US4019052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic x-ray device
Assignee: US Philips Corp
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Filing: 1975-10-30
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Granted: 1977-04-19
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Expires: 1995-10-30
Abstract
Abstract An electrophotographic diffractometer apparatus, comprising a photoconductive storage member, means for uniformly charging said storage member, means for holding a diffraction specimen, means for directing a collimated beam of electromagnetic radiation to said specimen, whereby diffracted rays of said beam are directed to said charge storage member and produce discharged local areas thereon in accordance with the diffraction characteristics of said specimen, and scanning means for electrically measuring the charge pattern at said storage member.
Inventors
- 👤 David J. Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/20; G01N23/207
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
An electrophotographic diffractometer apparatus comprising a. a photoconductive storage member; b. means for uniformly charging said storage member; c. means for holding a diffraction specimen; d. means for directing a collimated beam of electromagnetic radiation to said specimen, whereby diffracted rays of said beam are directed to said charge storage member and produce discharged local areas thereon in accordance with the diffraction characteristics of said specimen; and e. scanning means for electrically measuring the charge pattern at said storage member, said scanning means comprising said charging means and said measuring means.
Claim 2
Dependent Claim
91 words
An electrophotographic diffractometer apparatus comprising a. a photoconductive storage member; b. means for uniformly charging said storage member; c. means for holding a diffraction specimen; d. means for directing a collimated beam of electromagnetic radiation to said specimen, whereby diffracted rays of said beam are directed to said charge storage member and produce discharged local areas thereon in accordance with the diffraction characteristics of said specimen; and e. scanning means for electrically measuring the charge pattern at said storage member, said scanning means comprising said charging means and said measuring means.
Claim 3
Dependent Claim
16 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said measuring means comprises a scanning device.
Claim 4
Dependent Claim
19 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said scanning means is rotatable about said specimen holding means.
Claim 5
Dependent Claim
18 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said measuring means comprising at least one electrostatic voltmeter.
Claim 6
Dependent Claim
17 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said charging means comprises a corona discharge device.
Claim 7
Dependent Claim
24 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said scanning means comprises means for providing an analog signal read-out of said charge pattern.
Claim 8
Dependent Claim
23 words
An electrophotographic diffraction apparatus as in claim 6, further comprising means for converting said analog signal to digital data and information processing means.
Claim 9
Dependent Claim
18 words
An electrophotographic diffractometer apparatus as in claim 7, further comprising automatic information feedback means to said sensing means.
Claim 10
Dependent Claim
46 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said apparatus comprises a side wall defining a space, said specimen being disposed in said space, and said storage member comprises a layer disposed at the interior face of said side wall and substantially surrounding said specimen.
Claim 11
Dependent Claim
22 words
An electrophotographic diffractometer apparatus as in claim 1, comprising means for rotating said specimen while it is exposed to said radiation beam.
Claim 12
Dependent Claim
15 words
An electrophotographic diffractometer apparatus as in claim 1, wherein said storage member is substantially flat.
Claim 13
Dependent Claim
26 words
An electrophotographic diffractometer apparatus as in claim 11, wherein said specimen is disposed at one side of and on an axis perpendicular to said storage member.
Claim 14
Dependent Claim
50 words
An electrophotographic diffractometer apparatus as in claim 12, wherein said radiation a collimated x-ray beam and said apparatus comprises a source of said x-ray beam disposed at the other side of said storage member, said storage member comprising a passageway through which said x-ray beam is directed toward said specimen.
References Cited (Backward Citations)
US2666144A
Cited
US3792269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |