Device for setting the direction and/or the inclination of...

Details Device for setting the direction and/or the inclination of... Device for setting the direction and/or the inclination of...

E - Fixed Constructions

21

B

255/35

E21B 7/04 (2006.01) E21B 15/04 (2006.01)

Patent

CA 1109857

ABSTRACT OF THE DISCLOSURE A device for setting the direction and/or inclination of an elongated rock drilling apparatus. The actual value of the direction in each of two perpendicular planes is sensed by a rotatable screen having a pattern of parallel opaque lines separated by interspaces. Corresponding set values are set by propositioning a carrying member on which a second screen is mounted which also has a pattern of lines and interspaces. The elongated rock drilling apparatus and the carrying member are moved in common until the line patterns on the screens form a desired moire pattern.

338598

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