US3132208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic stethoscope
Assignee: Bell Aerospace Corp
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Filing: 1961-06-22
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Granted: 1964-05-05
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Expires: 1981-06-22
Abstract
No abstract record available.
Inventors
- 👤 Donald A Dymski
- 👤 Joseph M Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:48
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
AN ELECTRONIC STETHOSCOPE SYSTEM RESPONSIVE TO BODY SOUNDS AND ELECTRICAL IMPULSES, COMPRISING A MICROPHONE FOR PICKING UP BODY SOUNDS, SOUND SIGNAL AMPLIFIER MEANS CONNECTED WITH THE MICROPHONE AND DELIVERING ELECTRICAL SIGNALS PROPORTIONAL THERETO, SOUND REPRODUCING MEANS, SIGNAL GATE MEANS COUPLING SAID AMPLIFIER MEANS TO SAID REPRODUCING MEANS, SAID GATE MEANS SELECTIVELY CONTROLLING THE PASSAGE OF SAID SIGNALS THERETHROUGH, ELECTRODE MEANS FOR PICKING UP BODY IMPULSES, IMPULSE AMPLIFIER MEANS COUPLED WITH SAID ELECTRODE MEANS AND DELIVERING AMPLIFIED ELECTRIC IMPULSES PROPORTIONAL TO SAID BODY IMPULSES, AND GATE CONTROL MEANS COUPLED TO SAID GATE MEANS FOR CONTROLLING THE CONDUCTIVITY THEREOF AND COUPLED TO SAID IMPULSE AMPLIFIER MEANS AND ACTUATED BY AMPLIFIED ELECTRIC IMPULSES TO CHANGE THE CONDUCTIVITY OF THE GATE MEANS, SAID GATE CONTROL MEANS COMPRISING A MONOSTABLE DELAY MULTIVIBRATOR COUPLED TO BE TRIGGERED BY SAID IMPULSES AND HAVING A FIRST R-C TIME CONSTANT DETERMINING THE DURATION OF ITS OUTPUT WAVE WHEN TRIGGERED TO ITS QUASI-STABLE STATE, A MONOSTABLE GATE-VOLTAGE MULTIVIBRA-
Claim 2
Dependent Claim
158 words
AN ELECTRONIC STETHOSCOPE SYSTEM RESPONSIVE TO BODY SOUNDS AND ELECTRICAL IMPULSES, COMPRISING A MICROPHONE FOR PICKING UP BODY SOUNDS, SOUND SIGNAL AMPLIFIER MEANS CONNECTED WITH THE MICROPHONE AND DELIVERING ELECTRICAL SIGNALS PROPORTIONAL THERETO, SOUND REPRODUCING MEANS, SIGNAL GATE MEANS COUPLING SAID AMPLIFIER MEANS TO SAID REPRODUCING MEANS, SAID GATE MEANS SELECTIVELY CONTROLLING THE PASSAGE OF SAID SIGNALS THERETHROUGH, ELECTRODE MEANS FOR PICKING UP BODY IMPULSES, IMPULSE AMPLIFIER MEANS COUPLED WITH SAID ELECTRODE MEANS AND DELIVERING AMPLIFIED ELECTRIC IMPULSES PROPORTIONAL TO SAID BODY IMPULSES, AND GATE CONTROL MEANS COUPLED TO SAID GATE MEANS FOR CONTROLLING THE CONDUCTIVITY THEREOF AND COUPLED TO SAID IMPULSE AMPLIFIER MEANS AND ACTUATED BY AMPLIFIED ELECTRIC IMPULSES TO CHANGE THE CONDUCTIVITY OF THE GATE MEANS, SAID GATE CONTROL MEANS COMPRISING A MONOSTABLE DELAY MULTIVIBRATOR COUPLED TO BE TRIGGERED BY SAID IMPULSES AND HAVING A FIRST R-C TIME CONSTANT DETERMINING THE DURATION OF ITS OUTPUT WAVE WHEN TRIGGERED TO ITS QUASI-STABLE STATE, A MONOSTABLE GATE-VOLTAGE MULTIVIBRA-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |