Electrical audio signal processing systems and devices – Stethoscopes – electrical
Patent
1983-11-04
1986-10-21
Rubinson, Gene Z.
Electrical audio signal processing systems and devices
Stethoscopes, electrical
128715, A61B 502
Patent
active
046189866
ABSTRACT:
An electronic stethoscope is disclosed having a palm sized electronic component case with operating switches provided on opposite sides of the case for ease of operation. The stethoscope includes a pickup head coupled to an electronic microphone by means of a flexible tubular acoustic member. A battery powered amplifier and filter circuit is provided within the component case and the amplified and filtered output of the microphone is coupled to a miniature speaker sealed within an airtight container within the case. A rotatable tubular member having radial apertures therein is coupled through the sealed container and out each side of the component case. A binaural headpiece is acoustically coupled to each end of the rotatable member and is thus free to rotate with respect to the case, allowing the stethoscope to fold for storage. In a preferred embodiment of the present invention, electronic timing means are provided for automatically removing electrical power from than amplifier circuit after a predetermined period of time and for generating an audible tone at preselected intervals for pulse rate measurement.
REFERENCES:
patent: 3160708 (1964-12-01), Andries
patent: 3247324 (1966-04-01), Cefaly
patent: 3539724 (1970-11-01), Keesee
patent: 3989895 (1976-11-01), O'Daniel
patent: 4071694 (1978-01-01), Pfeiffer
patent: 4254302 (1981-03-01), Walshe
patent: 4377727 (1983-03-01), Schwalbach
patent: 4438772 (1984-03-01), Slavin
patent: 4534058 (1985-08-01), Hower
Rubinson Gene Z.
Schroeder L. C.
The Hart Group
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