Patent US3197575A successfully refreshed from Google Patents.
US3197575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density recorder utilizing low tape speed
Assignee: Individual
•
Filing: 1960-08-10
•
Granted: 1965-07-27
•
Expires: 1980-08-10
Abstract
No abstract record available.
Inventors
- 👤 Emil L Eckstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:49
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/02; G11B15/05; G11B15/06; G11B5/00; G11B5/48; G11B5/52; G11B5/53; G11B5/531; G11B5/535
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
AN IMPROVED TAPE RECORDER COMPRISING A ROTATABLE DRUM, A PLURALITY OF N NUMBER OF RECORDING HEADS SPACED EQUALLY ABOUT THE CIRCUMFERENCE OF SAID DRUM AND SPACED LONGITUDINALLY THEREON OVER A DISTANCE LESS THAN THE WIDTH OF TAPE TO BE RECORDED UPON, DRIVE MEANS TRANSPORTING TAPE ACROSS SAID DRUM OVER A LIMITED CIRCUMFERENTIAL EXTENT THEREOF, MEANS ROTATING SAID DRUM IN A DIRECTION OPPOSITE TO THE DIRECTION OF TAPE MOTION THEREOVER WHEREBY THE RECORDING SPEED IS IN THE SUM OF TAPE VELOCITY AND PERIPHERAL DRUM VELOCITY, AND MEANS SYNCHRONIZING THE TAPE DRIVE MEANS AND DRUM ROTATING MEANS TO ESTABLISH A RATIO OF TAPE VELOCITY TO PERIPHERAL HEAD VELOCITY EQUAL TO THE QUANTITY
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |