MOBILE GAS LEAK DETECTION

• US 3,444,721 A
• Filed: 05/02/1963
• Issued: 05/20/1969
• Est. Priority Date: 05/02/1963
• Status: Expired due to Term

• Current Assignee: Daniel P. Hearn, David D. Stedman
• Original Assignee: Daniel P. Hearn, David D. Stedman
• Inventors: Hearn, Daniel P., Stedman, David D.
• Application Number:
  US04/277,604
• Time in Patent Office: 2,210 Days
• US Class Current: 73/23.2
• CPC Class Codes: G01M 3/20 using special tracer materials, e.g. dye, fluorescent material, radioactive material

Claims

1. IN A GAS DETECTOR THE COMBINATION WHICH COMPRISES:

(A) A VEHICLE FOR MOVING ALONG A SURFACE TO BE SURVEYED, (B) A GAS SEARCH ARRAY SUPPORTED FROM SAID VEHICLE NEAR THE EARTH'"'"''"'"'S SURFACE INCLUDING A PLURALITY OF FUNNELS INTERCONNECTED BY A DUCT NETWORK, (C) LARGE DUCT MEANS INCLUDING A SUCTION FAN FOR DIRECTING GAS FROM SAID NETWORK THROUGH SAID DUCT, (D) A SMALL CONDUIT HAVING ONE END OPENING INTO THE STREAM IN SAID DUCT FOR DIVERTING A FRACTION OF THE FLOW FROM SAID DUCT TO SAID CONDUIT, (E) A HIGH IMPEDANCE HYDROGEN FLAME DETECTOR CELL, (F) A PRESSURIZING PUMP FOR RECEIVING GAS FROM SAID CONDUIT, (G) GAS TRANSMISSION MEANS INCLUDING A PRESSURE REGULATOR CONNECTING SAID PUMP TO SAID CELL, (H) A RECORDER HAVING MEANS FOR RECEIVING AND DRIVING A RECORDING CHART PAST A RECORDING POINT, AND (I) HUMIDITY AND TEMPERATURE REGULATED MEANS FOR CONNECTING SAID CELL TO SAID RECORDER TO RECORD AS A DEPENDENT VARIABLE VARIATIONS IN THE CHARACTER OF GAS IN SAID CONDUIT.