Patent EP0357507A2 successfully refreshed from Google Patents.
US4437129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing apparatus enabling tape transport in the forward and reverse directions
Assignee: Hitachi Ltd
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Filing: 1981-07-08
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Granted: 1984-03-13
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Expires: 2001-07-08
Abstract
Abstract A magnetic recording and reproducing apparatus having a single electromagnet for driving an idler mechanism for driving a take-up reel mount in a forward playback operation, a brake mechanism for a supply reel in a forward playback operation and a brake mechanism for the take-up reel mount. A high speed capstan-driven tape transport in both forward and reverse directions is attained by a simple construction.
Inventors
- 👤 Masashi Yoshida
- 👤 Hajime Yokota
- 👤 Mitsuji Aman
- 👤 Tatsuya Shigemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/665; G11B15/6653; G11B15/6656; G11B15/18; G11B15/22; G11B15/44; G11B15/442
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
214 words
A magnetic recording and reproducing apparatus having an idler mechanism, for rotating a first and second reel mounts with a predetermined torque to pull out a magnetic tape extending between a first reel and a second reel into a predetermined tape path and take up a magnetic tape pinched and driven by a capstan and a pinch roller onto said first reel mount, first braking force applying means for applying a predetermined braking force to said second reel mount and a second braking force applying means for applying a predetermined braking force to said first reel mount, comprising a single electromagnet operatively coupled to said idler mechanism and said first and second braking force applying means such that when a plunger of said electromagnet is at a first position the drive of said reel mounts by said idler mechanism and the brake of said first braking force applying means are released while the brake to said first reel mount by said second braking force applying means is enabled, and when said plunger of said electromagnet is in a second position the drive of said reel mount by said idler mechanism and the brake by said first braking force applying means are enabled while the brake by said second braking force applying means is released.
Claim 2
Dependent Claim
214 words
A magnetic recording and reproducing apparatus having an idler mechanism, for rotating a first and second reel mounts with a predetermined torque to pull out a magnetic tape extending between a first reel and a second reel into a predetermined tape path and take up a magnetic tape pinched and driven by a capstan and a pinch roller onto said first reel mount, first braking force applying means for applying a predetermined braking force to said second reel mount and a second braking force applying means for applying a predetermined braking force to said first reel mount, comprising a single electromagnet operatively coupled to said idler mechanism and said first and second braking force applying means such that when a plunger of said electromagnet is at a first position the drive of said reel mounts by said idler mechanism and the brake of said first braking force applying means are released while the brake to said first reel mount by said second braking force applying means is enabled, and when said plunger of said electromagnet is in a second position the drive of said reel mount by said idler mechanism and the brake by said first braking force applying means are enabled while the brake by said second braking force applying means is released.
Claim 3
Dependent Claim
53 words
A magnetic recording and reproducing apparatus according to claim 1 wherein said plunger of said electromagnet is held in a first position when said magnetic tape is transported reversely while a magnetic tape is loaded in said predetermined tape path and held in said second position when a magnetic tape is transported forwardly.
Claim 4
Dependent Claim
69 words
A magnetic recording and reproducing apparatus according to claim 1 wherein said plunger of said electromagnet is held in said first position during a loading operation for loading a magnetic tape to said predetermined tape path and an unloading operation for unloading a magnetic tape into a cassette, and said second reel mount is imparted with a predetermined rotation torque during said unloading operation to take-up a magnetic tape.
Claim 5
Dependent Claim
116 words
A magnetic recording and reproducing apparatus according to claim 1 wherein said second braking force applying means includes brake means mounted on said first reel mount, engaging means for actuating said brake means when said plunger of said electromagnet is at said first position, transmission means for transmitting the displacement of said plunger of said electromagnet and a spring spanned between said engaging means and said transmission means, said transmission means being responsive to the attraction of said electromagnet to displace against a force of said spring when said engagement means does not properly engage so that said engagement means properly engages by the tension of said spring after said electromagnet has assumed a holding status.
References Cited (Backward Citations)
US3969766A
Cited
US4121267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |