Stethoscope

Details Stethoscope Stethoscope

1976-08-31

1978-01-31

Cooper, William C.

Surgery

Truss

Pad

128 205S, A61B 704

Patent

active

040716945

ABSTRACT:
A combination acoustic and electronic stethoscope which can be operated with one hand is disclosed. The stethoscope has a combination slide valve-electrical switch located in the chestpiece for conversion from an acoustic to an electronic mode of operation. The microphone for the electronic mode is located in the chestpiece and the speaker is located in the Y connector of the earpieces. A volume control and frequency selector control are operative in the electronic mode.

REFERENCES:
patent: 3087016 (1963-04-01), Dahl
patent: 3160708 (1964-12-01), Andries
patent: 3247324 (1966-04-01), Cefaly
patent: 3539724 (1970-11-01), Keesee

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