US3754695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic shut-off system for magnetic tape reproducers and recorders
Assignee: Individual
•
Filing: 1972-07-20
•
Granted: 1973-08-28
•
Expires: 1992-07-20
Abstract
Abstract A magnetic tape reproducer and recorder with an automatic switch-off system, including a pressure roller driven by a motor driven shaft and engaged by another shaft which is adapted to be rotated when engaging the pressure roller and to be rotated independently of the pressure roller so as to cause the giving of a signal which causes the starting key or starting button of the tape device to return to its inoperative starting position when the tape has run off.
Inventors
- 👤 N Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:37
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/10; G11B15/18; G11B15/46
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
An automatic switch-off system for a magnetic tape reproducer and recorder provided with a manually operable starting key adapted to be locked by a locking bar in the running position of the reproducer and recorder, said switchoff system comprising a drive shaft, a pivotally mounted pressure roller urging said magnetic tape in engagement with said drive shaft, another shaft extending parallel to said drive shaft, means causing said other shaft to engage said pressure roller and to be displaced away from said pressure roller when after the run-off of said tape the end portion of the same is stopped and arrests the rotation of said pressure roller, and means actuated by said displaced other shaft to unlock said starting key so that the latter returns to its starting position in which the tape recorder and reproducer is switched off.
Claim 2
Dependent Claim
139 words
An automatic switch-off system for a magnetic tape reproducer and recorder provided with a manually operable starting key adapted to be locked by a locking bar in the running position of the reproducer and recorder, said switchoff system comprising a drive shaft, a pivotally mounted pressure roller urging said magnetic tape in engagement with said drive shaft, another shaft extending parallel to said drive shaft, means causing said other shaft to engage said pressure roller and to be displaced away from said pressure roller when after the run-off of said tape the end portion of the same is stopped and arrests the rotation of said pressure roller, and means actuated by said displaced other shaft to unlock said starting key so that the latter returns to its starting position in which the tape recorder and reproducer is switched off.
Claim 3
Dependent Claim
92 words
An automatic switch-off system according to claim 1, including gear means connecting said drive shaft with said other shaft to drive the latter, a pivotally mounted bracket in which said other shaft is rotatably supported, means for rotatably supporting a portion of said gear means in said bracket, spring means attached to said bracket for causing it to move in a direction in which said other shaft engages said pressure roller, said means for causing said other shaft to be moved away from said pressure roller being operatively connected with said bracket.
Claim 4
Dependent Claim
76 words
An automatic switch-off system according to claim 2, in which said gear means comprises three gears all of which have the same diameter, one of said three gears being fixedly Mounted on said drive shaft and another one of said gears being fixedly mounted on said other shaft, while the third gear is in mesh with both of said two first mentioned gears and is rotatable about an axis forming the pivot axis of said bracket.
Claim 5
Dependent Claim
108 words
An automatic switch-off system according to claim 1, including gear means connecting said drive shaft with said other shaft to drive the latter, a pivotally mounted bracket in which said other shaft is rotatably supported, means for rotatably supporting a portion of said gear means in said bracket, spring means attached to said bracket for causing it to move in a direction in which said other shaft engages said pressure roller, said means for causing said other shaft to be moved away from said pressure roller being operatively connected with said bracket, said locking bar being operatively connected with a cancel lever and said manually operable starting key.
References Cited (Backward Citations)
US3632115A
Cited
US3633920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |