page_title: John Weale
section_title: Life
hierarchical_section_title: John Weale / Life
caption_attribution_description: English: Diagram of annular type marine steam engine designed by Messrs. Maudsley. This type of engine used the same connection mechanism to the crankshaft as Maudslay's Siamese engine, but used one large annular cylinder wrapped around the crosshead instead of two cylinders either side. Text accompanying the above diagram in the original source is as follows: "In this variety the piston is made in the form of a ring, a, a, encircling an inner cylinder, b. Two piston rods, c, c, communicate the reciprocating motion to the ... crosshead d, which descends into the inner cylinder, where it is joined to the lower end of the connecting rod. The latter slides between vertical guides on the face of the internal cylinder, the head of the connecting rod being in connection with the crank pin, as usual. The advantage to be derived from this arrangement is, that a long connecting rod is thereby obtained without unduly increasing the height of the paddle shaft."
context_page_description: John Weale was an English publisher of popular scientific, architectural, engineering and educational works.
context_section_description: He went into the trade first with George Priestley in St Giles-in-the-Fields who died around 1812, and worked then with Priestley's widow. He took a particular interest in the study of architecture. In 1823 he issued a bibliographical Catalogue of Works on Architecture and the Fine Arts, of which a new edition appeared in 1854. He bought the architectural publishing business at 59 High Holborn built up by Isaac Taylor and his son Josiah Taylor as The Architectural Library, after Josiah's death in 1834.
  He followed the Catalogue in 1849–50 with a Rudimentary Dictionary of Terms used in Architecture, Building, and Engineering, a work which reached a fifth edition in 1876.
  Weale died in London on 18 December 1862.
caption: Diagram of an annular engine, from Robert Murray, Rudimentary Treatise on Marine Engines and Steam Vessels (1858), published by John Weale.
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