Pneumatic radius sensor

Details Pneumatic radius sensor Pneumatic radius sensor

G - Physics

01

B

33/140

G01B 13/00 (2006.01) B65H 26/08 (2006.01) G01B 13/08 (2006.01) G11B 15/46 (2006.01)

Patent

CA 1136849

ABSTRACT OF THE DISCLOSURE A pneumatic radius sensor is embodied in a fluid bearing, such as an air bearing for a tape transport, to determine the radius of tape wrapped on an adjacent supply or take up reel. The sensor includes a chamber in fluid communication through a plurality of metered orifii to the region of the changing wrap angle of the tape on the air bearing, the plurality of orifii being arranged to provide an essentially linear relationship between pressure in the chamber and the wrap angle of the tape. Pressure sensing means in the chamber senses the pressure therein, so the radius of tape on the adjacent reel can be determined.

369919

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