US49556A - Improvement in steam-generators - Google Patents

Description

UNITED STATES HENRY O. SERGEANT,

OF COLUMBUS, OHIO.

IMPROVEMENT IN STEAM-G EN ERATORS.

Specification forming part of Letters Patent No. 49,556, dated August 22, 1865.

To all whom t may concern.-

Beit known that l, HENRY O. SERGEANT, of the city of Columbus and the State of Ohio, have invented a new and Improved Mode of Constructing Steam-Boilers; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention eonsistsin placing sheets of metal, cylinders, or tubes around the fire-surface of boilers, so arranged that the circulation will carry the water up along the fire-surface much higher than that on the outside of the sheet or metal cylinder, as shown in Figure l, but, as shown in Fig. 2, much higher on the outside than insidef` By this arrangement the tire-surface will always be covered with water as long` as there is any above the lower edge ofthe sheet, cylinder, or tubes around the fire-surface and heat enough to produce the circulation; also, the circulation is so great that the sides of the metal and tire-snrface are scoured, and kept perfectly clean, free from lime or sediment. y

To enable others skilled in the art to construct and use my invention, I will proceed to describe its construction.

Fig. l represents a vertical cross-section of a vertical boiler. Fig. 2 represents a vertical cross-section ofa common cylinder-boiler,show ing how the improvement can be. used in different forms of boilers.

Letters A A in Fig. l represent the lire-box; B, the fire line through which the heat und smoke pass from the fire-box.

O O represent the cylinder or casing placed around the fire-box, fastened with set-screws at the top and bottom, or otherwise, with a space at the bottom to admit of the tlow of water and steam upward.

D D represent the outside shell of the boiler.

E E represent the tube or cylinder placed around the fire-line, with openings bottom and top the same as around the fire -boX, for the passage of water. For ordinary purposes one tire-flue may be sufficient, but, if found advantageous, several may be used, with theimprovement attached to all.

F F represent the crown-sheetof the fire-box.

G G G represent three gage-cocks, the upper one with a tube attached, passing over and down upon the crown-sheet, for the purpose of showing when the circulation has begun. The two lower ones show the proper height of the water outside of the cylinder or casing around the tire-box. The dotted line is intended to represent the water-line. Fig. 2, showing a section of cylinder-boiler with furnace below, represents the tire-line up above the water-line, (which is the dotted line;) but as soon as the re is started the water will pass up between the inside easing and the boiler and How over at the top and continue to iiow, being supplied iu the middle, at the bottom, with water from inside the casing.

The operation is very simple. After the boiler has been supplied with water up to the second gage the tire can he started, which will cause the water to iiow up between the casing O and the lire-box A,falling over onto the crownsheet F. As soon as this has been covered the casing around the fire-flue will pick it up and pass itin small particles up around the fire-line, keeping it in contact with the heated surface until the greatest amount ofthe water will be turned into steam. rIhe height of the water on the outside of the cylinder has nothing to do with keeping the lire-surface covered. As long as the lower edge of the casingis covered with water so long will the tire-surface be covered. When there is heat enough to injure the iron in the boiler there is heat enough to keep up the circulation.

What l claim, and desire to secure by Let ters Patent, is-

l. The combination of the metal cylinder or casing around the fire-surface with the tirebox and a reservoir for a body of water upon the crown-sheet.

2. The combination of the fire-line and casing around it, when so arranged as to receive the water from the reservoir on the crownsheet and convey it upward in contact with the ue.

HENRY O. SERGEANT.

Witnesses JOHN S. HoLLINGsHEAD, JOHN S. HoLLiNGsHEAD, Jr.

Images