Collection:
Juneau—Douglas City Museum
Object ID:
2007.22.137
Accession#:
2007.22
Credit Line:
Transferred from the U.S. Bureau of Land Management.
Object Name:
Drill
Title:
Pneumatic Mining Drill
Year Range from:
1900
Year Range to:
1917
Description:
Pneumatic Drill.
Large steel mining drill. Object has a large central body cylindrical in shape. On the side of the center cylinder there is a capital "T" within a diamond, this is the Treadwell Logo. On the bottom of the central cylinder is a plate that is designed to be mounted to a tripod when in use. On the very front of the central cylinder is a face plate that has raised letters which say: "Patented/Jul 10, 1894/Dec 28, 1900."
On the top end of the central cylinder is a series of three rods. The middle rod is threaded. On top of these three rods is a handle which is attached to the central threaded rod. This rod is used to move the drill along it's tripod and keep the drill bit a certain distance from the rock being drilled.
To the bottom of the central cylinder are three rods. The central rod is thicker and heavier than the outside two. It encases a piston. At the end of this central rod is a heavy steel foot. This is where the drill bit would have been attached.
Large steel mining drill. Object has a large central body cylindrical in shape. On the side of the center cylinder there is a capital "T" within a diamond, this is the Treadwell Logo. On the bottom of the central cylinder is a plate that is designed to be mounted to a tripod when in use. On the very front of the central cylinder is a face plate that has raised letters which say: "Patented/Jul 10, 1894/Dec 28, 1900."
On the top end of the central cylinder is a series of three rods. The middle rod is threaded. On top of these three rods is a handle which is attached to the central threaded rod. This rod is used to move the drill along it's tripod and keep the drill bit a certain distance from the rock being drilled.
To the bottom of the central cylinder are three rods. The central rod is thicker and heavier than the outside two. It encases a piston. At the end of this central rod is a heavy steel foot. This is where the drill bit would have been attached.
Notes:
This drill was manufactured by the Treadwell foundry. The drill is a Holman Brothers design patented on July 10, 1894 and December 28, 1900. Used to drill blast holes underground in the Treadwell Mine. This drill was eventually removed from the mines; fitted with a hammer; mounted on a bench in a work shop; and used to hammer hot drill steel into a die to flare it out and form a drill bit.
Called a "Jack Leg."
Called a "Jack Leg."
People:
Corbus, William
Search Terms:
Treadwell
Foundry
Mine
Mining
T&E
JMIC
Foundry
Mine
Mining
T&E
JMIC
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Pneumatic Drill
Pneumatic Drill
Pneumatic Drill
Pneumatic Drill