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dommekracht / jack


Oude techniek en werktuigbouw,
industriŽle geschiedenis en archeologie
Historical engineering and technology,
industrial archaeology and history
© AdO 1998 ... 2004


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Steam crane of the 1860s, designed by J. Campbell Evans

The description and illustrations given here are taken from Spon's Dictionary of Engineering, Div. VI, pp.2237-2239, edited by Oliver Byrne and published in 1873 by E.& F.N. Spon in London.

General description

General view of the crane This steam-crane was designed by J. Campbell Evans for use on board steam-vessels. Its special advantages are: compactness, facility of fixing, simplicity in the mode of working, and durability. The boiler A is placed as close as possible to the crane, and revolves with it, The top of the boiler is made of cast iron, with lugs for attaching the tension-rods of the crane-arm. In this way, it serves the double purpose of boiler and crane-post.

The bed-plate B upon which the boiler and crane are placed is fixed to the foundation plate C by a centre bolt, which bears all the upward strain; the downward pressure is taken by the rollers D running on the foundation plate C. This plate is solidly embedded on timber laid on the deck of the vessel.
Side view of the steam crane Front view of the steam crane

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