Measuring cable travel sensor for sensing travel of a moveable body under differential pressure conditions
AssigneeASM Automation Sensorik Messtechnik GmbH
InventorKlaus-Manfred Steinich
Life of this patent
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Abstract
A measuring cable travel sensor for detecting the position of a movable body and operable under differential pressure comprises a cable drum for winding on and off a measuring cable, a spring for prestressing the cable drum to wind on the measuring cable and a rotary position sensor for detecting the position of the cable drum. The sensor has a differential pressure chamber which is under the differential pressure and in which a cable eye for connection of the cable to the movable body is arranged, a cable chamber in which the cable drum is arranged and a spring chamber in which the spring is arranged. The differential pressure chamber communicates at least with the cable chamber and the spring chamber.
Claims24
A measuring cable travel sensor for sensing the travel of a movable body, for use under differential pressure conditions, comprising
- a measuring cable,
- a connecting means on the measuring cable for connection thereof to said body,
- a cable chamber,
- disposed in said cable chamber a cable drum for winding on the measuring cable,
- a spring chamber,
- disposed in the spring chamber a spring for prestressing the cable drum for winding on the measuring cable,
- a rotary position sensor for sensing the rotary position of the cable drum,
- a differential pressure chamber which in, use is under, differential pressure and in which the cable connecting means is arranged, and
- means communicating the pressure of the differential pressure chamber at least with the cable chamber and with the spring chamber.
Dependencies are inferred from the claim text.