US3223789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control of groove spacing in phonograph records
Assignee: US Philips Corp
•
Filing: 1962-05-10
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Granted: 1965-12-14
•
Expires: 1982-05-10
Abstract
No abstract record available.
Inventors
- 👤 Ooms Johan Lodewijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/10; G11B3/34; G11B3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS FOR THE AUTOMATIC CONTROL OF THE GROOVE SPACING IN PHONOGRAPH RECORDS COMPRISING: A MOVING CARRIER IN WHICH THE SIGNAL TO BE CUT INTO A PHONOGRAPH RECORD IS RECORDED, A PICK-UP HEAD FOR READING SAID SIGNAL FROM SAID CARRIER, A PRELIMINARY PICK-UP HEAD FOR READING SAID SIGNAL PRIOR IN TIME TO SAID SCANNING HEAD, MEANS FOR OBTAINING THE INSTANTANEOUS RATIO BETWEEN THE OUTPUT SIGNALS OF SAID TWO PICK-UP HEADS, MEANS FOR APPLYING SAID RATIO AND THE OUTPUT SIGNAL OF THE PRELIMINARY PICK-UP HED TO DERIVING MEANS FOR DERIVING A CONTROL VOLTAGE HAVING A VALVE DEPENDENT ON SAID RATIO AND THE OUTPUT SIGNAL OF THE PRELIMINARY PICK-UP HEAD, A CUTTING HEAD FOR SAID RECORD, A DRIVING MEMBER FOR SAID CUTTING HEAD, AND MEANS FOR APPLYING SAID CONTROL VOLTAGE TO SAID DRIVING MEMBER.
Claim 2
Dependent Claim
131 words
APPARATUS FOR THE AUTOMATIC CONTROL OF THE GROOVE SPACING IN PHONOGRAPH RECORDS COMPRISING: A MOVING CARRIER IN WHICH THE SIGNAL TO BE CUT INTO A PHONOGRAPH RECORD IS RECORDED, A PICK-UP HEAD FOR READING SAID SIGNAL FROM SAID CARRIER, A PRELIMINARY PICK-UP HEAD FOR READING SAID SIGNAL PRIOR IN TIME TO SAID SCANNING HEAD, MEANS FOR OBTAINING THE INSTANTANEOUS RATIO BETWEEN THE OUTPUT SIGNALS OF SAID TWO PICK-UP HEADS, MEANS FOR APPLYING SAID RATIO AND THE OUTPUT SIGNAL OF THE PRELIMINARY PICK-UP HED TO DERIVING MEANS FOR DERIVING A CONTROL VOLTAGE HAVING A VALVE DEPENDENT ON SAID RATIO AND THE OUTPUT SIGNAL OF THE PRELIMINARY PICK-UP HEAD, A CUTTING HEAD FOR SAID RECORD, A DRIVING MEMBER FOR SAID CUTTING HEAD, AND MEANS FOR APPLYING SAID CONTROL VOLTAGE TO SAID DRIVING MEMBER.
References Cited (Backward Citations)
US3075052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |