US3853015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control devices for slow and fast advancements for electromechanical timers
Assignee: Emerson Electric Co
•
Filing: 1973-12-03
•
Granted: 1974-12-10
•
Expires: 1993-12-03
Abstract
Abstract Two one-way clutches provide for rapid advancement of a cam stack and independent manual rotation of the cam stack.
Inventors
- 👤 M Bertozzi
- 👤 M Chioffi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:26
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/12; H01H43/125; F; F16; F16H; F16H27/00; F16H27/04; F16H27/08; F16H37/00; F16H2700/00; F16H2700/02; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1503; Y10T74/19; Y10T74/19014; Y10T74/1987; Y10T74/19879; Y10T74/21; Y10T74/2101; Y10T74/2102; Y10T74/2106
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A timing mechanism comprising a housing, a first shaft journaled for rotation in said housing, a first electric motor connected to said housing, a first cam means carried by said first shaft and rotatable by said first electric motor, a second electric motor connected to said housing and coupled for rotation of said first cam means at a faster rate than by said first motor through a first one-way clutch means, a second shaft carried by said housing, a second cam means rotatably carried on said second shaft and rotatable by said first electric motor at a faster rate than said first cam means, and a second one-way clutch means coupled between said first electric motor and said first cam means, whereby said first cam means may be rotated in one direction by manually turning said first shaft and allowing said second one-way clutch means to break coupling of said first cam means with said first and second motors.
Claim 2
Dependent Claim
159 words
A timing mechanism comprising a housing, a first shaft journaled for rotation in said housing, a first electric motor connected to said housing, a first cam means carried by said first shaft and rotatable by said first electric motor, a second electric motor connected to said housing and coupled for rotation of said first cam means at a faster rate than by said first motor through a first one-way clutch means, a second shaft carried by said housing, a second cam means rotatably carried on said second shaft and rotatable by said first electric motor at a faster rate than said first cam means, and a second one-way clutch means coupled between said first electric motor and said first cam means, whereby said first cam means may be rotated in one direction by manually turning said first shaft and allowing said second one-way clutch means to break coupling of said first cam means with said first and second motors.
Claim 3
Dependent Claim
30 words
A timing mechanism according to claim 1 further including means coupled between said first motor and said first cam means, imparting step by step advancement of said first cam means.
Claim 4
Dependent Claim
86 words
A timing mechanism according to claim 2 wherein said means imparting step by step advancement comprises: a. a constant speed driver comprising a gear having a single tooth; b. a driven member, having a plurality of uniformly-spaced teeth extending from an outer periphery thereof and engaged by said tooth of said constant speed driver periodically as said tooth rotates past said teeth on said driven member; and c. a spring biased detent pawl engaging said driven member to positively locate said teeth on said driven member.
Claim 5
Dependent Claim
29 words
A timing mechanism according to claim 1 wherein said first and second shafts are axially alligned and coupled together such that said first shaft rotates within said second shaft.
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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) | 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 |