Vehicle detectors
First Claim
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1. APPARATUS FOR DETECTING PASSAGE OF A VEHICLE COMPRISING A SEMICONDUCTOR, A CASING INCLUDING AN INSULATING DIELECTRIC, SAID SEMICONDUCTOR INCLUDING EMITTER, COLLECTOR AND BASE POSITIONED IN SAID DIELECTRIC WITHIN SAID CASING, MEANS FOR MOUNTING SAID CASING WITHIN A ROADWAY, SAID DIELECTRIC BEING A PRESSURE-TRANSMITTING MEANS FOR TRANSMITTING VIBRATIOSN FROM SAID CASING TO SAID SEMICONDUCTOR, MEANS FOR BIASING SAID EMITTER IN ONE DIRECTION, OUTPUT MEANS INCLUDING A REVERSE BIASED DIODE AND A TERMINAL CONNECTED TO SAID COLLECTOR WHEREBY VIBRATIONS CAUSED BY THE PASSAGE OF A VEHICLE ON THE ROADWAY ARE TRANSMITTED TO SAID SEMICONDUCTOR TO GENERATE A PULSE AT SAID OUTPUT TERMINAL.
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1 Claim
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1. APPARATUS FOR DETECTING PASSAGE OF A VEHICLE COMPRISING A SEMICONDUCTOR, A CASING INCLUDING AN INSULATING DIELECTRIC, SAID SEMICONDUCTOR INCLUDING EMITTER, COLLECTOR AND BASE POSITIONED IN SAID DIELECTRIC WITHIN SAID CASING, MEANS FOR MOUNTING SAID CASING WITHIN A ROADWAY, SAID DIELECTRIC BEING A PRESSURE-TRANSMITTING MEANS FOR TRANSMITTING VIBRATIOSN FROM SAID CASING TO SAID SEMICONDUCTOR, MEANS FOR BIASING SAID EMITTER IN ONE DIRECTION, OUTPUT MEANS INCLUDING A REVERSE BIASED DIODE AND A TERMINAL CONNECTED TO SAID COLLECTOR WHEREBY VIBRATIONS CAUSED BY THE PASSAGE OF A VEHICLE ON THE ROADWAY ARE TRANSMITTED TO SAID SEMICONDUCTOR TO GENERATE A PULSE AT SAID OUTPUT TERMINAL.
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Current AssigneeHarold A. Dixon
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Original AssigneeHarold A. Dixon
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InventorsDixon, Harold A.
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Application NumberUS04/453,541Time in Patent Office903 DaysField of SearchUS Class Current340/933CPC Class CodesG08G 1/042 using inductive or magnetic...
