Specification of John Platt : furnaces of steam boilers, &c.

  • Platt, John.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John Platt : furnaces of steam boilers, &c. Source: Wellcome Collection.

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    - I- Platt's Improvements in the Method of Consuming Smoke $ Economizing Fuel. | NOW KNOW YE, that in compliance with the said proviso, I, the said John Platt, do declare that the nature of my Invention, and the manner in which the same is to be performed, is particularly described and ascertained in and by the Drawings hereto annexed and the following explanation thereof ^ (that is to say):— My Improvements in the method of consuming smoke and economizing | fuel are applicable principally to the furnaces of steam boilers, and consist,— f Firstly, in the application of a valve or damper to admit air into the main flue, between the furnace and the chimney, at proper intervals, so as to stop the great draft through the furnace, which damper is opened or closed by the 10 action of the steam gauge in connection with the boiler. Secondly, in admitting a current of air into the ash-pit when necessary, which is also regulated by the steam gauge aforesaid. Thirdly, in causing the said steam gauge to stop or start the feeding apparatus when required. And fourthly, in so forming and arranging the fire bars as always to have a / thin red fire at that end of the furnace nearest the bridge, for the purpose of consuming the smoke as it passes over it from the fresh fuel. In the Drawing accompanying these Presents, I have shewn my improve¬ ments as applied to the furnace of an ordinary tubular steam boiler, similar 20 letters of reference indicating corresponding parts of mechanism in all the Figures. | In Sheet 1, Figure 1 represents a side elevation of the apparatus, and Figure 2, a front view of the same, being drawn to a scale of about three inches to a foot, a, a, is the main framing supporting the casing b9 b, of the 25 steam gauge, the inner cylinder c, c, being suspended by the pressure of the steam, and counterbalanced by the lever and weight d, d. The space between the two cylinders being packed with water or other suitable fluid, steam is admitted from that boiler to the interior of the inner cylinder c9 c, by the pipe e, and the cylinder is so balanced, that any variation in the pressure of the steam 30 will cause the cylinder c to rise or fall, and by means of the upright rod/, actuate the bent lever g, and thus slightly alter the position of the excentric rod h; the excentric rim or clip i, i* is so formed (see sectional Figure 3) that | only one edge at a time can be in gear with the excentric k9 which is caused I to revolve by means of the worm wheel l being actuated by the worm m upon 35 the upright shaft n, which shaft is driven by a band from the feeding apparatus passing around a pulley at its upper end, or in any other convenient manner. . The excentric rod h is suspended from the ceiling by a chain or cord A* and