US3772664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incremental tape drive with optically derived control pulses
Assignee: Individual
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Filing: 1971-07-13
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Granted: 1973-11-13
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Expires: 1991-07-13
Abstract
Abstract First and second information sequence are stored characterinterlaced on magnetic tape. Bits representing characters are stored serially, each character occupying a determined length of tape. Second track on tape has markings extending the length of each character of first information sequence. Stepwise tape transport has constant speed driving phase and variable speed starting and braking phase. The markings on second track are sensed and control transport means so that the transport drive phase coincides with read out of character from selected one of the two sequences.
Inventors
- 👤 K Schlickeiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:18
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/01; G06K7/016; G06K7/0163; G06K13/00; G06K13/18; G11; G11B; G11B15/00; G11B15/18; G11B15/20; G11B15/46; G11B15/52; G11B5/00; G11B5/008
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
287 words
Digital storage arrangement storing 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, comprising, in combination, elongated signal carrier means having a first track, said first track having said first and second information sequence recorded thereon bit serially and in character-interlaced form, each of said characters occupying a determined character length along said first track, said elongated signal carrier means further having a second track having a plurality of markings indicative of the beginning and end of each of said characters of said first information sequence; transport means for effecting stepwise transport of said elongated signal carrier means along a predetermined path, said transport means having a starting phase of increasing speed, a driving phase of substantially constant speed, and a braking phase of decreasing speed; read-write means positioned in operative proximity to said first track of said elongated signal carrier means; sensing means for sensing said markings on said second track and furnishing marking signals in response thereto; and control circuit means connected to said sensing means and said transport means for controlling said transport means in dependence upon said marking signals and a first and second externally furnished selection signal, in such a manner that said transport means is in said driving phase when portions of said elongated signal carrier means assigned to said first information sequence pass in operative vicinity of said read-write means in the presence of sad first selection signal, and that said transport means is in said driving phase when portions of said elongated signal carrier means assigned to said second information sequence pass said read-write means in the presence of said second selection signal.
Claim 2
Dependent Claim
287 words
Digital storage arrangement storing 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, comprising, in combination, elongated signal carrier means having a first track, said first track having said first and second information sequence recorded thereon bit serially and in character-interlaced form, each of said characters occupying a determined character length along said first track, said elongated signal carrier means further having a second track having a plurality of markings indicative of the beginning and end of each of said characters of said first information sequence; transport means for effecting stepwise transport of said elongated signal carrier means along a predetermined path, said transport means having a starting phase of increasing speed, a driving phase of substantially constant speed, and a braking phase of decreasing speed; read-write means positioned in operative proximity to said first track of said elongated signal carrier means; sensing means for sensing said markings on said second track and furnishing marking signals in response thereto; and control circuit means connected to said sensing means and said transport means for controlling said transport means in dependence upon said marking signals and a first and second externally furnished selection signal, in such a manner that said transport means is in said driving phase when portions of said elongated signal carrier means assigned to said first information sequence pass in operative vicinity of said read-write means in the presence of sad first selection signal, and that said transport means is in said driving phase when portions of said elongated signal carrier means assigned to said second information sequence pass said read-write means in the presence of said second selection signal.
Claim 3
Dependent Claim
96 words
An arrangement as set forth in claim 1 further comprising means connecting said control circuit means to said read-write means; wherein said control circuit means have a data transmission terminal; and wherein said control circuit means comprise logic circuit means controlled by said external selection signals and said marking signals, for permitting transmission of signals between said data transmission terminal and said read-write means during said driving phase of said transport means, and blocking transmission of signals between said data transmission terminal and said read-write means during said starting and braking phases of said transport means.
Claim 4
Dependent Claim
58 words
An arrangement as set forth in claim 2, wherein each of said markings extends 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 corresponding one of said characters of said first information sequence along said first track.
Claim 5
Dependent Claim
26 words
An arrangement as set forth in claim 3, wherein the distance between said sequential ones of said markings is substantially equal to said determined character length.
Claim 6
Dependent Claim
51 words
An arrangement as set forth in claim 4, wherein the distance traveled by a given point on said elongated signal carrier means along said predetermined path during said driving phase is substantially equal to the sum of the distances traveled by said point during said starting plase and said braking phase.
Claim 7
Dependent Claim
84 words
An arrangement as set forth in claim 5, wherein said logic circuit means comprise a first AND gate having a first and second input and an output; means connecting said first input to said read-write means; selector switch means connected to said sensing means and furnishing a selector signal at a selector output in the presence or absence of said marking signals under control of said first or second selEction signal respectively; and means connecting said second AND gate input to said selector output.
Claim 8
Dependent Claim
46 words
An arrangement as set forth in claim 6, wherein said selector signal is a pulse having a trailing edge; and wherein said control circuit means comprises additional circuit means responsive to said trailing edge of said pulse for initiating said braking phase of said transport means.
Claim 9
Dependent Claim
17 words
An arrangement as set forth in claim 7, wherein said additional circuit means comprise a differentiating circuit.
Claim 10
Dependent Claim
37 words
An arrangement as set forth in claim 5, wherein the distance traveled by said point along said predetermined path during said braking phase is substantially equal to the distance traveled by said point during said starting phase.
Claim 11
Dependent Claim
117 words
An arrangement as set forth in claim 7, wherein said selector switch means comprise an OR gate having an OR gate output connected to said second input of said first AND gate, and a first and second OR gate input; a second AND gate having an output connected to said first OR gate input, a first input connected to said sensing means and a second input connected to receive said first selector signal; a third AND gate having an output connected to said second OR gate input, a first input connected to receive said second selector signal, and a second input; and inverter means connecting said sensing means to said second input of said third AND gate.
Claim 12
Dependent Claim
21 words
An arrangement as set forth in claim 10, further comprising pulse shaping means connected to the output of said sensing means.
Claim 13
Dependent Claim
22 words
An arrangement as set forth in claim 11, further comprising additional pulse shaping means connected to the output of said read-write means.
Claim 14
Dependent Claim
18 words
An arrangement as set forth in claim 4, wherein each of said markings comprises a substantially rectangular perforation.
Claim 15
Dependent Claim
16 words
An arrangement as set forth in claim 13, wherein said sensing means comprise optical sensing means.
Claim 16
Dependent Claim
47 words
An arrangement as set forth in claim 14, wherein said optical sensing means comprise a light source, and a photosensitive element positioned in such a manner relative to said elongated signal carrier means that said perforations provide a path from said light source to said photosensitive element.
Claim 17
Dependent Claim
34 words
An arrangement as set forth in claim 15, wherein said elongated signal carrier means comprise a magnetic tape; further comprising tape guide rods; and wherein said light path includes reflection from said guide rod.
Claim 18
Dependent Claim
32 words
An arrangement as set forth in claim 16, wherein said path of said light is at a small predetermined angle to a line perpendicular to the direction of transport of said tape.
Claim 19
Dependent Claim
17 words
An arrangement as set forth in claim 17, wherein said magnetic tape is housed in a cassette.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |