US3873993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape transport with fast forward speed
Assignee: Staar SA
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Filing: 1973-10-10
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Granted: 1975-03-25
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Expires: 1993-10-10
Abstract
Abstract A transport mechanism for driving a tape from reel to reel at recording-playback speed or fast forward speed is disclosed. A capstan drive is provided for driving the tape at constant recording-playback speed, and a direct drive via the take-up reel is provided for driving the tape at fast forward speed. The transport mechanism also includes an actuator for sequentially shifting the magnetic head used for recording or playback away from the tape before the tape is released from the capstan drive upon selection of fast foward speed, to eliminate sound caused by playback at high speed of the frequencies recorded on the tape.
Inventors
- 👤 Theophiel Clement Jozef Staar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:17
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/1883
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
281 words
In a transport mechanism for driving a tape from reel to reel selectively at recording-playback speed or fast speed, said transport mechanism having a capstan drive for driving the tape at recording-playback speed and a take-up drive means for one of the reels to drive the tape at a fast speed, said take-up drive means including a friction device which slips when said capstan drive is engaged to absorb the varying differential between recording-playback speed and the higher speed at which said one reel is driven via said take-up drive means, the combination comprising: a capstan drive for the tape including a capstan and a shiftable pressure roller movable into and out of engagement with said capstan, a movable lever carrying said pressure roller for shifting movement, said lever being displaceable from a first position in which said capstan drive is engaged with said pressure roller pressing the tape against said capstan, to a second position in which said tape is released from said capstan drive and said pressure roller is located away from the tape, a magnetic head for recording or playback of sound recording on the tape, a support for said head movably carried for movement independently of said lever, said support being displaceable from a first position in which said head is engaged with the tape, to a second position in which said head is located away from the tape, and actuator means for sequentially shifting said support and said lever from their first to their second positions to move the head away from the tape before releasing the tape from said capstan drive for transport at fast speed from reel to reel by said take-up drive means.
Claim 2
Dependent Claim
281 words
In a transport mechanism for driving a tape from reel to reel selectively at recording-playback speed or fast speed, said transport mechanism having a capstan drive for driving the tape at recording-playback speed and a take-up drive means for one of the reels to drive the tape at a fast speed, said take-up drive means including a friction device which slips when said capstan drive is engaged to absorb the varying differential between recording-playback speed and the higher speed at which said one reel is driven via said take-up drive means, the combination comprising: a capstan drive for the tape including a capstan and a shiftable pressure roller movable into and out of engagement with said capstan, a movable lever carrying said pressure roller for shifting movement, said lever being displaceable from a first position in which said capstan drive is engaged with said pressure roller pressing the tape against said capstan, to a second position in which said tape is released from said capstan drive and said pressure roller is located away from the tape, a magnetic head for recording or playback of sound recording on the tape, a support for said head movably carried for movement independently of said lever, said support being displaceable from a first position in which said head is engaged with the tape, to a second position in which said head is located away from the tape, and actuator means for sequentially shifting said support and said lever from their first to their second positions to move the head away from the tape before releasing the tape from said capstan drive for transport at fast speed from reel to reel by said take-up drive means.
Claim 3
Dependent Claim
68 words
In a transport mechanism, the combination according to claim 1 in which resilient means are connected to both said lever and said support tending to urge said pressure roller and head into tape engagement, and said actuator is movable by manual force, the sequential shifting of said lever and said support requiring less force to move said actuator means during the initial support shifting portion of its stroke.
Claim 4
Dependent Claim
38 words
In a transport mechanism, the combination according to claim 1 in which said actuator means and said support comprise a common element, and said element is engageable to move said lever after an initial support shifting stroke portion.
Claim 5
Dependent Claim
34 words
In a transport mechanism, the combination according to claim 1 in which said lever is pivotally mounted, and resilient means are connected to said lever tending to urge said pressure roller into tape engagement.
Claim 6
Dependent Claim
32 words
In a transport mechanism, the combination according to claim 1 in which said support is engageable with said lever in response to movement by said actuator means to achieve sequential shifting thereof.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |