Patent ID: 6868631

Claim:
A night vision device to mark the location of a front sight comprising: a casing; a power source; and a light emission device adapted to the front sight, wherein; the casing includes a tube and a switch set, the tube containing the power source, which is connected to the light emission device, the switch set controls power flow to the light emission device in order to mark, by the light emitted from the light emission device, the location of the front sight during night hours or when visual contact is conditions are poor; wherein said switch set includes a first switch and a second switch, both ends of said tube being respectively provided with external threads, threads being further provided on said first switch and said second switch for respective engagement with said external threads of said tube, said tube further having a hole formed therethrough at a central portion thereof, said power source having a first electrode and a second electrode and said light emission device having a first electrode pin and a second electrode pin, whereby said light emission device is inserted into said tube through said hole with said first and second electrode pins being received within said tube, said power source being received within said tube of said casing and said first switch threadedly engaging one end of said tube, said second electrode of said power source contacting said first electrode pin of said light emission device and said first electrode of said power source contacting said first switch, said second switch threadedly engaging the other end of said tube; whereby, said second switch being selectively tightened by a user in order to contact said second electrode pin of said light emission device and said first electrode of said power source being released from contact with said first switch when said first switch is selectively loosened, or said second switch being released from contact with said second electrode pin when said second switch is selectively loosened; an elastic member being further provided with a sleeve member for fixed securement with said second switch, said elastic member and said sleeve contacting said second electrode pin of said light emission device when said second switch is selectively tightened.