Adjustable magnetic compass

Details Adjustable magnetic compass Adjustable magnetic compass

1995-10-02

1996-06-25

Will, Thomas B.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33364, G01C 1738

Patent

active

055288375

ABSTRACT:
An adjustable magnetic compass for adjustably compensating for the magnetic variation between magnetic north and map north. The adjustable compass includes a compass dial having directional indicia applied thereto, and a lubber line for operative alignment relative to the directional indicia. The lubber line can be rotatably adjusted relative to the directional indicia so as to visually compensate for the magnetic variation between magnetic north and map north with respect to the geographic location in which the adjustable magnetic compass is to be located.

REFERENCES:
patent: 1195300 (1916-08-01), Wagner
patent: 1401205 (1921-12-01), Suter
patent: 1794964 (1931-03-01), Knutson
patent: 2358589 (1944-09-01), Piffath
patent: 2506885 (1950-05-01), Noxon
patent: 2857679 (1958-10-01), Bleu
patent: 3177591 (1965-04-01), Jolley
patent: 3813792 (1974-06-01), Jarvenpaa
patent: 3919782 (1975-11-01), Vaucher
patent: 4438568 (1984-03-01), Kramer et al.
patent: 4899453 (1990-02-01), Bhat et al.
patent: 4920656 (1990-05-01), Cross
The Boy Scout Handbook, Robert C. Birkby, Tenth Edition, pp. 186-192, 1990.
"Weems Marine Navigation", 1940, p. 39.
"Pocket Ref", Thomas J. Glover, Sequoia Publishing Inc., 1989, p. 360.

Affiliated with

Also associated with

Rating

Adjustable magnetic compass does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjustable magnetic compass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable magnetic compass will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2180362