Device for setting the direction and/or the inclination of an el

Details Device for setting the direction and/or the inclination of an el Device for setting the direction and/or the inclination of an el

1979-10-26

1981-09-08

Reynolds, Wm. Carter

Supports

With indicator or inspection means

33365, 33395, 33397, 173 20, 173 43, 248647, E21C 100, E21C 3506

Patent

active

042880564

ABSTRACT:
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 prepositioning 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.

REFERENCES:
patent: 3094796 (1963-06-01), Atchley
patent: 3113283 (1963-12-01), Fliegler et al.
patent: 3896885 (1975-07-01), Dahlstrom
patent: 3900073 (1975-08-01), Crum
patent: 3945129 (1976-03-01), Bergkvist
patent: 3975831 (1976-08-01), Jysky et al.
patent: 4022284 (1977-05-01), Crow
patent: 4159577 (1979-07-01), Bergkvist

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