US4183254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive reducer for tape recorder
Assignee: Tapecon Inc
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Filing: 1977-12-15
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Granted: 1980-01-15
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Expires: 1997-12-15
Abstract
Abstract A drive reducer for a tape recorder accomplishes a large reduction from the surface speed of a motor-driven shaft to the surface speed of a drive element for advancing a tape media such as a magnetic recording tape on a flat card. A cup-shaped element is fixed to a reducer shaft and positioned so that the inner surface of a cylindrical outer wall engages the motor-driven shaft. An idler wheel freely rotatable on the reducer shaft is positioned radially inside the cup-shaped element and is formed of compressible material with a diameter large enough for compressibly engaging the motor-driven shaft and pressing it against the inner surface of the outer wall of the cup-shaped element. Rotation of the reducer shaft is transferred to the driven element preferably by a friction sleeve on the reducer shaft and a friction disk engaging the sleeve and turning a shaft supporting the driven element.
Inventors
- 👤 David M. Good
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:38
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/02; G; G11; G11B; G11B25/00; G11B25/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
A drive reducer for a tape recorder having a motor, a shaft driven by said motor, a driven element, a reducer shaft, a generally cup-shaped element fixed to said reducer shaft and having a cylindrical outer wall with a radially inner surface formed of a friction material and positioned to engage said motor-driven shaft, and means for transferring rotation of said reducer shaft derived from said motor-driven shaft and said cup-shaped element to said driven element, said drive reducer comprising: a. an idler wheel concentric with said cup-shaped element and arranged within said outer wall of said cup-shaped element; b. said idler wheel being freely rotatable on said reducer shaft; c. said idler wheel having a radius slightly larger than the distance from the axis of said reducer shaft to the surface of said motor-driven shaft to leave an annular space narrower than the diameter of said motor-driven shaft between said idler wheel and said outer wall of said cup-shaped element; and d. said idler wheel being formed of compressible material compressibly engaging said motor-driven shaft and pressing said motor-driven shaft against said inner surface of said outer wall of said cup-shaped element.
Claim 2
Dependent Claim
193 words
A drive reducer for a tape recorder having a motor, a shaft driven by said motor, a driven element, a reducer shaft, a generally cup-shaped element fixed to said reducer shaft and having a cylindrical outer wall with a radially inner surface formed of a friction material and positioned to engage said motor-driven shaft, and means for transferring rotation of said reducer shaft derived from said motor-driven shaft and said cup-shaped element to said driven element, said drive reducer comprising: a. an idler wheel concentric with said cup-shaped element and arranged within said outer wall of said cup-shaped element; b. said idler wheel being freely rotatable on said reducer shaft; c. said idler wheel having a radius slightly larger than the distance from the axis of said reducer shaft to the surface of said motor-driven shaft to leave an annular space narrower than the diameter of said motor-driven shaft between said idler wheel and said outer wall of said cup-shaped element; and d. said idler wheel being formed of compressible material compressibly engaging said motor-driven shaft and pressing said motor-driven shaft against said inner surface of said outer wall of said cup-shaped element.
Claim 3
Dependent Claim
39 words
The drive reducer of claim 1 wherein said rotation transferring means includes a sleeve of compressible material on said reducer shaft, a friction disk engaging said sleeve, and a shaft rotationally supporting said driven element and said friction disk.
Claim 4
Dependent Claim
29 words
The drive reducer of claim 1 wherein said friction material of said inner surface of said outer wall and said compressible material of said idler wheel are both elastomeric.
Claim 5
Dependent Claim
26 words
The drive reducer of claim 3 wherein said elastomeric materials of said idler wheel and said inner surface of said outer wall have approximately equal durometers.
Claim 6
Dependent Claim
63 words
The drive reducer of claim 1 wherein said rotation transferring means includes a sleeve of compressible material on said reducer shaft, a friction disk engaging said sleeve, and a shaft rotationally supporting said driven element and said friction disk and wherein said friction material of said inner surface of said outer wall and said compressible material of said idler wheel are both elastomeric.
Claim 7
Dependent Claim
26 words
The drive reducer of claim 5 wherein said elastomeric materials of said idler wheel and said inner surface of said outer wall have approximately equal durometers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |