THEODOLITE SURVEYING LESSON 2

     THEODOLITE SURVEYING LESSON 2

 PARTS OF THEODOLITE

1.     Tribrach and trivet

2.     Foot screws

3.     Upper plate

4.     Lower plate

5.     Upper clamping screw

6.     Lower clamping screw

7.     Horizontal plate bubble tubes

8.     Vertical plate bubble tube

9.     Vertical  plate clamping screw

10.  Telescope

11.  Standards or `A` frame

12.  Magnifying glasses

FUNCTIONS OF  PARTS OF THEODOLITE

1.     Tribrach and trivet

Supports the horizontal axis

Accommodates the foot screws

2.     Foot screws

                    To level the theodolite

3.     Upper plate

             It contains vernier scale to read horizontal angle (minutes and seconds)

4.     Lower plate

          Contains graduated  plate ( 0 to 360 degrees)

5.      Upper clamping screw

                        To clamp the upper plate

6.         Lower clamping screw

     To clamp the lower plate

7.       Telescope

         To see far away objects clearly

8.       Standard or `A ` frame

                    To support the horizontal axis

9.       Magnifying glasses

                      To see clearly the graduations on the Main  and Vernier scale

FUNDAMENTALS  LINES OF THEODOLITE

1.     Vertical axis

2.     Axes of plate levels

3.     Line of collimation (line of sight)

4.     Horizontal axis

5.     Bubble line of the altitude level (azimuth) or Telescope level

1.  VERTICAL AXIS

    It is the axis about which the Telescope can be rotated in a horizontal plane

2.   Axis of plate level

  It is the straight line tangential to the longitudinal curve of  plate level tube at its centre

3.   Line of Collimation

   It is an imaginary line joining the intersection of cross hairs and centre of object glass and its continuation. (Line of sight)

4.   Horizontal axis

     It is the axis about which the telescope can be rotated in vertical plane. (trunnion axis or transverse axis)

5.    Bubble line of the altitude level

   It is an imaginary line tangential to the vertical circle bubble at its  centre and its continuation. (Axis of telescope level)

CLICK HERE FOR LESSON 1

CLICK HERE FOR LESSON 2

CLICK HERE FOR LESSON3

CLICK HERE FOR LESSON 4

CLICK HERE FOR LESSON 5

CLICK HERE FOR LESSON 6

CLICK HERE FOR LESSON 7

CLICK HERE FOR LESSON 8

     

              

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