US3884088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timer having two separate cam means and means advancing the cam means at different speeds
Assignee: Duracell Inc USA
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Filing: 1973-12-03
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Granted: 1975-05-20
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Expires: 1993-12-03
Abstract
Abstract In the driving of two separate cam means, a speed reduction in a ratio greater than the ratio of the number of two teeth in two gears of a gear train is provided through the cooperation of gears, one having at least one tooth, the remainder being smooth, the other having teeth one half tooth out of phase with each other.
Inventors
- 👤 Marcello Bertozzi
- 👤 Mario Chioffi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:11
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/46; D; D06; D06F; D06F34/00; D06F34/06; F; F16; F16H; F16H27/00; F16H27/04; F16H27/08; H; H01; H01H; H01H43/00; H01H43/10; H01H43/12; H01H43/125; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18528; Y10T74/19; Y10T74/1987; Y10T74/19874
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A timer comprising: a. motor drive means b. a first cam means c. a first speed reduction gear system coupling said first cam means to said motor drive means, d. a second cam means, and e. a second speed reduction gear system coupling said second cam means to said first cam means, f. each of said speed reduction gear systems including means providing a speed reduction greater than the ratio of the number of teeth of two gears of said gear systems.
Claim 2
Dependent Claim
82 words
A timer comprising: a. motor drive means b. a first cam means c. a first speed reduction gear system coupling said first cam means to said motor drive means, d. a second cam means, and e. a second speed reduction gear system coupling said second cam means to said first cam means, f. each of said speed reduction gear systems including means providing a speed reduction greater than the ratio of the number of teeth of two gears of said gear systems.
Claim 3
Dependent Claim
74 words
A timer according to claim 1 wherein one of said means providing a greater speed reduction comprises a pinion having a cogged sector and a smooth sector, a gear having teeth a portion of which are incised at intervals through about half their height, said pinion and gear cooperating such that said smooth sector engages said teeth to prevent said gears rotation, and said cogged section engaging said gear to provide for its rotation.
Claim 4
Dependent Claim
23 words
A timer according to claim 2 wherein said means providing a greater speed reduction is included in said first speed reduction gear system.
Claim 5
Dependent Claim
127 words
A timer according to claim 1 wherein one of said means providing a greater speed reduction comprises a disc having a smooth periphery a recess in said periphery and at least one tooth extending therefrom; a double rowel gear in which the teeth thereof are one half tooth out of phase with respect to each other, said disc and said double rowel gear cooperating such that upon rotation of said disc one of said rowel gears engages said smooth periphery, and said tooth engages the other rowel gear, further rotation of said disc causing said tooth to engage the other of said rowel gears while the first named rowel gear engages said recess; and a cog-wheel coupled between said double rowel gear and said second cam means.
Claim 6
Dependent Claim
23 words
A timer according to claim 4 wherein said means providing a greater speed reduction is included in said second speed reduction gear system.
Claim 7
Dependent Claim
20 words
A timer according to claim 1 wherein said first and second cam means are rotatably carried on a single shaft.
References Cited (Backward Citations)
US3443442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |