The best way to record the speed of a train at the side of a track in a remote location is to measure the time required for the train to travel a fixed distance. Recent developments of this type of instrument have centered around methods of improving scale shape; however a different approach to the problem of producing a linear scale when measuring the time to travel a known distance, is made in a new recorder designed by Everett Edgcumbe and Co. Ltd., of Hendon. This contains a simple analogue computer, the output of which is a current directly proportional to speed. The present instrument operates on a timing distance which may be varied between 100 and 200 yards or between 75 and 150 yards. However, the same computer system could be used for a speed recorder operating on a base length of from 1 to 3 ft. although this would make the instrument somewhat more expensive.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Authors:
    • Axworthy, F R
  • Publication Date: 1951-2-9

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 152-154
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00039584
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 4 1994 12:00AM