Reflective compass device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 11, 2001
Grant Date -
N/A
app pub date -
Nov 30, 1999
filing date -
Nov 30, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A light-reflective device for determining positional information relative to an external magnetic field having a housing, a light-reflective compass assembly, a light generating and detecting assembly, a processor, and a display. The light-reflective compass assembly further includes a balanced disk magnet mounted on a compass card. The compass card includes a reflective pattern representative of the position of the housing with respect to the external magnetic field. The reflective compass assembly reflects light generated by the light generating and detecting assembly back toward the light generating and detecting assembly. The light generating and detecting assembly generates a signal representative of the position of the housing relative to the external magnetic field. The processor processes the signal received from the light generating and detecting assembly to determine the position of the housing relative to the external magnetic field and outputs the position to the display.
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Cited Art Landscape
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