Regulation 3.2 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR AN INNOVATION PATENT ORIGINAL Name of Applicant: Precaster Enterprises Co., Ltd Actual Inventor: Nen-Tsua Li Address for Service: C/- MADDERNS, First Floor, 64 Hindmarsh Square, Adelaide, South Australia, Australia Invention title: THEODOLITE WITH LASER INDICATORS The following statement is a full description of this invention, including the best method of performing it known to us.
la THEODOLITE WITH LASER INDICATORS The present utility model relates to a theodolite, and more particularly to a theodolite with laser indicators generating laser beams to indicate a predicted 5 position for improved measuring accuracy. A conventional theodolite has been disclosed in Taiwan patent No. TW534312 and has a base, a body and three laser indicators. The body is fixed on the base and has three orthogonal surfaces. The three laser indicators are respectively, rotatably mounted on the three orthogonal surfaces of the body. The 10 three laser indicators respectively generate three orthogonal laser beams to indicate X-, Y- and Z-axes to improve 3-D measuring and precisely display a predicted position. However, the body is fixed on the base and cannot be rotated. Therefore, laser beams from the three laser indicators only can be adjusted one by one and 15 cannot be directly rotated on the body to adjust an indicating angle. Furthermore, the conventional theodolite has three laser indicators, which are difficult to simultaneously calibrate. To overcome the shortcomings, the present utility model tends to provide a theodolite with laser indicators having a rotatably body to mitigate or 20 obviate the aforementioned problems. The main objective of the utility model is to provide a theodolite with laser indicators generating laser beams to indicate a predicted position for improved measuring accuracy. The theodolite with laser indicators comprising a seat, a body, a rotating 2 case, a horizontal laser indicator and a vertical laser indicator. The seat can be set on a tripod and has a level base. The level base is adjustable and can be adjusted to a virtual level. The body is rotatably mounted on the level base and has a frame and two arms. The frame has a top. The two arms respectively extend from 5 the top of the frame. The rotating case is rotatably mounted between the two arms of the body and has a top and a bottom. The horizontal laser indicator is rotatably mounted on the top of the rotating case and generates a horizontal laser beam. The vertical laser indicator is rotatably mounted on the bottom of the rotating case and generates a vertical laser beam. The horizontal and vertical 10 laser indicators indicate a predicted position for improved measuring accuracy. Other objects, advantages and novel features of the utility model will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. Fig. 1 is a front perspective view of a theodolite with laser indicators in 15 accordance with the present invention; Fig. 2 is a rear perspective view of the theodolite with laser indicators in Fig. 1; Fig. 3 is a front view of the theodolite with laser indicators in Fig. 1; Fig. 4 is an operational top view of the theodolite with laser indicators in 20 Fig. 1; Fig. 5 is an operational perspective view of the theodolite with laser indicators in Fig. 1; and Fig. 6 is an operational perspective view of the theodolite with laser indicators in Fig. 5, the laser indicators being adjusted.
3 With reference to Figs. 1 to 3, a theodolite with laser indicators in accordance with the present utility model comprises a seat (10), a body (12), a rotating case (13), two laser indicators (20) and a telescope (30). The seat (10) has a bottom, three adjusting knobs and a level base (11). 5 The bottom of the seat (10) may be set on a tripod. The three adjusting knobs are rotatably mounted on the bottom. The level base (11) is adjustable and is adjustably mounted on the three adjusting knobs and can be adjusted to a virtual level by the three adjusting knobs. The body (12) is rotatably mounted on the level base (11) and has a 10 frame (121), two arms (122), a laser controller (123) and a theodolite controller (124). The frame (121) is rotatably mounted on the level base (11) and has a top, a front surface and a rear surface. The two arms (122) respectively extend from the top of the frame (121). The laser controller (123) is mounted on the rear surface of the frame (121) and can control the laser indicators (20). The 15 theodolite controller (124) is mounted on the front surface of the frame (121) and can control the theodolite. The rotating case (13) is rotatably mounted between the arms (21, 22) and can be turned to adjust a locating angle, and has perpendicular planes, and may has a front, a rear, a top, a bottom, a through hole (131) and a laser recess 20 (132). The front and the rear of the rotating case (13) are perpendicularly defined between the top and the bottom of the rotating case (1 3).The through hole (131) is formed through the front and the rear of the rotating case (13), and may be a circular hole. The laser recess (132) is formed in the bottom of the rotating case (13) 4 adjacent to the front and has a side wall and a slot. The side wall is perpendicular to the front of the rotating case (13). The slot is formed in the front of the rotating case (13) and communicates with laser recess (132). With further reference to Fig. 4, two laser indicators (20) relatively 5 mounted at perpendicular planes and being rotatably mounted on the bottom of the rotating case (13) and respectively generating horizontal and vertical laser beams. The laser indicators (20) are a horizontal laser indicator (21) and a vertical laser indicator (22). The horizontal laser indicator (21) is rotatably mounted on the top of the rotating case (13), generates a horizontal laser beam 10 and can be turned to adjust a horizontal indicating angle of the horizontal laser beam. The vertical laser indicator (22) is rotatably mounted on the bottom of the rotating case, may be in the side wall of the laser recess (132), generates a vertical laser beam, which may pass through the slot of the laser recess (132), and the vertical laser indicator can be turned to adjust a vertical indicating angle 15 of the vertical laser beam. The telescope (30) is mounted in the through hole (131) of the rotating case (13) and has an eyepiece (31). The eyepiece (31) is mounted on the rear of the rotating case (13). In use, the two laser indicators (20) can are used and adjusted 20 independently or simultaneously as is well known in the art. With further reference to Fig. 5, in independent use, the horizontal laser indicator (21) generates the horizontal laser beam to measure the gradient or indicate the horizontal predicted position. The vertical laser indicator (22) generates the vertical laser beam to indicate the vertical predicted position and 5 can be controlled by the laser controller (123) to change a vertical indicating angle and mark the predicted position. With reference to Fig. 6, in simultaneous use, the horizontal laser indicator (21) and the vertical laser indicator (22) respectively generate 5 horizontal and vertical laser beams and display cross lines on the wall or the like to improve measuring accuracy. In addition, the rotating case (13) is able to be turned to adjust the locating angle and make the laser beams from the laser indicators (20) cross at different position on the wall or the like to provide a convenient application. 10 Furthermore, the theodolite also has the telescope (30) being controlled by the theodolite controller (124) to make a transit survey and provide a multi use theodolite. Even though numerous characteristics and advantages of the present utility model have been set forth in the foregoing description, together with 15 details of the structure and function of the invention, the disclosure is illustrative only. Changes may be made in detail, especially in matters of shape, size and arrangement of parts within the principles of the utility model to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.