comprises an optical fibre which serves to transmit a light beam to the mirrors of the sensor and to receive light which is reflected back from the...
4897541 Sensors for detecting electromagnetic parameters utilizing resonating elements  
To detect a physical parameter, a resonator is connected to a body which changes in dimension when subjected to the parameter. Thus, when the body changes in dimension in response to the parameter,...
4894530 Fiber optic snap acting switch  
A snap acting fiber optic switch in which a carrier operates between two stop surfaces separated by a wedge shaped gap. A planar shutter perpendicular to the stop surfaces extends from an end of...
4886335 Optical fiber switch system  
An optical switch system used in a monitoring system for monitoring a large-scale optical transmission including a multiplicity of optical fibers, or like systems for switching optical transmission...
4878729 Optical switch  
The invention provides a simple optical switch capable of integration with common machine tool control devices such as push buttons, limit switches, and pressure responsive switches. The invention...
4870270 Fiber optic speed sensing for a rotating shaft  
A method and apparatus for monitoring the rate of rotation of a turbine engine shaft during the operation of the engine. A chopper extends radially from the shaft. Infrared radiation is passed...
4868382 Fiber-optic material sensing switch  
A material sensing switch comprising a body having an open first end and a second end closed by a wall member. A flange extends outwardly from the body at the first end thereof for securing the...
4837777 Pressure or temperature transducer  
A transducer to measure pressure or temperature comprising a quantity of compressible material such as gas and a quantity of incompressible material such as liquid and proper means (16,17) to...
4829165 Optical control systems  
A control system suitable for incorporating in control panels and effecting remote control of apparatus includes a light guide bus system including input and output light guides and optical...
4816669 Process for signal processing of reflected pulses and an apparatus for performing the process  
When examining optical fibers it may be of interest to determine the location of a reflection point along the fiber. A process for time localization of reflected pulses is described, at least two...
4814604 Opto-electronic method and system for remote detection of physical magnitudes  
The optoelectronic method and system provides for remote detection of physical magnitudes by multiplexing and demultiplexing signals from a plurality of sensors. The system utilizes a single source...
4814930 Optical zero-phase current and zero phase voltage sensing arrangement  
An apparatus for detecting an accident of electric wire lines a single light emitting element, a plurality of optical sensor heads arranged respectively to the lines to be observed, for modulating...
4810051 Optical fiber modulator  
A method of modulating light in a optical fiber is disclosed. Light is launched into a multimode fiber in a restricted group of fiber modes. Disturbances placed in the fiber modulates the light...
4800266 Fiber optic sensor with light sampling for referencing  
The invention is an optical fiber sensor system in which an optical source, such as a laser diode, emits a pulse of optical energy which is transmitted in an optical path through an optical energy...
4796966 Magnetically activated fiber optic switch  
A fiber optic switch is provided for regulating light transmission comprising an encasing movement body surrounding a paramagnetic shaft, a section of which protrudes therefrom. A spring member...
4789213 Electro-optical modulator having a monomode light waveguide modulator  
An electro-optical modulator has a monomode light waveguide modulator for which a pressure-sensitive signal generator is provided as a signal source for the purpose of modulating a light power...
4778248 Pressurized optical cable equipped to detect and locate pressure losses that might affect it  
A pressurized optical cable equipped for the detection and location of losses of pressure that might affect it is equipped with a source for creating a light signal and injecting it into one of the...
4775637 An immunoassay apparatus having at least two waveguides and method for its use  
The unit consists of a cuvette and light guiding means comporting more than one waveguide element in contact with the solution to be analyzed. During operation, signals issuing from said waveguide...
4767164 Fiber optic rotation rate encoder  
A reflective optical wheel speed transducer system is disclosed. The system utilizes a single optical fiber to transmit light to a pair of interrupter discs, and to collect light reflected from the...
4766306 Apparatus with illuminated actuator for photoelectrically controlling a load  
Apparatus for controlling a load has a load operating circuit, two radiation sources, a photodetector which is responsive to radiation from one of the sources to change the condition of the...
4757194 Methods and apparatus for sensing the mechanical application of force  
A probe for sensing the mechanical application of force is described wherein the terminus of at least one optical fiber is provided at a preselected distance from a reflective surface. The...
4755054 Multichannel, optical-fiber-based spectrometer  
An optical-fiber-based spectrometer utilizes a compact, P-C-board-mountable optical multiplexer which permits multiple channels of reference and measurement data from remote and hostile...
4750015 Waste toner container detector  
A detector mechanism for detecting the condition when a waste toner container is full of waste toner. A piston is provided which moves in response to the waste toner pressure in the waste toner...
4743753 Method and apparatus for carrying out fiber optic time domain reflectomery wherein Golay complementary sequences are applied  
A measurement is carried out on a medium that propagates energy in a selected form by applying energy in the selected form to the medium, the power varying as a function of time in accordance with...
4743752 Fiber optic remote sensor  
An optically driven, electromagnetically oscillating resonant sensor subjected to a stress force wherein the optical driving energy and the optically communicated signal generated in response to...
4743787 Brush wear indicator having variable light energy conductor path  
A brush wear indicator for a dynamoelectric machine, such as a direct current motor, comprises a fiber optic conductor coupling an emitter and a detector. The fiber optic conductor is fed into a...
4739163 Position locating optical coder utilizing optical fiber  
A position locating optical coder is provided formed by a sensor which includes a reader, for reading a code carrying element a pivoting micromirror actuated under the control of the output of the...
4737624 Optoelectric distance measuring apparatus with an optical measuring probe with shared optics  
In an optoelectric distance measuring apparatus, short light pulses emitted by a laser diode are directed via a measuring probe (2) against a target object (9). The light signals reflected are...
4731530 Joystick control having optical sensors  
An electromechanical control for use with a joystick lever which swivels along x and y axes simultaneously. The control has a light source and two light sensitive phototransistors. The light source...
4713540 Method and apparatus for sensing a measurand  
Vibrating resonant mechanical structures are excited optically by photokinetic energy transfer and detected optically. In particular, a tuning fork sensor measuring a physical parameter is excited...
4703174 Fiberoptic temperature/pressure sensor system  
A fiberoptic sensing system comprising a light source, a sensor responsive to external stimulus, an optical fiber connected to the light source and the sensor, a detector arranged to receive light...
4701751 Pool alarm system  
An alarm system for a swimming pool or the like whereby small inexperienced children or animals are detected prior to entering the pool or after an unauthorized entry into the water of the pool....
4698497 Direct current magneto-optic current transformer  
A drift free magneto-optic current transformer for measuring an electric current which may include a d-c component in which two orthogonally polarized light beams are passed through a magneto-optic...
4694162 Sign bit optical-electrical geophone  
An optical-electrical geophone which generates a binary signal is described. The geophone utilizes an optical fiber for the return transmission of a light source in the geophone. The geophone...
4694161 Fluid flow and level detector  
The invention is directed to the use of magnets and fiber optics for detecting fluid flow and fluid levels. In general, the invention employs a permanent magnet movable by fluid flow or by the...
4687927 Pressure measuring system  
A pressure measuring system wherein light is transmitted from a light source via a first optical fiber to a pressure-receiving diaphragm having a reflecting surface which undergoes a deflection in...
4687928 Position detector  
A position detector for use with a code carrier which defines a position and has alternating radiation transmissive and non-transmissive regions which define a multi-bit output is disclosed. The...
4683374 Method and means for multiplexing optical sensors  
Apparatus for optically multiplexing the signals of several optical sensors when those sensors are of the type which utilize a single light input optical fiber for each sensor to send light to the...
4678905 Optical sensors for detecting physical parameters utilizing vibrating piezoelectric elements  
To detect a physical parameter such as pressure, temperature, acceleration or force, the physical parameter is allowed to influence the movement of a light transmitting piezoelectric member. Light...
4678902 Fiber optic transducers with improved sensitivity  
Fiber optic transducers are constructed from a single optical fiber wherein the geometry of the fiber is altered such as by introducing a bend or curve area in the fiber adjacent to the exit end of...
4672197 Photosensor employing optical guide posts to detect an object in the path  
A plurality of optical guide paths are built in a guide path plate. A plurality of optical guide posts are erected on the guide path plate so that each may oppose to one end of the corresponding...
4670649 Optical transducer and measuring device  
An optical transducer for producing a measurement signal which is modulated in accordance with the position of a physically movable member in the form of a modulating mirror and which also produces...
4668861 Tactile sensor employing a light conducting element and a resiliently deformable sheet  
A tactile sensing device for use in robotics and medical prosthetics includes a transparent sheet-like element and a second resilient sheet-like element positioned adjacent the first transparent...
4654523 Light-reflector type encoding method and the encoder  
A light-reflector type encoding method which comprises emitting light from one end of an optical fiber to a mobile body which moves relatively to said end of the optical fiber, through an optical...
4651074 Robotic sensor  
A robotic sensor incorporates an array of closely spaced force sensors which are carried on a mounting plate. The front surface of this mounting plate is brought into contact with the object under...
4649271 Fiber-optic acceleration sensor with photoluminescent material  
A fiber-optic sensor for sensing dynamic acceleration is arranged so that the acceleration gives rise to changes in angle between at least one body and the optical axis of at least one lens of...
Matches 201 - 250 out of 355 < 1 2 3 4 5 6 7 8 >