Measuring cord displacement transducer with shell-like housing

Details Measuring cord displacement transducer with shell-like housing Measuring cord displacement transducer with shell-like housing

1996-06-03

1998-06-09

Bennett, G. Bradley

Geometrical instruments

Distance measuring

By flexible tape

33762, G01B 310

Patent

active

057618224

ABSTRACT:
The invention relates to a measuring cord displacement transducer. A sealed measuring cord displacement transducer is proposed which has a measuring cord, a cord drum, a flat spiral spring which, with the cord drum, is arranged coaxially in a rotationally fixed manner on the same shaft, having a rotary encoder connected to the shaft and a housing surrounding the displacement transducer with a mechanical interior and an electrical interior which are separate and spaced apart axially in the longitudinal direction of the shaft, so that the cord drum and the flat spiral spring can be accommodated in the mechanical interior and the rotary encoder and the associated electronics can be accommodated in the electrical interior. In this case, the housing of the mechanical interior is formed by two shell-like, respectively one-piece bearing shells. As a result of the accommodation of the mechanical part of the measuring cord displacement transducer in one-piece, half-shell-like bearing shells instead of the previously used construction of tubular sections, end plates and intermediate plates, improved fitting accuracy, stability and hence improved tightness are achieved. As a result of the two bearing shells fitting into each other in a positively locking manner in the axial and radial direction, the mounting of the measuring cord displacement transducer, above all of the mechanical part, is considerably simplified.

REFERENCES:
patent: 3780440 (1973-12-01), Taylor
patent: 4178691 (1979-12-01), Tateishi
patent: 4186490 (1980-02-01), Quenot
patent: 4575944 (1986-03-01), Lin
patent: 4587738 (1986-05-01), Kang
patent: 4790492 (1988-12-01), Atobe
patent: 5286972 (1994-02-01), Falk et al.

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