Limit switching apparatus with defined overtravel for specimen protection on microscopes with motorized focusing drive
AssigneeLeica Mikroskopie und Systems GmbH
InventorsUlrich Kaczynski, Roland Hedrich
Life of this patent
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Abstract
A limit switching apparatus with defined overtravel for specimen-objective protection on microscopes having a motorized focusing drive. A stored focus position or position of the specimen stage can be overtraveled by a fixed amount. The maximum travel path of the specimen stage is additionally limited by a switching rod and a short-circuiting switch, in order to ensure reliable specimen-objective protection even in the event of a fault in the control electronics.
Claims8
A limit switching apparatus for limiting movement of a motorized focusing drive, comprising:
- a microscope having a movable specimen stage;
- a switching rod accommodating an actuating pin;
- and
- an electric switch arranged together with the actuating pin of the switching rod;
- wherein the actuating pin is non-positively connected to the specimen stage of the microscope and a free working distance is provided between the actuating pin and the electric switch for a defined overtraveling of a stored focusing position.
A limit switching apparatus for limiting movement of a motorized focusing drive for a microscope having a movable specimen stage, comprising:
- a switching lug arranged on the specimen stage;
- a switching rod accommodating an actuating pin;
- and
- a fork light barrier arranged together with the switching rod;
- wherein the actuating pin is non-positively connected to the specimen stage of the microscope and a free working distance is provided between the switching lug and the fork light barrier for a defined overtraveling of a stored focusing position.
Dependencies are inferred from the claim text.