poppet head

(Mining & Quarrying) the framework above a mining shaft that supports the winding mechanism

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

References in periodicals archive ?

THE OLD DAYS: A Ravenswood street scene around 1900, probably photographed from the London North poppet head. Buildings visible from left to right include: Court house, post office, Browns Hotel, Imperial Hotel in distance, Thorps Buildings, Thorps Mining Exchange, New Ravenswood Hotel and the Railway Hotel.

Girder that was a blast from our past

For greater efficiency, the rMAXTM is engineered with contoured valve seats, operating with specially-shaped poppet heads to provide maximum flow through the valve seat and guard.

Latest compressors, too, are going green; new accessories also score on efficiency

For greater efficiency, the valve is engineered with contoured valve seats, operating with specially-shaped poppet heads to provide maximum flow through the valve seat and guard.