Specification of Samuel Hall : boilers, furnaces and flues.

  • Hall, Samuel.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : boilers, furnaces and flues. Source: Wellcome Collection.

    9/22 (page 7)
    Hall's Improvements in Boilers, Furnaces, Flues, ($u causes the wheel J to revolve in the direction shewn by the arrow upon it, and the teeth n, n, and o, o, act upon the two spur wheels H and I, which also revolve in the directions shewn by the arrows on them, and thereby shut and open the two cocks C and D alternately. The Drawing shews the cock 5 C just closed. The teeth n> n, n, having just acted upon the wheel H, (the vessel B being now full of water,) the teeth o, o, o, act upon the wheel I and open the cock D, whereby the water is allowed to descend in the boiler by its superior specific gravity over that of steam (which is admitted above it by pipe c); the teeth o, o, o, are followed by teeth n, n, n, which shut the 10 cock D, and when that is done the teeth o, o, o, open the cock C, and allow the vessel B to be again filled writh water through pipe F from cistern G; the teeth n, n9 n, then shut the cock C, and come again to their situation as shewn in the Drawing ready for repeating the above opera¬ tion. It is obvious that by this routine of opening and shutting the two 15 cocks an uniform and certain supply of water to steam boilers will be effected, and that such will be the case no matter how great the pressure at which they are worked, for it is evident that by means of the pipe c the pressure at the top of the vessel B will be as great as in the boiler, and that the wrater will descend as above mentioned from the former to the latter by 20 the superiority of its specific gravity over that of steam. The supply of the requisite quantity of water to the boiler is regulated by the float p; it is counterbalanced by the weight q by means of the lever r and the rod s, the slot therein t in the latter inclosing the bolt k, which raises and lowers it on the cones i and j exactly as the float rises and falls. The line u shews the proper 25 height of the water in the boiler, and it is obvious that if the water lowers in it the float will descend, and cause the belt k to do the same, and thereby drive the apparatus quicker, and increase the supply of the water, and that in the event of the water rising above the water line the float will also rise and perform the reverse operation, and thereby reduce such supply. 30 The second apparatus for supplying water to boilers by valves is similar to that described as furnished with cocks, and is shewn by Drawing, Figure 1, Sheet 3. A,'A, being the top of a steam boiler ; B, a cylindrical vessel to be alternately filled with water, and emptied into the boiler as already described to be done by cocks; C, C, and D, D, are two pairs of valves to 35 answer the same purpose as the two double-way cocks as before shewn by the same letters in Sheet 2 ; a, a, and b, b, are two pipes to connect and dis¬ connect the boiler and vessel B, by the opening and shutting of the latter pair of valves; and c, c, and d, dy are two other pipes, the former to connect and