US3573393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape handling control element and system for reversal of tape movement during low sound levels
Assignee: American Videonetics Corp
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Filing: 1967-06-26
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Granted: 1971-04-06
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Expires: 1987-06-26
Abstract
Abstract A control system for handling elongated pliable recording tape where the tape carries an antiphase control signal which preconditions the playback apparatus whereby reversal of the tape will occur in response to a subsequent predetermined drop in signal level of the reproduced program being played back.
Inventors
- 👤 James W F Blackie
- 👤 Gregory J Maleski
- 👤 Chester W Newell
- 👤 Charles A Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B15/18; G11B15/44; G11B15/444; G11B27/00; G11B27/10; G11B27/19; G11B27/22; G11B27/28; G11B27/30; G11B27/3018
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
255 words
In a tape transport of a type including motive means for feeding a pliable length of recorded tape in opposite directions between supply and takeup rolls thereof, the tape having thereon a first channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movement of the tape in a first direction and a second channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movement of the tape in a second direction opposite to said first direction, said first channel also including a prerecorded control signal at a discrete location in the travel of said tape, first means serving to monitor the recorded manifestations of program information signals along said first channel on said tape, second means operatively coupled to the last named means and serving to sense the prerecorded control signal at the discrete location in the travel of said tape and to provide a first command signal, third means conditioned by said first command signal to thereafter sense the signal level of said program information signals and provide a second command signal upon detecting reduction in said signal level to a predetermined level during continuation of the sensing of said information signals, and means operatively coupled to receive each of said command signals and operatively responsive to conjoint receipt thereof to operate the motive means to reverse the direction of movement of tape and to condition the monitoring means to cooperate with and monitor said second channel when said tape moves in the reverse direction.
Claim 2
Dependent Claim
255 words
In a tape transport of a type including motive means for feeding a pliable length of recorded tape in opposite directions between supply and takeup rolls thereof, the tape having thereon a first channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movement of the tape in a first direction and a second channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movement of the tape in a second direction opposite to said first direction, said first channel also including a prerecorded control signal at a discrete location in the travel of said tape, first means serving to monitor the recorded manifestations of program information signals along said first channel on said tape, second means operatively coupled to the last named means and serving to sense the prerecorded control signal at the discrete location in the travel of said tape and to provide a first command signal, third means conditioned by said first command signal to thereafter sense the signal level of said program information signals and provide a second command signal upon detecting reduction in said signal level to a predetermined level during continuation of the sensing of said information signals, and means operatively coupled to receive each of said command signals and operatively responsive to conjoint receipt thereof to operate the motive means to reverse the direction of movement of tape and to condition the monitoring means to cooperate with and monitor said second channel when said tape moves in the reverse direction.
Claim 3
Dependent Claim
84 words
Tape transport apparatus according to claim 1 wherein said third means serves normally to sense a further reduced predetermined signal level, said third means being operably responsive to said second means to be conditioned to sense the first named of said signal levels in response to sensing of said recorded control signal by said second means, and means serving to condition said motive means to change the movement of the tape responsive to sensing said further reduced predetermined signal level for a predetermined duration.
Claim 4
Dependent Claim
86 words
Tape transport apparatus according to claim 1 wherein each said channel is comprised of two recorded tracks extending along the tape and adapted to feed a pair of speakers, and said control signal comprises a first portion recorded at a substantially predetermined frequency in one track of the channel and a second portion recorded in another track of the channel at substantially the same frequency but 180 electrical degrees out of phase with said first portion, said second means sensing said first and second portions conjointly.
Claim 5
Dependent Claim
235 words
In a tape transport of a type including motive means for feeding a pliable length of recorded tape in opposite directions between supply and takeup rolls thereof, the tape having thereon a first channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movement of the tape in a first direction and a second channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movemeNt of the tape in a second direction opposite to said first direction, said first channel also including a prerecorded control signal at a discrete location in the travel of said tape, first means serving to monitor the recorded manifestations of program information signals and the recorded control signals in said first channel on said tape, second means operatively coupled to the last named means and serving to provide a first command signal in response to said control signal, third means coupled to said first and second means for producing a second command signal when said information signal falls to a predetermined level after said first command signal is produced, and means operatively coupled to receive each of said command signals and operatively responsive to conjoint receipt thereof to operate the motive means to reverse the direction of movement of tape and to condition the monitoring means to cooperate with and monitor said second channel when said tape moves in the reverse direction.
Claim 6
Dependent Claim
235 words
In a tape transport of a type including motive means for feeding a pliable length of recorded tape in opposite directions between supply and takeup rolls thereof, the tape having thereon a first channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movement of the tape in a first direction and a second channel of prerecorded manifestations of reproducible program information signals adapted to be transduced under movemeNt of the tape in a second direction opposite to said first direction, said first channel also including a prerecorded control signal at a discrete location in the travel of said tape, first means serving to monitor the recorded manifestations of program information signals and the recorded control signals in said first channel on said tape, second means operatively coupled to the last named means and serving to provide a first command signal in response to said control signal, third means coupled to said first and second means for producing a second command signal when said information signal falls to a predetermined level after said first command signal is produced, and means operatively coupled to receive each of said command signals and operatively responsive to conjoint receipt thereof to operate the motive means to reverse the direction of movement of tape and to condition the monitoring means to cooperate with and monitor said second channel when said tape moves in the reverse direction.
References Cited (Backward Citations)
US3124662A
Cited
US3171902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |