The testing is reported of semi-automatic controls for earthmoving equipment which is expected to increase productivity by 35 percent. The control devices can be retrofitted on graders, scrapers and bulldozers. The modified laser control system installed on a grader consists of separate controls for blade elevation and angle. A 12-volt rotating laser beam transmitter mounted on a movable post at the site controls blade elevation which is said to be accurate within 0.25 in. The grader carries a receiver and carries an operating range 70 acres. Automatic control of a scraper operated by an overspeed/underspeed governor. Blade elevation is a function of scraper velocity. A bulldozer's blade elevation and speed are similarly controlled. Blade angle is determined automatically or can be pre-set using a rotating laser control system like that developed for the grader.

  • Availability:
  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 1974-10-24

Media Info

  • Features: Photos;
  • Pagination: p. 13
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00264895
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM