Focus adjusting device for binocular
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 22, 1986
Grant Date -
N/A
app pub date -
Aug 15, 1983
filing date -
Aug 20, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A binocular belonging to one type is provided with a focus adjusting device which allows one to select a desired ocular lens feed rate. A single annular piece is included in the device to be rotated by a manually operated focus adjusting ring to in turn drive a shaft associated with ocular lens barrels in a reciprocal movement. A bunch of such exchangeable annular pieces are prepared each being formed with a helical slot which differs in pitch from helical slots in the others.
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Family
International Classification(s)
Cited Art Landscape
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