Abstract: A holding device is removably attached to the protection bow of a pistol. The holding device has a main body, a fixing portion, an abutting portion that is pivotably coupled to the main body, and an accommodation space defined between the fixing portion and the abutting portion for receiving the protection bow.

Abstract: A holding device is removably attached to the protection bow of a pistol. The holding device has a main body, a fixing portion, an abutting portion that is pivotably coupled to the main body, and an accommodation space defined between the fixing portion and the abutting portion for receiving the protection bow.

Abstract: A method of making a tube for a PDA pen includes the steps of providing a tube having a hollow interior, coating a metal layer on the internal surface of the hollow interior, covering a portion of the metal layer on the internal surface, and producing an oxide layer on the uncovered portions of the metal layer so that the uncovered portions of the metal layer are electrically non-conductive and the covered portion of the metal layer remains electrically conductive.

Abstract: A projection apparatus has a frame having a top seat, a main body and a light source module. The main body includes a hanging mechanism that is pivotable about the top seat with respect to a first axis direction and a second axis direction, and a connection seat having an adjustment mechanism that is coupled to the hanging mechanism in a manner that allows for adjustment of the inclination angle between the connection seat and the hanging mechanism. The light-source module is coupled to the connection seat and projects a light plane.

Abstract: A touch control pen for a PDA has a pen holder, and a light source coupled to the pen holder for generating light. Alternatively, the touch control pen has a pen holder, and an element that secures the pen holder to a portion of a PDA. The touch control pen also incorporates a writing implement.

Abstract: A touch control pen for a PDA has a pen holder, and a light source coupled to the pen holder for generating light. Alternatively, the touch control pen has a pen holder, and an element that secures the pen holder to a portion of a PDA.

Abstract: A projection apparatus has a frame having a top seat, a main body and a light source module. The main body includes a hanging mechanism that is pivotable about the top seat with respect to a first axis direction and a second axis direction, and a connection seat having an adjustment mechanism that is coupled to the hanging mechanism in a manner that allows for adjustment of the inclination angle between the connection seat and the hanging mechanism. The light-source module is coupled to the connection seat and projects a light plane.

Abstract: A laser projection apparatus has an adjustment platform having a base seat, a platform portion that is adjustably coupled to the base seat, and an adjustment mechanism that is operatively coupled to the base seat and the platform portion to adjust the inclination angle of the platform portion with respect to the base seat. The apparatus also has a frame body that is connected to the adjustment platform, and a column that is suspended by the frame body and which is separated from the adjustment platform by a distance. The apparatus further includes a first projection light-source mechanism that is connected to the column and which projects a straight light that is parallel to a central axis, and a second projection light-source mechanism which is connected to the column and which projects a light ring that is transverse to the central axis.

Abstract: An illuminable laser sight has a power source, a laser module coupled to the power source, a laser module coupled to the power source and having a laser diode for emitting laser beams, and an adjuster module positioned around the laser module and coupled to the power source, the adjuster module having a front face and a laser light exit formed at the center of the front face and aligned with the laser diode. The laser sight further includes an illuminator module positioned adjacent the front face of the adjuster module, the illuminator module having a plurality of LEDs arranged in an annular manner to define a central bore that is axially aligned with the laser light exit and the laser diode.

Abstract: A light adjustment device for a laser resonant socket having a laser base having a housing that defines a laser chamber that retains a laser diode therein, and a fixing seat disposed at one end of the housing. The light adjustment device further includes an upper cover that is removably coupled with the fixing seat to define a spherical groove, and an adjuster body having a ball and an adjusting shaft, with a resonant socket room defined in the ball, and with a laser resonant socket retained inside the socket room. The ball is seated inside the spherical groove in a manner such that the ball can be pivoted inside the spherical groove to adjust the orientation of the ball and the adjusting shaft with respect to the laser base.

Abstract: An illuminable laser sight has a power source, a laser module coupled to the power source, a laser module coupled to the power source and having a laser diode for emitting laser beams, and an adjuster module positioned around the laser module and coupled to the power source, the adjuster module having a front face and a laser light exit formed at the center of the front face and aligned with the laser diode. The laser sight further includes an illuminator module positioned adjacent the front face of the adjuster module, the illuminator module having a plurality of LEDs arranged in an annular manner to define a central bore that is axially aligned with the laser light exit and the laser diode.

Abstract: A light adjustment device for a laser resonant socket having a laser base having a housing that defines a laser chamber that retains a laser diode therein, and a fixing seat disposed at one end of the housing. The light adjustment device further includes an upper cover that is removably coupled with the fixing seat to define a spherical groove, and an adjuster body having a ball and an adjusting shaft, with a resonant socket room defined in the ball, and with a laser resonant socket retained inside the socket room. The ball is seated inside the spherical groove in a manner such that the ball can be pivoted inside the spherical groove to adjust the orientation of the ball and the adjusting shaft with respect to the laser base.

Abstract: An apparatus for measuring the speed of an object includes a first laser source for emitting a first laser plane at an intended path, and a second laser source for emitting a second laser plane at the intended path, with the second laser source positioned from the first laser source at a known distance. The apparatus further includes a detector system positioned to receive a first laser light and a second laser light that have been reflected from the first laser plane and the second laser plane, respectively, upon reflection of the first and second laser planes off the object. The detector system generates a first pulse signal and a second pulse signal, respectively, in response to the receipt of the first and second laser lights, respectively. The apparatus also includes a signal processing circuit coupled to the detector system for calculating the speed of an object passing through the intended path based on the first and second pulse signals generated by the detector system.

Abstract: A method of manufacturing a laser module is provided, which includes the steps of providing a one-piece cylindrical housing having a bore, a front window and a rear opening, securing a lens piece in the bore adjacent the front window, introducing a laser diode into the bore through the rear opening, applying a force to the laser diode to insert the laser diode into the bore while simultaneously focusing the lens, and ceasing the application of force when the lens has been accurately focused.