US596979A - Boiler - Google Patents

Description

(No Model.)

T. G. BRITTON. BOILER. No. 596,979. Patented Jan. 11,1898.

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THOMAS G. BRITTON, OF LOUISVILLE, NEBRASKA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 596,979, dated January 1 1, 1898.

Application filed December 31, 1896. erial No. 617,586. (No model.)

To all whom, it may concern:

Be it known that I, THOMAS G. BRITTON, a citizen of the United States, residing at Louisville, inv the county of Cass and Stateof Nebraska, have invented certain new and useful Improvements in Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in boilers, and has for its object the production of a device of this class in which the water is brought into direct contact with the products of combustion and, afterbeing converted into steam, is mixed with the gases liberated by combustion and is directed to an engine or other device for the conversion of its potential energy into kinetic power.

To the accomplishment of the foregoing object my invention consists in providing a combustion-chamber upon the interior of a boiler and in directing the gas liberated by combustion within the chamber to the interior of the boiler below the surface of the water and in certain other novel features subordinate to the general arrangement specifi ed and hereinafter described.

Referring to the drawings, Figure 1 is a central longitudinal view of my device complete, and Fig. 2 is a central longitudinal section through the boiler thrown into perspective and showing the mechanism upon the interior of the boiler in perspective.

Referring to the numerals on the drawings, 1 indicates a horizontal cylindrical boiler provided with a steam-dome 2 and a safety or pop valve 3, as usual.

4 indicates the feed-water pipe communicating with the boiler, preferably adjacent to its bottom, and 5 the feed-pipe leading from the dome 2 to an engine or other similar de vice. (Not illustrated.) lVithin the boiler and preferably near its bottom I provide a comparatively long cylindrical combustionchamber 3 of considerably less diameter than the diameter of the boiler and extending from its front end 7 to a point adjacent to its rear end 8.

9 indicates an enlarged air-pipe piercing the front end of the boiler and communicating with the interior of the combustion'chamher and preferably provided with a hinged cap 10 and having suitable connection through an air-tube 11 with a source of compressed air. (Not illustrated.) I prefer to employ an air-pump designed to supply air under pressure to the interior of the combustionchamber.

12 indicates a fuel-pipe leading into the combustion-chamber, preferably at a point immediately above the air-pump 9, and con nected with a convenient source of oil, gas, vapor, or other fuel supply.

13 13 indicate a pair of what I will call injector-pipes, extending along either side of the exterior of the combustion-chamber, having their front ends closed, as by caps 14, and connected at their rear ends by a transverse pipe 15, communicating with a depending pipe 16, controlled at its point of connection with the transverse pipe 15 by a checkvalve 17, as illustrated.

18 indicates the injector supply-pipe piercing the rear end or head of the combustionchamber and communicating with the depending'pipe 16, the injector supply-pipe being controlled by an injector supply-valve 19, operated by a hand-wheel 20 upon the exterior of the head 8 of the boiler and connected to the valve, as by a screw 21.

The valves 1'7 and 19 are preferably hollow, as illustrated, for the purpose of permitting the water within the boiler to fill their interior and prevent their burning out when subjected to high temperature.

22 indicates an escape-pipe piercing the top of the combustion-chamber, preferably near its rear end, and extending upwardly through the boiler, above which it is provided with a safety-valve 23 and with an escape-valve 24c, controlled by hand-wheel 25.

The water within the boiler having been raised to a sufficient level to completely envelop the combustion-chamber 6, the cap 10 is opened and the fuel emitted from the pipe 12 is ignited, access to the interior of the combustion-chamber for this purpose being had through the air-pipe 9. The cap 10 is then closed and securely locked, and the fuel and air are fed under suitable pressure to the interior of the combustion-chamber. The temperature of the chamber 6 will be raised and will heat the water within the boiler sufficiently to generate steam; but in order to assist further in such generation and to charge the steam with expansible gases the cook 20 is opened, and the gases liberated within the combustion-chamberescape into the injectortubes 13, whence they are injected into the body of water at a pressure sufficiently high to prevent the entrance of water from the boiler through the apertures in the injectortubes.

In order that the air and fuel supply will be coincident, any suitable mechanism may be provided for automatically cutting off the fuel-supply when the air-supp1y ceases, or vice versa, and I have illustrated and described one form of mechanism for accomplishing this result.

26 indicates a valve in the air-tube 11, controlled as by a hand-wheel 27 and having its spindle or plug independently connected with the spindle or plug of a valve 28 in the fuelpipe 12, as by a lever-and-link connection illustrated and well known in the art.

It will be observed that the fuel and air must be forced into the combustion-chamberunder a pressure in excess of the internal ressure of the combustion-chamber and that the gases injected into the water of the boiler must be under a higher pressure than that within the interior of the boiler.

By means of the construction and arrangement described I am enabled to generate steam within a boiler by direct contact between the water and combustion-chamber and am at the same time enabled to inject into the body of water expansible gases which when commingled with the steam serve to augment its potential energy.

I do not desire to limit myself to the details of construction herein shown and described, but reserve to myself the right to change, modify, or vary them at will within the scope of my invention, as it is evident that various modifications might be made with practical results, the essential characteristics being, first, the injection of expansible gases into the boiler from the combustion-chamber, and, second, in locating the combustion-chamber in the boiler, and in certain other peculiarities. of construction and arrangement not necessary to be mentioned in detail.

I claim- 1. The combination with a boiler and combustion-chamber therein, of means for supplying fuel under pressure to the combustionchamber, a valve-controlled escape-pipe communicating with the said combustion-chamber and extending to the exterior of the boiler,

and a plurality of valve-controlled injectortubes extending longitudinally within the boiler and provided with perforations throu gh their under sides exclusively, whereby the gases'injected into the contained water will be forced to penetrate to the bottom of the boiler before escaping to the steam-space at its top, substantially as specified.

2. The combination with a boiler and combustion-chamber therein, of an oil-pipe and an air-pipe extending upon the exterior of the boiler and communicating with the combustion-chamber, interdependent valves in said pipes, a plurality of perforated injector-tubes extending longitudinally with respect to the boiler and communicating with one end of the combustion-chamber, a valve controlling the said tubes, and a check-valve intermediate of the injector-tubes and controllingvalves, substantially as specified. 3. The combination with a boiler and combustion chamber therein, and perforated valve-controlled injector-tubes communicating with the combustion-chamber, of an enlarged air-pipe piercing the front of the boiler and communicating with the interior of the combustion-chamber, a hinged cap closing the end of said air-pipe, an oil-supply pipe com municating with the combustion-chamber from the exterior of the boiler, an air-supply pipe communicating with the enlarged airpipe, and interdependent valves in the airpipe and oil-pipe respectively, substantially as specified.

4. The combination with a boiler, and a combustion-chamber therein, of perforated injectortubes extending from one end to the other of the combustion-chamber and adjacent to its top,an injector supply-pipe piercing the rear end of the combustion-chamber and provided with a controlling-valve, a valve-controlled pipe extending at right angles to the injector supply-pipe and communicating at its upper extremity with each of the injector-tubes respectively, air and fuel pipes piercing the opposite end of the combustion-chamber and extending upon the outside of the boiler, means for supplying air and fuel under pressure to said last-named pipes and interdependent valve located in said pipes, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

THOMAS G. BRITTON.

W'itnesses:

MAURICE BEHAN, ALFRED L. RHODES.

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