Linear position transducer

Geometrical instruments – Distance measuring – Convertable to another type measuring means

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Details

33DIG13, 242376, 738661, G01B 702

Patent

active

055601189

ABSTRACT:
A linear position transducer (10) including a housing (12), a threaded stud (56) fixedly secured within the housing, a rotatable drum (26) thread-mounted on the threaded stud, a string (18) secured to the drum and extending from the housing, a torsion spring (80) attached to the drum providing retraction torque to the drum, a cantilever beam (28) having one end fixed to the housing and the other end biased against the drum, and a strain gauge (48) for measuring deflection-induced strain in the cantilever beam. The drum moves axially along the threaded stud as it rotates in response to linear movement of the string. As the drum moves axially, it deflects the cantilever beam, which deflection is detected by the strain gauge. The strain is proportional to the linear movement of the free end of the string.

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