US4632052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tornado early warning device
Assignee: Individual
•
Filing: 1985-07-12
•
Granted: 1986-12-30
•
Expires: 2005-07-12
Abstract
Abstract A tornado warning device which emits a warning sound when air escapes the said device at a pre-determined rate, with said rate being that of the loss of air pressure in the path of a tornado.
Inventors
- 👤 Marion Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:36
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/08; G01L19/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A mechanical alarm warning system responsive to a sudden drop in ambient pressure as experienced at the approach of a tornado comprising; an otherwise sealed container of air exposed to ambient pressure with an orifice, a biased plunger for obstructing said orifice and for allowing a rate of escape of air through said orifice when a drop in said ambient pressure occurs, and an alarm means for generating a sound by the escape of air from said container when said rate of escape of air exceeds a critical level as when said drop in ambient pressure overcomes said biased plunger means to tend to open said orifice.
Claim 2
Dependent Claim
107 words
A mechanical alarm warning system responsive to a sudden drop in ambient pressure as experienced at the approach of a tornado comprising; an otherwise sealed container of air exposed to ambient pressure with an orifice, a biased plunger for obstructing said orifice and for allowing a rate of escape of air through said orifice when a drop in said ambient pressure occurs, and an alarm means for generating a sound by the escape of air from said container when said rate of escape of air exceeds a critical level as when said drop in ambient pressure overcomes said biased plunger means to tend to open said orifice.
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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |