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Document Title |
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5297917 |
Method of acting remotely in a mine shaft, in particular in a site for deep storage of nuclear wastes
A method of remote control of a mobile carriage including at least one transmit and receive antenna for movement into an underground gallery connected to the surface by a shaft provided with an...
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4109205 |
Frequency modulation signalling system employing an electrical filter device
An electrical fail-safe filter consists of a transistor amplifier with a frequency-selective positive feedback circuit such as a resistance capacitance network shunting the collector and emitter of...
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RE28867 |
Moving object communication control system
A communication system between mobile and wayside stations wherein the mobile stations are traveling on a track which is divided into sections by means of an open-type transmission line paralleling...
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3871302 |
TROLLEY CONTROL SYSTEM
A transmitting device mounted on a trolley vehicle for operation within an underground mine transmits a first coded signal through an overhanging transmission line that extends through the mine...
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3848914 |
MOTOR SHIFTABLE SHOCK ABSORBING BUMPER
A vehicular safety system including manual or automatic sensor armed bumper extension and retraction apparatus employs high pressure hydraulic or explosion actuator means for dissipating the...
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3808426 |
ELECTROMAGNETIC SIGNALLING SYSTEM
A signalling system comprises a trackway which is divided into a plurality of sequential signalling sections, a transmitter is arranged in each of said sections and transmits signalling information...
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3790780 |
METHOD AND MEANS FOR VARYING THE SPEEDS OF VEHICLES MOVING ALONG A TRACK
In the disclosed method and system, vehicles travelling along a track in gle file transmit signals to the following vehicles and receive signals from the preceding vehicles. The information content...
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3784813 |
TEST APPARATUS FOR PNEUMATIC BRAKE SYSTEM
An apparatus for cyclical testing in integrity of a railway pneumatic brake system. A transmitter and receiver with associated induction loops are situated on opposite sides of the track, and are...
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3781687 |
WIRELESS COMMUNICATION SYSTEM FOR RAILWAY VEHICLE INCLUDING AN OPEN TYPE TRANSMISSION LINE MOUNTED ON A RADIOWAVE ABSORBENT SUPPORT
A communication system for eliminating interference in communications between a fixed station and a mobile vehicle. The fixed station includes a support base for supporting an open type...
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3766378 |
MOVING OBJECT AUTOMATIC OPERATION SYSTEM
A moving object automatic operation system wherein moving objects travelling along a route are operated automatically in accordance with the data derived from the signal detected by an antenna...
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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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3735398 |
BASE BAND SHORT RANGE PRE-COLLISION SENSOR FOR ACTUATION OF VEHICLE SAFETY APPARATUS
A vehicle safety apparatus includes a radio means for the detection of an impending collision immediately prior to contact of the vehicle with another object and for actuation of restraining or...
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3694751 |
INDUCTION RADIO TRANSMISSION SYSTEM
An induction radio transmission system for vehicles wherein three spaced conductors are installed in parallel along the vehicle path with a generator feeding an in-phase signal electric current to...
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3691463 |
LEAKAGE WAVEGUIDE LINE FROM WHICH ENERGY IS CONTINUALLY LEAKED ALONG THE PATH FOLLOWED BY THE LEAKAGE WAVEGUIDE LINE
A leakage waveguide line in which a circular to rectangular converter is connected to the end of a circular leakage guide. A relay amplifier is connected to the rectangular waveguide, one end of...
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3659094 |
MOVING OBJECT COMMUNICATION SYSTEMS
Radio interference of a moving object communication system, wherein radio communication is between ground stations and a moving object such as a train, with other communication systems which is...
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3648172 |
CIRCULAR LEAKY WAVEGUIDE TRAIN COMMUNICATION SYSTEM
A circular leaky waveguide comprising a metal tube or of a helix waveguide which is provided with a row or a plurality of rows of leakage apertures, each aperture having maximum diameter smaller...
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3609675 |
MICROWAVE COMMUNICATION SYSTEM FOR MOVING LAND VEHICLE
The microwave communication system, in its preferred form, includes a stationary waveguide through which microwave energy flows in surface waves in the fundamental mode. The waveguide preferably is...
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3590383 |
TRAIN COMMUNICATIONS SYSTEM INVOLVING FLUID SIGNAL SHIELDING MEANS
A hollow metallic device surrounds an antenna fixed to the moving car of the train, and a substance, which absorbs or reflects electromagnetic wave energy, is discharged therefrom in two paths on...
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3546593 |
RECEIVER FOR FREQUENCY MODULATED RADIO-FREQUENCY SIGNALS
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3544788 |
POSITION INDICATION AND CONTROL SYSTEM FOR RAIL VEHICLE
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3466651 |
SIGNALLING SYSTEM
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3408646 |
System for localizing trains along a track
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3392388 |
Combination system for obstacle detection and communication for vehicles
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3377587 |
Train operation control system and method of operating the same
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3305682 |
Ranging system
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3297868 |
Railway crossing signal systems
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3281779 |
Position detecting means for vehicles
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3281591 |
Induction wireless communicating system
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3268727 |
Computer control for transit system
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3263073 |
Electronic railway equipment
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3250914 |
Zone control system
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3235025 |
Collision prevention system
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3218452 |
Railway track switch control system
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3210726 |
Multiple vehicle brake actuated automatic stop light warning system
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3205352 |
Presence detector
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3201583 |
Safety process and apparatus for railway services
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3169733 |
Battery charging system for vehicles
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3167282 |
Railroad warning device
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3165171 |
Control system for wheel flange lubricators
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3105120 |
Unidirectional triggering system for highway communications
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3087440 |
Control circuit
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3085201 |
Electronic speed measuring apparatus
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3078944 |
Vehicle control systems
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3077164 |
Station selector apparatus for conveyor installations
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3072785 |
Remote control system for vehicles
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3054100 |
Signalling system
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3046392 |
Control circuits
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3042136 |
Electronic speed control system for motor vehicles and roads
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3041448 |
Automatic train operation system
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3035167 |
Railway track circuit
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