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Respiration Transducer

IP.com Disclosure Number: IPCOM000096765D
Original Publication Date: 1963-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Willis, GR: AUTHOR

Abstract

To facilitate the measurement of respiration of a human being, resilient chest band 10 is detachably connected at one end to opaque housing 15 and at its other end, to spring loaded rod 20, extending into housing 15. The other end of rod 20 is connected to mirror 25 which is wholly contained within housing 15.

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Respiration Transducer

To facilitate the measurement of respiration of a human being, resilient chest band 10 is detachably connected at one end to opaque housing 15 and at its other end, to spring loaded rod 20, extending into housing 15. The other end of rod 20 is connected to mirror 25 which is wholly contained within housing 15.

Lamp 30 and light sensitive device 35 are mounted within 15 on opposite sides of light barrier 40. Cable 45 connects lamp 30 to a power source. Device 35 is connected to load resistor 50 which is connected between ground potential and 35. The output of 35 is connected to amplifier 55, whose output connects to counter 60.

By this arrangement, as a subject breathes, mirror 25 is moved away from and toward lamp 30 and device 35. Thus, a series of pulses are developed corresponding to the breathing rate. These are counted by counter 60. Opaque housing 15 shields device 35 from all ambient light. Light barrier 40 shields 35 from direct light waves from lamp 30.

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