Device for controlling the drive and forward feed of microtomes,

Details Device for controlling the drive and forward feed of microtomes, Device for controlling the drive and forward feed of microtomes,

1991-04-10

1993-01-26

Phan, Hien H.

Cutting

With means to monitor and control operation

83414, 83703, 83915005, G01N 106, B26D 520

Patent

active

051814439

ABSTRACT:
A device for controlling the drive and forward feed of a microtome, particularly an ultramicrotome, includes a driving motor for moving a specimen or knife and a servomotor for generating a forward feed of the specimen towards an edge of the knife or vice versa. A high travelling speed of the specimen needed for rapid initial cutting is coupled to a high rate of forward feed. One single switching operation is performed, for instance, by a snap-engaging step switch via relay switches. The driving motor and the servomotor can be simultaneously switched over to pairs of values which correspond to subsequent rough cutting and ultra-thin cutting. Individual values for cutting speed and forward feed are separately preselected, readjusted, and read from a display. Selected program stages are indicated by signals.

REFERENCES:
patent: 3785234 (1974-01-01), Sitte
patent: 4377958 (1983-03-01), Leighton
patent: 4484503 (1984-11-01), Sitte et al.
patent: 4625608 (1986-12-01), Behme et al.

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