Geometrical instruments – Distance measuring – Environmental isolation
Patent
1994-06-15
1996-01-23
Wirthlin, Alvin
Geometrical instruments
Distance measuring
Environmental isolation
33706, G01B 1102
Patent
active
054856809
ABSTRACT:
An encapsulated measuring apparatus for determining the relative position of two objects is disclosed which comprises a measurement embodiment, a probing means, a hollow member, a seal, an entrainment member, an installation pedestal and at least one additional seal, wherein the measurement embodiment, together with the probing component probing same, is placed into the hollow member, which is closed by means of the seal through which passes the entrainment member which connects the probing component with an object to be measured. The entrainment member is connected, with the installation pedestal. A space between the hollow member and the installation pedestal is shielded against harmful effects from the surroundings by the at least one additional seal. The at least one additional seal is effective outside of a region where the entrainment member passes through its corresponding seal.
REFERENCES:
patent: 3579836 (1969-05-01), Kraus et al.
patent: 4477726 (1984-10-01), Reichl
patent: 4492033 (1984-04-01), Ichikawa
patent: 4580346 (1986-04-01), Reichl
patent: 4982508 (1991-01-01), Nelle et al.
Dr. Johannes Heidenhain GmbH
Wirthlin Alvin
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