US4611166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation hazard detector
Assignee: Lockheed Martin Corp
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Filing: 1982-12-20
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Granted: 1986-09-09
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Expires: 2002-12-20
Abstract
Abstract An electromagnetic field detector adapted to display potential hazard to humans and other animals arising from illuminating electromagnetic energy over the frequency range determined to be hazardous by the American National Standards Institute; the detector being designed with various sensing means to create a sensitivity vs. frequency response that is the inverse of the A.N.S.I. protection guides.
Inventors
- 👤 Edward E. Aslan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:53
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/0864; G01R29/0878; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
A field detector for indicating energy content of an electromagnetic field in accordance with predetermined criteria which establishes the effect of said energy as a function of frequency throughout a range of frequencies, comprising diode sensing means operative over a first portion of said range and thermocouple sensing means operative over a second portion of said range, said sensing means being responsive to said field to produce outputs that are a function of the energy of said field, the outputs of said sensing means being added to produce a control output at a level proportional to said effect at the various frequencies present in said field, and means responsive to said control output to display the effect inherent in said range of frequencies.
Claim 2
Dependent Claim
123 words
A field detector for indicating energy content of an electromagnetic field in accordance with predetermined criteria which establishes the effect of said energy as a function of frequency throughout a range of frequencies, comprising diode sensing means operative over a first portion of said range and thermocouple sensing means operative over a second portion of said range, said sensing means being responsive to said field to produce outputs that are a function of the energy of said field, the outputs of said sensing means being added to produce a control output at a level proportional to said effect at the various frequencies present in said field, and means responsive to said control output to display the effect inherent in said range of frequencies.
Claim 3
Dependent Claim
18 words
A field detector as defined in claim 1, wherein said effect is the potential hazard of said energy.
Claim 4
Dependent Claim
35 words
A field detector as defined in claim 1, wherein said sensing means are mounted on a probe along a common axis, said diode and thermocouple sensing means being physically and electrically isolated from one another.
Claim 5
Dependent Claim
32 words
A field detector as defined in claim 3, wherein said sensing means comprise at least one set of sensing elements, the sensing elements of said set being mounted on a single probe.
Claim 6
Dependent Claim
46 words
A field detector as defined in claim 4, wherein the sensing elements within each set include a diode element connected to a dipole responsive to a lower portion of said range of frequencies, and a thermocouple responsive to a higher portion of said range of frequencies.
Claim 7
Dependent Claim
36 words
A field detector as defined in claim 4, including three sets of sensing elements, the sensing elements of each set being aligned along a common axis and the common axes of the sets being mutually orthogonal.
Claim 8
Dependent Claim
74 words
An electric field sensitive probe comprising a set of sensing elements including a diode sensing element and a thermocouple sensing element, said diode sensing element being connected to a dipole and circuitry to exhibit a predetermined sensitivity to said field over a lower range of frequency, and said thermocouple sensing element exhibiting predetermined sensitivity to said field over a higher range of frequency, said lower and higher ranges being substantially adjacent to one another.
Claim 9
Dependent Claim
74 words
An electric field sensitive probe comprising a set of sensing elements including a diode sensing element and a thermocouple sensing element, said diode sensing element being connected to a dipole and circuitry to exhibit a predetermined sensitivity to said field over a lower range of frequency, and said thermocouple sensing element exhibiting predetermined sensitivity to said field over a higher range of frequency, said lower and higher ranges being substantially adjacent to one another.
Claim 10
Dependent Claim
28 words
An electric field sensitive probe as defined in claim 7, wherein the sensing elements in said set are positioned along a common axis with spacing between adjacent ends.
Claim 11
Dependent Claim
26 words
An electric field sensitive probe as defined in claim 7, wherein said sets of sensing elements are each aligned along one of three mutually perpendicular axes.
Claim 12
Dependent Claim
51 words
An electric field sensitive probe as defined in claim 9, wherein said diode sensing element comprises a diode connected to a dipole antenna and capacitive means connected in parallel with said diode, said dipole having conductive portions connected to said diode and resistive portions remote from said connections with said diode.
Claim 13
Dependent Claim
22 words
An electric field sensitive probe as defined in claim 10, wherein said dipole includes discrete resistive segments interconnected along the length thereof.
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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) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |