METHOD OF AND ELECTRIC CIRCUITRY FOR SIGNALLING POSITION OF A MECHANICAL COAL MINER IN RESPECT TO A LONGWALL

摘要

2. The electric circuit for signalling the position of a mechanical coal miner in a longwall, particularly at the time of its approaching to the junction of a longwall with a stringing deal drift characterized in that it has a detector of the mechanical coal miner (1) position, build-in and fixed at the distance (L) from the junction of the longwall with the stringing deal drift and it has a detector of the operation (3) of the mechanical coal machine (2) connected with a time coincidence block (4), which is also connected from one side with the detector of the mechanical coal machine (1) position, and on the other side, with the elements of acoustic and optical signalling device (6) through a time delay block (5).IMAGE