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4025791 |
Object identification system
A transponder/interrogator system for remotely identifying objects. The interrogator emits infrared pulses to activate and remotely clock the transponder. Upon such activation, the transponder...
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3978321 |
Portable hand-carried automobile counting device
A portable hand-carried battery-operated electronic automobile counting device designed for counting automobiles entering a paid parking area as a check on attendant's collection of parking fees....
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3964063 |
Traffic-surveillance system
A traffic-surveillance system comprises a radar equipment coupled to a transmitter/receiver antenna. This antenna is formed by a transmission line including an elongate hollow conductor with...
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3958781 |
Train vehicle protection apparatus including signal block occupancy determination
There is disclosed a train vehicle protection apparatus including the determination of train vehicle occupancy of a track circuit signal block, wherein a frequency tone speed code signal is...
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3906492 |
System for the surveillance of objects moving along a route
A system for the surveillance of a route along which vehicles are moving, and which operates in real time, comprises radar equipment whose transmitter and receiver are each connected to a leak line...
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3906436 |
Detection system for the location of moving objects
Radio signals generated from a transmitter mounted on a moving object are induced into a plurality of crossed pairs of lines and into a reference pair of parallel lines. The difference in phase...
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3901468 |
Logic backup for a train detection system in an automatic block system
The backup train detection system described herein distinguishes false from true block occupancies and recursively decides whether to set a true or a false occupancy latch whenever an occupancy...
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3875525 |
Digital automatic oscillator tuning circuit
A railroad train moving along an approach to a grade crossing (or other location of interest) is detected by apparatus that is responsive to the change in effective track inductance caused by the...
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3872283 |
Vehicle identification method and apparatus
Identification of vehicle types, such as types of aircraft, by identifying unique characteristics of the "footprint" presented by the configuration of wheels unique to a particular type of vehicle....
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3840848 |
MULTIPLE VEHICLE GAP DETECTION AND INTERVAL SENSING SYSTEM
Beams of radiant energy, such as from infrared transmitters, are directed in paths downwardly onto a traffic lane to impinge upon associated receiver units that are transversely spaced in the...
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3838270 |
DIGITAL MOTION DETECTOR
A railroad train moving along an approach to a grade crossing (or other location of interest) is detected by apparatus that is responsive to the change in effective track inductance caused by the...
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3835449 |
METHOD AND APPARATUS FOR CLASSIFYING THE TIRE WIDTH OF MOVING VEHICLES
The method of arranging a row of tire sensing devices across about half a traffic lane, arranging the devices into groups whose length is no greater than the difference in width between the...
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3801976 |
TRANSMISSION LINE PRESENCE SENSOR
A high frequency generator-receiver system for detecting the presence or proximity of objects including persons or vehicles employs continuous wave transmission of high frequency electromagnetic...
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3786411 |
DEVICE FOR DETECTING LOCATION OF A MOVABLE BODY
A device for detecting the location of a moving body comprising an antenna or antennae provided on the moving body. A fundamental and a plurality of other conductor pairs extend in parallel along...
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3778761 |
VEHICLE ORIENTATION DETERMINATION
This invention relates to a device for determining the orientation of a vehicle so that this information can be used to correlate automatic vehicle control equipment to signalling information being...
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3758775 |
RAILROAD CROSSING SIGNALLING SYSTEM
Disclosed is a highway-railroad crossing signalling system utilizing microwave telemetry to convey control information from a remote sensing location to a receiver coupled to an active motorist...
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3739333 |
VEHICLE LANE OCCUPANCY COMPUTER FOR TRAFFIC CONTROLLER
The invention is concerned with computing the percentage of a total time period that a particular point on a roadway is occupied by vehicles. Pulses generated by a clock generator are fed to a...
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3733597 |
PROXIMITY DETECTOR AND ALARM UTILIZING FIELD EFFECT TRANSISTORS
A proximity detector and alarm in which an antenna is connected to the gate f a metal oxide semiconductor field effect transistor (MOSFET) which causes a silicon controlled switch (SCS) to trigger...
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3731067 |
MONITORING APPARATUS FOR DETECTING THE PASSAGE OF OBJECTS PAST A POINT
Apparatus for use with coded-vehicle identification systems for detecting the passage of the ends of railroad cars past a detection point. The apparatus determines the time interval between passage...
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3720913 |
WARNING AND COURTESY DISPLAY SYSTEM FOR MOTOR VEHICLE OPERATORS
A display for notifying a motorist that his headlights are not on and/or for conveying other courtesy information comprises means for sensing proximity of a vehicle, means for sensing ambient...
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3705976 |
REVENUE CONTROL SYSTEM FOR TOLL ROADS
A system for automatically reconciling the revenues collected, with the vehicle type and distance travelled over a toll road. The system is applicable to a barrier type configuration where the...
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3701102 |
NOISE ERROR CORRECTING AND EXCESSIVE NOISE REJECTING SYSTEM
A noise error correcting and excessive noise error rejection system for use preferably in an identification interrogation system in which a scanned or swept frequency spectrum is transmitted and...
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3662330 |
FAIL-SAFE VEHICLE DETECTOR SYSTEM
Primary and secondary vehicle sensors are utilized to detect vehicles moving along a roadway, this information being available for use in a traffic control system. Primary and secondary counters...
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3659261 |
METHOD AND APPARATUS FOR IDENTIFYING ENGINES IN A TRAIN OF RAILWAY VEHICLES
A system for identifying engines in a mixed train of standard four-, six-, and eight-axle railway cars and engines while coupled and in motion. First, second, third, and fourth axle detectors are...
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3626413 |
TRAFFIC SURVEILLANCE AND CONTROL SYSTEM
An all-weather system utilizing doppler radar devices for monitoring traffic on highways to provide warnings and diversionary information to motorists. Radar equipment mounted on gantries at...
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3614729 |
VEHICLE-DETECTING APPARATUS USING ELECTROMAGNETIC WAVE
An all solid-state microwave vehicle-detecting apparatus specially equipped with time-setting circuits to attain a high accuracy in registering the number of moving vehicles on a roadway, said...
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3605081 |
SEQUENCE DETECTOR FOR RAILWAY VEHICLE CONTROL SYSTEM
An axle sequence detector for detecting a unique sequence of actuation of four railway track switches or actuators. Of all the possible sequence combinations, it responds to only one, actuating a...
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3594720 |
SOLID-STATE TRAFFIC CONTROLLER
A controller for traffic lights employing solid-state components and providing both vehicular and pedestrian control. Cross street controls initiate operation of a binary counter sequentially to...
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3546696 |
SPORTS COMPUTER SYSTEM
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3532886 |
MOVING OBJECT DETECTOR USING DIFFERENTIALLY COMBINED OPTICAL SENSORS HAVING INTERSECTING AXES
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3466598 |
APPARATUS FOR PROGRAMMING TRAFFIC FLOW PATH ROUTES
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3457546 |
APPARATUS FOR CONTROLLING TRAVELLING OBJECTS,AND MORE PARTICULARLY MOTOR VEHICLES,AT INTERSECTING TRACKS OR ROADS
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3419847 |
Low bridge warning device for vehicles
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3350547 |
Counting circuit for traffic detection pulse inputs at random pulse rates temporarily exceeding the average rate
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3346842 |
Vehicle detectors
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3339061 |
Traffic zone surveillance computer
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3295119 |
Inactivity sensing circuit
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3268863 |
Directional radar detector control
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3206722 |
Traffic control system for drive-in banks and the like
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3161876 |
Pulse doppler radar system
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3152315 |
Aircraft tracking and indicating system
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3142816 |
Vehicle identification device
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3122740 |
Velocity determining device
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3115622 |
Panoramic scanning counter
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3103655 |
Proximity responsive switching system
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3086109 |
Train wheel proximity detector
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3056106 |
Infrared detectors
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3018475 |
Responder device
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2965893 |
Vehicle detector
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2954462 |
Vehicle length detector
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