David I Laney

US Patent:

40819124, Apr 4, 1978

Filed:

Jun 24, 1977

Appl. No.:

5/809537

Inventors:

David F. Laney - Norman OK

International Classification:

G01C 1712

US Classification:

33272

Abstract:

A device for taking and plotting magnetic bearings which includes an elongated straight edge device having numerical graduated indicia along one edge thereof, and a housing receiving said straight edge. A magnetic compass is mounted on the straight edge, and the housing includes folding portions adapted to enclose and protect the magnetic compass. A pair of sight pins are removably attachable to the compass and straight edge to provide a line of sight extending through the pivot point of the magnetized needle of the compass.