US4301406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave warning device
Assignee: Individual
•
Filing: 1979-04-23
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Granted: 1981-11-17
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Expires: 1999-04-23
Abstract
Abstract A device for warning a person carrying or wearing it of the presence of dangerous microwave radiation is fully powered by the radiations being detected. A very low-wattage gas-discharge lamp is energized by a broadly or a sharply tuned receiver circuit including dipole antennas or one antenna and a "grounding" casing element. The casing may be largely and uniformly transparent or have different areas gradedly light-transmissive to indicate varying radiation intensities. The casing can be made in the shape of a pocket watch, fountain pen, bracelet or finger ring, etc.
Inventors
- 👤 Walter Shriner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:47
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R29/00; G01R29/08; G01R29/0807; G01R29/0814; G01R29/0857
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
A device for warning a person of the momentary presence of a dangerous intensity of microwave radiation, comprising: an at-least-partly-translucent housing member of the size and shape of a pocket watch, a low-wattage gaseous-discharge light-emitting element in said housing member, antenna means carried by said housing member and operatively coupled to said light-emitting element to cause it to variably glow responsively to dangerously intense radiations detected by said device, said antenna means comprising a pair of wires constituting a dipole and connected to opposite terminals of said light-emitting element, at least one of said dipole wires having induction-coil-forming tuning convolutions in its end adjacent said light-emitting element, a pair of short flexible insulation-covered wires helically intertwined and with one end of each connected to a different terminal of said light-emitting element to constitute a variable capacitor bridging said light-emitting element, and means exterior to said casing for twisting said intertwined wires to vary the capacitance of said capacitor.
Claim 2
Independent Claim
158 words
A device for warning a person of the momentary presence of a dangerous intensity of microwave radiation, comprising: an at-least-partly-translucent housing member of the size and shape of a pocket watch, a low-wattage gaseous-discharge light-emitting element in said housing member, antenna means carried by said housing member and operatively coupled to said light-emitting element to cause it to variably glow responsively to dangerously intense radiations detected by said device, said antenna means comprising a pair of wires constituting a dipole and connected to opposite terminals of said light-emitting element, at least one of said dipole wires having induction-coil-forming tuning convolutions in its end adjacent said light-emitting element, a pair of short flexible insulation-covered wires helically intertwined and with one end of each connected to a different terminal of said light-emitting element to constitute a variable capacitor bridging said light-emitting element, and means exterior to said casing for twisting said intertwined wires to vary the capacitance of said capacitor.
Claim 3
Dependent Claim
24 words
A warning device according to claim 1 wherein said housing member has translucent areas of differing translucence to further indicate different intensities of radiation.
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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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |