US3729148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape apparatus with graduated brake and/or motor torque for controlling tape winding
Assignee: Siemens AG
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Filing: 1971-09-17
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Granted: 1973-04-24
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Expires: 1991-09-17
Abstract
Abstract A magnetic tape apparatus where the tape feed is uncoupled from the inert tape coils with the aid of buffer systems, and the speed is controlled as a function of the increase and/or decrease of the tape past at least one gate, wherein passage of a barrier by the tape in one direction provides a highly increased brake torque and passage of the gate or barrier in the other direction provides a highly increased motor torque, either of which torques are markedly decreased after a certain time in synchronism with the operation of the tape control system.
Inventors
- 👤 K Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:56
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56; G11B15/58; H; H02; H02P; H02P5/00; H02P5/46; H02P5/48; H02P5/485
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
In a magnetic tape apparatus of the type wherein the tape feed is uncoupled from the inert tape coils with the aid of a buffer system, and the tape speed is controlled as a function of the passage of the tape across at least one sensing barrier to control the operation of a motor and a brake, the improvement therein comprising first means responsive to the passage of the tape across the barrier in a first direction to apply a stepped braking torque at the brake, and second means responsive to the passage of the tape across the barrier in the other direction to apply a stepped driving torque at the motor, each of said torques having the character of a relatively high initial and constant value for a predetermined period of time followed by a relatively low constant value until passage of the tape back across the sensing barrier.
Claim 2
Dependent Claim
150 words
In a magnetic tape apparatus of the type wherein the tape feed is uncoupled from the inert tape coils with the aid of a buffer system, and the tape speed is controlled as a function of the passage of the tape across at least one sensing barrier to control the operation of a motor and a brake, the improvement therein comprising first means responsive to the passage of the tape across the barrier in a first direction to apply a stepped braking torque at the brake, and second means responsive to the passage of the tape across the barrier in the other direction to apply a stepped driving torque at the motor, each of said torques having the character of a relatively high initial and constant value for a predetermined period of time followed by a relatively low constant value until passage of the tape back across the sensing barrier.
Claim 3
Independent Claim
146 words
The method of controlling tape feed in a magnetic tape system which includes a buffer system to uncouple the tape feed from the inert tape coils wherein the tape speed is controlled as a function of the passage of the tape across at least one sensing barrier, said method comprising the steps of applying a stepped braking torque of a relatively high constant value followed by a relatively low constant value in response to sensing tape passage across the barrier in a first direction, and applying a stepped driving torque at the motor, each of said torques having the characteristic of a relatively high initial and constant value for a predetermined period of time followed by a relatively low constant value until passage of the tape back across the sensing barrier in response to sensing passage of the tape across the barrier in a second dIrection.
Claim 4
Independent Claim
146 words
The method of controlling tape feed in a magnetic tape system which includes a buffer system to uncouple the tape feed from the inert tape coils wherein the tape speed is controlled as a function of the passage of the tape across at least one sensing barrier, said method comprising the steps of applying a stepped braking torque of a relatively high constant value followed by a relatively low constant value in response to sensing tape passage across the barrier in a first direction, and applying a stepped driving torque at the motor, each of said torques having the characteristic of a relatively high initial and constant value for a predetermined period of time followed by a relatively low constant value until passage of the tape back across the sensing barrier in response to sensing passage of the tape across the barrier in a second dIrection.
Claim 5
Dependent Claim
121 words
In a magnetic tape apparatus of the type wherein the tape feed is uncoupled from the inert tape coils with the aid of a buffer system, and the tape speed is controlled as a function of the passage of the tape across at least one sensing barrier to control the operation of a pair of torque applying devices including a motor and a brake, the improvement therein comprising: means responsive to the passage of the tape across the sensing barrier to operate at least one of the torque applying devices to apply a stepped torque to the tape coils of a first magnitude for a predetermined interval followed by a much lesser second magnitude until the tape repasses the sensing barrier.
Claim 6
Dependent Claim
121 words
In a magnetic tape apparatus of the type wherein the tape feed is uncoupled from the inert tape coils with the aid of a buffer system, and the tape speed is controlled as a function of the passage of the tape across at least one sensing barrier to control the operation of a pair of torque applying devices including a motor and a brake, the improvement therein comprising: means responsive to the passage of the tape across the sensing barrier to operate at least one of the torque applying devices to apply a stepped torque to the tape coils of a first magnitude for a predetermined interval followed by a much lesser second magnitude until the tape repasses the sensing barrier.
Claim 7
Dependent Claim
96 words
The improvement set forth in claim 3, wherein said means comprises time delay means, first and second switching means connected in series between said one torque applying device and an electrical supply, said first switching means normally open and said second switching means normally closed, an impedance in parallel with said second switching means, said first and second switching means connected to and operatively controlled by the sensing barrier and said time delay means interposed between said second switching means and the sensing barrier to delay opening of said second switching means for said predetermined interval.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |