Might this be of any use to you?
http://www.croftonbeamengines.org/page19.html
Tanya
Robert Waterhouse <[log in to unmask]> wrote:
>Dear List,
>
>
>
>Can anyone tell me how (if at all) very early C19 pumping machinery in
>shafts differed from the later (ie: c.1840-1900) setups, as shown in the
>Harveys and Williams catalogues.
>
>
>
>I am aware that they were bucket-lifts, plungers being a later refinement,
>but don't know whether cast iron valve chests were in use, or even what they
>and their pipework looked like.
>
>
>
>I am trying to draw accurate elevations of such things for a book
>illustration and don't want to get anything wrong - I know how pedantic
>mining historians can be - I am one after all!
>
>
>
>The geographical area concerned is Devon/Cornwall.
>
>
>
>Yours,
>
>
>
>Robert Waterhouse
>
>
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>
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