Patent US3420966A successfully refreshed from Google Patents.
US3420966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical tape-slide synchronizing system
Assignee: Individual
•
Filing: 1965-09-13
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Granted: 1969-01-07
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Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 James T Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:05
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN AN AUDIO-VISUAL APPARATUS FOR AUTOMATICALLY CHANGING PICTURES EXHIBITED BY AN INTERMITTENTLY OPERABLE PICTURE PROJECTOR BY MEANS OF CHANGE SIGNALS RECORDED UPON AN AUDIO TAPE, SAID APPARATUS BEING SELECTIVELY OPERABLE FOR APPLYING SAID CHANGE SIGNALS TO SAID AUDIO TAPE, THE COMBINATION OF: (A) ELECTRICAL MEANS TO REPRODUCE ELECTRICAL VARIATIONS CORRESPONDING TO AUDIBLE SOUNDS FROM SAID TAPE, (B) AN AMPLIFER CONNECTED TO SAID ELECTRICAL MEANS, (C) A FILTER CONNECTED TO SAID ELECTRICAL FREQUENCY HIGH IN THE USEFUL RANGE OF SAID AUDIABLE SOUNDS, (D) A MULTIVIBRATOR, (E) FIRST CIRCUIT MEANS, (F) SECOND CIRCUIT MEANS, (G) SWITCHING MEANS TO SELECTIVELY CONNECT SAID MULTIVIBRATOR WITH SAID FIRST CIRCUIT MEANS TO OPERATE DAID MULTIVIBRATOR AS A FREE RUNNING OSCILLATOR AT SAID FREQUENCY HIGH IN THE USEFUL RANGE OF SAID AUDIBLE SOUNDS FOR RECORDING CHANGE SIGNALS UPON SAID TAPE, AND TO SELECTIVELY CONNECT SAID MULTIVIBRATOR WITH SAID SECOND CIRCUIT MEANS TO OPERATE SAID MULTIVIBRATOR AS A MONOSTABLE MULTIVIBRATOR AND TO CONNECT SAID MONOSTABLE MULTIVIBRATOR TO SAID FILTER TO PRODUCE AN ELECTRICAL PULSE FOR AUTOMATICALLY CHANGING ONR OF SAID PICTURES.
Claim 2
Dependent Claim
173 words
IN AN AUDIO-VISUAL APPARATUS FOR AUTOMATICALLY CHANGING PICTURES EXHIBITED BY AN INTERMITTENTLY OPERABLE PICTURE PROJECTOR BY MEANS OF CHANGE SIGNALS RECORDED UPON AN AUDIO TAPE, SAID APPARATUS BEING SELECTIVELY OPERABLE FOR APPLYING SAID CHANGE SIGNALS TO SAID AUDIO TAPE, THE COMBINATION OF: (A) ELECTRICAL MEANS TO REPRODUCE ELECTRICAL VARIATIONS CORRESPONDING TO AUDIBLE SOUNDS FROM SAID TAPE, (B) AN AMPLIFER CONNECTED TO SAID ELECTRICAL MEANS, (C) A FILTER CONNECTED TO SAID ELECTRICAL FREQUENCY HIGH IN THE USEFUL RANGE OF SAID AUDIABLE SOUNDS, (D) A MULTIVIBRATOR, (E) FIRST CIRCUIT MEANS, (F) SECOND CIRCUIT MEANS, (G) SWITCHING MEANS TO SELECTIVELY CONNECT SAID MULTIVIBRATOR WITH SAID FIRST CIRCUIT MEANS TO OPERATE DAID MULTIVIBRATOR AS A FREE RUNNING OSCILLATOR AT SAID FREQUENCY HIGH IN THE USEFUL RANGE OF SAID AUDIBLE SOUNDS FOR RECORDING CHANGE SIGNALS UPON SAID TAPE, AND TO SELECTIVELY CONNECT SAID MULTIVIBRATOR WITH SAID SECOND CIRCUIT MEANS TO OPERATE SAID MULTIVIBRATOR AS A MONOSTABLE MULTIVIBRATOR AND TO CONNECT SAID MONOSTABLE MULTIVIBRATOR TO SAID FILTER TO PRODUCE AN ELECTRICAL PULSE FOR AUTOMATICALLY CHANGING ONR OF SAID PICTURES.
References Cited (Backward Citations)
US3227814A
Cited
US3200206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |