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British Industrial History

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Stephen Maberley

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Sometimes shown as John A. Maberley, a London currier

By 1790 Jabez Carter Hornblower had set up in business in London with financial backing from well-to-do currier John Maberly, where he designed a new steam engine based on the patented designs of Isaac Mainwaring.

Held steam engine patent with Jabez Carter Hornblower. A. P. Woolrich refers to J. A. Maberley, a London currier, as the purchaser of Isaac Mainwaring's 1791 patent. Jabez Hornblower improved the engine by closing the tops of the cylinders and using a separate condenser, and installed an improved engine at the Meux brewery. This led to legal action being taken by Boulton and Watt. [1]

1796 Hornblower and Maberly were sued by Boulton and Watt, who claimed one of Watt's patents – concerning the condenser had been infringed. [2] After a long trial, judgement in 1799 was in favour of Boulton and Watt and brought about the collapse of Hornblower and Maberley's business.

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Sources of Information

  1. A. P. WOOLRICH (1984) Hornblower and Maberley Engines in London, 1805, Transactions of the Newcomen Society, 56:1, 159-168, DOI: 10.1179/tns.1984.010
  2. Hereford Journal - Wednesday 21 December 1796