Patent ID: 7148962

Claim:
A device for determining the position and direction of channel inlets and channel outlets in sewer manholes which lead into and extend from them in a horizontal or slightly inclined plane, characterized by the fact that a profile tube ( 11 ) mounted by a frame ( 10 ) is associated with a tachymeter ( 1 ), with reflectors ( 13 ) provided in the interior of the profile tube ( 11 ); the profile tube ( 11 ) is structured rectangularly and penetrates through a recess in, and is rotatably mounted on, the middle console ( 7 ); the middle console ( 7 ) is provided with a tubular extension ( 23 ) the axis of which coincides with the stand axis or vertical axis of the tachymeter ( 1 ) and which by way of a connector is associated with an extension consisting of individual telescopingly connected tubes ( 15 ); and the tachymeter ( 1 ) with the profile tube ( 11 ) and the middle console ( 7 ) is arranged on the stand ( 3 ) for 360° rotation between the lower console clamped to the tripod ( 8 ) and an upper console ( 24 ) rigidly connected to each other by a latch ( 9 ).