Watt's Rotative Steam Engine - 1787

Historic Steam Engines Series: 1787 - Mr. Watt's Patent Rotative Steam Engine, as constructed by Messrs. Boulton and Watt, Soho, from 1787 to 1800, 10 Horse Power

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"After the rotative engine had thus been brought to a standard form, Mr. Watt
made no further alterations during the remainder of the term of his patent, except
such modifications as became necessary in manufacturing engines of all sizes from
4 horse-power to 100 horse-power. A great number of rotative-engines were
made by Messrs. Boulton and Watt at their manufactory at Soho near Birmingham,
and were fixed up in every part of the kingdom, and many were exported.
They were called patent engines, and were looked upon as standards of perfection
in mechanical works : many of them are still in use, and their performance is fully
equal to that of any modern engines which operate on the same principle." Farey: "A treatise on the Steam Engine", London 1827

Based on:
https://archive.org/details/treatiseo...
https://books.google.be/books/about/T...

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