US485190A - C norrls peters co - Google Patents

Description

(No Model.)

A. GRAF. HEATER.

No. 485,190. Patented Nov. 1, 1892.

m: NORRIS Pmws on Pno'rauma. WASHINGTON, n. c.

UNITED STATES PATENT OEEIcE.

ANTON GRAF, OF GEORGETOWN, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO STEPHEN OSGOOD, OF SAME PLACE.

HEATER.

SPECIFICATION forming part of Letters Patent No. 485,190, dated November 1, 1892.

Application filed June 6, 1892. Serial No. 435.621. (No model.)

To all whom it may concern: the dome. A manhole leads into the top of Be it known that I, ANTON GRAF, of Georgethe box D. The furnace-front is provided town, in the county of Essex, State of Massawith the usual doors 2 5 Above the grate chusetts, have invented certain new and useb and the top y of the wall g a series of U- 5 ful Improvements in Heaters, of which the shaped pipes 11 are secured in the top h of following is a description sufficiently full, the fire-box by check-nuts l5. (Shown in Fig. clear, and exact to enable any person skilled 3.) Both ends of said pipes open within the in the art or science to which said invention dome C. At the mouth of the flue 7s a box appertains to make and use the same, refer- 16 is mounted in the furnace, said box hav- 6o [0 ence being had to the accompanying drawing a discharge-nipple 17, opening above the ings, forming part of this specification, in coil E. This box is designed to contain any Which oxygen-producing compound-as, for exam- Figure l is a side elevation, partly in secple, permanganate of potash, black oxide of tion, of my improved heater; Fig. 2, a front manganese,,or other similar substance, which 6 :5 end elevation of the same; Fig. 3, an enlarged mayor may not be mixed with an acid. The elevation of one of the circulation-tubes, and heat from the fire-box passing through the Fig. 4 an elevation of the oxygen box and flue causes the compound to give off oxygen, guard. V which is discharged through the nipple 17 Like letters and figures of reference indiinto the rear box D. A protecting-slide 18 is 2o cate corresponding parts in the diiferent figarranged under the box, and maybe manipuures of the drawings. lated through the furnace-wall by any desired My invention relates especially to a hotmeans. Said slide has an upwardly-turned water and steam-heater; and it consists in lip 19 adjacent the fire-box, and is provided certain novel features hereinafter fully set on its inner face with protecting-lining 20, 25 forth and claimed, the object being to produce (indicated by a black line in Fig. 4,) which is a simpler, cheaper, and more effective device constructed of insulating material. By maof this character than is now in ordinary use. nipulating this slide laterally of the box the The nature and operation of the improvebottom thereof may be protected in a proporment will be readily understood by all cont-ionate degree from the flame of the fire-box. 8o versantwith such matters from the following When the fires are dampened in the furexplanation. nace, so that the flame or sufficient heat to In the drawings, A represents the furnace effect the compound in the box will not igof the heater considered as a whole, which is nite the discharge of oxygen, I provide an provided with a firebox B, having a grate b, inflammable gas, which is generated from a supported by lugs d on the front fand back mineral oil contained in a box 25 at the front wall g of the furnace. On the top h of the of the furnace outside,or where it will be subfurnace there is a dome-shaped chest 0, from ject to a mild degree of heat. Said oil being the apex of which the discharged leads. The of a light volatile nature, I conduct the same back wall 9 is elongated vertically at j in its by a pipe 26, which opens at 27, adjacent the 40 rear portion,leaving a narrow flue it between mouth of the nipple 17, within the box D. As the top and such elongation. Said flue leads such gas is of a highly-inflammable nature, it into the top of a box D at the rear of the furreadily ignites from the heat from the firenace. The stack m opens into the bottom of box. Water being admitted to the supply said box. Afeed-water-heating-coil of pipeE and fire started in the grate, the full force of is disposed in the box D, the supply 10 for said the heat is drawn against the U-shaped pipes pipe opening through the wall of the box at H, creating an independent circulation in the bottom. A T-coupling valve q is in the each of said pipes and the dome. The heat supply, and the return 1' leads into said couppassing through the hue 7c and drawn downling. The coil discharges through a pipe T ward to enter the stock on superheats the wa- Ioo 50 outside the box leading into the dome at o. ter in the feed-water-heating coil E, deliver- An ordinary gage-glass w is connected with ing it to the dome C in such condition. By

means of the oxygen and gas, generated as described, this heat may be intensified to any desired degree and maintained when the fire on the grate is low. Moreover, When the device is used for hot-Water heating, the water being discharged from the dome-pipe 2' is returned through the return-pipe rdirectly into the coil and again superheated, maintaining a constant rapid circulation.

The same device is applicable for steamheating by reducing the amount of water in the dome to allow for steam space. The amount of fuel necessary to the proper heating of the water or generating of the steam is greatly reduced by my improved arrange ment.

It will be understood that the oxygen-generator and gas apparatus described may be applied to other forms of furnaces for superheating the supply before delivery to the boiler.

Having thus explained my invention, What I claim is- 1. The furnace A, provided With the box D, having the stack m, and the Wall g, in combination with the dome O, the feed-waterheating coil E, disposed behind said wall and opening into said dome, the flue 70 at the top of said Wall, and a receptacle for containing an oxygen-generating compound disposed adjacent said flue and opening against said coil substantially as described.

2. In a heater, a furnace and steam or water dome, in combination with a circulation feed-Water-heating coil disposed in said furnace between its fire-box and stack, and a receptacle for containing an oxygen-genera tin g compound disposed adjacent said coil.

3. The furnace A and dome O,in combination with the supply feed-Water-heating coil E, leading into said dome, and an apparatus disposed Within the furnace adjacent said coil for generating oxygen and an inflammable gas by the heat from the fire-box, substantially as described.

4. The furnace A, provided with the flue lo and stack m, in combination with the dome O, the feed-Water-heating coil E, opening into said dome, the receptacle 16, disposed adja cent said flue and opening against said coil, and the shield orguard 18 for said receptacle, all being arranged to operate substantiallyas described.

5. The combination, with the furnace A, dome O, and circulation feed-Water-heating coil, of the oxygen-generating receptacle 16, having a discharge-opening against said coil, and the oil-tank 25, having the dischargeopening adjacent the ox ygen-discharge, substantially as described. g

6. The combination, with a furnace and boiler, of a supply-pipe for said boiler, disposed in the furnace in the draft from its firebox, and an oxygen-generating compound so disposed that the oxygen given oif will beignited by the heat from said box and superheat said supply.

7. The combination, With a furnace and boiler, of asupply-pipe for the boiler, passing through the fire-box draft, an oxygen-generator disposed adjacent such supply-pipe, and an inflammable gas-generator, all being arranged substantially as described.

ANTON GRAF.

Witnesses:

K. DURFEE, O. M. SHAW.

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