Coarse/fine adjustment coaxial handle for feeding microscope sta

Details Coarse/fine adjustment coaxial handle for feeding microscope sta Coarse/fine adjustment coaxial handle for feeding microscope sta

1988-10-07

1990-04-24

Herrmann, Allan D.

Machine element or mechanism

Shaft operators

Plural speed

74 1054, 74 8915, 74479, 475323, 350530, G02B 2126, F16H 3706, G05G 1100

Patent

active

049190016

ABSTRACT:
The coarse/fine adjustment coaxial handle for feeding microscope stage comprises a feed screw shaft, a tubular member rotatably fitted over the feed screw shaft and equipped with a disc plate fixed thereto, a fine adjustment handle rotatably fitted over the tubular member and surrounding the disc plate, a reduction gear mechanism interposed between the feed screw shaft and the fine adjustment knob, a first frictional resistance imparting mechanism for imparting frictional resistance to the tubular member, second frictional resistance imparting mechanism for imparting frictional resistance to the disc plate, and a coarse adjustment handle pivoted to an eccentric position on another disc plate connected to the disc plate. The coarse/fine adjustment coaxial handle permits very fine stage feeding without fail and coarse adjustment smoothly with simple operations.

REFERENCES:
patent: 3019705 (1962-02-01), Wilkinson
patent: 3355955 (1967-12-01), Aller
patent: 3683704 (1972-08-01), Kuroha
patent: 4173902 (1979-11-01), Shio

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