Patent US2472655A successfully refreshed from Google Patents.
Patent US4301406A successfully refreshed from Google Patents.
US4301406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave warning device
Assignee: Individual
•
Filing: 1979-04-23
•
Granted: 1981-11-17
•
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 14:01
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.
References Cited (Backward Citations)
US1867944A
Cited
US1886489A
Cited
US2614149A
Cited
US3037165A
Cited
US3423679A
Cited
US3852755A
Cited
US4032910A
Cited
US3983717A
Cited
US4177422A
Cited
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 |