US3199053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered spring reverberation delay line
Assignee: DH Baldwin Co
•
Filing: 1964-09-18
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Granted: 1965-08-03
•
Expires: 1984-09-18
Abstract
No abstract record available.
Inventors
- 👤 David A Bunger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:31
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN AN ELECTROACOUSTIC TRANSMISSION SYSTEM, A MECHANICAL DELAY LINE, ELECTROMECHANICAL TRANSDUCER MEANS RESPONSIVE TO APPLIED ELECTRICAL SIGNALS TO EXCITE VIBRATIONS IN SAID LINE, MECHANICOELECTRICAL TRANSDUCER MEANS REMOTE FROM SAID FIRST-NAMED MEANS AND RESPONSIVE TO SAID VIBRATIONS IN SAID LINE TO PRODUCE ELECTRICAL SIGNALS REPRESENTATIVE THEREOF, SAID DELAY LINE COMPRISING A SINGLE HELICAL SPRING HAVING A CONTINUOUSLY VARIABLE HELIX DIAMETER ALONG AT LEAST A PORTION OF THE PHYSICAL LENGTH THEREOF TO VARY THE EFFECTIVE ACOUSTIC LENGTH OF SAID SPRING AS A FUNCTION OF THE FREQUENCY OF SAID VIBRATIONS, WHEREIN THE HELIX RADIUS ALONG AT LEAST A PORTION OF THE PHYSICAL LENGTH OF SAID SPRING IS TAPERED MONOTONICALLY FROM A FIRST RADIUS TO A SECOND RADIUS, SAID RADIUS HAVING VALVES SUCH THAT VIBRATIONS UNDERGO A CHANGE IN MODE OF PROPAGATION ALONG SAID TAPERED PORTIONS AT A HELIX RADIUS DEFINED BY
Claim 2
Dependent Claim
138 words
IN AN ELECTROACOUSTIC TRANSMISSION SYSTEM, A MECHANICAL DELAY LINE, ELECTROMECHANICAL TRANSDUCER MEANS RESPONSIVE TO APPLIED ELECTRICAL SIGNALS TO EXCITE VIBRATIONS IN SAID LINE, MECHANICOELECTRICAL TRANSDUCER MEANS REMOTE FROM SAID FIRST-NAMED MEANS AND RESPONSIVE TO SAID VIBRATIONS IN SAID LINE TO PRODUCE ELECTRICAL SIGNALS REPRESENTATIVE THEREOF, SAID DELAY LINE COMPRISING A SINGLE HELICAL SPRING HAVING A CONTINUOUSLY VARIABLE HELIX DIAMETER ALONG AT LEAST A PORTION OF THE PHYSICAL LENGTH THEREOF TO VARY THE EFFECTIVE ACOUSTIC LENGTH OF SAID SPRING AS A FUNCTION OF THE FREQUENCY OF SAID VIBRATIONS, WHEREIN THE HELIX RADIUS ALONG AT LEAST A PORTION OF THE PHYSICAL LENGTH OF SAID SPRING IS TAPERED MONOTONICALLY FROM A FIRST RADIUS TO A SECOND RADIUS, SAID RADIUS HAVING VALVES SUCH THAT VIBRATIONS UNDERGO A CHANGE IN MODE OF PROPAGATION ALONG SAID TAPERED PORTIONS AT A HELIX RADIUS DEFINED BY
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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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |