US3610756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the color of cut diamonds
Assignee: Individual
•
Filing: 1970-03-18
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Granted: 1971-10-05
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Expires: 1990-03-18
Abstract
Abstract The apparatus includes a well-known holder receiving a cut diamond for determining its color. The diamond is held by the holder below its holder or mounting edge leaving its upper portion with the planar surface and the facets fully exposed. A source of monochromatic light is provided above the holder adjustable with respect to the distance between the upper planar surface of the diamond and the source of light. A photoelectric receiver is arranged above the diamond receiving and measuring the ray entered through the upper planar surface and emerging from the facets of the diamond.
Inventors
- 👤 Godehard Lenzen
- 👤 Manfred Eickhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:22
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/389; G01N21/00; G01N21/84; G01N21/87
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
142 words
An apparatus for determining the color of cut diamonds of any type of cut including a holder for the diamond holding it below its mounting edge while its upper portion remains entirely exposed, characterized in that a source of monochromatic light is provided above said holder which is adjustable in distance relative to the upper planar surface of the diamond while at least one photoelectric receiver is arranged above said diamond, said apparatus including means for directing said monochromatic light to be incident on only said upper planar surface of said diamond so that rays of said light are reflected by the lower surfaces of the diamond and emerge from the upper facets of the diamond toward said photoelectric receiver which provides an indication of the color of the diamond as a function of the amount of light absorbed by the diamond.
Claim 2
Independent Claim
142 words
An apparatus for determining the color of cut diamonds of any type of cut including a holder for the diamond holding it below its mounting edge while its upper portion remains entirely exposed, characterized in that a source of monochromatic light is provided above said holder which is adjustable in distance relative to the upper planar surface of the diamond while at least one photoelectric receiver is arranged above said diamond, said apparatus including means for directing said monochromatic light to be incident on only said upper planar surface of said diamond so that rays of said light are reflected by the lower surfaces of the diamond and emerge from the upper facets of the diamond toward said photoelectric receiver which provides an indication of the color of the diamond as a function of the amount of light absorbed by the diamond.
Claim 3
Dependent Claim
18 words
An apparatus according to claim 1, wherein a light conducting element is used as said source of light.
Claim 4
Dependent Claim
16 words
An apparatus according to claim 2, wherein said light conducting element consists of a fibrous optic.
Claim 5
Dependent Claim
12 words
An apparatus according to claim 3, wherein said fibrous optic is flexible.
Claim 6
Dependent Claim
17 words
An apparatus according to claim 2, wherein said light conducting element consists of a light conducting rod.
Claim 7
Dependent Claim
16 words
An apparatus according to claim 5, wherein said light conducting rod is arranged within an encasement.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 2, wherein said photoelectric receiver has an aperture therethrough and snugly surrounds said light conducting element.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 1, wherein a photoresistance is used as said photoelectric receiver.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 1, wherein a photomultiplier is used as said photoelectric receiver.
Claim 11
Dependent Claim
16 words
An apparatus according to claim 9, wherein a secondary electron multiplier is used as said photomultiplier.
Claim 12
Dependent Claim
28 words
An apparatus according to claim 1, wherein a fine adjustment for the distance between said source of light and said upper planar surface of the diamond is provided.
Claim 13
Dependent Claim
59 words
An apparatus according to claim 1, characterized by the provision of an optical mirror for the emerging rays arranged upwardly with respect to said planar surface of the diamond and mounted by means allowing adjustment of its angular inclination, wherein said photoelectric receiver is disposed laterally of said mirror in a direction of the rays reflected by said mirror.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |