System for detecting hot elements on railway vehicles

• US 3,253,140 A
• Filed: 04/04/1962
• Issued: 05/24/1966
• Est. Priority Date: 04/04/1962
• Status: Expired due to Term

• Current Assignee: Henry C. Sibley, John A. Snell, Robert B. Haner
• Original Assignee: Henry C. Sibley, John A. Snell, Robert B. Haner
• Inventors: Sibley, Henry C., Haner, Robert B., Snell, John A.
• Application Number:
  US04/186,597
• Time in Patent Office: 1,511 Days
• US Class Current: 246/169.00D
• CPC Class Codes: B61K 9/06 by detecting or indicating heat radiation from overheated axles
• CPC Class Codes: B61L 1/20 Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
• CPC Class Codes: Y10T 24/1457 Metal bands

Claims

8. IN A SYSTEM FOR DETECTING OVERHEATED ELEMENTS ON RAILWAY VEHILCES MOVING ALONG A STRETCH OF TRACK COMPRISING, DETECTOR MEANS POSITIONED ALONG SAID TRACK ADAPTED TO RESPOND TO INFRARED RADIATION EMANATING FROM ELEMENTS AND TO PROVIDE DIRECT CURRENT VOLTAGE OUTPUT SIGNALS WHICH VARY IN MAGNITUDE ACCORDING TO THE TEMPERATURES OF THE ELEMENTS SCANNED, DIRECT CURRENT AMPLIFIER MEANS RESPONSIVE TO THE VARIATIONS IN MAGNITUDE OF SAID DETECTOR OUTPUTS FOR PROVIDING AN AMPLIFIER DIRECT CURRENT OUTPUT THEREOF, SAID AMPLIFIER MEANS INCLUDING A FEEDBACK CIRCUIT FROM SAID AMPLIFIERD OUTPUT FOR INSURING THAT THE AMPLIFIED OUTPUT IS REPRESENTATIVE OF THE DIRECT CURRENT DETECTOR OUTPUT, GATING MEANS CONTROLLED BY THE POSITION OF EACH PASSING WHEEL FOR DEMARCATING AN INTERVAL DURING WHICH SAID DETECTOR MEANS IS RESPONSIVE TO INFRARED ENERGY EMANATING FROM A PARTICULAR ELEMENT, AND OUTPUT MEANS CONTROLLED BY SAID GATING OUTPUT AND SAID AMPLIFIED OUTPUT FOR REGISTERING DISTINCTIVE INDICATIONS OF TEMPERATURE CONDITIONS OF SAID ELEMENTS.