Clip-on compass

Details Clip-on compass Clip-on compass

1981-06-03

1983-09-20

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Attaching means

33355R, 33 1SD, G01C 1704

Patent

active

044047525

ABSTRACT:
The invention is in the field of compass course following and comprises a means and method of mounting a compass directly on a map with a North-South reference line and following a course on the map directly once the compass needle is aligned with North. In all references to the direction "North" throughout this document magnetic North only shall apply.

REFERENCES:
patent: 742472 (1903-10-01), Mosses
patent: 1304789 (1919-05-01), Marion
patent: 1680998 (1928-08-01), Krantz
patent: 2487044 (1949-11-01), Cude
patent: 2603896 (1952-07-01), Bennett

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