Matches 301 - 350 out of 610 < 1 2 3 4 5 6 7 8 9 10 11 12 13 >
Match Document Document Title
4894528 Laser beam lawn tennis net referee  
Low intensity laser oscillators produce precisely located beams on each side of the net detected by laser receivers on the opposite end of the net along with appropriate electronics to monitor and...
4893005 Method and apparatus for area and perimeter security with reflection counting  
An apparatus and method for detecting disturbance in a protected area or perimeter by scanning the area or perimeter with a rotating beam of radiating energy, such as light, infrared, ultraviolet...
4879461 Energy field sensor using summing means  
An energy field disturbance sensor comprises an energy field emission means such as a light emitting diode; the emitted field may contain a time-varying component. An energy sensing device such as...
4878896 Cassette optical identification apparatus for a medication infusion system  
A cassette identification system for use with a medication infusion system having disposable cassettes which are mounted onto a main pump unit is disclosed which uses an optical sensor module to...
4870267 Ambient light sensitive activator  
An activation signal is generated when an aircraft passes directly overhead and may be employed to record aircraft noise levels or to trigger a zenith camera for producing a photograph of the...
4868543 Remote mailbox alarm system  
A remote mailbox alarm system comprising a mailbox unit (10) and a house module (14) is disclosed. The mailbox unit (10) comprises a position-sensitive door switch (22) which activates timer...
4864121 Light curtain with periodic light transmitter arrangement  
A light curtain apparatus is described which does not require a mechanically moving light deflecting element such as a mirror wheel. Instead a number of diodes (11') are arranged in a row (11) and...
4855608 Laser curtain having an array of parabolic mirrors each focusing radiation on a corresponding detector positioned in mirror's focal point  
A laser beam fanned into a triangular plane configuration by mirrors, succeeding additional mirrors focusing the laser curtain rays back onto a spot, the spot having a light detecting, electrical...
4855717 Security device for conveying systems with unmanned vehicles  
A security device for monitoring unmanned vehicles within an area, the device comprising at least two oppositely directed light barriers associated with the area. Each light barrier includes a...
4853531 Apparatus for controllng the opening and/or closing of high-speed shutter doors  
The apparatus is utilized to detect disturbance created in an opening by objects even when the objects do not move so that they cannot be detected by a motion detector. The apparatus includes a...
4851661 Programmable near-infrared ranging system  
A high angular resolution ranging system particularly suitable for indoor plications involving mobile robot navigation and collision avoidance uses a programmable array of light emitters that can...
4851662 Refrigerator ice dispenser light with photosensitive switch  
A refrigerator ice dispenser light having a control including a photosensitive switch which applies half wave rectified line voltage when there is little or no ambient room light thereby dimly...
4841141 Optical coordinates inputting apparatus having switching means to operate y-axis light emitters when operation of the x-axis emitters outputs a coordinates signal  
An optical coordinates inputting apparatus which has a light emitting element array and a photodetector array opposed to the light emitting element array, arranged in X- an Y-axis directions,...
4841283 Security hinge utilizing concealed radiative sensing to detect hinge position  
A hinge construction having radiative emitter and detector concealed within the body of the hinge's knuckles so as to be in communication with each other when the hinge leaves, and therefore the...
4837430 Photoelectric touch panel having parallel light emitting and detecting arrays separated by a light shield  
A photoelectric touch panel has light emitting and light sensing elements mounted on the same circuit board located at one side of the panel and a reflector is placed on an opposing side of the...
4829174 Flexible tube optical intrusion detector  
A hollow flexible vinyl or other plastic tube having a shiny inner wall is disposed along a boundary where intrusion detection is desired. A beam of infrared radiation from an LED at one end of the...
4822996 Ice bin level sensor with time delay  
A circuit for controlling an automatic ice making system of a refrigeration apparatus. The device includes an electrical circuit which operates the ice making machine using a light interrupter...
4818887 Arrangement for the recognition of obstacles for motor vehicles  
An arrangement for the recognition of obstacles for motor vehicles with a transmitter and a receiver for electromagnetic radiation which are directed to an examination area (close range) that...
4818866 Intrusion detection system for operating industrial machines with variable sensitivity  
An optical detection system of the sort adapted to enable and/or disable the operation of an associated industrial machine when an appropriate intrusion is detected. The optical intrusion detection...
4816667 Reflection light barrier employing adjacent lenses having bordering pupils  
A reflection light barrier has a light transmitter/receiver (14) having two adjacent front lenses (18, 19) for the transmitted and received light respectively. A triple reflector (13') is arranged...
4812643 Detector device for a blade tracking system having two sensors  
The present invention relates to a detector for a blade tracking system. The detector comprises a lens for focusing in a plane a bundle of radiation passing therethrough. Two or more radiation...
4803373 Conveyor arm apparatus with gap detection  
A conveyor arm apparatus unloads one by one a plurality of wafers which are stored in a holding chamber such that a surface of one wafer faces a back surface of another wafer at a predetermined...
4797547 Optical fibre monitoring device using a synchronization selector to channel optical signals  
An improved optical fiber monitoring system using a light-emitting diode which is controlled by a module 12 having an oscillator 40, a first JK trigger 42, two univibrators 44, 46 and a second JK...
4797548 Reflection light bearer system with self-testing feature  
A reflection light barrier with a measuring light emitter which emits light nto a space to be monitored, and with a measuring light receiver which receives light reflected from an object present in...
4789775 Optical scanner  
An optical reader control system includes a source of radiant energy mounted above a checkout counter and detecting means mounted adjacent an aperture in the supporting surface of the counter...
4788439 Multiple detector fog suppression and edge enhancement  
A proximity sensing system and signal processing method are disclosed for detecting target objects from a movable vehicle while protecting against false target detection due to the presence of fog,...
4786800 Fluid drop detection and discrimination system  
A system and method is provided for detecting the presence of drops in a fluid drop path, such as that in a medical infusion system, and for discriminating between signals resulting from true drops...
4770527 Photoelectric-piezoelectric velocity and impact sensor  
A photoelectric-piezoelectric velocity and impact sensor has a plurality of photoelectric light sources and associated photodetectors disposed on axes defining an array of light beams. A first...
4763903 Target scoring and display system and method  
An automatic target shooting system for determining projectile location relative to a target, calculating a score based upon the location, and displaying a replica of the target with an indication...
4762990 Data processing input interface determining position of object  
The location of an object in a work area is established by sweeping a single light beam over the area and employing in coordinate calculations the rotational arc of the light source, and the serial...
4761550 Scanning system for optical coordinate input device with scan interrupt control  
A scanning system for an optical type coordinate input device comprises a plurality of light emitting elements and photoreceiving elements opposed to each other and a coordinate detection section...
4751983 Load lifting device load sensing  
Sensors associated with load carrying members are inaccurate, incorrectly sense the position of the load, and are subject to impact forces which cause premature sensor failure. A load lifting...
4745275 Sensor circuit  
A sensor circuit including a current-driven type sensor for detecting changes in a predetermined state and control means having an input applied discontinuously with the output signal of the sensor...
4743772 Method for determining the position of an object in an automated production process and a device for carrying out the method  
A method for determining the position of an object located on a carrier relative to a normal position, in an automated production process includes reflecting a light beam off an object and its...
4742221 Optical coordinate position input device  
An optical coordinate input device comprises a number of light emitting elements and corresponding light detecting elements disposed in a plurality of linear arrays. A light ray selection member is...
4739160 Optical coordinate data entry device with integral lens and spacer  
An optical coordinate data entry device mounted on the face of a display device. The entry device comprises an array of light-emitting devices, an array of light-receiving devices corresponding to...
4737625 Arrangement structure of plural rows of overlapping optical elements  
An arrangement structure of optical elements is characterized in that light emitting and/or light receiving optical elements are mounted on a substrate in a zigzag fashion, whereby the resolving...
4737634 Filter for photoelectric touch panel including light scattering or absorbing protrusions  
A filter for a photoelectric touch panel disposed in front of arrays, formed on a framework on the circumference of a screen, of aligned light emitting elements and photosensitive elements...
4736098 Signalling method and apparatus for a conventional shopping cart  
A signalling device for detecting and signalling the presence of articles on the bottom package tray (20) of a shopping cart as the shopping cart is moved through an aisle adjacent a checkout...
4736097 Optical motion sensor  
An optical motion sensor comprises first and second light emitting diodes that emit complementary pulsed beams of infrared energy within a sensing region. A photodiode sums the energies to produce...
4730108 Ambient light insensitive circuit with frequency matching  
An optical sensing circuit useful for detecting the end of a moving tape in a tape transport includes a light source and a light sensor which are closely spaced across a gap. The radiation output...
4727962 Movable sensing apparatus  
Movable sensing arrangements are prone to damage, unable to position a load engaging device relative to a load for stacking purposes, and unable to controllably position the sensing arrangement. A...
4726322 Milking apparatus  
The milking apparatus does not need the continuous presence of the dairy farmer. A mobile member coupled with a teat cup follows the free movements of one or more teats of a cow by means of...
4726587 Optical bowling pin sensor  
An optical bowling pin detector wherein light reflecting from the top five inches of each pin is directed to a linear array of photosensitive devices by an anamorphic lens. The detector is...
4719453 Card carrier having an alarm  
The present invention provides a card carrier such as a wallet for reducing the occurrence of loss of a card such as a credit card. The card carrier includes an arrangement for receiving a card and...
4716298 System for automatically detecting presence or absence of a preceding vehicle and method therefor  
A system for detecting the presence or absence of a vehicle in front of a subject vehicle and method therefor, wherein a plurality of wave transmitters transmit distance measuring media such as...
4709142 Target detection in aerosols using active optical sensors and method of use thereof  
An active optical sensing device and method which uses a transmitter to transmit directional electromagnetic radiation and a plurality of detecting devices for receiving radiation reflected off of...
4709143 Photoelectric bin level sensor and method of installing the same  
A photoelectric bin level sensor comprising a housing from which projects a source probe and a detector probe, the source probe and the detector probe both are bent at an angle of approximately 100...
4680462 Fluid drop detection system  
A system detecting the presence of successive drops of fluid in a fluid path has a system input for connection to a photoelectric transducer so situated as to have a change in electrical output on...
4678901 Optical sensor for monitoring cigarette groups  
During the packaging of cigarettes, cigarette groups (10) assigned to a pack are checked to ensure that all the cigarettes are present. For non-contact monitoring, optical transmitters (22) and...
Matches 301 - 350 out of 610 < 1 2 3 4 5 6 7 8 9 10 11 12 13 >