Title:
METHOD AND APPARATUS FOR ASSESSING THE INTEGRITY OF A JEWELLERY SETTING
Document Type and Number:
WIPO Patent Application WO2003089913
Kind Code:
A3
Abstract:
There is provided a method for assessing the integrity of grip of a stone in an jewellery setting having plural gripping claws to grip said stone, the method comprising heating the stone; measuring conductive transfer of heat from the stone to each of said plural gripping claws; and comparing said conductive heat transfer to said each gripping claw, wherein a marked difference in conductive heat transfer to any of the gripping claws indicates a lack of integrity of grip. Suitable apparatus is also provided.
Inventors:
HUMBERT JOHN JR (US)
ROBERTSON MARK (US)
ROBERTSON MARK (US)
Application Number:
PCT/EP2003/003989
Publication Date:
February 05, 2004
Filing Date:
April 16, 2003
Export Citation:
Assignee:
JEWELRY SECURITY LLC (US)
HUMBERT JOHN JR (US)
ROBERTSON MARK (US)
HUMBERT JOHN JR (US)
ROBERTSON MARK (US)
International Classes:
G01N25/72; A44C17/02; G01N33/38; G01N25/18; (IPC1-7): G01N33/38; G01N25/18
Foreign References:
| DE3425561A1 | 1985-01-31 | |||
| US4488821A | 1984-12-18 | |||
| US4344315A | 1982-08-17 | |||
| DE20107569U1 | 2001-11-15 | |||
| US20020034211A1 | 2002-03-21 | |||
| US4841543A | 1989-06-20 | |||
| FR2389128A1 | 1978-11-24 | |||
| DE3835895A1 | 1989-07-06 |
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