Cutting – With means to convey work relative to tool station – Plural passes of diminishing work piece through tool station
Patent
1983-07-14
1984-11-27
Yost, Frank T.
Cutting
With means to convey work relative to tool station
Plural passes of diminishing work piece through tool station
83412, 83563, 839155, G01N 106
Patent
active
044845030
ABSTRACT:
A microtome, especially an ultramicrotome, is disclosed in which a forward-feed system for the specimen arm and/or knife of the microtome comprises a stepping motor which is controlled by a pulse generator and which shifts the specimen arm, and the knife, relative to each other by an appropriate amount of forward feed in accordance with a forward-feed value which is set at one of a plurality of preselector switches. In order to facilitate quick switching over from one forward-feed amplitude to another, permitting the selection of forward-feed amplitudes which differ by an order of magnitude, for example, if semi-thin sections are to be produced during a run of ultra-thin sections, the forward-feed amplitudes set by the preselector switches can be switched, according to choice, to the pulse generator for the stepping motor by means of a changeover switch. This arrangement enables the operator to alter the forward-feed amplitude by one manual action without disturbing the ongoing operation.
REFERENCES:
patent: 3496819 (1970-02-01), Blum
patent: 3845659 (1974-11-01), Wikefeldt et al.
patent: 4331054 (1982-05-01), Williams et al.
Bilek Walter
Sitte Helmuth
C. Reichert Optische Werke AG
Raines Stephen
Spencer Alan H.
Yost Frank T.
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