Patent US3144580A successfully refreshed from Google Patents.
US3144580A
Expired / Lapsed
US
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Vertical deflection system
Assignee: Thomas International Corp
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Filing: 1960-03-21
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Granted: 1964-08-11
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Jack E Bridges
- 👤 Wiencek Abigniew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:47
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/69; H03K4/693
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A PUSH-PULL, CLASS B SWEEP AMPLIFIER CIRCUIT FOR A TELEVISION RECEIVER, ADAPTED TO RECEIVE A SIGNAL INCLUDING A BLANKING PULSE FOR THE SWEEP RETRACE PERIOD: A SOURCE OF DRIVING POTENTIAL, THE DRIVING POTENTIAL HAVING A GENERALLY SAWTOOTH WAVE FORM INCLUDING A SWEEP PORTION AND A RETRACE PORTION; A PAIR OF TRANSISTORS HAVING CONTROL ELEMENTS CONNECTED WITH SAID SOURCE AND DRIVEN ALTERNATIVELY THEREBY DURING SAID SWEEP PORTION OF SAID SAWTOOTH WAVE, THE DRIVING POTENTIAL RENDERING ONE OF SAID TRANSISTORS CONDUCTIVE DURING RETRACE, SAID TRANSISTORS HAVING OUTPUT ELEMENTS; A DEFLECTION COIL CONNECTED WITH THE OUTPUT ELEMENTS OF SAID TRANSISTORS; A DIODE CONNECTED WITH THE OUTPUT ELEMENT OF SAID ONE TRANSISTOR AND PREVENTING CONDUCTION DURING AT LEAST A PORTION OF THE RETRACE; AND A CAPACITOR CONNECTED WITH SAID DEFLECTION COIL AND FORMING A TUNED CIRCUIT THEREWITH A FREQUENCY HAVING A HALF PERIOD NO GREATER THAN THE PERIOD OF THE BLANKING PULSE OF THE RECEIVED SIGNAL, SAID FREQUENCY BEING LESS THAN
Claim 2
Dependent Claim
158 words
IN A PUSH-PULL, CLASS B SWEEP AMPLIFIER CIRCUIT FOR A TELEVISION RECEIVER, ADAPTED TO RECEIVE A SIGNAL INCLUDING A BLANKING PULSE FOR THE SWEEP RETRACE PERIOD: A SOURCE OF DRIVING POTENTIAL, THE DRIVING POTENTIAL HAVING A GENERALLY SAWTOOTH WAVE FORM INCLUDING A SWEEP PORTION AND A RETRACE PORTION; A PAIR OF TRANSISTORS HAVING CONTROL ELEMENTS CONNECTED WITH SAID SOURCE AND DRIVEN ALTERNATIVELY THEREBY DURING SAID SWEEP PORTION OF SAID SAWTOOTH WAVE, THE DRIVING POTENTIAL RENDERING ONE OF SAID TRANSISTORS CONDUCTIVE DURING RETRACE, SAID TRANSISTORS HAVING OUTPUT ELEMENTS; A DEFLECTION COIL CONNECTED WITH THE OUTPUT ELEMENTS OF SAID TRANSISTORS; A DIODE CONNECTED WITH THE OUTPUT ELEMENT OF SAID ONE TRANSISTOR AND PREVENTING CONDUCTION DURING AT LEAST A PORTION OF THE RETRACE; AND A CAPACITOR CONNECTED WITH SAID DEFLECTION COIL AND FORMING A TUNED CIRCUIT THEREWITH A FREQUENCY HAVING A HALF PERIOD NO GREATER THAN THE PERIOD OF THE BLANKING PULSE OF THE RECEIVED SIGNAL, SAID FREQUENCY BEING LESS THAN
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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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |