Precious stone testing apparatus

Abstract

A precious stone testing apparatus includes a hand held casing receiving a microprocessor therein, a testing head, and an indicating arrangement provided at the hand held casing and electrically linked with the microprocessor. The testing head includes a testing probe for contacting a tested object, a UV light source for UV light generation, and a thermal conduction unit electrically linked to the microprocessor for determining a thermal conductivity of the tested object through the testing probe, wherein the thermal conduction unit and the UV light source are independently operated for evaluating the tested object, The indicating arrangement includes a plurality of indicating lights to be activated in responsive to the corresponding thermal conductivity of the tested object so as to classify the tested object.

What is claimed is: 
     
         1 . A precious stone testing apparatus, comprising:
 a hand held casing receiving a microprocessor therein;   a testing head, which is provided at a front end of said hand held casing, comprising a testing probe for contacting a tested object, a UV light source positioned adjacent to said testing probe for UV light generation, and a thermal conduction unit electrically linked to said microprocessor for determining a thermal conductivity of said tested object through said testing probe, wherein said thermal conduction unit and said UV light source are independently operated for evaluating said tested object.   
     
     
         2 . The precious stone testing apparatus, as recited in  claim 1 , further comprising an indicating arrangement provided at said hand held casing and electrically linked with said microprocessor, wherein said indicating arrangement comprises a plurality of indicating lights to be activated in responsive to said corresponding thermal conductivity of said tested object so as to classify said tested object. 
     
     
         3 . The precious stone testing apparatus, as recited in  claim 2 , wherein said indicating lights comprise moissanite indicating light, diamond indicating light, and metal indicating light which are electrically linked to said microprocessor for indicating said tested object as moissanite, diamond, and metal respectively. 
     
     
         4 . The precious stone testing apparatus, as recited in  claim 3 , wherein said indicating lights further comprise status indicating light and testing indicating light which are electrically linked to said microprocessor for indicating a status of said microprocessor and testing operation of said microprocessor respectively. 
     
     
         5 . The precious stone testing apparatus, as recited in  claim 4 , wherein said indicating arrangement further comprises a buzzer provided at said hand held casing and electrically linked with said microprocessor for generating sound effect during testing operation. 
     
     
         6 . The precious stone testing apparatus, as recited in  claim 1 , wherein said testing head further comprises a LED control circuit and a plurality of LEDs electrically coupled at said LED control circuit for generating a light effect corresponding to said indicating lights. 
     
     
         7 . The precious stone testing apparatus, as recited in  claim 3 , wherein said testing head further comprises a LED control circuit and a plurality of LEDs electrically coupled at said LED control circuit for generating a light effect corresponding to said indicating lights. 
     
     
         8 . The precious stone testing apparatus, as recited in  claim 5 , wherein said testing head further comprises a LED control circuit and a plurality of LEDs electrically coupled at said LED control circuit for generating a light effect corresponding to said indicating lights. 
     
     
         9 . The precious stone testing apparatus, as recited in  claim 1 , wherein said testing head further comprises a probe outer casing extended from said front end of said hand held casing and a probe retaining casing extended from said probe outer casing to retain said testing probe in position, wherein said probe retaining casing, having a conical shape, has two through slots spacedly formed at a vertex portion thereof and arranged in such a manner that a portion of said testing probe is exposed out of said probe retaining casing through one of said through slots to form a contact probe of said thermal conduction unit, wherein a light head of said UV light source is alignedly extended out of another said through slot for generating UV light therethrough. 
     
     
         10 . The precious stone testing apparatus, as recited in  claim 5 , wherein said testing head further comprises a probe outer casing extended from said front end of said hand held casing and a probe retaining casing extended from said probe outer casing to retain said testing probe in position, wherein said probe retaining casing, having a conical shape, has two through slots spacedly formed at a vertex portion thereof and arranged in such a manner that a portion of said testing probe is exposed out of said probe retaining casing through one of said through slots to form a contact probe of said thermal conduction unit, wherein a light head of said UV light source is alignedly extended out of another said through slot for generating UV light therethrough. 
     
     
         11 . The precious stone testing apparatus, as recited in  claim 8 , wherein said testing head further comprises a probe outer casing extended from said front end of said hand held casing and a probe retaining casing extended from said probe outer casing to retain said testing probe in position, wherein said probe retaining casing, having a conical shape, has two through slots spacedly formed at a vertex portion thereof and arranged in such a manner that a portion of said testing probe is exposed out of said probe retaining casing through one of said through slots to form a contact probe of said thermal conduction unit, wherein a light head of said UV light source is alignedly extended out of another said through slot for generating UV light therethrough. 
     
     
         12 . The precious stone testing apparatus, as recited in  claim 11 , wherein said testing head further comprises an indicating element, which is made of transparent material and is formed in ring shape, coupled between said probe outer casing and said probe retaining casing at a position that said LEDs are encircled within said indicating element, such that when said LEDs are activated for generating light effect, said indicating element is lightened up by said LEDs. 
     
     
         13 . The precious stone testing apparatus, as recited in  claim 1 , further comprises a touch activation unit for activating said microprocessor to operate said thermal conductive unit, wherein said touch activation unit comprises a first touch control and a second touch control provided at two opposite sides of said hand held casing at a position close to said testing head and electrically linked to the microprocessor in order to activate said microprocessor by means of user's fingers contact. 
     
     
         14 . The precious stone testing apparatus, as recited in  claim 8 , further comprises a touch activation unit for activating said microprocessor to operate said thermal conductive unit, wherein said touch activation unit comprises a first touch control and a second touch control provided at two opposite sides of said hand held casing at a position close to said testing head and electrically linked to the microprocessor in order to activate said microprocessor by means of user's fingers contact. 
     
     
         15 . The precious stone testing apparatus, as recited in  claim 12 , further comprises a touch activation unit for activating said microprocessor to operate said thermal conductive unit, wherein said touch activation unit comprises a first touch control and a second touch control provided at two opposite sides of said hand held casing at a position close to said testing head and electrically linked to the microprocessor in order to activate said microprocessor by means of user's fingers contact. 
     
     
         16 . The precious stone testing apparatus, as recited in  claim 13 , further comprising a UV light switch provided at said hand held casing to electrically link said UV light source to control said UV light source such that said thermal conduction unit and said UV light source are independently operated. 
     
     
         17 . The precious stone testing apparatus, as recited in  claim 14 , further comprising a UV light switch provided at said hand held casing to electrically link said UV light source to control said UV light source such that said thermal conduction unit and said UV light source are independently operated. 
     
     
         18 . The precious stone testing apparatus, as recited in  claim 15 , further comprising a UV light switch provided at said hand held casing to electrically link said UV light source to control said UV light source such that said thermal conduction unit and said UV light source are independently operated. 
     
     
         19 . The precious stone testing apparatus, as recited in  claim 1 , further comprising a battery compartment provided in said hand held casing for receiving a battery therein and an external power terminal provided at an outer surface of said hand held casing for electrically connecting with an external power supply. 
     
     
         20 . The precious stone testing apparatus, as recited in  claim 18 , further comprising a battery compartment provided in said hand held casing for receiving a battery therein and an external power terminal provided at an outer surface of said hand held casing for electrically connecting with an external power supply.