US495524A

US495524A - severy

Info

Publication number: US495524A
Authority: US
Publication date: 1893-04-18
Anticipated expiration: 1910-04-18

Description

(No Model.)

M. L. SEVERY.

STEAM BOILER.

Patented Apr. 18, 1893.

THE NOR ms PETERS (n, Pnmumu, wAsmNGmN. n. c.

UNITED STATES PATENT OFFICE.

MELVIN L. SEVERY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO FRANCIS DOANE, CHARLES F. CROWELL, AND MELVIN L. SEVERY, TRUSTEES,

OF SAME PLACE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 495,524, dated April 18, 1893.

Application filed November 10, 1892. Serial No. 451655. (No model.)

To all whom it may concern.-

Be it known that I, MELVIN L. SEVERY, a citizen of the United States, residing at Boston,in the county of Suffolk and State of Mas sachusetts, have invented certain new and useful Improvements in Steam-Boilers, of which the following, taken in connection with the accompanying drawings, is a specification.

In an application for Letters Patent of the United States for an improvement in apparatus for'the utilization of solar heat, filed simultaneously with this, I have described and shown a horizontal cylindrical steam boiler supported in the focus of a reflector, which reflector is given a movement angularly to the plane of the horizon in order that, in accordance with the apparent movement of the sun, the axis of the reflector may be constantly maintained parallel to the solar rays. It is obvious that, as the reflector moves from a nearly horizontal to a vertical position in following the apparent movement of the sun, the level of the water in the boiler relative to such boiler will constantly vary until the end of the pipe which opens into the space above the water in the boiler when the reflector is in a horizontal position will be car- 'ried below the surfaceof the .water in the boiler, and the passage of steam through the pipe to the steam chest will be thereby prevented.

The object of the first part of this invention is to provide means whereby communication between the steam chest and the space above the water in the boiler may be always maintained, notwithstanding these changes in the level of the water; and to this end the first part of my invention consists in the arrangement, substantially as hereinafter more fully set forth, of a series of pipes forming a communication between the steam chest and the steam space in the boiler.

The second part of my invention consists in the arrangement, as hereinafter more fully set forth, of a steam chest within the boiler.

The third part of my invention relates to a device for indicating the level of the water in the boiler as hereinafter more fully set forth;

In the accompanying drawings, Figure 1 is In the several figures, the same numerals refer to the same parts.

As described in an application for Letters Patent of the United States filed by me June 29, 1892, Serial No. 438,421, the boiler is surrounded by a covering of glass or any other material transparent to solar rays but opaque to the invisible dark heat rays radiated from the surface of the boiler, which covering is separated from the boiler by an air space. This construction is claimed in the before mentioned application, and is, therefore, not claimed in this application.

Referring to the drawings, 4 is the cylindrical steam boiler; 3 is the covering for the same, of glass or of any other material which is transparent to the solar rays but opaque to the invisible dark heat rays radiated from the boiler.

1 and 2 are the plates which form the ends of the cylindrical boiler and covering cylinder.

12 is a hollow cylinder arranged within the cylindrical boiler concentrically to the same and secured in any suitable manner, as by means of the bolt 13; this forms the steam chest, and communicates with the steam cylinder by a pipe 10, which is covered with a non-conducting material from the point where it emerges from the covering 3. The water in the boiler should be normally maintained at such a height that it will just cover this steam chest, as shown in Figs. 3 and 4.

5, 6 and 7 are a series of pipes which form communication between the steam space in the boiler and the steam chest, and extend through the air space between the covering 3 and the boiler 4, so that they are enveloped by this covering. The points of entrance of these pipes into the boiler are arranged so,

that the opening of the pipe 5 into the boiler s about ninety degrees distant from the openmg of the pipe 6 and the opening of the pipe 7 is at a point about midway between the openings of the pipes 5 and 6. It will be seen from Figs. 3 and 4 that by this arrangement as the boiler rotates on its longitudinal axis, as before stated, communication between the steam in the boiler and the steam chest is always maintained, notwithstanding the changesin the level of the water relative to the pipes, for the reason that when the opening of the pipe 6 is below the level of the water, as shown in Fig. 3, the openings of the pipes 5 and 7 are above the level of the water, as shown in Fig. 3, but that when the opening of the pipe 5 is below the level of the water, the openings of the pipes 6 and 7 are above the level of the water, as shown in Fig. 4. Other pipes opening into the steam space in the boiler between the openings of the pipes 5 and 6 may be provided, but one pipe 7 will generally be found sufficient, as with this arrangement there will sometimes be three pipes opening into the steam space, and always two.

By placing the steam chest within the boiler, I obtain economy in the utilization of the heat applied to the boiler, for the reason that no heat is wasted by radiation from the steam chest, and there is a less bulk of water to be heated in the boiler relative to the exposed surface, than if the steam chest were arranged in the usual manner.

The arrangement of pipes described is not provided with two or more steam eduction pipes each leading from points on the interior of the boiler varying angularly with respect to its axis of rotation whereby one or more of said pipes may be cut 0E or submerged on rotation of the boiler without intercepting the remainder of the pipes, substantially as set forth.

2. Asteam boiler provided with two or more steam eduction pipes each of which is located at points varying angularly with respect to a horizontal axis of the boiler, and a steam chest contained within the boiler, the said pipes communicating with the steam chest, substantially as described.

3. The combination, substantially as and for the purpose set forth, with a horizontal cylindrical steam boiler, of a cylindrical steam chest arranged within the steam boiler concentrically thereto, of a pipe forming a communication between the steam chest and the steam space in the boiler and extending from the surface of said boiler, another pipe also extending from the surface of the boiler and forming a communication between the steam chest and the steam space in the boiler, the said pipe opening into the boiler about ninety degrees from the opening into the boiler of the first named pipe, and one or more other pipes extending from the surface of the boiler and forming a communication between the steam chest andthe steam space in the boiler midway between the first named pipes.

4. A horizontally rotatable steam boiler, a steam chest, and a curved transparent tube for indicating the amount of water in the boiler arranged transversely to and having the center of its curve substantially co-incident with the axis of rotation of the boiler, substantially as shown and described.

In testimony whereof I have hereunto subscribed my name this 7th day of November, A. D. 1892.

MELVIN L. SEVERY.

Witnesses:

D. W. ALLEN, CHAS. A. KELLOGG.