US555450A

US555450A - Thomas johnson

Info

Publication number: US555450A
Authority: US
Publication date: 1896-02-25
Anticipated expiration: 1913-02-25

Description

(No Model.)

T. JOHNSON. 5 VAPOR STOVE.

' No. 555,450. P55511555 P5525, 1896.

jizaafi NITED STATES ATENT OFFICE.

THOMAS JOHNSON, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE=HALF TO \VILLIAM BRANDON, OF SAME PLACE.

VAPOR-STOVE.

SPECIFICATION forming part of Letters Patent No. 555,450, dated February 25, 1896.

Application filed December23, 1895. Serial No. 573,169. (No model.) 7

To all whom it may concern.-

Be it known that I, THOMAS JOHNSON, of the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Vapor-Stoves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to an improvement in vapor-stoves wherein gasoline is used as a fuel, and relates to an improvement in that particular style or type of such stove known generally to the trade as the New Process vapor-stove. In this class of stoves oil is delivered from the reservoir in drops upon a perforated cylinder or surface, and warm air taken from near the burner of the stove is conducted through a pipe and delivered to the perforated cylinder upon which the oil drops, and taking up the oil converts it into a vapor, and this hydrocarbon vapor passes through a pipe to the burner, where it is ignited and burns in the form of a gas. This class of stove has very largely displaced the old style of stoves having self-generators, or stoves wherein the fluid is conveyed from the tank to the burner in a liquid form and is there transformed into a vapor, by the heat of the burner; but there is one objection to this style of stove that did not exist in the old style, and this is that after the oil is shut off, when the use of the stove is, for the time being, discontinued, there is an amount of unvaporized fluid on the perforated cylinder, and this fluid is taken up by the same amount of oxygen as was used while the oil was continuing to drop, so that the same amount of oxygen is passing to the burner while the quantity of vaporized oil gradually diminishes, and this circulation keeps up until the burner finally becomes extinguished, and as the flame of the burner becomes very nearly exhausted the excessive current of air loaded with but a small amount of gas causes the flame to puff out or become extinguished before the circulation of gascarrying air is entirely consumed. The result of this is that these stoves have always been noted for emitting a disagreeable odor after they are turned ofi.

The object of my invention is to overcome this difficulty, and I have discovered that it may be overcome by partially closing off the circulation from the hot-air pipe at the time the reservoir is turned off, so that the proper amount of oxygen is delivered to the diminished amount of oil on the perforated cylinder to insure perfect combustion and to cause a gentle flow of hydrocarbon to the burner after the reservoir is turned off, so that the burner will not puff out or become extinguished until the gas-carrying air is entirely consumed. I accomplish this result by the mechanism shown in the drawings, in which Figure I is a side elevation, part in section. Fig. 11 is an enlarged vertical section through the hot-air pipe, showing the valve closed and in edge view. Fig. III is an enlarged section taken on line III III, Fig. I. Fig. IV is a view showing part of the hot-air pipe in section, and showing the valve closed, part in elevation and part in section. Fig. V is a similar view showing the valve entirely in elevation and closed.

Referring to the drawings, 1 represents a vapor-stove, which, except so far as it is modified by my invention, as hereinafter pointed out, is of the ordinary type or style of such stoves now generally upon the market.

2 represents the burner of the stove; 3, the hot-air pipe; 4:, the oil tank or reservoir; 5, the valve that controls the flow of oil from the tank; 6, the pipe through which the hydrocarbon is conducted to the burner, and 7 a perforated cylinder located at the upper end of the pipe 6 within a housing or drum 8, with the upper end of which the pipe 3 communicates. The perforated cylinder 7 and the drum 8 form what is commonly known in these stoves as the vaporizer. These parts are, so far as my present invention is concerned, in themselves old.

In the operation of such stoves the oil falls drop by drop onto the perforated cylinder 7 and is taken up by air passing through the pipe 3 and transformed into a hydrocarbon gas, which passes through the pipe 6 to the burner, where it is consumed without emitting anobjectionable odor so long as the oil continues to drop from the tank onto the perforated cylinder; but, as stated, when the tank is turned off the amount of air passing through the pipe 3 is out of proportion with the amount of oil contained on the perforated cylinder, and this improper proportion i11- creases as the oil contained on the perforated cylinder after the tank is shut oif becomes less and less, the result being an imperfect combustion 'at the burner and the pufling out of the burner by the excessive circulation before the gas-carrying air has been entirely consumed, resulting, as stated, in the stove emitting a disagreeable odor. This defect I overcome by placing in the air-pipe 3 a valve 9. I prefer to place this valve slightly above the table or top of the stove, as shown in Fig. I, as it can be here conveniently reached, but it may be placed at some other point in the hot-air pipe. The valve is provided with a passage-way that permits the passage of a small amount of air after the valve is closed, this air being suflicient to take up the oil on the perforated cylinder after the tank is turned off, and causes a gentle flow of carrying air, that is gradually diminished in richness, to the burner. The valve 9 should be closed at substantially the same time as the tank is turned off. The passage-way I have shown in the form of a perforation or hole 10 drilled through the valve. (See Fig. III.) The stem of the valve is provided with a suitable handle 11, by which the valve is turned, and the valve is preferably provided with a pin 12 at one side, which, when the valve is opened, comes against the inner wall of the hot-air pipe, as shown in Fig. V, indicating that the valve is entirely open, and preventing the valve from being moved farther than a full, open position.

I am aware that it has been sought to overcome the obj eetionable feature of these stoves above mentioned by locating a valve beneath the burner or in the pathway of the gas from the vaporizer or perforated cylinder to the burner; but this is objectionable, for the reason that it causes a pent-up quantity of unconsumed gas which is liable to explode, and for the further reason that this gas sooner or later finds its way through the stove into the room, whereas with my arrangement the gas is entirely consumed, but in such a manner that the stove does not emit a disagreeable odor.

I claim as my invention 1. In a vapor-stove, the combination of a burner, a vaporizer upon which the oil is delivered, a hot-air pipe extending from the burner to the vaporizer, a pipe extending from the vaporizer to the burner and through which the hydrocarbon is conveyed, and a valve located in the hot-air pipe and formed to permit a small passage of air after it is closed, substantially as set forth.

2. In a vapor-stove, the combination of a burner, a vaporizer upon which the oil is delivered, a hot-air pipe extending from the burner to the vaporizer, a pipe extending from the vaporizer to the burner and through which the hydrocarbon is conveyed, and a valve formed with a perforation 10 for the passage of asmall amount of air after the flow of oil is shut 01f and after said valve is closed, substantially as and for the purpose set forth.

THOS. JOHNSON. In presence of-- S. KNIGHT, N. FINLEY.