US3200899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic dynamic sound level indicator
Assignee: Mardan Corp
•
Filing: 1959-10-05
•
Granted: 1965-08-17
•
Expires: 1979-10-05
Abstract
No abstract record available.
Inventors
- 👤 Serge L Krauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:15
CPC Classifications
G; G01; G01H; G01H3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN INDICATOR FOR VISUALLY SHOWING THE DYNAMIC LEVEL OF SOUND INCLUDING IN COMBINATION, TRANSLATING MEANS FOR CONVERTING SOUND WAVES TO ELECTRICAL WAVES, MEANS FOR AMPLIFYING THE ELECTRICAL WAVES, SAID AMPLIFYING MEANS INCLUDING FIRST AND SECOND STAGES EACH HAVING INPUT AND OUTPUT CIRCUITS, WITH SAID OUTPUT CIRCUIT OF SAID FIRST STAGE COUPLED TO SAID INPUT CIRCUIT OF SAID SECOND STAGE, AND FEEDBACK MEAN COUPLING SAID OUTPUT CIRCUIT OF SAID SECOND STAGE TO SAID INPUT CIRCUIT OF SAID FIRST STAGE INCLUDING A PARALLEL TO FEEDBACK CIRCUIT FOR ACCENTUATING THE RESPONSE AT FREQUENCIES OF THE ORDER OF 4,000 CYCLES PER SECOND TO PROIDE A RESPONSE SUBSTANTIALLY THE SAME AS THAT OF THE HUMAN EAR, FULL WAVE RECTIFIER MEANS FOR RECTIFYING THE AMPLIFIEDC WAVES TO PRODUCE A DIRECT CURRENT CONTROL VOLTAGE, A PLURALITY OF STRIPS OF DIFFERENT COLORS POSITIONED ADJACENT EACH OTHER, A PLURALITY OF LAMP MEANS FOR INDIVIDUALLY ILLUMINATING SAID STRIPS, A PLURALITY OF CONTROL MEANS
Claim 2
Dependent Claim
153 words
AN INDICATOR FOR VISUALLY SHOWING THE DYNAMIC LEVEL OF SOUND INCLUDING IN COMBINATION, TRANSLATING MEANS FOR CONVERTING SOUND WAVES TO ELECTRICAL WAVES, MEANS FOR AMPLIFYING THE ELECTRICAL WAVES, SAID AMPLIFYING MEANS INCLUDING FIRST AND SECOND STAGES EACH HAVING INPUT AND OUTPUT CIRCUITS, WITH SAID OUTPUT CIRCUIT OF SAID FIRST STAGE COUPLED TO SAID INPUT CIRCUIT OF SAID SECOND STAGE, AND FEEDBACK MEAN COUPLING SAID OUTPUT CIRCUIT OF SAID SECOND STAGE TO SAID INPUT CIRCUIT OF SAID FIRST STAGE INCLUDING A PARALLEL TO FEEDBACK CIRCUIT FOR ACCENTUATING THE RESPONSE AT FREQUENCIES OF THE ORDER OF 4,000 CYCLES PER SECOND TO PROIDE A RESPONSE SUBSTANTIALLY THE SAME AS THAT OF THE HUMAN EAR, FULL WAVE RECTIFIER MEANS FOR RECTIFYING THE AMPLIFIEDC WAVES TO PRODUCE A DIRECT CURRENT CONTROL VOLTAGE, A PLURALITY OF STRIPS OF DIFFERENT COLORS POSITIONED ADJACENT EACH OTHER, A PLURALITY OF LAMP MEANS FOR INDIVIDUALLY ILLUMINATING SAID STRIPS, A PLURALITY OF CONTROL MEANS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |