Patent US3838449A successfully refreshed from Google Patents.
US3838449A
Expired / Lapsed
US
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Method and system for digital recording
Assignee: NEW ENGLAND RES ASS Inc
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Filing: 1973-03-13
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Granted: 1974-09-24
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Expires: 1993-03-13
Abstract
Abstract A method and system for digital character-by-character or incremental recording in which the spaces of the data signals are recorded instead of the marks to prevent a velocity modulated signal from being recorded in the interrecord gaps. The signal recorded is a pulse carrier signal which is generated in correspondence with the spaces of the data signal. An environmental water monitoring apparatus for character-bycharacter recording of a digital word indicative of analog measurements taken by a plurality of sensors which are periodically monitored.
Inventors
- 👤 J Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:48
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/20; G11B31/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
118 words
A system for recording information on an incrementally movable magnetic tape on a single channel in response to a data signal comprised of sequentially occurring digital signal groups of mark signals and space signals which groups correspond to characters to be recorded, said signal groups at least some of the time being separated by an interrecord gap time during which a mark signal occurs comprising, recording means responsive to said space signals of said data signal but not to said mark signals for recording a separate signal on said magnetic tape corresponding to each of said space signals of said data signal, means for stopping said magnetic tape during said interrecord gap times when said mark signal occurs.
Claim 2
Independent Claim
118 words
A system for recording information on an incrementally movable magnetic tape on a single channel in response to a data signal comprised of sequentially occurring digital signal groups of mark signals and space signals which groups correspond to characters to be recorded, said signal groups at least some of the time being separated by an interrecord gap time during which a mark signal occurs comprising, recording means responsive to said space signals of said data signal but not to said mark signals for recording a separate signal on said magnetic tape corresponding to each of said space signals of said data signal, means for stopping said magnetic tape during said interrecord gap times when said mark signal occurs.
Claim 3
Dependent Claim
49 words
A system according to claim 1 wherein said information is recorded for subsequent playback through the telephone lines, said recording means comprising means for recording a carrier signal having a frequency within the bandpass of said telephone lines in response to the occurrence of each of said space signals.
Claim 4
Dependent Claim
14 words
The system of claim 2 wherein said data signal is a standard teletype signal.
Claim 5
Dependent Claim
23 words
The system of claim 2 further including means responsive to said data signal for starting said tape before said data signal is recorded.
Claim 6
Dependent Claim
66 words
The system of claim 4 wherein said means for recording said carrier signal includes inverter means for inverting the mark and space signals of said data signal, clock means for generating said carrier signal, and coincidence detector means responsive to said inverted signals and said carrier signal for outputting said carrier signal at times corresponding to the occurrences of said space signals of said data signal.
Claim 7
Dependent Claim
28 words
The system of claim 2 wherein said data signal is derived by passing the parallel output signals of a keyboard means through a parallel to serial converter means.
Claim 8
Dependent Claim
91 words
The system of claim 5 further including serial to parallel converter means, means for inputting said data signal to said serial to parallel converter means, means for starting said tape responsive to the completion of the conversion performed by said serial to parallel converter means, means also responsive to the completion of said conversion for feeding the parallel output signals of said converter means to a parallel to serial converter means, and means for causing said signals to be fed out of said parallel to serial converter means in serial form.
Claim 9
Dependent Claim
41 words
The system of claim 7 wherein said means for starting said tape, said means for feeding the parallel output signals of said converter means, and said means for causing said signals to be fed out all include a monostable multivibrator means.
Claim 10
Dependent Claim
23 words
The system of claim 8 wherein said means for starting said tape and said means for stopping said tape includes a latch means.
Claim 11
Independent Claim
156 words
A system for recording and playing back information in a single channel on an incrementally movable magnetic tape corresponding to a data signal comprised of sequentially occurring digital signal groups of mark signals and space signals which groups correspond to characters to be recorded, said signal groups at least some of the time being separated by an inter-record gap time during which a mark signal occurs comprising, recording means responsive to said space signals of said data signal but not to said mark signals for recording a separate carrier signal having a carrier frequency on said magnetic tape in response to the occurrence of each of said space signals of said data signal, means for stopping said magnetic tape during said inter-record gap times when said mark signal occurs, means for tranducing the recorded information on said tape to an electrical playback signal and means for reconstituting said original data signal from said electrical playback signal.
Claim 12
Independent Claim
156 words
A system for recording and playing back information in a single channel on an incrementally movable magnetic tape corresponding to a data signal comprised of sequentially occurring digital signal groups of mark signals and space signals which groups correspond to characters to be recorded, said signal groups at least some of the time being separated by an inter-record gap time during which a mark signal occurs comprising, recording means responsive to said space signals of said data signal but not to said mark signals for recording a separate carrier signal having a carrier frequency on said magnetic tape in response to the occurrence of each of said space signals of said data signal, means for stopping said magnetic tape during said inter-record gap times when said mark signal occurs, means for tranducing the recorded information on said tape to an electrical playback signal and means for reconstituting said original data signal from said electrical playback signal.
Claim 13
Dependent Claim
31 words
The system of claim 10 wherein said means for reconstituting said original data signal includes means for generating space signals in response to carrier signal portions of said electrical playback signal.
Claim 14
Dependent Claim
31 words
The system of claim 11 wherein said means for generating space signal includes resettable one-shot multivibrator means having a period of a longer duration than the period of said carrier signal.
Claim 15
Dependent Claim
17 words
The system of claim 12 wherein said means for reconstituting further includes clipping and wave shaping means.
Claim 16
Dependent Claim
58 words
The system of claim 2 wherein said data signal is generated by a liquid monitoring apparatus, said apparatus including means for periodically sampling liquid in which a part of said apparatus is immersed, means for generating analog signals representative of the parameters of said liquid sampled, and means for converting said analog signal to said digital data signal.
Claim 17
Dependent Claim
48 words
The system of claim 14 wherein said means for generating analog signals includes a plurality of transducer means responsive to the parameters of said liquid and said means for sampling includes means for periodically connecting the output of each of said transducer means to said means for converting.
Claim 18
Dependent Claim
16 words
The system of claim 15 wherein said means for sampling includes clock means and counter means.
Claim 19
Dependent Claim
26 words
The system of claim 16 wherein said part of said appartus which is immersed in said liquid comprises a sonde to which transducer means are attached.
Claim 20
Dependent Claim
43 words
The system of claim 14 in combination with playback apparatus which comprises means for transducing the information recorded on said tape to an electrical playback signal and means including resettable one-shot multivibrator means for reconstituting said original data signal from said playback signal.
Claim 21
Independent Claim
101 words
A method of recording information on an incrementally movable magnetic tape in a single channel corresponding to a data signal comprised of sequentially occurring digital signal groups of mark signals and space signals which groups correspond to characters to be recorded, said signal groups at least some of the time being separated by an inter-record gap time during which a mark signal occurs, comprising, recording a separate signal on said magnetic tape in response to the occurrence of each of said space signals of said data signal, stopping said magnetic tape during said inter-record gap times when said mark signal occurs.
Claim 22
Independent Claim
101 words
A method of recording information on an incrementally movable magnetic tape in a single channel corresponding to a data signal comprised of sequentially occurring digital signal groups of mark signals and space signals which groups correspond to characters to be recorded, said signal groups at least some of the time being separated by an inter-record gap time during which a mark signal occurs, comprising, recording a separate signal on said magnetic tape in response to the occurrence of each of said space signals of said data signal, stopping said magnetic tape during said inter-record gap times when said mark signal occurs.
Claim 23
Dependent Claim
49 words
The method of claim 19 wherein said information is recorded for subsequent playback through the telephone lines and said step of recording comprises recording a carrier signal having a frequency within the band pass of said telephone lines in response to the occurrence of each of said space signals.
References Cited (Backward Citations)
US3413626A
Cited
US3506814A
Cited
US3474429A
Cited
US3582922A
Cited
US3646534A
Cited
US3685031A
Cited
US3757309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |