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Aiming device for billiard cueAiming device for billiard cue description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080090670, Aiming device for billiard cue. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]1. Field of the Invention [0002]The present invention relates to an aiming device for a billiard cue, and in particular to an aiming device that can provide a high precise aiming in billiards. [0003]2. The Prior Arts [0004]Generally, when striking a cue ball, people use naked eyes to aim at the ball. Due to the inaccuracy of the viewing angle and the difficulty of long-distance aiming, the way of aiming at the ball by naked eyes is not precise enough. It can only help a little to adjust the striking strength and direction of the cue. Hence, ordinary people except for those skilled billiard players are hard to aim at the ball precisely by naked eyes. [0005]Currently, aiming reference points are located at a periphery of a conventional billiard table. If these points are located at the other side of the table, it is inevitable to have a deviation of aiming by naked eyes. Later a laser light aiming device was produced, which could project a light point onto an object ball to be struck, but there is not a baseline between the projection point and the billiard cue, thereby players still cannot aim at the ball precisely. SUMMARY OF THE INVENTION [0006]A primary objective of the present invention is to provide an aiming device for a billiard cue, which can generate a fanned light beam by scattering a parallel light beam through a cylindrical lens. The fanned light beam projects a projection line for aiming at between a cue ball and an object ball. By the projection line, the billiard cue is in alignment with the cue ball and the object ball so that the billiard cue can strike the cue ball to impact onto the object ball along the projection line to let the object ball fall into a pocket. [0007]To achieve the above-mentioned objectives, an aiming device for a billiard cue in accordance with the present invention includes a fixing member, an extending member coupled with the fixing member at one end thereof, a parallel light source coupled with the other end of the extending member and having a projection hole for passing a parallel light beam emitted from the parallel light source, and a cylindrical lens mounted on one end of the parallel light source in front of the projection hole, whereby the parallel light beam becomes a fanned light beam after it passes through the cylindrical lens. [0008]According to the present invention, the parallel light source may be a laser light source or other light sources. The fixing member may be a fixing clamp or a clamp that is sleeved on the billiard cue and fastened with screws. There is no limitation to the structure of the fixing member as long as it can fix the aiming device with the billiard cue. The extending member may be, but not limited to, a curved rigid member. Any flexible or bendable extending members such as a flexible member in accordance with the present invention or a multiple rod linkage with ball pivot mechanisms are applicable, so as to be capable of adjusting a desired angle and a range of the projection light emitted from the parallel light source. The cylindrical lens may be a circular, biconvex, biconcave, plano-convex, or plano-concave cylindrical lens. [0009]The parallel light beam can be refracted by the cylindrical lens to produce a fanned light beam. The fanned light beam is projected to form a projection line when it radiates on a surface of an object. Along the projection line, the billiard cue is in alignment with the cue ball and the object ball so that the cue ball can be hit to impact onto the object ball precisely. Travel trajectories of the cue ball and the object ball can be controlled through the help of the projection line. BRIEF DESCRIPTION OF THE DRAWINGS [0010]The present invention will be apparent to those skilled in the art by reading the following detailed description of a preferred embodiment thereof, with reference to the attached drawings, in which: [0011]FIG. 1 is a perspective view of an aiming device for a cue billiard in accordance with the present invention. [0012]FIG. 2 is a side view of FIG. 1. [0013]FIG. 3A is an enlarged view showing a parallel light source and a cylindrical lens in accordance with the present invention. [0014]FIG. 3B is an enlarged view showing an assembly of FIG. 3A. [0015]FIG. 4 is a schematic view showing a track of a parallel light beam penetrating through a cylindrical lens. [0016]FIGS. 5A-5E are schematic views showing different types of cylindrical lenses in accordance with the present invention. [0017]FIG. 6 is a schematic view showing that the aiming device of FIG. 1 is in use. [0018]FIG. 7 is a schematic view of an aiming device in accordance with a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0019]With reference to FIGS. 1 and 2, an aiming device 1 for a billiard cue in accordance with the present invention comprises a fixing member 10, an extending member 20, a parallel light source 30 and a cylindrical lens 40. The fixing member 10 is coupled with one end of the extending member 20 and the parallel light source 30 is coupled with the other end of the extending member 20. The cylindrical lens 40 is mounted on an end surface of the parallel light source 30, whereby a fanned light beam is projected out of the cylindrical lens 40 when a parallel light beam emitted from the parallel light source 30 passes through the cylindrical lens 40. The fanned light beam is projected on a surface of an object to form a projection line for aiming. [0020]The fixing member 10 is, but not limited to, a fixing clamp in this embodiment. An inner rim of the fixing clamp 10 is configured to fit to an outer shape of a billiard cue P (see FIG. 6) for mounted thereon. A gasket 11 can be further disposed on the inner rim of the fixing clamp 10 so as to securely mount the fixing member 10 to the billiard cue P. Moreover, the fixing member 10 may have a frame configured with the outer shape of the billiard cue P and fixed on the billiard cue P with screws. Continue reading about Aiming device for billiard cue... Full patent description for Aiming device for billiard cue Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Aiming device for billiard cue patent application. ###
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