US3731885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape reel and hub assembly
Assignee: Ampex Corp
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Filing: 1970-08-24
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Granted: 1973-05-08
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Expires: 1990-08-24
Abstract
Abstract To facilitate automatic self-threading operation, a helical scan magnetic tape apparatus is arranged so that the tape centerline follows a path substantially parallel to the top plate of the machine, the scanning drum and guides therefor being tilted at an angle to the top plate. Exit and entrance guides for the tape at the drum are parallel to the drum axis and therefore also tilted, but all other tape guides are normal to the top plate. The tape is taken off the entrance and exit guides at a predetermined angle that ensures parallelism of the tape centerline to the top plate. A supply reel with the tape and a stiff leader mounted thereon is provided, together with means for driving the leader to the takeup reel, which is provided with means for securing and wrapping the leader and tape. The drum is also arranged for precise change of tilt to facilitate stop and slow motion effects. The tape supply reel is arranged for quick and easy mounting on, and removal from the apparatus. A scanner assembly transformer signal coupling and tachometer is also provided.
Inventors
- 👤 R Siebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:00
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/037; G11B15/00; G11B15/60; G11B15/66; G11B15/662; G11B15/67
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
232 words
In a tape reel and hub assembly of the class including means on said hub for supporting said reel, a plurality of movable detent elements spaced peripherally around said hub for engaging said reel and holding said reel on said supporting means, said detent elements being spring-loaded toward a reel engaging and holding position, but being movable away from said reel engaging and holding position to a reel releasing position, manually operable cam means mounted on said hub for moving said detent elements to said reel releasing position, means mounted on said hub and engageable by said cam means for positively ejecting said reel away from said supporting means when said cam means is operated, a hollow cylindrical wall on said reel for winding said tape thereon, a pair of spaced outwardly extending side flanges, and an inwardly extending flange for engagement with said detent elements, the combination wherein: said reel supporting means is a turntable flange extending outwardly from said hub; and each of said detent elements is a hook-shaped lever pivotably mounted on said hub and extending into said hollow cylindrical wall of said reel so as to hook over said inwardly extending flange thereof and hold said reel against said turntable; each detent element being pivotable to pivot the hook-shaped portion thereof inwardly to release said inwardly extending flange of said reel, but being spring-loaded towards the reelengaging position.
Claim 2
Dependent Claim
232 words
In a tape reel and hub assembly of the class including means on said hub for supporting said reel, a plurality of movable detent elements spaced peripherally around said hub for engaging said reel and holding said reel on said supporting means, said detent elements being spring-loaded toward a reel engaging and holding position, but being movable away from said reel engaging and holding position to a reel releasing position, manually operable cam means mounted on said hub for moving said detent elements to said reel releasing position, means mounted on said hub and engageable by said cam means for positively ejecting said reel away from said supporting means when said cam means is operated, a hollow cylindrical wall on said reel for winding said tape thereon, a pair of spaced outwardly extending side flanges, and an inwardly extending flange for engagement with said detent elements, the combination wherein: said reel supporting means is a turntable flange extending outwardly from said hub; and each of said detent elements is a hook-shaped lever pivotably mounted on said hub and extending into said hollow cylindrical wall of said reel so as to hook over said inwardly extending flange thereof and hold said reel against said turntable; each detent element being pivotable to pivot the hook-shaped portion thereof inwardly to release said inwardly extending flange of said reel, but being spring-loaded towards the reelengaging position.
Claim 3
Dependent Claim
67 words
In a tape reel and hub assembly, the combination recited in claim 1, wherein: said manually operable cam means is a push-button mounted for axial sliding movement on said hub and having a cavity defined by a downwardly diverging hollow conical cam surface fitting around the upwardly extending ends of said detent elements so as to urge said elements radially inwardly when said push-button is pressed downwardly.
Claim 4
Dependent Claim
30 words
In a tape reel and hub assembly, the combination recited in claim 2, wherein said detent elements have tapered upper ends mating with said conical cam surface of said push-button.
Claim 5
Dependent Claim
108 words
In a tape reel and hub assembly, the combination recited in claim 3 wherein: said ejecting means includes at least one bell crank arm pivotably mounted on said hub and having a portion extending upwardly into said cavity of said push-button, said portion having a tapered end for engaging said conical cam surface of said push-button so as to be pivoted radially inwardly when said push-button is moved downwardly; said bell crank also having an extension directed radially outwardly beneath said reel and engaging the bottom side flange thereof for pivoting upwardly and positively ejecting said reel away from said turntable flange when said push-button is pushed downwardly.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |