Visual-display device with error correction
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United States of America Patent
Stats
-
Aug 26, 1980
Grant Date -
N/A
app pub date -
Dec 28, 1978
filing date -
Dec 30, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to correct errors in the reading of a graduated scale, especially on a compass card driven by a damped gyroscopic system, the scale is juxtaposed with a block having slits simultaneously alignable with different scale graduations and illuminable by respective light sources within the block. The light sources can be selectively energized by a rotary switch whose bank contacts are connectable via a changeover switch to either of two groups of light sources for positive or negative deviations from a reference position; the slit so illuminated serves as a pointer by coacting with a confronting scale graduation.
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Cited Art Landscape
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