A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
128/115
A61B 17/14 (2006.01) G01N 1/06 (2006.01)
Patent
CA 1188945
MICROTOME HAVING A FORWARD-FEED CONTROL SYSTEM FOR THE SPECIMEN ARM AND/OR THE KNIFE ABSTRACT OF THE DISCLOSURE 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.
431652
Bilek Walter
Sitte Helmuth
Macrae & Co.
Reichert (c.) Optische Werke Ag
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