US662472A - Steam-generator. - Google Patents

Description

No. 662,472. Patnted Nov. 27, I900.

R. M. SHAFFER.

STEAM GENERATOR.

(Applicafion filed Mar. 1, 1900.)

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UNITED STATES IQEu RICHARD M. SHAFFER, OF BALTIMORE, MARYLAND.

STEAM-G EN ERATOR.

SPECIFICATION forming part of Letters Patent No. 662,472, dated November 27, 1900. Application filed March 1, 1900. Serial No. 6,912. lNo modelJ T0 ctZZ whom it may concern:

Be it known that I, RICHARD M. SHAFFER, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

This invention relates to improvements in steam-generators; and some of its objects are to produce steam quickly, to provide a perfect and rapid circulation, to increase the heatingsurface, and to construct the device in a simple and compact form.

The invention is especially adapted for use on automobiles and motor-cycles wherein a minimum of weight and space are among the chief requisites.

With these objects in view the invention is illustrated in the accompanying drawing, in which the device is illustrated by a vertical longitudinal section through my improved generator.

In the drawing, A designates the Water-receptacle, which in the present instance is annular in form and having an outer circular wall a and an inner circular wall a and a centralpassagefiwhich extends upward throughout its length. A water-supply pipe 0 enters the generator at the bottom and a steam-pipe d leads from the generator at the top. The water-supply pipe 0, it will be seen, before entering the generator is formed into two vertical parallel pipes c by being bent double at 0 and said parallel pipes extend up in the central passage B nearly to the top of the generator. The lower end of one of these pipes has a connection 0 with the bottom of the generator. It will thus be seen that before water can enter the generator it must pass up one of the parallel pipes c in the central passage and down the other, and thereby receives a preliminary heating. A suitable oil or gas burner Z is secured at the bottom of the center passage B. This passage therefore is the fire-box. A number of curved tubes 6 occupy the center passage. One end of each tube enters the inner wall a near the bottom and thence curves outward toward the opposite side of said wall and then upward and curves back again and enters the Wall a near the top water-line. It will be seen that a tube 6 from one side of the wall a overlaps in the center passage the tube from the other side of the wall. By this construction it will thus be seen that all the curved tubes 6 pass each other in a central vertical line in the center passage B. In the present instance I also provide inclined tubes f, which extend crosswise through the passage B and the ends of which pass through the wall a and project into the generator. All these tubes are circulating-tnbes.

Near the top of the generator and above the water-line are horizontal cross-tubes or superheatingtubes 9 g, which also extend across the center passage B and enter the Wall ct of the generator.

A circular shell H surrounds the sides and covers the top of the generator A and. also covers the top of the central passage B and forms a hot-air space i all around the sides and top. The shell H is open at the bottom.

The operation is as follows: The gas or oil from the burner is first lighted to heat the tubes in the central passage B and also to heat the parallel water-pipes c. The water-supply is then turned on and the Water passes through the pipe cand up one of the parallel pipes c and down the other parallel pipe to the pipe 0 and thence into the generator. By th usdirecting the cold feed-water up and then down through the hot pipes in the central passage B the water is delivered into the generatorin an already-heated condition, and when the generator is sufiiciently filled the Watersupply may be shut-oil. In this condition the curved tubes 6 and inclined tubesfare all filled with water, and the flame and heat from the burner will play on all the tubes and will be deflected against the Wall ct of the generator and continue up through the passage B, and the current of hot air from the flame will be deflected at the top by the shell H and caused to spread over the top and down around the outside of the walls a of the generator in the space 'i, and finally be carried off at the opening at the bottom. By this construction it will be seen that heat is applied to the water in the generator through the tubes in the center passage and on the inside at top and also on the outside wall a, thus producing a rapid circulation of the water and a quick generation of steam.

Having thus described my invention, what 4 an annular-shaped Water-receptacle having a central passage; a plural number of tubes in said passage and communicating with the interior of said water-receptacle; and a shell surrounding the-sides and top of said Waterreceptacle and covering the top of said cen-' tral passage but open at the bottom.

' 2. The combination in a steam-generator of an annular-shaped water-receptacle having a central passage; a plural number of tubes, 6,

in said center passage and having their ends entered in the inner wall of said receptacle and curved outward toward the opposite side of said wallsaid tubes overlapping each other at the center of said vertical passage; and a shell surrounding the sides and top of said water-receptacle and covering the top of said central passage but open at the bottom.

3. The combination of a generator having a central vertical passage; a plural number of tubes in said passage and entered in said generator; a shell surrounding the sides and covering the top and said central passage of said generator but open at the bottom; a Watersupply pipe passing through said central passage before entering the generator.

4:. In a steam-generator, an annular or cylindrical water-receptacle having a central.

passage open at the top and bottom, and a shell surrounding the sides and top of said water-receptacle and being closed at its top and side and open at the bottom, the central passage of the Water-receptacle being in communication with the interior of the shell.

5. In a steam-generator the combination with the waterreceptacle provided with a central passage extending throughout its length and open at the top and bottom, a water-supply pipe passing upwardly and in a returned direction through said central passage and entering the water-receptacle at the bottom thereof, and a shell surrounding the top and sides of the Water-receptacle, the central passage of the water-receptacle being in comlnunication with said shell.

6. .In asteam-generator, the combination of a'cylindrical oraunular Water-receptacle provided with a passage extending therethrough, said passage being open at its top and bottom, a series of pipes extending in various di-- rections across said passage and opening into the Water-receptacle, a Water-Suppl y pipe extending into the said passage at the bottom thereof, up through the passage and in a returned direction down through the same and opening into the Water-receptacle at the bottom thereof, and a shell surrounding the water-receptacle atthe sides and top and provided with an open bottom.

In testimony whereof I aflix my signature in the presence of two witnesses.

. RICHARD M. SHAFFER. Witnesses:

CHARLES L. VIETSOH, WM. H. J ONES.

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