US3869715A
Expired / Lapsed
US
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Digital storage having a plurality of information sequences in a single track
Assignee: Individual
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Filing: 1973-10-18
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Granted: 1975-03-04
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Expires: 1993-10-18
Abstract
Abstract First and second information sequence are stored character interlaced and bit serially on one track of a magnetic tape, each character of each sequence occupying a determined length of tape. A second track on the tape has markings extending the length of each character of the first information sequence. A read head senses the markings and furnishes a square wave signal having positive portions indicating characters of the first sequence and negative portions indicating characters of the second sequence. A single read-write head senses the information on the first track and a control circuit has a first and second AND-gate for, respectively, transmitting signals from the read-write head to an output terminal in response to a first externally applied selection signal in the presence of the positive half of the square wave and in response to a second externally applied selection signal in the presence of the negative portions of the square wave.
Inventors
- 👤 Klaus Schlickeiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:22
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G06; G06K; G06K13/00; G06K13/18; G06K7/00; G06K7/01; G06K7/016; G06K7/0163; G11B15/00; G11B15/18; G11B15/20; G11B15/46; G11B15/52; G11B27/00; G11B27/10; G11B27/19; G11B27/24; G11B27/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
289 words
In a digital storage arrangement having elongated signal carrier means having a first and second track and having a first and second information sequence, each of said information sequences having a plurality of characters, each of said characters having a plurality of bits, stored on said first track bit serially and in character-interlaced form, and wherein each of said characters occupies a determined character length along said first track, said elongated signal carrier means further having a second track having a plurality of markings for indicating the beginning and end of each of said characters of said first information sequence, a read-out system for selectively reading out said first or said second information sequence, comprising, in combination, read-out means positioned in operative proximity of said first track for sensing said recorded first and second information sequences and furnishing corresponding information signals; externally operable selection means for furnishing a first selection signal indicating desired read-out of said first information sequence or a second selection signal indicating desired read-out of said second information sequence; sensing means positioned in operative proximity to said second track for sensing said markings on said second track and furnishing first marking signals, each present throughout the read-out of a character of said first information sequence, in response thereto; and control circuit means having a first input connected to said read-out means, a second input connected to said sensing means, a control input connected to said selection means, and a data transmission output, for transmitting signals from said read-out means to said data transmission terminal only in the simultaneous presence of said first marking signals and said first selection signal or in the absence of said first marking signal and the presence of said second selection signal.
Claim 2
Dependent Claim
289 words
In a digital storage arrangement having elongated signal carrier means having a first and second track and having a first and second information sequence, each of said information sequences having a plurality of characters, each of said characters having a plurality of bits, stored on said first track bit serially and in character-interlaced form, and wherein each of said characters occupies a determined character length along said first track, said elongated signal carrier means further having a second track having a plurality of markings for indicating the beginning and end of each of said characters of said first information sequence, a read-out system for selectively reading out said first or said second information sequence, comprising, in combination, read-out means positioned in operative proximity of said first track for sensing said recorded first and second information sequences and furnishing corresponding information signals; externally operable selection means for furnishing a first selection signal indicating desired read-out of said first information sequence or a second selection signal indicating desired read-out of said second information sequence; sensing means positioned in operative proximity to said second track for sensing said markings on said second track and furnishing first marking signals, each present throughout the read-out of a character of said first information sequence, in response thereto; and control circuit means having a first input connected to said read-out means, a second input connected to said sensing means, a control input connected to said selection means, and a data transmission output, for transmitting signals from said read-out means to said data transmission terminal only in the simultaneous presence of said first marking signals and said first selection signal or in the absence of said first marking signal and the presence of said second selection signal.
Claim 3
Dependent Claim
58 words
An arrangement as set forth in claim 1, wherein each of said markings extend a distance along said second track substantially equal to said determined character length, the position of each of said markings along said second track corresponding to the position of a coresponding one of said characters of said first information sequence along said first track.
Claim 4
Dependent Claim
25 words
An arrangement as set forth in claim 2, wherein the distance between sequential ones of said markings is substantially equal to said determined character length.
Claim 5
Dependent Claim
88 words
An arrangement as set forth in claim 3, wherein said signal carrier means is a magnetic tape; wherein said read-out means comprise a first read head for reading information from said magnetic tape and first pulse shaper means connected to said first read head for furnishing said information signals; wherein said sensing means comprise a second read head and second pulse shaper means connected to said second read head for furnishing a substantially square wave signal, alternate halfwaves of said square wave signal constituting said first marking signal.
Claim 6
Dependent Claim
52 words
An arrangement as set forth in claim 4, wherein the positive portions of said square wave constitute said first marking signals and wherein said negative portions of said halfwave constitute second marking signals, each of said second marking signals being indicative of the presence of a character in said second information sequence.
Claim 7
Dependent Claim
135 words
An arrangement as set forth in claim 1, wherein said control cirCuit means comprise a first and second control input for receiving, respectively, said first and second selection signals, logic circuit means connected to said first and second control input and said sensing means for furnishing a data selector signal upon simultaneous presence of said first selection signal and said first marking signal or said second selection signal in the absence of said first marking signal, and a first AND-gate having an output connected to said data transmission terminal, a first input connected to said read-out means and a second input connected to the output of said logic circuit means, for transmitting data to said data transmission terminal in the simultaneous presence of said data selector signal and a signal sensed by said read-out means.
Claim 8
Dependent Claim
98 words
An arrangement as set forth in claim 6, wherein said logic circuit means comprise a second AND-gate having a first input connected to said second control input, a second input connected to said sensing means and a second AND-gate output, a third AND-gate having a first input connected to said first control input, a second input connected to said sensing means and a third AND-gate output, and an OR-gate having a first and second input respectively connected to said second and third AND-gate outputs and having an OR-gate output connected to said second input of said first AND-gate.
Claim 9
Dependent Claim
94 words
An arrangement as set forth in claim 1, wherein said read-out means comprise read/record means; further comprising means for furnishing an information sequence to be recorded in said first track; and wherein said means for furnishing said information sequence is connected to said first input of said control circuit means and said read/record means is connected to said data transmission terminal, whereby said information sequence to be recorded is recorded on said first track to constitute said first or second information sequence in dependence, respectively, on receipt of said first or second selection 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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |