Just before the Summer holiday break, I had the great fortune to run into retired curator Debbie Rudder. Debbie has written much about the Boulton and Watt, along with our Steam Collection and has always been a favourite of the volunteer walkthroughs. We had a lovely time catching up and I asked what she had been working on. Please read below for Debbie’s written response, which is a gem for all our Steam enthusiast volunteers:
Hello Cate,
You asked me if I’d written anything lately that might be of interest to Volunteers.
When I arrived home, I recalled the intriguing drawings directly behind the B&W engine (on the ground floor of the extended exhibition). I did spend a lot of time this year analysing them and related objects, which were originally thought to be architectural drawings, but which I realised are mostly engineering drawings. Sorting through them, identifying and understanding them was quite a big task.
I wrote about the main drawing on that wall, of the St Petersburg Mint equipment, some years ago.

The other drawing that I know is there is of a ‘vacuum trumpet’ for a British Mint coining press. You can read my analysis of the object on the MAAS website.


I found the related vacuum pump drawing (shown right) to be of particular interest, and hope I am right in stating that this was the first use of vacuum in an industrial process. Of course, Boulton & Watt’s engineers were very familiar with its use in steam engines, so it’s not surprising that they applied the concept to minting.
A nice rendered drawing of one of those presses (with boy feeding blanks into it) can be seen below and here.
I think there are one or two other drawings reproduced beside the vacuum trumpet. I wish I had thought to look today! If any Volunteers are interested in them, they could put the search term ‘british mint boulton’ into OPAC and look for them.
Regards,
Debbie







It was so interesting to have her introduce us to staff and show how the digitalisation and packing up was progressing. Really exciting!’
