Accession Number:

ADD009547

Title:

Compass Checker.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1982-04-20

Pagination or Media Count:

7.0

Abstract:

A device is disclosed for generating a rotatable magnetic field for calibrating a compass. The field generated overcomes the earths magnetic field and any other nearby magnetic field. A U-shaped housing has a first calibrated dial on the top horizontal member and a dial on the bottom horizontal member. The dials are mechanically linked to rotate in unison. Each dial contains a pair of bar magnets. The compass to be tested in positioned within the interior of the U-shaped housing. An adjustment knob is provided for turning the top and bottom dials and thereby permitting orientation of the four magnets within a range of 360 deg. The accuracy of the compass can thereby be tested. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE