Rotary displacement transducers

Details Rotary displacement transducers Rotary displacement transducers

1989-03-22

1991-02-05

Cuchlinski, Jr., William A.

Geometrical instruments

Miscellaneous

Light direction

33 1N, 33793, G01B 524, G01D 504

Patent

active

049893297

ABSTRACT:
A rotary displacement transducer comprises a shaft rotatably supported in a housing, and to which the rotary displacement to be sensed is applied. The shaft is axially fixed in the housing, and has a precision screw thread formed over part of its length. An internally threaded sleeve coaxially surrounds the shaft in threaded engagement with the precision screw thread, the sleeve carrying a collar having two diametrically opposed radial projections. The first projection carries a roller which engages in a slot in the housing to prevent the collar and sleeve rotating as the shaft is rotated, so that rotation of the shaft causes the sleeve and collar to move axially of the shaft by an amount dependent on the rotary displacement to be sensed. The axial movement of the collar is sensed by a linear displacement transducer of the LVDT type coupled to the other radial projection on the collar.

REFERENCES:
patent: 1070973 (1913-08-01), MacGregor
patent: 1419004 (1922-06-01), Allen
patent: 2059141 (1936-10-01), Pillischafske
patent: 2789362 (1957-04-01), Maroth
patent: 3190007 (1965-06-01), Nicola et al.
patent: 3546930 (1970-12-01), Flarsheim
patent: 4369578 (1983-01-01), Ernst
patent: 4495700 (1985-01-01), Ernst
patent: 4586259 (1986-05-01), Kato
patent: 4636792 (1987-01-01), Watson
patent: 4779473 (1988-10-01), Grady et al.

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