a. A covering over a mine cage, which serves as a roof to shield it from objects
falling down the shaft, thereby protecting the riders. Syn:
cage cover
b. A cap piece for an upright timber. Zern
c. The metal casing
of a miner's flame safety lamp, with openings at the top and a hook for
carrying the lamp. The bonnet protects the inner gauze from damage and from the
impact of high-velocity air. See also: safety lamp
d.
Syn: air dome
e. The cap over the end of a pipe. Strock,
1
Source: Dictionary of Mining, Mineral, and Related Terms
Source:
Dictionary of Mining, Mineral, and Related Terms
