Accession Number : ADD016107

Title :   Relative Motion Pinwheel.

Descriptive Note : Patent, Filed 5 Oct 91, patented 30 Nov 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Streimer, Gary E ; Benda, Leslie P

Report Date : 30 Nov 1993

Pagination or Media Count : 6

Abstract : An apparatus for visualizing relative motion between two moving objects in a two-dimensional plane is provided. A planar base has a first compass rose printed thereon. Rotatably attached to the center of the first compass rose is a means for indicating a present course of a first moving object relative to a true bearing indication on the first compass rose. A second moving object assembly consists of a second compass rose rotatably attached to a means for indicating a present course of the second moving object relative to a true bearing indication on the second compass rose. The true bearing indication on the second compass rose is aligned to be equivalent to the true bearing indication on the first compass rose. Attached at the centers of the first and second compass roses is a means for tethering the second moving object assembly to the first compass rose. The second compass rose is free to rotate about its center and the second moving object assembly is free to revolve in a single plane around the center of the first compass rose. The tethering means indicates a lint of relative bearing from the first moving object to the second moving object.

Descriptors :   *PATENTS, *BEARING(DIRECTION), *COMPASSES, ASSEMBLY, MOTION, TETHERING, TWO DIMENSIONAL, ROTATION

Subject Categories : Direction Finding
      Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE