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Mine Suction Pump of Bored Logs: Perforated Trunk, Valve Box and Leather-Shoe Piston (Agricola, 1556)
Georgius Agricola (tr. H. C. and L. H. Hoover) · Public domain
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Mine Suction Pump of Bored Logs: Perforated Trunk, Valve Box and Leather-Shoe Piston (Agricola, 1556)

Agricola's first suction pump for draining mine sumps, from De Re Metallica, Book VI (1556): logs bored into pipes stand on a perforated trunk two feet deep in the sump, with a bottomless metal valve box one palm deep; a workman on the flooring works a piston whose leather shoe, or better a perforated iron or wooden disc, lifts the water to a spout into the tunnel drain.
Erfahren
Several days

Anweisungen

1

Units and lift

Jupyter-Notebook wird geladen …
2

Read De Re Metallica, Book VI

"Thus the workman, eager at his labour, standing on the flooring boards, pushes the piston down into the pipe and draws it out again."
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Bore the pipes

Bore straight logs through their length to make the pipe, first with a borer with an auger and then with a wider borer (Illustration 177, O-Q). Use one length, or two with one joined into the other.

Materialien für diesen Schritt:

BaumstammBaumstamm2 Stück

Benötigte Werkzeuge:

ErdbohrerErdbohrer
Handbohrer (Nabenbohrer)Handbohrer (Nabenbohrer)
AxtAxt
ZugmesserZugmesser
4

Make the trunk and valve box

Make a trunk two feet deep, hollow like the pipe, its lower opening blocked with a round piece of wood and its sides perforated round about so water flows in. Make a box of iron, copper or brass one palm deep, without a bottom, closed by a rounded valve that stops the raised water running back. Set it in the top of the trunk if there is one pipe, or in the lower pipe at the joint if there are two.

Materialien für diesen Schritt:

BaumstammBaumstamm1 Stück
HartholzbrettHartholzbrett1 Stück
BaustahlblechBaustahlblech1 Stück
GeschirrlederGeschirrleder1 Stück

Benötigte Werkzeuge:

ErdbohrerErdbohrer
StechbeitelStechbeitel
Bügelsäge (Metallsäge)Bügelsäge (Metallsäge)
HammerHammer
EsseEsse
AmbossAmboss
5

Set the pipe

Lay a flooring over the sump. Let the pipe down through it to the bottom of the sump with the trunk on its lower end, and fix it with pointed iron clamps driven in straight on both sides. Cut an opening or spout in the upper pipe reaching to the drain of the tunnel.

Materialien für diesen Schritt:

KiefernbrettKiefernbrett4 Stück
Baustahl-FlachstahlBaustahl-Flachstahl2 Stück
NägelNägel1 Stück

Benötigte Werkzeuge:

HandsägeHandsäge
HammerHammer
ErdbohrerErdbohrer
6

Make the piston

Fit the piston rod with a hand-bar at the top. At the bottom fix either a shoe, a leather covering stitched almost cone-shaped, tight round the rod and wide open at the top, or (far better) a disc of iron one digit thick or of wood six digits thick, fixed by an iron key through the rod or screwed on, with five or six round or oval openings in a star and a cover over them, the same diameter as the inside of the pipe.

Materialien für diesen Schritt:

HartholzbrettHartholzbrett1 Stück
GeschirrlederGeschirrleder1 Stück
BaustahlblechBaustahlblech1 Stück
Baustahl-FlachstahlBaustahl-Flachstahl1 Stück

Benötigte Werkzeuge:

AhleAhle
Zwei SattlernadelnZwei Sattlernadeln
HandbohrerHandbohrer
Feilen (Handfeile)Feilen (Handfeile)
HandsägeHandsäge
7

Pump

Standing on the flooring, push the piston down and draw it up. On the up-stroke the cover closes the disc openings and the water above is lifted to the spout, while the valve of the box opens and water from the trunk rises by suction; on the down-stroke the valve closes and the water passes up through the disc.
8

Troubleshooting

Suction pump troubleshooting.

Flow

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9

History and honest limits

From Georgius Agricola, **De Re Metallica** (1556), Book VI, translated by Herbert C. and Lou H. Hoover, 1912 (Gutenberg 38015; checked on the archive.org scan georgiusagricola00agri, pp. 176-177). He gives no bore, pipe length or lift. The metric equivalents of his Roman units, the suction limit and the tools are ours.

Materialien

7

Benötigte Werkzeuge

14

Dieser Bauplan stellt her

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Platzhalter

Wasserpumpe

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