Optical adjustment knob with spaced apart platforms

Details Optical adjustment knob with spaced apart platforms Optical adjustment knob with spaced apart platforms

1975-10-09

1978-01-03

Henry, Jon W.

350 44, G02B 706, G02B 704

Patent

active

040663299

ABSTRACT:
A center-focus binocular with a focus knob having a flattened upper surface which is easily contacted by fingertips on both hands of the user when the binocular is held in a normal viewing position. The knob motion is like that of a treadle or seesaw, and the user's finger motion is dominantly linear and opposite. The fingers of opposite hands apply opposing forces to the knob for smooth and accurate movement, and the knob is coupled to ocular lenses of the binocular through a steep cam for rapid, short-stroke focus adjustment.

REFERENCES:
patent: D240268 (1976-06-01), Hunkenback
patent: 3540792 (1970-11-01), Akin

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