Patent US3851458A successfully refreshed from Google Patents.
US3851458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical alarm device for an alarm clock
Assignee: SCHWAB L
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Filing: 1973-10-02
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Granted: 1974-12-03
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Expires: 1993-10-02
Abstract
Abstract An alarm clock and alarm device electrically energized. The alarm is turned on by a driven hour gear that has a coupling projection that engages an alarm device gear that has a coupling recess for receiving the projection when the projection is in registry therewith at the time the alarm is to ring or buzz. The coupling takes place under control of a coupling element constructed as a resilient biasing element constantly biasing the driven gear toward the alarm gear and effecting the coupling when the registry obtains. This coupling element actuates a one-way clutch that is clutched and declutched as the gear coupling and uncoupling takes effect. The clutch couples a gear to a driven shaft, on which all the gears are mounted coaxially, for driving a gear sector that transports movable contacts programmed for opening and closing an electrical circuit during sequential spaced intervals of time so that an alarm in the circuit is sounded during sequential periods of time.
Inventors
- 👤 S Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:30
CPC Classifications
G; G04; G04C; G04C21/00; G04C21/16; G04C21/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
220 words
In an alarm clock, an electrical circuit having an electrically energized alarm, a driven spindle, an alarm first gear rotatable on said spindle and movable axially thereon, an alarm time-setting gear for presetting the time said alarm is to be energized and having a coupling recess on a side surface thereof, a driven gear rotatable on said spindle and having a coupling projection on a side surface thereof for engaging in said coupling recess of said alarm time-setting gear and coupling it to said driven gear when said coupling projection and coupling recess are in registry, resilient biasing means resiliently biasing the driven gear toward said alarm time-setting gear for coupling thereof when said preset time obtains and uncoupling thereof after the alarm has been energized, a one-way clutch having a clutch element fixed to said spindle and a second clutch element thereof on said first gear for driving said first gear when said biasing means couples said driven gear and said alarm time-setting gear, said biasing means having means for effecting clutching of said clutch and declutching thereof when said alarm time-setting gear and driven gear are coupled and uncoupled respectively, program means driven by said first gear when driven by said spindle controlling energizing of said circuit for sequential spaced intervals to energize said alarm during said intervals.
Claim 2
Dependent Claim
220 words
In an alarm clock, an electrical circuit having an electrically energized alarm, a driven spindle, an alarm first gear rotatable on said spindle and movable axially thereon, an alarm time-setting gear for presetting the time said alarm is to be energized and having a coupling recess on a side surface thereof, a driven gear rotatable on said spindle and having a coupling projection on a side surface thereof for engaging in said coupling recess of said alarm time-setting gear and coupling it to said driven gear when said coupling projection and coupling recess are in registry, resilient biasing means resiliently biasing the driven gear toward said alarm time-setting gear for coupling thereof when said preset time obtains and uncoupling thereof after the alarm has been energized, a one-way clutch having a clutch element fixed to said spindle and a second clutch element thereof on said first gear for driving said first gear when said biasing means couples said driven gear and said alarm time-setting gear, said biasing means having means for effecting clutching of said clutch and declutching thereof when said alarm time-setting gear and driven gear are coupled and uncoupled respectively, program means driven by said first gear when driven by said spindle controlling energizing of said circuit for sequential spaced intervals to energize said alarm during said intervals.
Claim 3
Dependent Claim
17 words
In an alarm clock according to claim 1, in which said driven gear comprises an hour gear.
Claim 4
Dependent Claim
44 words
In an alarm clock according to claim 1, in which said biasing means comprises a resilient element fixed stationary and bearing on said driven gear, said resilient element having said part for effecting clutching and declutching of said clutch coupled to said first gear.
Claim 5
Dependent Claim
35 words
In an alarm clock according to claim 1, in which said program means comprises a sector gear actuated by said alarm first gear, contacts transported by said sector gear for controlling energizing of said alarm.
Claim 6
Dependent Claim
26 words
In an alarm clock according to claim 4, in which said, program means includes means for manually actuating said sector angularly for turning off said alarm.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |