US50434A - John g - Google Patents

Description

UNITED STATES PATENT Ormea.

JOHN e. WOODWARD, oF sr. JOHN, NEW'BRUN'SWIGK.

VENTILA'TING APPARATUS FOR 'STEAlV-V'ESSELS, 86C.

Spcieation forming partof Letters Patent No. 50,434, dated October 10, 186i making part of this specification, 4wherein I have represented a vertical section of said vventilatin, apparatus as fitted into a vessel.

Great diiculty isl experienced in the ventilation of engine and fire rooms on board of 'steam boats and ships in consequence of the confined space and great heat Vradiated from the boilers and furnaces.l Wind-sails and canvas tubes have been employed, and also ventilating-pipes; but still the temperature upon many steamboats, gunboats, monitors, and sea-going stearnships is so great that'the engineersand firemen are often prostrated, and

are obliged to come upon decl; frequently to enable them to continue their duties. Besides this, the dust, sparks, and ashes very often blow about'thetire and engine rooms, particularly` when-the doors are opened ibrcharging or raking the tires; and` when it becomes necessary to draw out the res and extinguishthe coals the heat, dust, steam, and dirt are very inconvenient and oppressive.

The nature of my said invention-consists in a Ventilating-casing surronndingor contiguous to the smoke-pipe or funnel through which air is drawn from the engine and re rooms by the column of air ascending by being warmed by the smoke-pipe. This current of air taken from the engine-room conveys away any noxious gases, dust, vapors, and also the heated air, and in place. thereof the cool air will descend by a natural action through the hatchways, thus rendering the engine-room of an agreeable temperature, and'A this systemof ventilation may be extended by pipes to the other' portions of the vessel. I also carry the said Ventilating-case up above the top end of the smoke-pipe or funnel of the boilers, in order that the ascending ventilating-current of air-may increase the draft of air passing through the furnace.

In the drawings, a represents the bottom of the vessel, or one of the decks. b represents the other deck. (lisa boiler of any usual or desired construction, andv e is the smoke-pipe or funnel, as usual. fis a casing surrounding y the funnel and extending from 4the deck iinmediately above the'boiler to the top of and slightly above the said smoke-pipe. The space between this easing fand the smoke-pipe becomes an annular ventilator,'that takes up all dust, vapors, heated air, duc., with a powerful circulating` current induced by the heatof the smoke-pipe, and, passing above the upper end of said smoke-pipe, aids the draft to the tiresby promoting the escape of theprodncts'of combustion freni this end of said pipe. The

annular Ventilating-space is connected at its lower end in any convenient'manner by a cas-l ing or pipes with the parts of the vessel to be ventilated. v

In the drawings the smoke-pipe is shown at .the furnace end of the boilerand a partition or hood, h, extendingdown near the front of the furnace to a short distance. above the tiredoors, serves to direct the circulating current ot' air in such a manner as to convey away all dust' and vapors and -prevent the'heat from coming into the engine-room.

I have represented a casing, i, inadein sections, so that it can be removed, surrounding the boiler, leaving an air-space between itself and the boiler, the object of which is to retain heat and prevent the Ventilatingcurrent'of air cooling the boiler too ^much. This casing is to be retained in place by hoops ruiming around the boiler, the metallic plat'esrunning lengthwise of said boiler, and, if preferred, openings may be left in the casing at the points 1, 2, and 3, so that asmall circulation of air may be allowed to 'prevent the air becoming too m'ucb heated within the casing t'.

Vhat I claim, and desire to secure by Lett-ers Patent, is

1. A ventilatingcasing around or contiguous to the smoke-pipe or funnel, substantially as set forth, so that the Ventilating-current of air may be induced by the heat of the smokepipe, as set forth. l

2. Extending the ventilatingcasing above the top of the smoke-pipe or funnel to increase the rapidity of the escape of the products of leaif'ingan air-space, as set forth, said casing;`

combustion from said smoke-pipe, as set fort-h. 3. A partition or hood extending down in front of the furnace at a short distance from the same, in combination with thc Ventilating'- casing around the smoke-pipe, as specified.

4. Inclosing the boiler in a. casing made of sheet metal a short; distance from said boiler7 being removable in sections,- as specified.

Dated this 21st day of September, A. D. 1865.

J. G. WOODWARD. Witnesses UHAs. H. SMITH, GEO. D. WALKER.

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