| 主权项 |
1. A multi-functional precious stone testing apparatus for hand holding by a user and identifying a test object as one of diamond, moissanite, metal, and other stone, wherein said multi-functional precious stone testing apparatus comprises:
a power source unit; a portable housing which comprises a hand-held casing having a top wall, a bottom wall and two sidewalls to define an interior cavity for receiving said power source unit therein, and a probe casing, having a conical shape, coaxially extended from a front end of said hand-held casing; a testing unit comprising: an evaluation circuit received in said interior cavity of said hand-held casing and electrically linked with said power source unit, a conduction unit operatively linked to said evaluation circuit, wherein said conductive unit comprises a conduction circuit received in said interior cavity of said hand-held casing and electrically linked to said evaluation circuit and a conductive probe, which is supported by said probe casing and operatively linked to said conduction circuit, having a testing end portion extended out of a tip end of said probe casing for contacting the testing object for determining a thermal conductivity or an electrical conductivity of the testing object and sending a testing signal to said evaluation circuit to analysis said testing signal in responsive to said conductivity of the testing object in order to identify the testing object as diamond by said thermal conductivity and as moissanite by said electrical conductivity, and a switch control operatively linked to an activation selection circuit to selectively control said conduction unit, wherein when said switch control is actuated, said conduction unit is activated through said activation selection circuit for determining said thermal conductivity or electrical conductivity of the testing object while said conductive probe contacting with the testing object, wherein said switch control comprises two touch controls which are provided at said sidewalls of said hand-held casing respectively in such a manner that said touch controls are activated by a touch of the user in such a manner that when an index finger and a thumb of the user contact at said touch controls respectively while the user holding said hand-held casing, said conduction unit is activated through said activation selection circuit, and that when one of said touch controls is untouched by the user, said activation selection circuit automatically deactivates said conduction unit; and an indication unit which comprises: a LED light unit received in said hand-held casing and operatively linked to said evaluation circuit for generating a light indicating effect to illuminate said testing end portion of said conductive probe during testing and identifying the testing object in responsive to said conductivity of the testing object, wherein said LED light unit comprises one or more of LEDs supported in said hand-held casing at a position close to said front end of said hand-held casing for generating light effects when said evaluation circuit is activated, and a light transmissible frame provided between said hand-held casing and said probe casing, wherein when said evaluation circuit is activated, said LEDs generate an illumination light to light up said light transmissible frame for illumination of said testing end portion of said conductive probe in such a manner that when said conductive probe is in contact with the testing object to activate said evaluation circuit, said light transmissible frame is lightened up by said LEDs in responsive to the contact between said conductive probe and the testing object, wherein when said evaluation circuit is activated, said illumination light of said LEDs light up said light transmissible frame as an indicator for ensuring said testing end portion of said conductive probe being in contact with the testing object and as an illuminator for illuminating at said testing end portion of said conductive probe to be contacted with the testing object, wherein a distance is defined between said light transmissible frame and said tip end of said probe casing so as to prevent heat generated from said LED light unit and said illuminating light from being transmitted toward said conductive probe to affect an accurate measurement for said thermal conductivity or electrical conductivity of the testing object. |
