US3944368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for color analysis of precious stones
Assignee: Individual
•
Filing: 1973-07-11
•
Granted: 1976-03-16
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Expires: 1993-07-11
Abstract
Abstract A light device for analyzing precious stone body color, comprising a diffused light source in conjunction with indirectly reflected light. Also, method of analyzing precious stones for body color.
Inventors
- 👤 Casper R. Beesley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:42
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/87; G01B; G01B11/00; G01B11/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
162 words
An apparatus for examining a precious stone, comprising: a. an envelope structure defining an interior space viewable from without said envelope; b. a light source disposed at said interior space; c. a white transparent light diffusing means disposed within said interior space; d. means for locating said precious stone within said interior space adjacent to said light diffusing means such that said stone is in light receiving relationship with said light diffusing means, and said light diffusing means being disposed between said precious stone and said light source, said stone being viewable from a point outside said interior space; and e. means for reflecting light from said light source, and reflecting means being disposed such that said stone is located between said reflecting means and said viewing point, and being arranged so that at least a portion of the light being reflected by said reflecting means passes from said light source to said viewing point without passing through said light diffusing means.
Claim 2
Independent Claim
162 words
An apparatus for examining a precious stone, comprising: a. an envelope structure defining an interior space viewable from without said envelope; b. a light source disposed at said interior space; c. a white transparent light diffusing means disposed within said interior space; d. means for locating said precious stone within said interior space adjacent to said light diffusing means such that said stone is in light receiving relationship with said light diffusing means, and said light diffusing means being disposed between said precious stone and said light source, said stone being viewable from a point outside said interior space; and e. means for reflecting light from said light source, and reflecting means being disposed such that said stone is located between said reflecting means and said viewing point, and being arranged so that at least a portion of the light being reflected by said reflecting means passes from said light source to said viewing point without passing through said light diffusing means.
Claim 3
Dependent Claim
16 words
An apparatus as defined in claim 1, wherein said light diffusing means comprises a translucent element.
Claim 4
Dependent Claim
16 words
An apparatus as defined in claim 2, wherein said light diffusing means is a glass plate.
Claim 5
Dependent Claim
19 words
An apparatus as defined in claim 1, wherein said light reflecting means comprises a wall portion of said envelope.
Claim 6
Dependent Claim
17 words
An apparatus as defined in claim 1, wherein said light reflecting means comprises a discrete structural element.
Claim 7
Dependent Claim
15 words
An apparatus as defined in claim 1, wherein said envelope comprises a light opaque structure.
Claim 8
Dependent Claim
17 words
An apparatus as defined in claim 1, further comprising an ultraviolet light source for illuminating said stone.
Claim 9
Dependent Claim
18 words
An apparatus as defined in claim 1, further comprising a light filter disposed between said light reflecting means.
Claim 10
Dependent Claim
28 words
An apparatus as defined in claim 1, wherein said light diffusing means comprises a translucent plate extending only to a point spaced apart from said light reflecting means.
Claim 11
Dependent Claim
27 words
An apparatus as defined in claim 1, wherein said light source is connected to a variable power source, so that the light intensity thereof can be varied.
Claim 12
Dependent Claim
20 words
An apparatus as defined in claim 1, wherein said light diffusing means serves as a support for said precious stone.
Claim 13
Dependent Claim
15 words
An apparatus as defined in claim 1 wherein said light source is an incandescent lamp.
References Cited (Backward Citations)
US1744485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |