The almost one metre long WK 970 was the first bracket to support four pipes(lines) in a horizontal array in underground mining and tunnelling.

Many people may not appreciate that underground mining and tunnelling were in the "dark ages"* in the early 90's - because this WK 970 bracket may have been also the first bracket to be certified by a chartered engineer!

 

*

Perhaps ten years earlier, in the early 80's, should be described as Prehistoric Times as a roll of fencing wire was chopped (with an axe) into two equal-length arcs and the individual arcs were threaded over the roof support and the ends wound together underneath to support pipelines.  All was fine until a pumpout line, which surges with the plug of water being pumped, collapsed in a chain reaction.  Several pillar-lengths of pipeline ended up on the "floor" of the coal mine and the "engineers" actually designed something which made a major improvement (for a while).

 

. the invention BHP stole .

 

MINING ENGINEERS?