US613290A - Device for preventing smoke in boiler-furnaces - Google Patents

Description

Patented Nov. I, I898. w. R. MILLS. 4 DEVICE FOR PREVENTING SMOKE IN BOILER FURNACES.

(Application filed Nov. 6, 1897.)

2 Sheets-Sheet I.

(No Model.)

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Patented Nov. I, I898.

w. R. MILLS. DEVICE FOR PREVENTING SMOKE IN BOILER FURNACES.

(Application filed Nov. 6, 1897.

2 Sheets-Sheet 2.

(No Model.)

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UNITED STAT S PATENT OFFICE.

.WILLIAM RILEY MILLS, OF JACKSON, MICHIGAN.

DEVICE FOR PREVENTING SMOKE lN BOILER-FURNACES.

SPECIFICATION forming part of Letters Patent No. 613,290, dated November 1, 1898. Application filed November 6, 1897. Serial No. 657,698. (No model.)

To aZZ whom, it may concern.-

Be it known that I, WILLIAM RILEY MILLs, a citizen ofthe United States, residing at J ackson city, county of Jackson, State of Michigan, have invented a certain new and useful Improvement in Devices for Preventing Smoke in Boiler-Furnaces, of which the following is a full, clear, and exact specification.

My invention has relation to a device forpreventing smoke in boiler-furnaces.

My object is to provide a device of this character which by reason of its ability to produce perfect combustion in the boiler-furnace will overcome and prevent the generation and emission of smoke.

It is also my purpose to provide a device by means of which the necessary amount of atmospheric air will be proportionately admitted to the furnace as is required and disposed of with relation to the fire, so as to continually provide a uniform quantity of oxygen to the furnace-fire at the location where it is needed, thereby maintaining a uniform heat without causing smoke and as a result keeping the steam at a constant pressure.

Another object of my invention is to provide a device which may be readily attached to and detached from a furnace without necessitating any change in the wall of the furnace; and, finally, my object is to provide a device which will be cheap to manufacture and durable and efficient in use.

Referring to the drawings forming a part of this specification, Figure 1 is a perspective view of my device, showing it applied to a furnace. Fig. 2 is a sectional view of the same, showing the draft shut off. Fig. 3 is an end view of the rotary drum. Fig. 4: is a sectional elevation showing the draft full on, and Fig. 5 is a rear elevation of my invention.

In the drawings, 1 indicates a furnace-wall of any well-known construction, and 2 the usual fire-door, to which is hinged at 3 my smoke preventer, having a handle 4 and catch 5, which are of simple and apparent construction and need not be described. A steam-pipe 6 from the boiler discharges, through short nozzles 7, jets of steam over the fire for a purpose which will hereinafter appear.

The door 8 of my device is provided with a liner 9, cut away for the reception of the rotary damper 10, which is journaled therein at 11. This cut-away portion is hollow and is provided with air ducts or flues 13, which communicate with the upper air-receptacle 13 of the said liner. It will be noted that the bottom 15 of the upper portion of the liner is provided with a series of perforations 16, whose use later will become evident. The top of the door is provided with a register 17, whose movement may be controlled by the finger I8.

As before stated, the rotary damper 10 is journaled in the sides 19 of the door and comprises two heads 20 and 21, to which are securely attached by any suitable means airpartitions 22, said partitions being bent so as to form angular air-passage ducts 23 24 25 26.

It will be observed that the heads 20 and 21 have each an angular section 27 removed from their ends, while the central partition 22 has secured to its outer face an operatinglever 28, having a pawl 29 adapted to work in notches 30 of a segmental rack 31, which is bolted at 32 to the front face of the door.

An apron 33 and bottom piece 34: serve to form a casing for the rotary damper, as is plainly shown in Fig. 2 of the drawings.

In use the jet 7 is allowed to discharge steam into the fire-box, as required, while the amount of air necessary to insure perfect combustion is controlled by the operatinglever and the segmental rack hereinbefore alluded to.

By raising the lever to its full limit, as shown in Fig. 2, it is evident that air will not be admitted to the fire-box, while by lowering the lever to the extremity of the segmental rack, as shown in Fig. 4, air is admitted in full quantity to the fire-box, the angular partitions 22 serving to deflect the air in such manner that it will pass over the fire to the point required, thereby supplying a proper quantity of oxygen at that location and causing perfect combustion, while at the same time preventing the escape of unconsumed particles of carbon, smoke, gases, and other products of combustion.

Air is admitted to the liner by means of the register 17, as may be required, the draft from the furnace causing the same to pass out through the d ucts 13 and as a result keeping the back of the door, as well as the damper and its sections, cool, thereby preventing warping or cracking of that portion of the device.

I claim- 1. Asmoke-preventer, comprisinga casing, a liner in said casing, a perforated rotary damper in said liner having partitions therein, and means for regulating the flow of air through the damper and liner.

2. A smoke-preventer comprising a casing, a liner in said casing, provided with a register, a perforated rotary damper having partitions therein and means for regulating the flow of air through the damper.

3. A smoke-preventer comprising a casin g,

- a liner in said casing, a perforated rotary damper having partitions therein, and means comprising a rack and, lever for operating the damper.

t. A smoke-preventer comprising a casing, a liner in said casing, provided with a register, a perforated rotary damper having partitions therein, and means for operating the same, comprising a segmental rack and lever, attached to the damper.

5. A smoke-preventer comprising a casing, a liner in said casing provided with air-duets, a register connecting with said ducts, a perforated rotary damper below the register, and means for operating the damper.

6. A smoke-preventer comprising a casing, alinerin said casing, provided with air-ducts, a register in said liner, perforations in the liner, adapted to register with the air-partitions in the damper, and means for controlling the flow of air from the damper to the furnace.

7. Asmoke-preventer, comprisinga casing, a liner therein, provided with air-ducts, a register connecting with said air-ducts, perforations in the bottom of the liner below the register adapted to register with the air-partitions in the rotary damper, and means for controlling the fiow of air from the damper to the furnace.

8. A smoke-preventer comprising a casing, a liner therein, provided with ai r-ducts, a register connecting with said air-ducts, perforations in the bottom of the liner below the register adapted to register with the air-partitions in the rotary damper and means for controlling the fiow of air from the damper, to the furnace, comprising alever secured to the damper, and engaging with a rack.

9. A smoke-preventer comprising a door, a casing, a liner therein, provided with airducts, a register located above and connecting with said air-ducts, perforations in the bottom of the liner below the register adapted to register with the air-partitions in the damper and means for controlling the flow of air to the furnace comprising a segmental rack secured to the door and an operating-lever attached to the damper.

10. In a smoke-preventing apparatus the combination of a furnace-door, containing a perforated rotary damper having partitions therein, with steam-jets directed upon the area of combustion of the grates.

In testimony whereof I affix my signature in presence 01": two witnesses.

WVILLIAM RILEY M ILLS.

Witnesses:

J. BUEHLER, L. DAVIS.

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