Patent ID: 7887212

Claim:
A lamp pen comprising; a lower body having a transparent distal end and a conductive proximal end; an upper body having a first end attachable to the lower body proximal end and a second end defining a button aperture; a refill disposed in the lower body, the refill having a writing end and a conductive tail plug; a first conductive spring disposed about the refill and contacting the conductive tail plug; a rotating body assembly defining a battery holder that holds a battery, wherein the rotating body assembly is adapted to engage the conductive tail plug such that the conductive tail plug is electrically connected to the battery, and wherein the rotating body assembly further comprises (i) a tubular housing defining a pair of sliding slots, (ii) a conductive plate having opposing terminals that slidably engage the sliding slots, and (iii) a second conductive spring having a lower end that electrically engages the battery and an upper end that electrically engages the conductive plate away from the battery; a rotating wheel comprising a plurality of protrusions extending outwardly from the tubular housing of the rotating body assembly and defining four angled chutes with four longitudinal guiding slots therebetween; a conductive guiding sleeve fixedly disposed in the upper body, the guiding sleeve defining a pair of terminals and four longitudinal inner ribs sized and oriented to slidably engage the longitudinal guiding slots of the rotating wheel; a conductive connector having an upper end that electrically engages the pair of terminals of the conductive guiding sleeve, and a lower end that electrically engages the conductive proximal end of the lower body; a push button assembly that is slidably retained in the upper body having a narrow portion extending through the upper body button aperture and is rotatably locked with respect to the upper body, the push button assembly being biased toward the button aperture, wherein pushing the push button assembly against the bias causes the push button assembly to engage the rotating wheel; and a lamp disposed in the distal end of the lower body, the lamp having a first lead electrically connected to the first conductive spring and a second lead electrically connected to the conductive element, wherein repeatedly pushing the push button assembly causes the rotating body assembly to rotate such that the rotating body assembly moves sequentially from a first position wherein the refill is retracted into the lower body, to a second position wherein the writing end of the refill is extended out of the distal end of the lower body and the terminals of the conductive plate engage the terminals of the conductive guiding sleeve illuminating the lamp, to a third position wherein the refill is retracted, and to a fourth position wherein the writing end of the refill is extended out of the distal end of the lower body and the lamp is not illuminated.