USRE2806E - Chaeles a - Google Patents

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CHARLES A. HARPER, 0F 'EAHWAK` NEW JERSEjr.`

Le ra Pute-nt Nu. 66,329; datedtly 2, 1867;'.a'nteaatecl June 24, 1867; reissue No. 2,806, dated November 26,

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Be it known that I, CHARLES A. HARPER, of Rahway, in the county of Union, and State of New Jersey, have invented a new and useful Improvement-in Boilers for Heating Water; and I do hereby declaro that thc following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making part of this specification, in which- Figure 1 is a perspective view, and

Figure 2 is a vertical section. y

The same vletters are employed when referring to identical parts.

A i's a. boiler, of any convenient form or desired size. The water contained in this boiler may bc heated by gas, c'oal, or in any other convenient manner. B is a cylindrical recess in the body of the boiler A, through which the heat, with the uneonsnmed products ef combustion, passcsnto and escapes through the pipo'E, rising through tho boiler. The water in the boiler surrounds the recess B and pipe E, increasing to this extent the lire-surface. Within the recess is placed the pipe-formed or annular water-chamber C, which is not connected. with the shell of the boiler, except by the pipes D and D', the former placed at or near thetop, and the latter.

laced at or ncar the bottom. The heat from une fire surrounds and is in contact with all of the external sur- P face of thc chamber C. B is a pipe, formed through the annular chamber C, with a small opening at the top, so-

that part of the draught shall bc through this pipe i3', and part through the space between the annular chamber -C and the shell of the boiler forming the recess B. On account ci' its greater Iire-surface, as compared with thc amour-it ot' water contained, the water will heat far more rapidly in the heater O than it will in the body of the boiler A. The heated water in the heater C, being specifically lighter than that contained in the boiler, will rise, passing through thc pipe D, and to supply its place v. current of water will `:How into the heater below, through thc pipe D. By this means a rapid circulation will be established through the heater, and the heat thus acquired, heilig diffused through the boiler A, will rapidly elevate its temperature.

I do not claim to have been the first to make use of this principle of circulation, but only the means by which it is produced.

What'I clain. as my imrcntion, and desire to secure by Letters Patent, is-

In combination with a boiler, A, an anular water-chamber, C, connected therewith by'pipcs D D', and so constructed and arranged 'that the heat shall bc applied entirely around the latter, and the Water circulate through the same, substantially in the manner set forth. I

In testimony whereof T have signed my name to this specification in tho presence of two subscribing witnesses.

c. A. HARPER.

Witnesses J. R. BALDwiN, Anouar E. BROWN

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