Microtome having a handwheel for driving a specimen holder

Details Microtome having a handwheel for driving a specimen holder Microtome having a handwheel for driving a specimen holder

1985-02-28

1986-07-08

Yost, Frank T.

Cutting

With means to convey work relative to tool station

Plural passes of diminishing work piece through tool station

74 8922, 74763, 74810, 839155, G01N 106

Patent

active

045986215

ABSTRACT:
A microtome comprises a handwheel which can be rotated in two directions of rotation, and drive means for the purpose of driving a specimen holder, so that the specimen holder executes a cutting movement when the handwheel is rotated in one direction, and a resetting movement when the handwheel is rotated in the other direction. The cutting and resetting movements take place relative to a cutting knife. A reduction gearing arrangement enables the speed of the cutting movement to be reduced relative to the speed of the resetting movement without having to rotate the handwheel at a correspondingly lower rate. A catch enables the reduction gearing arrangement to be bridged so that the speed of the cutting movement and resetting movement are equal for any given rate of rotation of the handwheel.

REFERENCES:
patent: 316594 (1965-01-01), Smith
patent: 1026280 (1912-05-01), Ott
patent: 3212379 (1965-10-01), McCormich et al.
patent: 4479402 (1984-10-01), Reichel et al.

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