US3617652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for controlling the recording of signals on magnetic storage devices
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1969-06-06
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Granted: 1971-11-02
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Expires: 1989-06-06
Abstract
Abstract An arrangement for controlling the recording of signals on magnetic storage devices while the recording process takes place. Magnetic tape has information recorded on it through tracks which are inclined to the direction of motion of the tape. Viewed from the direction of motion of the magnetic tape, a control magnetic head is located behind the recording head. An electromagnetic coil wound upon the control magnetic head directs magnetic flux lines perpendicular to the direction of the recorded tracks. A voltage signal dependent upon the central magnetization of the tracks is generated and indicated. The electromagnetic coil may be in the form of an oscillating circuit with resonance frequency as a function of the magnetization of the tracks. A signal varying with the resonance frequency is indicated.
Inventors
- 👤 Gerhard Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:49
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B15/00; G11B15/02; G11B15/05; G11B15/087; G11B5/48; G11B5/488; G11B5/4893; H; H04; H04N; H04N17/00; H04N17/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
111 words
An arrangement for controlling the recording of signals on magnetic storage means comprising, in combination, magnetic storage means moving along a predetermined direction; recording means for recording signals on said magnetic storage means, said storage means having tracks inclined to said predetermined direction; control magnetic head means located behind said recording means in the direction of motion of said magnetic storage means; electromagnetic coil means on said control magnetic head means for directing magnetic flux lines perpendicular to the direction of said tracks; and means including said control magnetic head for generating a signal dependent upon the degree of magnetization of said tracks and independent of the polarization of said magnetization.
Claim 2
Dependent Claim
111 words
An arrangement for controlling the recording of signals on magnetic storage means comprising, in combination, magnetic storage means moving along a predetermined direction; recording means for recording signals on said magnetic storage means, said storage means having tracks inclined to said predetermined direction; control magnetic head means located behind said recording means in the direction of motion of said magnetic storage means; electromagnetic coil means on said control magnetic head means for directing magnetic flux lines perpendicular to the direction of said tracks; and means including said control magnetic head for generating a signal dependent upon the degree of magnetization of said tracks and independent of the polarization of said magnetization.
Claim 3
Dependent Claim
62 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 1, wherein said electromagnetic coil means comprises an oscillating circuit with an applied AC voltage, the resonance frequency of said oscillating circuit being dependent upon the magnetization of said magnetic storage means tracks, variations in said resonance frequency being convertible into variations of said AC voltage.
Claim 4
Dependent Claim
54 words
The arrangement for controlling the recording of sigNals on magnetic storage means as defined in claim 1 including means for applying a constant direct current to said electromagnetic coil means on said control magnetic head means; means in the magnetic circuit for measuring the magnetic flux; and indicating means for indicating said voltage signal.
Claim 5
Dependent Claim
33 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 3, wherein said means in said magnetic circuit for measuring the magnetic flux comprises a field plate.
Claim 6
Dependent Claim
58 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 1, wherein the magnetic circuit of said control magnetic head means is in form of a bridge circuit having a branch with a gap formed from two member parts, and having another branch with two member parts supporting said electromagnetic coil means.
Claim 7
Dependent Claim
56 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 5 including field plate means in the diagonal of said bridge circuit corresponding to the magnetic flux path, said field plate means measuring said magnetic flux; and means for indicating said voltage signal dependent upon the magnetization of said tracks.
Claim 8
Dependent Claim
65 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 5 including means for applying AC voltages of opposite phase to the terminal ends of said coil means, the amplitudes of said opposite AC voltages being substantially equal; and means for indicating the resulting output voltage from said coil means dependent upon the magnetization of said magnetic storage means.
Claim 9
Dependent Claim
42 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 1, wherein said recording means comprises a plurality of recording heads, the control over the tracks of the different recording heads being under cyclical interchange control.
Claim 10
Dependent Claim
57 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 8 including oscilloscope means for indicating said voltage signal, said voltage signal being applied to one pair of plates of said oscilloscope; and means for generating a timing signal voltage for applying to the other pair of plates of said oscilloscope.
Claim 11
Dependent Claim
44 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 9 including a rotating member for carrying said recording heads, said timing signal voltage being generated synchronously as a function of the rotational frequency of said rotating member.
Claim 12
Dependent Claim
41 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 8 including means for selectively measuring voltage as a function of time; and indicating means for indicating the magnetization of the individual tracks in sequence.
Claim 13
Dependent Claim
46 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 8 including means for selectively measuring voltage as a function of time; and means for indicating when the magnetization of the individual tracks falls outside lower and upper predetermined limits.
Claim 14
Dependent Claim
25 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 12, wherein said indicating means comprises an optical indicator.
Claim 15
Dependent Claim
25 words
The arrangement for controlling the recording of signals on magnetic storage means as defined in claim 12, wherein said indicating means comprises an acoustical indicator.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |