US3896489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic tape editing equipment
Assignee: Robert Bosch GmbH
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Filing: 1973-12-19
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Granted: 1975-07-22
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Expires: 1993-12-19
Abstract
Abstract A video tape recorder has an erase head positioned at a predetermined distance ahead of the record/playback head along the transport path of the tape. A first additional head is energized simultaneously with the erase head to leave a mark on an auxiliary track. The mark is sensed by a second additional head spaced from the first additional head by a distance equal to the distance between the erase and record/playback heads. The sensed mark causes the record/playback head to be switched to the recording circuit thereby causing the recording to begin at the start of the taped portion erased by the erase head.
Inventors
- 👤 Frithjof Rudert
- 👤 Rolf Muller
- 👤 Dietmar Gornott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:39
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/022; G11B27/029
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
253 words
In tape recorder equipment having tape, means for transporting said tape along a predetermined path, recording circuits, playback circuits, an erase head mounted in operative proximity to said tape, and at least one record/playback head mounted at a predetermined distance along said predetermined path from said erase head, an electronic editing arrangement for switching said record/playback head from said playback circuits to said recording circuits without creating a gap in the recording on said tape in response to an externally applied record signal, comprising, in combination, additional recording means mounted in operative proximity to said tape for recording a marker signal onto said tape when energized; additional playback means mounted in operative proximity to said tape at a distance from said additional recording means corresponding to said predetermined distance, for sensing said marker signal and furnishing a timing signal in response thereto; means connected to said erase head and said additional recording means for energizing said erase head and said additional recording means substantially simultaneously in response to said externally applied record signal, thereby creating said marker signal and erasing a portion of the recording on said tape; and switch means connected to said additional playback means, said record/playback head and said recording circuits, for connecting said record/playback head to said recording circuits in response to said timing signal and under control of said externally applied record signal, whereby said record/playback head is connected to said record circuitry when the beginning of said erased portion is in operative proximity to said record/playback head.
Claim 2
Dependent Claim
253 words
In tape recorder equipment having tape, means for transporting said tape along a predetermined path, recording circuits, playback circuits, an erase head mounted in operative proximity to said tape, and at least one record/playback head mounted at a predetermined distance along said predetermined path from said erase head, an electronic editing arrangement for switching said record/playback head from said playback circuits to said recording circuits without creating a gap in the recording on said tape in response to an externally applied record signal, comprising, in combination, additional recording means mounted in operative proximity to said tape for recording a marker signal onto said tape when energized; additional playback means mounted in operative proximity to said tape at a distance from said additional recording means corresponding to said predetermined distance, for sensing said marker signal and furnishing a timing signal in response thereto; means connected to said erase head and said additional recording means for energizing said erase head and said additional recording means substantially simultaneously in response to said externally applied record signal, thereby creating said marker signal and erasing a portion of the recording on said tape; and switch means connected to said additional playback means, said record/playback head and said recording circuits, for connecting said record/playback head to said recording circuits in response to said timing signal and under control of said externally applied record signal, whereby said record/playback head is connected to said record circuitry when the beginning of said erased portion is in operative proximity to said record/playback head.
Claim 3
Dependent Claim
53 words
Equipment as set forth in claim 1, wherein said tape recorder equipment records video signals on said tape on tracks transverse to said predetermined path; and wherein said additional recording means comprise means for recording said marker signal on a track extending along said predetermined path in the region of said transverse tracks.
Claim 4
Dependent Claim
47 words
Equipment as set forth in claim 1, wherein said tape has a main track for recording video signals within a predetermined amplitude and frequency range, and at least one auxiliary track; and wherein said marker signal is recorded on said auxiliary track by said additional recording means.
Claim 5
Dependent Claim
38 words
Equipment as set forth in claim 3, wherein signals normally recorded on said auxiliary track have a predetermined auxiliary amplitude and frequency range; and wherein said marker signal has a frequency outside of said predetermined auxiliary frequency range.
Claim 6
Dependent Claim
36 words
Equipment as set forth in claim 3, wherein signals normally recorded on said auxiliary track have a predetermined auxiliary amplitude range; and wherein said marker signal has an amplitude outside of said predetermined auxiliary amplitude range.
Claim 7
Dependent Claim
237 words
In tape recorder equipment having tape, means for transporting said tape along a predetermined path, recording circuits, playback circuits, an erase head mounted in operative proximity to said tape, and at least one record/playback head mounted at a predetermined distance along said predetermined path from said erase head, an electronic editing arrangement for connecting said record/playback head to said recording circuits or to said playback circuits in response to an externally applied record or playback signal respectively, comprising, in combination, additional recording means mounted in operative proximity to said tape for recording a marker signal on said tape when energized; additional playback means mounted in operative proximity to said tape at a distance from said additional recording means corresponding to said predetermined distance, for sensing said marker signal and furnishing a timing signal in response thereto; means connected to said erase head for energizing said erase head in response to said externally applied record signal; means connected to said additional recording means for receiving said externally applied record and playback signals and energizing said additional recording means in response thereto; and switch means connected to said record/playback head, for connecting said record/playback head to said recording circuits in response to said timing signal and under control of said externally applied record signal, and for connecting said record/playback head to said playback circuits in response to said externally applied playback signal and under control of said timing signal.
Claim 8
Dependent Claim
237 words
In tape recorder equipment having tape, means for transporting said tape along a predetermined path, recording circuits, playback circuits, an erase head mounted in operative proximity to said tape, and at least one record/playback head mounted at a predetermined distance along said predetermined path from said erase head, an electronic editing arrangement for connecting said record/playback head to said recording circuits or to said playback circuits in response to an externally applied record or playback signal respectively, comprising, in combination, additional recording means mounted in operative proximity to said tape for recording a marker signal on said tape when energized; additional playback means mounted in operative proximity to said tape at a distance from said additional recording means corresponding to said predetermined distance, for sensing said marker signal and furnishing a timing signal in response thereto; means connected to said erase head for energizing said erase head in response to said externally applied record signal; means connected to said additional recording means for receiving said externally applied record and playback signals and energizing said additional recording means in response thereto; and switch means connected to said record/playback head, for connecting said record/playback head to said recording circuits in response to said timing signal and under control of said externally applied record signal, and for connecting said record/playback head to said playback circuits in response to said externally applied playback signal and under control of said timing signal.
Claim 9
Dependent Claim
71 words
Equipment as set forth in claim 6, wherein said means connected to said erase head comprise a bistable circuit means for furnishing a first signal at a first output in response to said externally applied record signal and for furnishing a second signal at a second output in response to said externally applied playback signal, and means for connecting said erase head to said first output of said bistable circuit means.
Claim 10
Dependent Claim
68 words
Equipment as set forth in claim 7, wherein said means connected to said additional recording means comprise pulse former means for furnishing at least one standard pulse having a determined pulse width and amplitude in response to said externally applied record and playback signals, and modulator means interconnected between said pulse forming means and said recording means for energizing said recording means in response to said standard pulse.
Claim 11
Dependent Claim
41 words
Equipment as set forth in claim 8, wherein said additional playback means comprise a playback head for sensing said marker signals, and demodulator means connected to said playback head for furnishing said timing signal in response to the so-sensed marker signal.
Claim 12
Dependent Claim
166 words
Equipment as set forth in claim 9, wherein said switch means comprise a first AND-gate having a first input connected to the output of said demodulator means, a second input connected to said first output of said bistale circuit means and a first AND-gate output; a second AND-gate having a first input connected to the output of said demodulator means, a second input connected to said second output of said bistable circuit means and a second AND-gate output; storage means having a first input connected to said first AND-gate output, a second input connected to said second AND-gate output, and a storage output for furnishing a coNtrol signal in response to a signal at said first AND-gate output and for extinguishing said control signal in response to a signal at said second AND-gate output; and a switching circuit for connecting said record/playback head to said recording circuitry in the presence of said control signal and to said playback circuits in the absence of said control signal.
Claim 13
Dependent Claim
143 words
Equipment as set forth in claim 9, wherein said pulse former means comprise a first pulse former for furnishing a first standard pulse in response to said externally applied record signal at a first pulse former output, and a second pulse former for furnishing a second standard pulse at a second pulse former output in response to said externally applied playback signal; wherein said modulator means have a first input connected to said first pulse former output, a second input connected to said second pulse former output, and a modulator output connected to said magnetic recording means for energizing said recording means to produce a first marker signal in response to a signal at said first pulse former output and second marker signal having a characteristic differing from said first marker signal in response to a signal at said second pulse former output.
Claim 14
Dependent Claim
145 words
Equipment as set forth in claim 11, wherein said demodulator means sense said first and second marker signals and furnish an output at a first demodulator output in response to said first marker signal and at a second demodulator output in response to said second marker signal; and wherein said switch means comprise storage means having a first input connected to said first demodulator output, a second input connected to said second demodulator output and a storage output for furnishing a control signal in response to a signal at said first storage input and for suppressing said control signal in response to a signal at said second storage input, and a switching circuit for connecting said record/playback head to said recording circuit in response to said control signal and for connecting said record/playback head to said playback circuit in the absence of said control signal.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |