US653246A - Sectional boiler. - Google Patents

Description

No. 653,246. Patented July I0, 1900. .1. KEITH.

SECTIONAI. BOILER.

(Application-filed Nov. 14, 1899.)

2 SheetsSheet I.

(N0 Model.)

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No. 653,246. Patented My ID, I900. J. KEITH.

SECTIONAL BOILER.

(Application filed Nov. 14, 1889.)

2 Sheets-Sheet 2,

(No Model.)

IN 115N708 WITNESSES.

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UNITED STATES PATENT OFFICE.

JAMES KEITH, OF LONDON, ENGLAND.

SECTIONAL BOILER.

SPECIFICATION forming part of Letters Patent No. 653,246, dated July 10, 1900. Application filed November 14, 1899. Serial No. 736,979- (No model.)

To all whom it may concern:

Be it known that 1, JAMES KEITH, a citizen of the United Kingdom of Great Britain and Ireland, residing at 27 Farringdon avenue, London, England, have invented certain Improvements in Sectional Hot-Water Boilers, (which has been patented in Great Britain on the 21st day ofApril, 1899, No. 8,368,) of which the following is a specification.

This invention relates to sectional hot-water boilers for use chiefly in heating buildings by circulation of the heated water through piping; and it has for its object to provide, in combination with such boilers, a separate fu rnace or fuel-chamber preferably having auxiliary water-heating surface and so arranged that the main boiler is heated by the firegases passing through it from the fuel-chamher and impinging upon its heating-surfaces.

The invention is illustrated by the accompanying drawings.

Figure l is a vertical section, and Fig. 2 a plan, of the improved sectional hotwater boiler. Fig. 3 is an elevation in section of the boiler shown in Fig. 1, but showing a modified form of the furnace portion of said boiler. Fig. 4 is a detail View.

The main portion A of the boiler is preferably of the vertical sectional type described in the specification of my British Patents Nos. 2,709 of 1879 and 5,744 of 1885; but it may be of the horizontal formation described in the specification of my British Patent No. 3,013, of 1887,0r of other type; but in each case the fire-grate is removed and a closed gas-combustion chamber B takes the place of the f uelspace, the said chamber B being surrounded by fire-bricks B and having a fire-brick bottom B Alongside of the main boiler A is fitted an auxiliary water-heater 0, containing the fuel-chamber D or magazine, the said heater being either made in a single piece and tapered, as shown at Fig. 3, or in sections with parallel sides corresponding to those of the main boiler A, as shown at Fig. 1, and so formed that the fuel is inclosed centrally by a water-jacket O. The fuel is fed in at or near the top through a doorway E and rests on a rocking or other firegrate F, fitted in a hollow base G at the bottom. The fire-gases instead of passing through the 'body of fuel in the fuel-chamber D are led through a passage or flue H, which is fitted to connect the aux iliary heater 0 to the main boiler A and pass into the combustion-chamber B, whence they ascend and, after parting with their heat by impinging against the heating-surfaces of the boiler A, escape by a chimney-I at the upper or farther end of the boiler. The water space or jacket 0 around the fuel-chamber D is connected to that of the boiler A or to the main flow and return pipes from boiler byseparate flow and return pipes J K, as shown at Figs. 1 and 2. The heater 0 instead of being connected as above described may have its upper and lower ends connected by a separate flow and return pipe, as shown at Fig. 3.

The boiler proper, A, is heated solely by the hot gases from the fire in the fuel-chamber D or magazine of the auxiliary heater 0, and thus contact of fuel and formation of ash in the main boiler A is avoided, while as combustion in the fuel-chamber D is downward and the draft through the fire-bars and lower part of the fuel and in the main boiler A is upward perfect combustion is insured, as well as economy in fuel and absence of smoke. The separate magazine 0 may also be of such dimensions that firing once a day may suffice. The said magazine may be formed without having the waterjacket around it and without the accompanying circulating-pipes mentioned.

The sections A of the main boiler A above the combustion-chamber B are or may be all formed with cross-tubes A to provide a maximum of heating-surface, and access to these for cleaning may be had by providing the usual doors in the sides of the boiler. Olinker and ash doors L M are also provided for the furnace or fire grate of the auxiliary heater G, and air-registers N may also be provided in the general base for regulating the admission of air to the fire-grate through the boilerbase. The air-register N or registers may be opened or closed by hand or it or they may be automaticallyoperated through mechanical devices acted on by the rising and falling of the temperature of the water or of the air of the apartments heated by the boiler.

In each of the sections A two orifices A A are formed at each corner to permit of the passage of water from one section to the other, one of these, A beingin the upper wall and the other, A, in the lower wall of each section and each corner pair being exactly opposite each other. The upper orifices A are formed with lips A or are otherwise suitably formed so that the jointing of one section to the other may be made water-tight by the insertion at this point between the sections of i a metallic or other packing ring. A bolt A is passed down through each of the corner orifices, and nuts A are strung on these bolts to be on the uppermost and lowermost sections A and draw the whole together, these latter sections having their outermost orifices, which are covered by the nut upon the In a hot-Water boiler, the combination of a main boiler composed of a series of watercontaining sections joined together and inclosing a central combustion-chamber having a fire-brick bottom, each section having its Water-space connected to that of its neighbors and an auxiliary water-heater or furnace connected thereto by a fire-brick passage, and composed of a single or a series of water-containing sections similarly jointed and inclosing a central fuel-space provided at its upper end with a firing-door and at its lower end with a fire-grate, the main boiler and auxiliary heater having the water-spaces of their highest and lowest sections connected together by flow and return pipes respectively.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

J AMES KEITH.

Witnesses:

WALLACE FAIRWEATHER, J NO ARMSTRONG, J unr.

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