Patent US754723A successfully refreshed from Google Patents.
Patent US3872500A successfully refreshed from Google Patents.
US3872500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-speed drive for linear adapter for cassette tape recorder
Assignee: Tapecon Inc
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Filing: 1973-05-21
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Granted: 1975-03-18
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Expires: 1993-05-21
Abstract
Abstract A two-speed drive for a linear adapter for a cassette tape recorder has a drive wheel that fits over the take-up shaft of the recorder and engages and drives a pulley. An endless belt passes around the pulley and over the capstan of the recorder for regulating the speed of the pulley when the recorder''s pinch roller presses the belt against the capstan. A friction roller is coaxial with the pulley and turns with the pulley approximately tangent to a slot so that a linear recording element can be pressed against the friction roller and driven through the slot.
Inventors
- 👤 Albert F Wild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:45
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
A two-speed drive for a linear adapter for a cassette tape recorder having a capstan, a pinch roller, and a driven take-up shaft, said driving comprising: a. a drive wheel having a central opening for fitting over said take-up shaft to turn with said take-up shaft; b. a pulley driven by said drive wheel; c. an endless belt passing around said pulley and over said capstan between said capstan and said pinch roller to regulate the speed of said pulley when said pinch roller presses said belt against the capstan; d. means for tensioning and guiding said belt over said capstan; e. a friction roller coaxial with said pulley and turning with said pulley at a regulated speed when said pinch roller presses said belt against said capstan and at a faster speed when said pinch roller is clear of said belt and said capstan; f. a linear drive slot approximately tangent to said friction roller; and g. means for pressing a linear recording element against said friction roller for traversing said slot.
Claim 2
Dependent Claim
173 words
A two-speed drive for a linear adapter for a cassette tape recorder having a capstan, a pinch roller, and a driven take-up shaft, said driving comprising: a. a drive wheel having a central opening for fitting over said take-up shaft to turn with said take-up shaft; b. a pulley driven by said drive wheel; c. an endless belt passing around said pulley and over said capstan between said capstan and said pinch roller to regulate the speed of said pulley when said pinch roller presses said belt against the capstan; d. means for tensioning and guiding said belt over said capstan; e. a friction roller coaxial with said pulley and turning with said pulley at a regulated speed when said pinch roller presses said belt against said capstan and at a faster speed when said pinch roller is clear of said belt and said capstan; f. a linear drive slot approximately tangent to said friction roller; and g. means for pressing a linear recording element against said friction roller for traversing said slot.
Claim 3
Dependent Claim
28 words
The drive of claim 1 wherein said regulated speed of the surface of said friction roller is substantially slower than the speed of the surface of said capstan.
Claim 4
Dependent Claim
16 words
The drive of claim 1 wherein said drive wheel has a friction rim engaging said pulley.
Claim 5
Dependent Claim
17 words
The drive of claim 3 wherein said drive wheel rim engages an inside surface of said pulley.
Claim 6
Dependent Claim
28 words
The drive of claim 4 wherein said regulated speed of the surface of said friction roller is substantially slower than the speed of the surface of said capstan.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |