- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A hammer for shingling or forging iron, arranged as a lever of the first or third order, and tilted or tripped by means of a cam or cog gearing and allowed to fall upon the billet, bloom, or bar.
Industry:Mining
A hammer that uses compressed air for producing the impacting blow.
Industry:Mining
A hammer with two pointed ends for picking the stone after the spalling hammer.
Industry:Mining
A hand auger used to drill boreholes in soft rock or rock material, such as soil, clay, coal, etc.
Industry:Mining
A hand drill in which the drill holder is revolved intermittently by a lever through a ratchet wheel and pawl. A drill used for boring slate.
Industry:Mining
A hand drill that can be used in a river on a barge or on a platform built on two large canoes. Basically, it consists of four straight poles, 5 to 7 in (12.7 to 17.8 cm) in diameter at the large end, which are set into notches in planks to prevent their sinking into the ground. The poles are joined at the top by a shaft that holds the pulley for the drill wire or rope. The walking beam is activated by 8 to 10 persons lining up on the crossarm. They pull down to raise the tools and vary their manner of movement, depending on whether they are driving casing, drilling, or pulling casing. The Ward drill is most efficient in shallow ground, but can be used in depths up to 90 ft (27.4 m).
Industry:Mining
A hand hammer having a rawhide head that serves to prevent bruising metal parts against which it is used.
Industry:Mining
