US3158683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite signal-producing apparatus with means for producing sync pulses by offsetting black level
Assignee: Lanteris Space LLC
•
Filing: 1961-11-21
•
Granted: 1964-11-24
•
Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Richard E Waggener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:25
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/14; H04N7/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A COMPOSITE SIGNAL-PRODUCING APPARATUS WHEREIN AN IMAGE IS SCANNED IN SUCCESSIVE LINES BY A MOVING SCANNING MEMBER WHICH PERMITS PASSAGE OF LIGHT FROM THE IMAGE TO LIGHT-RESPONSIVE SIGNAL-PRODUCING MEANS, THE IMPROVEMENT WHICH COMPRISES MEANS FOR PROVIDING OVER THE IMAGE AREA A CONSTANT LOW LEVEL OF ILLUMINATION, THEREBY TO ESTABLISH A "BLACK" LEVEL IN THE PRODUCED SIGNAL, AND MEANS FOR INTERRUPTING THE LIGHT PASSAGE TO SAID SIGNAL-PRODUCING MEANS BETWEEN SUCCESISVE LINE SCANS OF THE IMAGE, THEREBY TO PROVIDE IN SAID SIGNAL SYNCHRONIZING PULSES ON THE "BLACKER-THAN-BLACK" SIDE OF SAID LEVEL.
Claim 2
Dependent Claim
90 words
IN A COMPOSITE SIGNAL-PRODUCING APPARATUS WHEREIN AN IMAGE IS SCANNED IN SUCCESSIVE LINES BY A MOVING SCANNING MEMBER WHICH PERMITS PASSAGE OF LIGHT FROM THE IMAGE TO LIGHT-RESPONSIVE SIGNAL-PRODUCING MEANS, THE IMPROVEMENT WHICH COMPRISES MEANS FOR PROVIDING OVER THE IMAGE AREA A CONSTANT LOW LEVEL OF ILLUMINATION, THEREBY TO ESTABLISH A "BLACK" LEVEL IN THE PRODUCED SIGNAL, AND MEANS FOR INTERRUPTING THE LIGHT PASSAGE TO SAID SIGNAL-PRODUCING MEANS BETWEEN SUCCESISVE LINE SCANS OF THE IMAGE, THEREBY TO PROVIDE IN SAID SIGNAL SYNCHRONIZING PULSES ON THE "BLACKER-THAN-BLACK" SIDE OF SAID LEVEL.
References Cited (Backward Citations)
US2169654A
Cited
US2151942A
Cited
US2368884A
Cited
US2543066A
Cited
US2954427A
Cited
US2957941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |