Talk:Vacuum engine

History
This sounds like a variation on Christiaan Huygens' gunpowder engine. Biscuittin (talk) 18:48, 9 October 2009 (UTC)

Uses
Does the "concept engine" have any practical applications? I suppose it might compete with a hot air engine where only a small power output is required and thermal efficiency is not important. Biscuittin (talk) 20:42, 9 October 2009 (UTC)

Inventor
I believe invented by one Henry Wood in 1758. Can't find a definitive reference though. 109.156.49.202 (talk) 18:09, 24 October 2011 (UTC)


 * That is close, but not definitive:
 * Page 136, Wood 25th May 1759:
 * https://archive.org/stream/chronologicalin1617grea_0/chronologicalin1617grea_0_djvu.txt
 * 739. A  grant  unto  Henry  Wood,  of  High  Hercall,  in  the  county  of  Salop,
 * clerk, of  his  invented  fire  engine  upon  a  new  principal,  different  to  any  method
 * heretofore used  ;  to  hold  to  him,  his  execrs,  admrs,  &  assigns,  within  England,
 * Wales, &  town  of  Berwick-upon-Tweed  for  the  term  of  14  years  pursuant
 * to the  statute  ;  with  a  clause  to  inroll  the  same  within  4  kalendar  months
 * from the  date  hereof.  Witness  His  Matie  at  Westm1,  the  25th  day  of  May,  in
 * the year  above.  By  writ,  &c.
 * Sadly, british patents of that era are lacking in details.
 * https://books.google.de/books?id=cI5fAAAAcAAJ&pg=PA138&lpg=PA138&dq=Henry+Wood+fire+engine+%22High++Hercall%22&source=bl&ots=pPY7CQCpIf&sig=ACfU3U0SNCS4ZxosFnEDAy8PPeX_xnvfvg&hl=de&sa=X&ved=2ahUKEwiTrsDqy4b1AhUKgP0HHStsBegQ6AF6BAgFEAM#v=onepage&q=Henry%20Wood%20fire%20engine%20%22High%20%20Hercall%22&f=false
 * "and at less then half the expense of coals [by hot air]"
 * https://books.google.de/books?id=CRVcAAAAQAAJ&pg=RA1-PA130&lpg=RA1-PA130&dq=%22Henry+Wood%22+%22by+hot+air%22&source=bl&ots=g5PoEz3CpR&sig=ACfU3U0fFHwEr2pNzDK3dCKrY4V1UrOn9w&hl=de&sa=X&ved=2ahUKEwjPpcXZzIb1AhXih_0HHYpEAYkQ6AF6BAgOEAM#v=onepage&q=%22Henry%20Wood%22%20%22by%20hot%20air%22&f=false
 * There are some sources that are specifically naming Henry Wood has the inventor of this specific engine, but that could be false attribution "verified" by cross referencing other sites without proper source.
 * -- MichaelFrey (talk) 19:37, 31 December 2021 (UTC)