Patent ID: 6240647
Filing Date: 2001-06-05
Classification: G01B,G01C

Abstract:
An orienteering compass for movement over a map from an arbitrary point A to an arbitrary point B to determine the distance from point A to point B, said compass comprising a distance measuring device comprising a base, an axis rotatably coupled to said base and having a screw thread, a circular element being rotatable over said map and being secured to said axis such that rotating the circular element rotates the axis, a pointer rotatably coupled to and moveable along the screw thread in response to rotation of the circular element, and the base being provided with at least one measuring scale, said pointer being non-rotatably disposed relative to the base and being moveable along the measuring scale to indicate the distance from point A to point B, said base comprising a base plate including an edge, a recess along said edge, and a planar bottom surface to be placed on the map when taking a distance measurement, the circular element not being disposed within said recess, and the pointer being disposed within the recess, and the base plate comprising bearings for rotatably receiving said axis, said circular element having a radius R1, and said bearings being disposed at a distance X1 from the bottom surface, the distance X1 being greater than radius R1 of the circular element.