Specification of Samuel Hall : steam engines, boilers, furnaces, &c.

  • Hall, Samuel.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : steam engines, boilers, furnaces, &c. Source: Wellcome Collection.

    4/30 (page 2)
    Hall's Improvements in Steam Engines, Boilers, Furnaces, NOW KNOW YE, that in compliance with the said proviso, I, the said Samuel Hall, do hereby declare that the nature of my said Inventions, and the manner in which the same are to be performed, are fully described and ascertained in and by the following description thereof, reference being had to the Drawings hereunto annexed, and to the figures and letters marked thereon 5 (that is to say):— — I shall now state the objects and the nature of my several improvements in the order in which they are mentioned in the said Letters Patent. First, the object and nature of my improvement in steam engines consist in the admission of injection water to all kinds of injection steam engines by 10 means whereby it shall be so measured as to supply a given quantity of it to condense a given quantity of steam at whatever speed the engines may be working, and whereby the water shall be introduced into the condenser more or less frequently, according as the steam pistons are moving at a greater or less speed, and whereby also the injection water shall cease to flow altogether ^5 when the engines are brought from any cause whatever to a state of rest, and moreover the whole of the quantity of injection water required to condense a cylinder full of steam is admitted instantly into the condenser at the moment the steam is entering therein from the cylinder, instead of such injection water entering during the whole of the stroke of the steam piston ; whereas by the 20 common method of introducing the injection wTater, videlicet, by means of the uninterrupted pressure of the atmosphere and injection cocks or valves, it enters the condensers with the same velocity whether the engines are going at a quick or at a slow speed, or even when they are stopped, unless the injection cocks are carefully regulated or closed by hand, and the steam moreover enters 25 in a continued stream during the whole of the stroke of the steam piston, in¬ stead of its entering in the requisite quantity suddenly at the commencement of each stroke of the steam piston, and none entering during the remainder of the stroke of such piston. Second, the object and nature of my improvements in boilers consist, first, 30 in an improvement in such boilers as have internal fires, which is intended to supply atmospheric air to such fires for the purpose of consuming the smoke and inflammable gases arising therefrom ; second, in a particular arrangement of tubes, whereby so extensive a quantity of metallic surface is presented to the flame and heated gases resulting from the combustion of fuel as shall cause 35 their caloric or heat to be given out to the water or other fluids surrounding them in boilers in a more complete manner than is commonly effected. Third, the objects and nature of my improvements in furnaces are the in¬ creasing of their durability, and their efficiency in consuming the smoke and