US3853024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two speed drive system for print mechanism or the like
Assignee: International Business Machines Corp
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Filing: 1973-10-29
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Granted: 1974-12-10
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Expires: 1993-10-29
Abstract
Abstract A two-speed unidirectional drive system has a single-speed reversible drive motor with an output shaft having a first unidirectional drive assembly mounted thereon. A second unidirectional drive assembly is mounted on a parallel idler shaft. The drive assemblies each have a drive gear and a drive pulley concentrically mounted on the respective shafts and a free-wheeling clutch coupling the drive pulleys to the respective shafts. The drive gears are in driving engagement when mounted on the motor and idler drive shafts producing counter rotation thereof. The free-wheeling clutches couple the drive pulleys to the drive motor and idler drive shafts to rotate the pulleys in the same direction. Drive belt means connects the drive pulleys with a driven pulley assembly on a driven shaft. Dual speed is obtained by using drive gears, drive pulleys, driven pulleys or any combination thereof with different size ratios.
Inventors
- 👤 A Vesci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:55
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/003; B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J29/00; B41J29/38; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19172
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A two-speed unidirectional drive system comprising a single-speed reversible motor with an output shaft, a first drive gear and a first drive pulley concentrically supported on said output shaft, a first free-wheeling clutch mechanism coupling said first drive pulley in a first rotational direction to said output shaft, an idler shaft parallel with said output shaft, a second drive gear and a second drive pulley concentrically supported on said idler shaft in coplanar relation with said first drive gear and said first drive pulley respectively, said second drive gear having a driving connection with said first drive gear, a second free-wheeling clutch mechanism coupling said second drive pulley in said first rotational direction to said idler shaft, said first and second drive gears or said first and second drive pulleys or both being a different size whereby a dual speed unidirectional rotation of various ratios is obtained a driven shaft parallel with said output and said idler shaft, a driven pulley fixedly coupled to said driven shaft, and a drive belt connecting said first and second drive pulley and said driven pulley.
Claim 2
Dependent Claim
182 words
A two-speed unidirectional drive system comprising a single-speed reversible motor with an output shaft, a first drive gear and a first drive pulley concentrically supported on said output shaft, a first free-wheeling clutch mechanism coupling said first drive pulley in a first rotational direction to said output shaft, an idler shaft parallel with said output shaft, a second drive gear and a second drive pulley concentrically supported on said idler shaft in coplanar relation with said first drive gear and said first drive pulley respectively, said second drive gear having a driving connection with said first drive gear, a second free-wheeling clutch mechanism coupling said second drive pulley in said first rotational direction to said idler shaft, said first and second drive gears or said first and second drive pulleys or both being a different size whereby a dual speed unidirectional rotation of various ratios is obtained a driven shaft parallel with said output and said idler shaft, a driven pulley fixedly coupled to said driven shaft, and a drive belt connecting said first and second drive pulley and said driven pulley.
Claim 3
Dependent Claim
214 words
A two-speed unidirectional drive system comprising a single-speed reversible motor with an output shaft; a first unidirectional drive assembly mounted on said output shaft, comprising a first drive gear attached to said shaft, a first drive pulley concentrically supported on said shaft and a first free-wheeling clutch mechanism coupling said first drive pulley in a first rotational direction to said output shaft; an idler shaft parallel with said output shaft; a second unidirectional drive assembly mounted on said idler shaft comprising a second drive gear and a second drive pulley concentrically supported on said idler shaft in coplanar relation with said first drive gear and said first drive pulley respectively, said second drive gear having a driving connection with said first drive gear; a second free-wheeling clutch mechanism coupling said second drive pulley in said first rotational direction to said idler shaft, said first and second drive gears or said first and second drive pulleys or both being a different size whereby a dual speed unidirectional rotation of various ratios is obtained; a driven shaft parallel with said output and said idler shaft; pulley means coupled to said driven shaft; drive belt means connecting said first and second drive pulleys of said first and drive assemblies and said pulley means of said driven shaft.
Claim 4
Dependent Claim
214 words
A two-speed unidirectional drive system comprising a single-speed reversible motor with an output shaft; a first unidirectional drive assembly mounted on said output shaft, comprising a first drive gear attached to said shaft, a first drive pulley concentrically supported on said shaft and a first free-wheeling clutch mechanism coupling said first drive pulley in a first rotational direction to said output shaft; an idler shaft parallel with said output shaft; a second unidirectional drive assembly mounted on said idler shaft comprising a second drive gear and a second drive pulley concentrically supported on said idler shaft in coplanar relation with said first drive gear and said first drive pulley respectively, said second drive gear having a driving connection with said first drive gear; a second free-wheeling clutch mechanism coupling said second drive pulley in said first rotational direction to said idler shaft, said first and second drive gears or said first and second drive pulleys or both being a different size whereby a dual speed unidirectional rotation of various ratios is obtained; a driven shaft parallel with said output and said idler shaft; pulley means coupled to said driven shaft; drive belt means connecting said first and second drive pulleys of said first and drive assemblies and said pulley means of said driven shaft.
Claim 5
Dependent Claim
52 words
A two-speed unidirectional drive system in accordance with claim 2 in which said pulley means is a single pulley attached to said driven shaft and said belt means comprises a single pulley belt having a common surface drivingly engaging said first and second drive pulley and said pulley on said driven shaft.
Claim 6
Dependent Claim
22 words
A two-speed unidirectional drive system in accordance with claim 2 in which said first and second drive pulleys are of different diameters.
Claim 7
Dependent Claim
22 words
A two-speed unidirectional drive system in accordance with claim 4 in which said first and second drive gears are of different pitch.
Claim 8
Dependent Claim
66 words
A two-speed unidirectional drive system in accordance with claim 2 in which said pulley means comprises a pair of driven pulleys, said driven pulleys being of different sizes, and said drive belt means comprises a first drive belt connecting said first drive pulley and one of said driven pulleys and a second drive belt connecting said second drive pulley and the other of said driven pulleys.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |