Pneumatic radius sensor

Details Pneumatic radius sensor Pneumatic radius sensor

1980-05-27

1982-11-30

Yasich, Daniel M.

Measuring and testing

With fluid pressure

Dimension, shape, or size

73 375, 226 97, B65H 1732, G01B 1300

Patent

active

043610293

ABSTRACT:
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.

REFERENCES:
patent: 2636379 (1953-04-01), Van Dorn
patent: 3186326 (1965-06-01), Schmidt
patent: 3201985 (1965-08-01), Williams
patent: 3327916 (1967-06-01), Weidenhammer et al.
patent: 3439536 (1969-04-01), Cushman
patent: 3630170 (1971-12-01), Christo
patent: 3754443 (1973-08-01), Hyer
patent: 4041770 (1977-08-01), Staheli et al.

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