Protective housing for accommodating a scale member and a longit

Details Protective housing for accommodating a scale member and a longit Protective housing for accommodating a scale member and a longit

1990-09-07

1992-01-14

Cuchlinski, Jr., William A.

Geometrical instruments

Distance measuring

Environmental isolation

33703, G01B 1104

Patent

active

050798502

ABSTRACT:
A protective housing for accommodating a scale member and a longitudinally movable scanning unit of a length measuring system comprises a housing tube, which is adapted to support the scale member and preferably has a basically rectangular cross-section and in one narrow side wall is formed with a slot, which is adapted to receive an actuating member, which is adapted to be coupled to the scanning unit, and which housing tube is adapted to be closed at both ends by end closures, which are adapted to hold the housing in position and protrude beyond the ends of the housing tube. In order to facilitate the assembling, sealing and aligning each end closure is integrally formed with an end core, which comprises an inner end portion, which conforms to the inside surface of the housing tube, each end closure also comprises an end block having a shoulder abutting the end face of the housing tube, and each end closure is formed between said inner end portion and said shoulder with a peripheral groove, which accommodates a sealing element.

REFERENCES:
patent: 4165564 (1979-08-01), Burkhardt
patent: 4170829 (1979-10-01), Nelle
patent: 4320578 (1982-03-01), Ernst
patent: 4570347 (1986-02-01), Miller
patent: 4584773 (1986-04-01), Reider et al.

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