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A tub boat lift is a type of
The remains of two tub boat lifts can still be seen, in the same region of Germany.
* The Halsbrücke tub boat lift (also known as Rothenfurther Kahnhebehaus), was built in 1788/89 on the Freiberger Mulde. The remains of the Halsbrücke lift and the connecting section of the upper canal were restored in 1988. The tub boats used in this case were 8.5m long and 1.6m wide and when first used carried 2.5 tonnes, upgraded to 3 tonnes later in the canal and lift's working life. This lift worked until 1868.
* The Großvoigtsberg tub boat lift (also known as Christbescherunger Kahnhebehaus), in the neighbourhood of
A tub boat lift is a type of boat lift
A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock.
It may be vertically moving, like the Anderton boat lift in England, rotational, like ...
designed to lift tub boat
A tub boat was a type of unpowered cargo boat used on a number of the early English and German canals. The English boats were typically long and wide and generally carried to of cargo, though some extra deep ones could carry up to . They a ...
s between different elevations of a canal. Tub boats are small boats used to transport coal and other minerals, sometimes working singly, sometimes in long trains. A tub boat lift (german: Kahnhebehaus) lifts the boat out of the water. Most other types of boat lift such as locks
Lock(s) may refer to:
Common meanings
*Lock and key, a mechanical device used to secure items of importance
*Lock (water navigation), a device for boats to transit between different levels of water, as in a canal
Arts and entertainment
* ''Lock ...
or inclined planes
An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load. The inclined plane is one of the six clas ...
are designed to move the boat afloat in some kind of water-filled tank, and, apart from maximum dimensions, are not restricted in the type of craft transported. Tub boat lifts and tub boats are designed to work together as a system. A given lift will only be able to lift boats designed for the lift.
Operation
Tub boat lifts consisted of a moveable hoist travelling on four toothed wheels engaging with two toothed wooden rails, one mounted on each supporting wall. The hoist possessed two drums around which the lifting cables were wound. The lifting ropes passed through pulley blocks before being attached to lifting eyes on the boats to make the lift easier. Four men would wind the hoist when lifting a full 2.5 to 3 tonne tub boat until it was high enough to pass over the dam of the upper canal.Examples
The remains of two tub boat lifts can still be seen, in the same region of Germany.
* The Halsbrücke tub boat lift (also known as Rothenfurther Kahnhebehaus), was built in 1788/89 on the Freiberger Mulde. The remains of the Halsbrücke lift and the connecting section of the upper canal were restored in 1988. The tub boats used in this case were 8.5m long and 1.6m wide and when first used carried 2.5 tonnes, upgraded to 3 tonnes later in the canal and lift's working life. This lift worked until 1868.
* The Großvoigtsberg tub boat lift (also known as Christbescherunger Kahnhebehaus), in the neighbourhood of Freiberg, Saxony
Freiberg is a university and former mining town in Saxony, Germany. It is a so-called ''Große Kreisstadt'' (large county town) and the administrative centre of Mittelsachsen district.
Its historic town centre has been placed under heritage c ...
, was built in 1791 to overcome the difference in elevation between the Mulde
The Mulde () is a river in Saxony and Saxony-Anhalt, Germany. It is a left tributary of the Elbe and is long.
The river is formed by the confluence, near Colditz, of the Zwickauer Mulde (running through Zwickau) and the Freiberger Mulde (with ...
and the Christbescherung mine canal. This canal was not completed, it is therefore possible that this lift was never used. The engineer in charge of the construction of both of these lifts was the Freiberg Kunstmeister Mechanicus Johann Friedrich Mende
Johann, typically a male given name, is the German form of ''Iohannes'', which is the Latin form of the Greek name ''Iōánnēs'' (), itself derived from Hebrew name ''Yochanan'' () in turn from its extended form (), meaning "Yahweh is Gracious" ...
(1743–1798).
* A third tub boat lift was planned near Kleinvoigtsberg but was never built.
See also
*Hay Inclined Plane
The Hay Inclined Plane is a canal inclined plane in the Ironbridge Gorge in Shropshire, with a height of . It was located at the end of the Shropshire Canal, part of a network of canals that linked the industrial region of east Shropshire wit ...
, an inclined plane lift on the Ironbridge Gorge, lifting tub boats on wheeled carriages, rather than in caissons.
References
Further reading
*{{cite book , last= Uhlemann, first= Hans-Joachim, title= Canal lifts and inclines of the world, edition=English Translation, year= 2002, publisher= Internat, isbn= 0-9543181-1-0External links
* The German article on which this article was based Boat lifts