US147014A - Improvement in feed-water heaters for locomotives - Google Patents

Description

l P' MAGON' ZSheets--SheetL Feed-Water Heaters for Locomotives.

N0.47,0]4. PatentedrFeb.3,874.

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2 Sheets--Sheet 2.

l. P. MAGUON.

Feud-water Heaters for Locdmotives.

Patented Feb. 3,1874.

UNITED STATES PATENT @Prion ISR-AEL I. MAGOON, OF ST. JOHNSBURY, VERMONT, ASSIGNOR TO CHARLES A. SIIAW, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN FEED-WATER HEATERS FOR LOCQMOTIVES.

Specification forming part of Letters Patent No. 147,014, dated February 3, 1874; application filed December 11, 1873.

To all whom it may concern:

Be it knovvn that I, ISRAEL F. MAGOO'N, of St. J ohnsbury, in the county of Caledonia, State of Vermont, have invented a certain new and useful Improvement in Locomotive Steam- Engines, of which the following is a description. sufficientlyT full, clear, and exact to enable any person skilled in the art or science to which my invention appertains to make and use the same, reference being had to the aceompanying drawings, forming a part of this specification, in Which- Figure 1 is a front elevation of the smokebox and a section of the stack of my improved engine. Fig. 2 .is a longitudinal sectional view of the same. Fig. 3 is a transverse sectional view, showing the collar on the smoke-pipe. Fig. 4. is a transverse sectional view, showing the top of the insulator. Fig. 5 is a side elevation of the stack. Fig. (i is a vertical section of the stack.

Like letters refer to like parts in the different gures of the dravving.

My invention relates more particularly to that class of locomotive steamengines in which the feed-Water is heated, between its exit from the pump and its entrance to the boiler, by means of the exhaust steam; and consists, tirst, in astrainer introduced into the branch exhaust-pipe, by means of which cinders are prevented from entering the closed steamchamber or insulator; secondly, in a nevv construction of the stack, by which better facilites'are afforded for obtaining`l access to the feed-Water pipe, and rcliairing the bonnet, and, thirdly, in a new arrangement ot' the exit-pipe through which the waste steam passes from the heating-chamber, by which said steam is prevented from being condensed in the stack, and eindcrs are prevented from being drawn into said chamber through said pipe, all as hereinafter more fully set forth.

On the 25th day of July, 12-371, Letters Patent, numbered 117,308, were granted to me for improvements in locomotive steam-engines, to which patent reference is had.

Ink said patented engine, the feed-Water, or Water with Which the boiler is supplied, is heated, as it passes through the coils of the feed-Water pipe disposed in the stack of the locomotive, by means of the exhaust steam supplied through a branch pipe, designated in said patent as I, and which is taken from or leads out of the main exhaust-pipe, designated in said patent as K.

In the use of said patented invention, I have found that the cinders fromthe smoke-box and pipe fall or are drawn into the nozzle of the main exhaust-pipe, and are thence forced, through the branch pipe of the same, into the heating-chalnber or insulator surrounding the feed-water pipe in the stack, by which said pipe becomes in time coated, and the chamber partially filled with such cinders, thus rendering the heating of the water contained in the pipe in said chamber less rapid and effective.

My present invention obviates these difiiculties and objections, as Will be readily understood by all conversant with such matters.

In Fig. 1, A is the smoke box or arch B, the main exhaust-pipe, into which the exhaustpipes from the respective cylinders discharge; O, the nozzle of the main exhaust-pipe, and M a section of the eduction or smoke pipe. In Fig. 2, B is the main exhaust-pipe; C, the nozzle of the same; F, a branch exhaust-pipe leading from the main exhaust B, and provided with the nozzle E. In the pipe B, I place a convex strainer, D, extending entirely across the .aperture of the pipe, and fastened in position by the bolts which hold the nozzle C. I also place a convex strainer, G, in the branch pipe F, extending entirely across the aperture of the same, and being held in position by the bolts which secure the nozzle E; but the strainer l) may be dispensed with without departing from the spirit of my invention. It will be understood that the main exhaust-pipe B discharges steam, through the strainer I) and nozzle O, directly into the chimney M, to promoteor accelerate the draft ofthe same, ivhile the branch pipe F discharges steam through the strainer G, nozzle IG, and a pipe (not shown) which is iitted steam-tight to said nozzle, into the heatingchamber in the stack containing the coils of feedwater pipe, as described in said patent of In engines which are provided with a main and branch exhaust -pipe, but not with Aa strainer, or in. such engines as are described in said patent ot' 1871, a quantity of cindcrs will full into the nozzle C and upper part of the main pipe B, when the steam is shut oft', and a vacuum created in the cylinders, which cinders are liable to be blown or forced through the branch pipe F into the insulating-chamber, in which the coils of feed-water pipe are disposed in the stack of the engine, and thus to clog and lill up the same, and prevent the proper heating of the Water. When the strainer D is used in an engine provided With a branch pipe, F, the strainer Gr is of great utility in preventing the ner cinders and carbonaceous particles which may find their Way through .the strainer D from entering the heatingchamber or insulator in the stack, and should always be used; but if the strainer D is not used, it is very essential to employ the strainer G. In Fig. 5, I is the body ot' the stack; J, the bonnet; and P, the outletpipe for Waste steam, which leads from the top of the heatin g-chamber Within the body I. rIhe sections ot' the stack are securely fastened together by screw-bolts passing through the thimbles or eyes c d, which are attached to the outside of the sta-ck, as shown. The chimney M, Fi fr. 1, is extended upward to the bonnet J, as shown in Fig. 6, and is provided, near its upper end, with the iiange or collar K, Fig. 3, having the bolt-holes :1: x, to which iiange the head z, Fig. 4, of the insulating-chamber L, Fig. 6, is bolted through corresponding bolt-holes x fr, Fig. 4t. The exit-pipe I) discharges the waste steam from the chamber Il, which, it will be understood, corresponds with the chamber II in said patent of 1871.

The stack of a locomotive steam-engine as ordinarily constructed is arranged to take apart or be separated on the line on, Fig. 5, or at the largest part of the bonnet. This construction renders it difcult to obtain access to the chamber When a feed-Water-heating apparatus is located in the stack; and as a large number of bolts are required to secure the tWo sections of the bonnet at that point, and these bolts have to be removed before the upper section of the bonnet can be taken oft, it' this has to be done with the whole bonnet in place on the engine, the operation is diiiicult. To obviate this I construct the stack with a joint at r, Fig. 5, so that the stack is divided transversely immediately at the top of the heating-chamber II, Fig. 6, and so that the whole bonnet can be removed by taking out the bolts in the eyes c d without dividing it at m, in the usual manner.

As I propose to make the chamber II, constructed substantially as shown in Fig. 0, the

subject ol" other Letters Iatent, l do not herein claim the saine when in and of itself considered.

On the 29th day of March, 187 0,` Letters Patent of the United States, numbered 101,287, were also granted to me for certain improvements in locomotive steam-engines, in Which a feed-Water-heating apparatus is described. I therefore do not herein claim anything already securedv to me by said pate-nt of 187 0, or said patent of 1871, nor anything shown and described therein, and not so securechwhen in and of itself considered.

I am also aware that Letters Patent of the United States Were granted to one Ebbert, May 5, 1857, numbered 17,208, for a certain improvement in locomotive steam-engines, in which an exit-pipe is described, leading from the 'feed-Water-heating insulator or chamber 5 but said exit-pipe does not discharge the Waste steam directly into the open air, but into the stack, Where it passes out in a circuitous manner, mixed with the smoke of the engine. The objection to such an arrangement ot' the exitpipe is that the steam which it discharges condenses and produces a Wet stack, causing the cinders to adhere to the interior and clog up the same. Another objection is, that when the steam is shut oit a partial vacuum Will be formed in the closed steam chamber or insulator, and the air will be forced through the exit-pipe to supply or fill said vacuum, carrying with it the cinders from the smoke-stackan objection Which is entirely obviated by my arrangement of said pipe. It also renders it difficult to remove the bonnet of the stack and gain access to the heater as readily as in mine. I therefore do not claim anything shown or described in the patent of said Ebbert when in and ot' itself considered, but

that I do claim is- 1. The combination of the branch exhaustpipe F, provided with the strainer` G, with the closed steam-chamber H, substantially in the manner and for the purpose described.

2. In a locomotive steam-engine, the stack I, constructed with the joint c, arranged, in relation. to the closed steam-chamber H, substantially in the manner and for the purpose set forth and described.

3. In combination with the chamber II, the exit-pipe I),arranged substantiallyin the manner set forth and speciiied.

Subscribed December 8, 1873.

1S tAFiL I). MAGOOX.

\'\'itnesses:

CHARLES Ln'r'rs, II. E. MEroALr.

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