Patent US5396765A successfully refreshed from Google Patents.
US3740142A
Expired / Lapsed
US
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Apparatus for discriminating and/or identifying jewels
Assignee: FUMIO SURUKI
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Filing: 1970-06-16
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Granted: 1973-06-19
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Expires: 1990-06-16
Abstract
Abstract A novel method for testing materials such as jewels having optical properties such as transparency, reflection, and refraction, in commercial basis, and an apparatus for practicing the method are proposed. The apparatus comprises an enclosure forming a dark room in which the material such as a jewel is tested, means for holding and positioning the material at a selected position inside of the dark room, a beam of electromagnetic radiation such as light is directed onto the material preferably from the culet side of the material, and a photographic material, preferably placed on the crown side thereof, for recording an image of the electromagnetic radiation distribution of the beam passed through on the material.
Inventors
- 👤 Y Takubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:38
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/87; G01N33/00; G01N33/389; G03; G03B; G03B15/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
An apparatus for discriminating and identifying materials having optical properties, which comprises: a light-proof enclosure having side walls and a bottom portion and having located therein, holding means for holding and positioning the material, said holding means including a transparent plate supported by the side walls of the lightproof enclosure: a light source, a beam of which is directed onto the material to be tested; holding means for holding a photographic material along the side walls of the light-proof enclosure; and a photographic material for recording an image of the spectral light distribution of the beam passed through the material, held in place along the walls of the light-proof enclosure by said holding means and disposed along the bottom of the light-proof enclosure.
Claim 2
Independent Claim
123 words
An apparatus for discriminating and identifying materials having optical properties, which comprises: a light-proof enclosure having side walls and a bottom portion and having located therein, holding means for holding and positioning the material, said holding means including a transparent plate supported by the side walls of the lightproof enclosure: a light source, a beam of which is directed onto the material to be tested; holding means for holding a photographic material along the side walls of the light-proof enclosure; and a photographic material for recording an image of the spectral light distribution of the beam passed through the material, held in place along the walls of the light-proof enclosure by said holding means and disposed along the bottom of the light-proof enclosure.
Claim 3
Dependent Claim
22 words
An apparatus according to claim 1 wherein the photographic material is placed near the holding means for holding and positioning the material.
Claim 4
Dependent Claim
39 words
An apparatus according to claim 1 wherein said holding means for holding and positioning the material to be tested is adjustably positioned within said enclosure to permit adjustment in distance between said material and the photographic material for recording.
Claim 5
Dependent Claim
30 words
An apparatus according to claim 3 and further including control means positioned outside said enclosure and connected to said holding means for adjusting said holding means from outside said enclosure.
Claim 6
Dependent Claim
49 words
An apparatus according to claim 3 wherein a shining time of the light source can be adjusted from the outside of the enclosure, said shining time being instantaneously a time of exposure to record a specific character of the spectral light passed through the jewel on a photographic material.
Claim 7
Dependent Claim
21 words
An apparatus according to claim 5 wherein the intensity of the light source can be varied from outside of the enclosure.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |