A French National Railways tunnel contour measuring device known as Castan is described. The apparatus has a number of rollers carried at the ends of a series of arms. These roll along the tunnel walls as the apparatus moves along the track and their undulations are used to influence pens which register the variations on a continuous moving paper band. The Castan apparatus sections of tunnels, low or narrow portions of arches, projecting points of rock, or structures too near the line can be recognized at once.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Publication Date: 1957-3-1

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 247-248
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00037728
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM