US213498A - Improvement in preventing incrustations in steam-boilers - Google Patents

Description

A. P. DOEN & J. C. G. MILLER. Preventing Inorustation in Steam-Boilers.

No. 213,498. Patented Mar. 25,1879.

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ALEXANDER P. DOEN AND JOHN O. C. MILLER, OF EVANSVILLE, INDIANA.

IMPROVEMENT lN PREVENTING lNCRUSTATlONS lN STEAM-BOILERS.

Specification forming part of Letters Patent No. 213,498, dated March 25, 1879; application filed July 16, 1878.

To all whom it may concern:

Be it known that we, ALEXANDER P. DoEN and JOHN G. CALHOUN MILLER, of Evansville, Indiana, have invented a new and use ful Improvement for Preventing Inornstations in Steam-Boilers, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The object of our invention is to prevent the formation of incrustations and sediment inside of boilers on the bottom part of their shells; and it consists of a screen formed of wire-cloth with open meshes, or of a piece of sheet metal perforated with holes, and stretched horizontally the entire length and width of the boiler under the fiues and above the bottom of the boiler, where incrustations and sediment are the most troublesome and dangerous. This screen may be provided with a trap-door or other suitable opening near the broom-hole in the boiler, through which the scales can be taken out when desirable.

Figure 1 is an end view of a transverse section of the shell of a boiler having our screen. Fig. 2 is a view of our screen exposed by tearing away a part of the upper portion of the shell of the boiler.

A is the shell of the boiler; B, the fines; O, the Wires around the fines, and twisted together underneath, and the strands then separated, stretched in opposite directions in a line passing across the boiler, and then attached to the screen. The screen hangs from the fines by these wires. The wire screen is stretched upon the frame F, which bears upon and against the sides of the boiler. E is the mud-drum; D, the screen; G, the waterline; H, the trap-door.

During the time that the engine is in motion the scales and incrustations form wholly about the fines, and in the ordinary boiler as soon as the engine stops they settle to the bottom and remain there, forming the hard cake or crust, which is the cause of boilers burning out at the bottom immediately over the fire.

By means of our improvement the screen underneath the fiues catches this falling sediment, and prevents it from reaching the bottom of the boiler, which, in consequence, is kept clean and free from incrustation and scales.

We claim as our invention- The wire screen D, stretched upon the frame F, suspended from the fines by the wires 0, and resting against and upon the shell of the boiler under the fines, all constructed and arranged as shown, and for the purpose specifled.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ALEXANDER P. DoEN. JOHN o. oALHoUN MILLER.

WVitnesses:

THOMAS ScANTLIN, OHAs. F. MARTIN.

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