USRE2057E - Improvement in steam-boiler furnaces - Google Patents

Description

.jlkldllj itomv'it may con/cern:v y Be it `known that I, JONATHAN AMonY, of

exact description of the construction and opcalled,which inclose the combo stioncharn bers,

Vthe constructing or" the curves of metal and JONATHAN Amour, or WEST PATENT OFFICE.

ROXBURY, MASSACHUSETTS.

IMPROVEMENT 1N 'sTi-:AwBouEPc FuaNAoEs.

Specilication forming part of Letters Patent o. 23,650, datedl April 1 9, 1859; Reissue N0. 2,057.. dated l August 29, 1865,. v

fest Roxburyin the county of Norfolk and State of Massachusetts, have invented certain new and usefulrlmprovements in 'the Construction of, Furnaces -for SteamBoilers 'andA other Similar Purposes; and I do hereby declare that the following is a full, clear, and

eration thereof, taken in connection with the accompanying drawings, making apart ot' this specification, inwhichi Figure 1 is a longitudinal sectional eleva tion 'ot' a locomotive-boiler with the` improve-- ments applied thereto; Fig. 2, a transverse section through the `tirebox, showing` the 'lire curves in elevation.

The letters ot reference in all the figures.

Myin'vention consists in certain mo'dilications of what is known as Bakersfurnace, for which Letters Pat-ent were granted to Henry F. Baker, May 30, 1846, by means of which the combustion of the fuel therein :is better effected, and the invention is better adapted to be used in locomotives and' for other boilers having internal lire-places, and to other similar conditions of use.

rlhe lirst part of my invention relates to the i manner of constructing the curves,7 so

`indicate like parts and consists in constructing that part of the. curves toward the tire-place by continuing the curve upward and forwardso as to make the curve terminate in a thin overhanging projection, which, in. connection with the other parts of the curve, serves to insure a more perfeet rotation or eddying of the gases from the tire-place in said chamber, so that in connection with the orifices for the admission of air in said curves a more Aintimate mixing of the air with the gases is ettected, and being thusv mixed they are so presented to the incoming currenlt ofilame as to insure their complete combi stion. i

The second part. of my invention relates toA the employment of th em for heating the air'to be thrown into the combustion-chamber, as before explained.' v

In the construction of the curves of locomotive-boilers, as showfi in the drawings, they i must necessarily be made of metal, both from the less space occupied than would be it' bricks were used, fory lsecurity against being dcstr'oyedby the jostling ot' the locomotivev in running over theinequalitie's of` the road, and also for the reason that-they 'can be more: ctmxvcnientlyl connected with theboiler.,` But unless the metal' curves were in some way protected from the tierce heat of the dame from the tire-place, lor more especially on that side next to the tire-place, they would be destroyed ina few hours. To prevent this resuit, and at the same time to heat the air to be thrown into the combastion-chamber, I make the space or chamber behind the curves the heater, and by so bringing in the current of air as to throw the currentv against thel most heated side ofthe chamber, which, by rapidly absorbing the heat, keeps the metal i so cool as to preserve it while the air is heated! 'i admitted through the holes a c1. a., as shown g but at the opposite extremity, E, it is"`mnde `With an'internal curve, d, uniting,` with the iii-'- ternal curve in a horizontalposition, forming' an overhanging prqiectioinas shown in thc drawings at e, over which, externally, thc products of combustion from the iire-placearc guided, so as to insure the formation ot' an eddy or vortex within the combustion-chain ber, for the purpose to be hereinafter described.

Between the interior and exterior curves at e is a long narrow aperture, eXtendin the whole breadth of the curves, through which the air Ipasses into .the combustion-chamber.

5 This serves both' to protect the thin extrenii i ties of the'curves 'from the intense heat of the flame as it comes from thctire-chamlwr, and

gases passing over it. The uir is supplied to the outer part of the volume through the holes n u, die., in the other extremity ot' the curve,

whiehalso protects that' part of the curve from the extreme heat. Baker furnace, before. mentioned, they are In the curves of the .shown in the patentot such form as to cause n distributes the air evenly to thel volume of l placed, which occupies the space usually occupied by the tubes.

The operation or the improvements are believed to be sufficiently7 obvious from the drawings and description, and may be considerabl)r modified in form Without changing the principles.

` The two tliingsintended to beaccomplished bythe improvements are,1'irst, to give such y a direction to the current passingthrough the the eddy is to revolve in the opposite. direction.

and insure the more perfect formation .of the eddy, by the action `ot' which the intimate mixture of the 'air with the gases is effected-to adapt them to complete combustion. The air is admitted into the heating-chamber through the pipe G, extending forward ot the boiler, beingv forced in bythe draft, and also by the My improvement in the form of the,l curve is designed to curr)Y out 'that principle progressive movement of the engine; but it maybe admitted at any other part, as at I,

provided the currents are thrown upon 4the more heated par ts to protectthem.

His the tubes, constructed in the usual Way, except that the5T are shorter and extend only to the recess in which the curves are tecting' them by the current' of lcool air, substantially as described.

What l claimas my invention, and desire to` secure by Letters Patent, is A l rlhe method of increasing the combustion and protecting the combustion-curves, substantially as dcscrib ed..

In testimony whereof I have signed my name to this specification before two subscribl.

ing` witnesses.

JONATHAN AMORY'.

Witnesses: J osEPH G AVETT,

A. PoLLoK.

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