Patent US3898691A successfully refreshed from Google Patents.
US3898691A
Expired / Lapsed
US
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Incremental tape drive with clamp and deflector
Assignee: Kokusai Gijutsu Kaihatsu Co Ltd
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Filing: 1973-10-12
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Granted: 1975-08-05
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Expires: 1993-10-12
Abstract
Abstract In an incremental digital magnetic tape recorder in which a magnetic tape is advanced intermittently for recording intermittent input signals, there are provided braking means for applying a braking force upon the magnetic tape, means for applying a torque upon a tape take up reel for taking up the tape under a predetermined tension smaller than the braking force, and a deflector for deflecting a portion of the magnetic tape extending between the magnetic head and the take up reel in a direction lateral to the direction of normal movement of the tape. For the purpose of providing the ''''read-after-write'''' feature, deflectors are provided on the opposite sides of the magnetic portion of the tape with a so that a portion of the head just completed recording of a signal can be immediately moved back to reproduce and check the recorded signal.
Inventors
- 👤 Shunsaku Nakauchi
- 👤 Yasuo Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
148 words
In an incremental digital magnetic tape recording apparatus in which a magnetic tape is advanced intermittently passing through a magnetic write/read recording head between a pair of tape supply and take up means for recording intermittent input signals, the improvement which comprises braking means for applying a braking force upon said magnetic tape, means for applying a torque upon said take up means to take up said magnetic tape under a predetermined tension smaller than said braking force, and deflector means for deflecting said magnetic tape away from the direction of its normal travel between said magnetic head and said take up and supply means, said deflector means being provided on each side of said magnetic head for incrementally advancing said tape in the take-up direction for writing and alternately incrementally stepping the tape in the reverse direction toward the tape supply means for read after write checking.
Claim 2
Dependent Claim
148 words
In an incremental digital magnetic tape recording apparatus in which a magnetic tape is advanced intermittently passing through a magnetic write/read recording head between a pair of tape supply and take up means for recording intermittent input signals, the improvement which comprises braking means for applying a braking force upon said magnetic tape, means for applying a torque upon said take up means to take up said magnetic tape under a predetermined tension smaller than said braking force, and deflector means for deflecting said magnetic tape away from the direction of its normal travel between said magnetic head and said take up and supply means, said deflector means being provided on each side of said magnetic head for incrementally advancing said tape in the take-up direction for writing and alternately incrementally stepping the tape in the reverse direction toward the tape supply means for read after write checking.
Claim 3
Dependent Claim
23 words
The magnetic tape recording apparatus according to claim 1 wherein said braking means is positioned between said magnetic head and said supply means.
Claim 4
Dependent Claim
36 words
The magnetic tape recording apparatus according to claim 1 wherein said braking means is positioned to cooperate with said magnetic head and further includes additional braking means positioned between said magnetic head and said supply means.
Claim 5
Dependent Claim
105 words
The magnetic tape recording apparatus according to claim 3 wherein a pair of guide rollers are provided on the opposite sides of said magnetic head, one of said deflector means is positioned between said magnetic head and one of said guide rollers which is provided on the side of said tape take up means, the other of said deflector means is positioned between said magnetic head and the other of said guide rollers, and a tension arm normally biased toward said magnetic tape is provided between said magnetic head and the other guide roller which is provided on the side of said tape supply means.
Claim 6
Dependent Claim
57 words
The magnetic tape recording apparatus according to claim 4 wherein the inertia of the supply and take-up means, the braking force of the braking means, and the operating force of the deflector means are all suitably selected to move the tape a definite length delta L past the magnetic head upon each stroke of the deflector means.
Claim 7
Dependent Claim
28 words
The magnetic tape recording apparatus according to claim 5 wherein said deflector means comprise a pair of discrete deflectors positioned on the opposite side of said magnetic head.
Claim 8
Dependent Claim
53 words
The magnetic tape recording apparatus according to claim 5 wherein said deflector means comprises driving means, and a push rod operated by said driving means and pivotaLly supported at its intermediate point, said push rod having spaced apart arms adapted to engage said magnetic tape on the opposite sides of said magnetic head.
Claim 9
Dependent Claim
111 words
The magnetic tape recording apparatus according to claim 5 wherein a pair of guide rollers are provided adjacent said tape supply means and said tape take up means respectively, a first braking device is associated with said magnetic head, a second braking device is positioned between said magnetic head and one guide roller positioned on the side of said supply means, a tension arm normally biased to engage said tape is provided between said second braking device and said one guide roller and said deflector means is positioned to engage said tape between said magnetic head and said second braking device and between said magnetic head and the other guide roller.
Claim 10
Dependent Claim
131 words
The magnetic tape recording apparatus according to claim 7 wherein a pair of guide rollers are disposed between said magnetic head and said tape supply and take up means, a first braking device is associated with said magnetic head, second and third braking devices are associated with said pair of guide rollers, respectively, said arms of said push rod are arranged to engage portions of said magnetic tape extending respectively between said magnetic head and one guide roller positioned on the side of said supply means and between said magnetic head and the other guide roller positioned on the side of said take up means, and said push rod is provided at its opposite ends with a pair of leaf springs for cooperating with said second and third braking devices, respectively.
Claim 11
Dependent Claim
59 words
The magnetic tape recording apparatus according to claim 9 wherein a tension arm normally biased toward said magnetic tape is provided, said tension arm engaging said magnetic tape at substantially the same point as one of said arms of said push rod between said magnetic head and said one guide roller positioned on the side of said supply means.
Claim 12
Dependent Claim
19 words
The magnetic tape recording apparatus according to claim 1 wherein said deflector means is operated by a solenoid coil.
Claim 13
Dependent Claim
21 words
The magnetic tape recording apparatus according to claim 1 wherein said deflector means is operated by a moving coil type actuator.
Claim 14
Dependent Claim
19 words
The magnetic tape recording apparatus according to claim 1 wherein said deflector means is operated by a pneumatic actuator.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |