US3583618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual capstan drive system
Assignee: Astro Science Corp
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Filing: 1969-09-15
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Granted: 1971-06-08
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Expires: 1989-09-15
Abstract
Abstract Improved magnetic recording apparatus of the dual capstan type is provided, and particularly an improved magnetic tape transport mechanism has been devised for use in such apparatus, and which includes a reversible drive motor and a belt-coupling system between the motor and the two capstans to cause the lead capstan to be rotated at a slightly higher speed than the other capstan, regardless of the direction of movement of the tape, so as to maintain a certain minimum tape tension across the transducer heads of the recording apparatus at all times.
Inventors
- 👤 Richard A Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:29
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
121 words
A mechanism for providing a bidirectional drive for an elongated flexible weblike member along a particular path and for creating a tension in the weblike member as it is drawn along said path, said mechanism including: a first rotatably mounted drive member for said weblike member; a second rotatably mounted drive member for said weblike member spaced along said path from said first drive member; first and second drums mechanically coupled to said first and second drive members respectively; drive means including first and second pulleys; a first resilient belt extending around a peripheral portion of said first pulley and around said drums; and a second resilient belt extending around a peripheral portion of said second pulley and around said drums.
Claim 2
Dependent Claim
121 words
A mechanism for providing a bidirectional drive for an elongated flexible weblike member along a particular path and for creating a tension in the weblike member as it is drawn along said path, said mechanism including: a first rotatably mounted drive member for said weblike member; a second rotatably mounted drive member for said weblike member spaced along said path from said first drive member; first and second drums mechanically coupled to said first and second drive members respectively; drive means including first and second pulleys; a first resilient belt extending around a peripheral portion of said first pulley and around said drums; and a second resilient belt extending around a peripheral portion of said second pulley and around said drums.
Claim 3
Dependent Claim
25 words
The mechanism defined in claim 1 in which said first and second drums have equal radii and said first and second pulleys have different radii.
Claim 4
Dependent Claim
74 words
The mechanism defined in claim 2, in which said first drive member includes a first shaft, said second drive member includes a second shaft parallel to said first shaft, said drive means includes a drive shaft disposed between said first and second shafts and parallel thereto, said equal-radii drums being mounted on said first and second shafts respectively, and said different-radii pulleys being mounted on said drive shaft and spaced at axial positions therealong.
Claim 5
Dependent Claim
19 words
The mechanism defined in claim 3, and which includes reversible electric motor means mechanically coupled to said drive shaft.
Claim 6
Dependent Claim
28 words
The mechanism defined in claim 1, in which said first and second drive members comprise first and second capstans disposed adjacent the path of said flexible weblike member.
Claim 7
Dependent Claim
15 words
The mechanism defined in claim 1, in which said weblike member comprises a magnetic tape.
Claim 8
Dependent Claim
80 words
A mechanism for providing a bidirectional drive including: a first rotatable drive member; a second rotatable drive member spaced from said first drive member; first and second drums mechanically coupled To said first and second drive members respectively; drive means including first and second pulleys; a first resilient belt extending around a peripheral portion of said first pulley and around said drums; and a second resilient belt extending around a peripheral portion of said second pulley and around said drums.
Claim 9
Dependent Claim
80 words
A mechanism for providing a bidirectional drive including: a first rotatable drive member; a second rotatable drive member spaced from said first drive member; first and second drums mechanically coupled To said first and second drive members respectively; drive means including first and second pulleys; a first resilient belt extending around a peripheral portion of said first pulley and around said drums; and a second resilient belt extending around a peripheral portion of said second pulley and around said drums.
Claim 10
Dependent Claim
25 words
The mechanism defined in claim 7 in which said first and second drums have equal radii and said first and second pulleys have different radii.
Claim 11
Dependent Claim
55 words
The mechanism defined in claim 8 in which said first resilient belt and said second resilient belt extend as closed loops around said drums, and in which said first pulley and second pulley are positioned outside of the loops and engaging said first and second resilient belts respectively on opposite sides of the closed loops.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |