US4484186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earthquake indicator
Assignee: Individual
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Filing: 1981-11-20
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Granted: 1984-11-20
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Expires: 2001-11-20
Abstract
Abstract A novelty for apparently indicating earthquakes, including a circular base marked with concentric circles on its upper side defining different earthquake intensities, a frame upon the base supporting a freely depending electrical contact through a supported circular contact so that in case the device is tilted, the contacts touch and thus close a circuit to a warning alarm.
Inventors
- 👤 Lawrence R. Wood
- 👤 George Spector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:08
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/30; A63H37/00; G; G01; G01V; G01V1/00; G01V1/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
An earthquake indicator, comprising in combination, a circular base, an inverted U-shaped frame affixed on said base, a circular ring supported by strips underneath said frame, and a depending rod from said frame, passing through said ring, said rod and ring comprising contacts of a switch in a warning electric circuit, a plurality of circles marked upon said base defining earthquake intensities, and means to adjust said indicator.
Claim 2
Dependent Claim
68 words
An earthquake indicator, comprising in combination, a circular base, an inverted U-shaped frame affixed on said base, a circular ring supported by strips underneath said frame, and a depending rod from said frame, passing through said ring, said rod and ring comprising contacts of a switch in a warning electric circuit, a plurality of circles marked upon said base defining earthquake intensities, and means to adjust said indicator.
Claim 3
Dependent Claim
20 words
The combination as set forth in claim 1 wherein said means comprises said ring being pivotaly mounted on said strips.
Claim 4
Dependent Claim
19 words
The combination of claim 2 wherein said means further includes a base which is pivotaly mounted on said frame.
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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |