US3747331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clock with temperature alarm mechanism
Assignee: Individual
•
Filing: 1971-11-17
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Granted: 1973-07-24
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Expires: 1991-11-17
Abstract
Abstract An otherwise conventional electric clock driven by a synchronous motor having an alarm vibrator mounted for vibration in the magnetic field of the motor and normally restrained against vibration by a bi-metal, temperature responsive element which, upon a predetermined increase in ambient temperature, pulls away from the vibrator and allows the alarm to sound.
Inventors
- 👤 E Nyberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
G; G04; G04B; G04B47/00; G04C; G04C21/00; G04C21/16; G04C21/18; G08; G08B; G08B17/00; G08B17/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
In a clock having a case enclosing a frame and a synchronous electric motor driving time iu:icating devices, a temperature alarm contained in said case comprising, in combination, a spring steel alarm vibrator anchored on said frame so as to extend, when released, into the magnetic field of said motor, and a temperature responsive bi-metal element being operatively Ushaped with one arm anchored on said frame and the other arm positioned to engage and hold said vibrator away from said motor at normal ambient temperatures, said element moving away from said vibrator upon increasing ambient temperatures so that the vibrator sounds an audible alarm at a predetermined ambient temperature.
Claim 2
Dependent Claim
109 words
In a clock having a case enclosing a frame and a synchronous electric motor driving time iu:icating devices, a temperature alarm contained in said case comprising, in combination, a spring steel alarm vibrator anchored on said frame so as to extend, when released, into the magnetic field of said motor, and a temperature responsive bi-metal element being operatively Ushaped with one arm anchored on said frame and the other arm positioned to engage and hold said vibrator away from said motor at normal ambient temperatures, said element moving away from said vibrator upon increasing ambient temperatures so that the vibrator sounds an audible alarm at a predetermined ambient temperature.
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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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |