Patent US3790712A successfully refreshed from Google Patents.
US3790712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic stethoscope system
Assignee: Computer Medical Science Corp
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Filing: 1972-02-24
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Granted: 1974-02-05
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Expires: 1992-02-24
Abstract
Abstract A method and apparatus for the detection of heart sounds and fidelity reproduction for diagnostic purposes including a pick-up or sensing device which has an annular projection forming a pickup head with a cone-shaped interior and also has a dynamic microphone. The pick-up head has a lip configuration such that a frequency range of between 20 and 1000 cps can be detected with adequate intensity. A dynamic microphone operates a class ''''A'''' amplifier to provide amplification without signal distortion. Multiple distribution of detected sound is contemporaneously and simultaneously available to listeners, and at the same time the sound can be recorded on tape. Sound analysis with respect to frequency content and amplitude is made as well as comparison to predetermined heart malfunctions for clinical diagnosis.
Inventors
- 👤 F Andries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:04
CPC Classifications
A; A61; A61B; A61B7/00; A61B7/02; A61B7/04; H; H04; H04R; H04R1/00; H04R1/46; H04R9/00; H04R9/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
267 words
An electronic pick-up device comprising: a hollow housing member constructed from a plastic material and including an exterior, cylindrically shaped pick-up portion and an interior, ring-shaped portion, said interior ring-shaped portion being disposed within said pick-up portion, said exterior and interior portions being in alignment along a common axis, said interior portion defining an interior cylindrically-shaped recess, said pick-up portion having an outer curvilinear surface and an inner, conically formed surface, which surfaces join to form a cylindrically formed outer edge, said conically formed surface extending from said outer edge to a central opening in said housing member, said conically formed surface defining an exterior recess, said central opening placing said exterior and interior recesses in communication with one another, said ringshaped portion being connected to the interior of the housing members at a location intermediate of said conically formed surface so that an interior ''''V'''' shaped groove is formed between the inner wall of said conically formed surface and said ring-shaped portion, a complementarily ''''V'''' shaped plastic member sized to fit in said ''''V'''' shaped groove, said plastic member having a flat surface which is perpendicular to said ring-shaped portion when said plastic member is in said groove, said flat surface lying in the same plane as said central opening, a dynamically responsive transducer disposed in the interior recess of said ring-shaped portion and centered with respect to said central opening, and a pressure bleed passage extending at right angles through said ring-shaped portion, said bleed passage being located between said transducer and said flat surface and opening to the interior of said hollow housing member.
Claim 2
Dependent Claim
267 words
An electronic pick-up device comprising: a hollow housing member constructed from a plastic material and including an exterior, cylindrically shaped pick-up portion and an interior, ring-shaped portion, said interior ring-shaped portion being disposed within said pick-up portion, said exterior and interior portions being in alignment along a common axis, said interior portion defining an interior cylindrically-shaped recess, said pick-up portion having an outer curvilinear surface and an inner, conically formed surface, which surfaces join to form a cylindrically formed outer edge, said conically formed surface extending from said outer edge to a central opening in said housing member, said conically formed surface defining an exterior recess, said central opening placing said exterior and interior recesses in communication with one another, said ringshaped portion being connected to the interior of the housing members at a location intermediate of said conically formed surface so that an interior ''''V'''' shaped groove is formed between the inner wall of said conically formed surface and said ring-shaped portion, a complementarily ''''V'''' shaped plastic member sized to fit in said ''''V'''' shaped groove, said plastic member having a flat surface which is perpendicular to said ring-shaped portion when said plastic member is in said groove, said flat surface lying in the same plane as said central opening, a dynamically responsive transducer disposed in the interior recess of said ring-shaped portion and centered with respect to said central opening, and a pressure bleed passage extending at right angles through said ring-shaped portion, said bleed passage being located between said transducer and said flat surface and opening to the interior of said hollow housing member.
Claim 3
Dependent Claim
36 words
The apparatus of claim 1 wherein said passage is sized relative to the volume defined by said pick-up portion to provide a short pressure time constant relative to a 20 to 1,000 cps range of frequencies.
Claim 4
Dependent Claim
49 words
The apparatus of claim 2 and further including class ''''A'''' electrical amplifying means in said housing member and coupled to said transducer, said amplifying means having an electrical jack connector and an aligned opening in said housing whereby a jack connector may be selectively coupled to said amplifying means.
Claim 5
Dependent Claim
72 words
The apparatus of claim 3 and further including headset means, said headset means including an integrally formed base member having a recess, a headset transducer in said recess which is matched in response characteristics to the transducer in the housing member and electrically coupled to said amplifying means, and sound tubes having ear plugs for reception in a set of ears, said sound tubes being received in openings in said base member.
Claim 6
Dependent Claim
27 words
The apparatus of claim 4 wherein flat spring members are disposed in said base member and sound tubes for resiliently biasing said sound tubes toward one another.
References Cited (Backward Citations)
US2755336A
Cited
US3160708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |