GRADE-CROSSING MOTORIST WARNING SYSTEM

The patent describes a railroad-highway grade-crossing warning system accomplished by control circuitry for synchronizing the flash rates of incandescent and xenon lamps so as to produce a continuously uniform signal pattern which can be rapidly identified and understood by a motorist.

• Supplemental Notes:
  • Supersedes PB-239 605. This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of patent available Commissioner of Patents, Washington, D.C. 20231 $0.50.
• Corporate Authors:

  Department of Transportation

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hopkins, J B
• Publication Date: 1975-3-3

Media Info

• Pagination: 7 p.

Subject/Index Terms

• TRT Terms: At grade intersections; Electric circuits; Flashing; Incandescent lamps; Intersections; Lamps; Logic circuits; Patents; Railroad grade crossings; Railroads; Traffic signal control systems; Warning systems; Xenon
• Uncontrolled Terms: Synchronization
• Old TRIS Terms: Control circuits; Synchronism
• Subject Areas: Highways; Railroads; Safety and Human Factors;

Filing Info

• Accession Number: 00143796
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: PAT-APPL-555 021 Patent
• Files: TRIS, USDOT
• Created Date: Nov 17 1977 12:00AM