Limit switching apparatus with defined overtravel for specimen p

Details Limit switching apparatus with defined overtravel for specimen p Limit switching apparatus with defined overtravel for specimen p

1992-04-03

1994-05-24

Luebke, Renee S.

Electricity: circuit makers and breakers

Limit switch

2003321, 359392, H01H 316, G01N 2900

Patent

active

053150805

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.

REFERENCES:
patent: 2713407 (1955-07-01), Miller
patent: 3721759 (1973-03-01), Lang
patent: 4480163 (1984-10-01), Morris et al.
patent: 5034583 (1991-07-01), Benz et al.
Patent Abstracts of Japan, vol. 9243, 30 Sep. 1985, Abstract of JP 60 097 265, Fumio for "Protection Apparatus of Ultrasonic Microscope".
Patent Abstracts of Japan, vol. 9243, 30 Sep. 1985, Abstract of JP 60 097 266, Jiyunichi for "Protection Apparatus of Ultrasonic Microscope".
Patent Abstracts of Japan, vol. 9246, 03 Oct. 1985, Abstract of JP 60 098 361, Jiyunichi for "Protective Device of Ultrasonic Microscope".

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