US23593A - Edward lynch - Google Patents

Description

UNITED- STATES PATENT OFFICE;V

EDIVARD LYNCH, OF WIASHINGTON,.DISTRICT OF COLUMBIA.

IMPROVEMENT -IN STEAMi-B'OILE'RSL.

Specification forming part of Letters Patent No. 23,593, dated April 12, 1859:

To all whom it may concern:

Be it known that I, EDWARD LYNCH, of the city of IVashington, in the District ot' Columbia, have invented a new and useful Improvement in Circulating Vater and Generating Steam in Boilers of Steam-Engines; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters and marks thereon.

My invention is more especially designed for the boilers of marine engines, though itis applicable to other boilers, to those of noncondensing as Well as of condensing engines.

In the boilers of marine engines, as also in the long-flue boilers of the high-pressure engine used on the Vestern Waters of this country, there is a water-space underneath the grate and ash-pit in communication with Water-spaces at the sides of the fire-box or furnace and the main Waterspace of the boiler. `Without resort to some unusual means the water in the space underneath the ash-pit Will have little or no circulation and the space will become the recipient of the saline, earthy, and other deposits. By' my invention the water in the space alluded to will have free and full circulation, and deposits therein be prevented.

My invention is designed, also, to aid materially in getting up steam in all large boilers, and to remedy the evil that occurs to marine-engine boilers by the expansion and contraction of the metal While the boiler is passing from the one to the other condition ot' use and rest.

My invention further is designed to make up the deficiency which occurs in the water of the boilers of marine engines.

Of the drawings forming part of this specification, Figure lis a front view of a main boiler and of an auxiliary boiler, and Fig. 2 a vertical sectional view of a main boiler having horizontal fire-tubes.

In both of the figures like letters refer to like parts.

The shell of the boiler is marked a., the smoke-stack b, the grate c, the ash-pit cl, the steam-space of the boiler e, the water-spacef, which is also indicated by blue coloring. The

body of the main boiler is marked G and the body of the auxiliary boiler H. In general construct-ion neither of these boilers differs from many in use. Y

It will be perceived that a piped is counected to the steam-space part of the auxiliary boiler H and to the main boiler below the ash-pit, thus making a communication between the steam-space of the auxiliary boiler and the water-spaces of the main boiler be- 10W the ashpit. Fig. 2 shows the pipe iperforated and passed to some extent in thewater under the ash-pit. The arrows in the blue part of Fig. l indicate the passage of steam through the perforations of the pipe. Cocks j and coupling-pieces k are shown at various parts of this pipe.

Ocean steamers usually have an auxiliary boiler and engine for general purposes. Sometimes the boiler is of the same size as the other boilers and is used for generating steam for the main or auxiliary engine, as circumstances may demand. The Steamers of the Vestern waters of this country usually have an auxiliary engine, called the donkey or doctor, and used commonly for. feeding Water to the main boilers of the engine. Both in the ocean and lVestern Steamers these auxiliary engines and boilers are kept in service when the vessel is at the Wharf or in doek, though at times more steam is generated in the auxiliary boiler than can be used by the engine. The steam in the auxiliary boiler is usually ot higher pressure than that in the main boilers, and when not so needed for ordinary purposes it can readily be so made to answer the purposes of this invention.

Through the pipe i the steam of the auxihf iary boiler can be passed into the Water-space belowT the ash-pit of the main boiler. This steam, passing through the perforations of the pipe into the Water, will necessarily produce an active circulation of the water in this space and prevent the accumulation of any sediment at this part ot the boiler. The water thus acted upon by the steam will have an upward motion given to it, and thus greatly aid in the early generation oi the steam when getting up steam. The steam thus passed into the main boiler from the auxiliary boiler in ocean Steamers having surface-condensers will fully make up for all losses of the water of the main boilers, and thus insure an ample supply of pure water to the main boilers. A

vessel leaving port with pure or fresh Water in her main boilers can arrive at her destination Without having rendered that Water Charged With alkaline or other matters, as the use of salt Water on the voyage can be limited entirely to the auxiliary boiler; and Where her arrangement of main boilers is sneh as allows of the use of one or the other of them as au auxiliary boiler, as circumstances may demand, the Water in'all the boilers can be as fresh and pure as when she started on the voyage. After arriving at port, or when in port, the steam from the auxiliary boiler can be made very serviceable in preventing the too rapid cooling down ot the main boilers on the putting out of their tires orin heating them up for any purposes.

In naval Steamers the passing into the Water-space of the main boilers the steam ofthe auxiliary boiler, as herein set out, can be substituted to a considerable extent for bank-V ing the fires under all circumstances and conditions where banking would be required.

Having thus fully described the eharaeter and the advantages of my invention, what I Claim as new, and desire to secure by Letters Circulating the Water and aiding the generating of steam in the main boilers of ocean Steamers by passing the steam from the steamspaee of an auxiliary boilerinto the Water of the water-space below the ash-pit of the main boilers, as herein set forth. y

' EDVARD LYNCH.

Witnesses:

T. T. EVERETT, F. S. MYER.

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