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.

    10/30 (page 8)
    Hall's Improvements in Steam Engines, Eoilers. Furnaces, fyc. the Drawings, Figures 12, and 13; / being a revolving shaft fixed in a move- able carriage h, with the exeentric g upon it, causing the backward and forward movements; and the worm i, which is also placed on shaft / working in the pinions j, j, on the ends of the bars, gives them the circular motion at the same time that they are moving backwards and forwards. 5 Sixth, my improvements in preventing smoke consist of the combination of my improvements in furnaces and in consuming fuel. Seventh, my first improvement in propelling vessels is shewn in Plates I., 2, and 3 ; the parts of this apparatus which I shall first describe in order to render the further description of this improvement more intelligible are the 10 two chambers pl and p2 formed on the outside and bottom of a vessel, being separated by a stop q between them; and each of them has a long narrow aperture r1 and r2, the first pointing towards the stern, and the latter toward the head of the vessel; and the widths of these apertures may be adjusted so as to admit and expel the streams of water into and out of chambers^1 andyr 15 at such velocities as experience may point out to be the best; this is done by moving the plates sl and s2 by the rods t] and t2. This method of propelling consists in drawing water into one of the chambers p1 and p2, and forcing it out of the other with great velocity against a column of water, the altitude of which depends upon the depth which those chambers are below the surface of 20 the water in which the vessel is floating; it will be obvious, that when the water is drawn into chamber p2 through the aperture r\ which points towards the head of the vessel, and forced out of chamber pl through the aperture r1, which points towards the stern, the vessel will be propelled in a forward direction; and when the entrance of the water into and its exit out of the 25 chambers are reversed the vessel will be propelled astern. I shall now proceed to describe the apparatus whereby the above operations are performed. C is a steam engine cylinder with a piston working within it, the rod whereof d is attached to the cross head D; there are two other cylinders E, E, which are also furnished with pistons working within them, 30 the rods whereof k, Jc, are also attached to such cross head; the arrangement of cylinders and the system of valves about to be described are intended to act in the double capacity of a pneumatic and hydraulic apparatus, i. e., not only to pass currents of water through the chambers above mentioned, but also to pass currents of air through the furnaces and flues, and cause such currents of air 35 to perform operations which will hereafter be pointed out. I shall now describe the other parts of the above pneumatic hydraulic appa¬ ratus, and explain the manner in which it acts to effect the processes I have mentioned. The steam cylinder C is provided with steam valves, which may