Spirometer calibration device and associated displacement detect

Details Spirometer calibration device and associated displacement detect Spirometer calibration device and associated displacement detect

1979-11-19

1982-04-13

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01F 2500

Patent

active

043241271

ABSTRACT:
A device for calibrating a Spirometer includes a hand driven syringe having magnetic elements displaced along the shaft of the syringe piston at intervals corresponding to designated volumes. A Hall effect transducer senses the passage of the magnetic when the syringe piston is actuated and transmitts pulses to a timer so that average rate of flow delivered by the syringe can be derived.

REFERENCES:
patent: 1234505 (1917-07-01), Stillman
patent: 3199630 (1965-08-01), Engle et al.
patent: 3403544 (1968-10-01), Francisco
patent: 3877287 (1975-04-01), Duntz
patent: 4112408 (1978-09-01), Roozenbeck
patent: 4152922 (1979-05-01), Francisco

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