Patent US4297547A successfully refreshed from Google Patents.
US4297547A
Expired / Lapsed
US
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Miniature timing mechanism
Assignee: Emerson Electric Co
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Filing: 1980-05-05
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Granted: 1981-10-27
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Expires: 2000-05-05
Abstract
Abstract A gear train is connected to a motor carried in a housing and has an output member extending into another housing, the output member having at least one cam lobe. Electrical switch means carried in the second housing are responsive to the cam lobe.
Inventors
- 👤 Benjamin F. Chestnut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:05
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A timing mechanism comprising: (a) a motor and a gear train connected to said motor to be driven thereby, (b) a first housing enclosing said gear train, (c) a cup shaped second housing carried by said first housing at an open end thereof, (d) an electrically insulative member closing said open end, (e) a bearing surface provided in said first housing and extending through an opening in said electrically insulative member, (f) a gear of said gear train carried within said first housing and having a unitarily constructed hub portion extending through said opening in said insulative member into said cup shaped member and at least one cam lobe unitarily constructed with said hub portion, (g) electrical switch means carried in said cup shaped member and responsive to said cam lobe, and (h) a circular cover carried by said cup shaped member and partially surrounding said cam lobe and in line with said opening and an outer surface of said bearing surface.
Claim 2
Dependent Claim
162 words
A timing mechanism comprising: (a) a motor and a gear train connected to said motor to be driven thereby, (b) a first housing enclosing said gear train, (c) a cup shaped second housing carried by said first housing at an open end thereof, (d) an electrically insulative member closing said open end, (e) a bearing surface provided in said first housing and extending through an opening in said electrically insulative member, (f) a gear of said gear train carried within said first housing and having a unitarily constructed hub portion extending through said opening in said insulative member into said cup shaped member and at least one cam lobe unitarily constructed with said hub portion, (g) electrical switch means carried in said cup shaped member and responsive to said cam lobe, and (h) a circular cover carried by said cup shaped member and partially surrounding said cam lobe and in line with said opening and an outer surface of said bearing surface.
Claim 3
Dependent Claim
45 words
A timing mechanism according to claim 1 wherein said electrical switch means includes a pair of switch blades, means carried by one of said switch blades engaging said cam lobe, and an electrical contact carried by each of said switch blades and engaging each other.
Claim 4
Dependent Claim
31 words
A timing mechanism according to claim 2 further comprising a stop means carried by said second housing and engaging the other of said pair of switch blades to limit its travel.
Claim 5
Dependent Claim
15 words
In a timing mechanism according to claim 3 wherein said stop means is a post.
References Cited (Backward Citations)
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |