Patent US1940356A successfully refreshed from Google Patents.
Patent US3272906A successfully refreshed from Google Patents.
US3272906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio reproduction system
Assignee: Zenith Electronics LLC
•
Filing: 1960-10-25
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Granted: 1966-09-13
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Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Vries Adrian J De
- 👤 George V Morris
- 👤 Erwin M Roschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:09
CPC Classifications
H; H04; H04S; H04S5/00; H04S2400/00; H04S2400/05; H04S5/005; Y; Y10; Y10S; Y10S84/00; Y10S84/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
AN AUDIO REPRODUCTION SYSTEM COMPRISING: A SOURCE OF AUDIO SIGNALS; A PLURALITY OF INDIVIDUAL AUDIO REPRODUCTION DEVICES; MEANS FOR UTILIZING SAID AUDIO SIGNALS TO ENERGIZE SAID REPRODUCTION DEVICES INCLUDING AT LEAST ONE ELECTRIC DISCHARGE DEVICE RESPONSE TO AN APPLIED CONTROL SIGNAL TO CONTROL THE RELATIVE INTENSITY OF SOUND REPRODUCTION BY SAID AUDIO REPRODUCTION DEVICES; MEANS FOR DEVELOPING A FIRST CONTROL SIGNAL HAVING A FREQUENCY IN THE LOW-FREQUENCY PORTION OF THE AUDIO SPECTRUM AND FOR DEVELOPING A SECOND CONTROL SIGNAL ALSO HAVING A FREQUENCY IN THE LOW-FREQUENCY PORTION OF THE AUDIO SPECTRUM BUT HIGHER IN FREQUENCY THAN SAID FIRST CONTROL SIGNAL; AND MEANS FOR APPLYING SAID FIRST CONTROL SIGNAL TO SAID DISCHARGE DEVICE OF SAID UTILIZING MEANS FOR EFFECTING A PREDETERMINED AMPLITUDE VARIATION IN SAID AUDIO SIGNALS AT THE FREQUENCY OF SAID FIRST CONTROL SIGNAL TO VARY THE EFFECTIVE DOMINANT SOURCE OF SOUND REPRODUCED BY SAID AUDIO REPRODUCTION DEVICES AND FOR CONCURRENTLY APPLYING SAID SECOND CONTROL SIGNAL TO SAID UTILIZING MEANS FOR EFFECTING A PREDETERMINED AMPLITUDE VARIATION IN SAID AUDIO SIGNALS AT THE FREQUENCY OF SAID SECOND CONTROL SIGNAL TO PRODUCE A "VIBRATO" OR"CELESTE" SUBJECTIVE LISTENING EFFECT.
Claim 2
Dependent Claim
186 words
AN AUDIO REPRODUCTION SYSTEM COMPRISING: A SOURCE OF AUDIO SIGNALS; A PLURALITY OF INDIVIDUAL AUDIO REPRODUCTION DEVICES; MEANS FOR UTILIZING SAID AUDIO SIGNALS TO ENERGIZE SAID REPRODUCTION DEVICES INCLUDING AT LEAST ONE ELECTRIC DISCHARGE DEVICE RESPONSE TO AN APPLIED CONTROL SIGNAL TO CONTROL THE RELATIVE INTENSITY OF SOUND REPRODUCTION BY SAID AUDIO REPRODUCTION DEVICES; MEANS FOR DEVELOPING A FIRST CONTROL SIGNAL HAVING A FREQUENCY IN THE LOW-FREQUENCY PORTION OF THE AUDIO SPECTRUM AND FOR DEVELOPING A SECOND CONTROL SIGNAL ALSO HAVING A FREQUENCY IN THE LOW-FREQUENCY PORTION OF THE AUDIO SPECTRUM BUT HIGHER IN FREQUENCY THAN SAID FIRST CONTROL SIGNAL; AND MEANS FOR APPLYING SAID FIRST CONTROL SIGNAL TO SAID DISCHARGE DEVICE OF SAID UTILIZING MEANS FOR EFFECTING A PREDETERMINED AMPLITUDE VARIATION IN SAID AUDIO SIGNALS AT THE FREQUENCY OF SAID FIRST CONTROL SIGNAL TO VARY THE EFFECTIVE DOMINANT SOURCE OF SOUND REPRODUCED BY SAID AUDIO REPRODUCTION DEVICES AND FOR CONCURRENTLY APPLYING SAID SECOND CONTROL SIGNAL TO SAID UTILIZING MEANS FOR EFFECTING A PREDETERMINED AMPLITUDE VARIATION IN SAID AUDIO SIGNALS AT THE FREQUENCY OF SAID SECOND CONTROL SIGNAL TO PRODUCE A "VIBRATO" OR"CELESTE" SUBJECTIVE LISTENING EFFECT.
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |