US657127A

US657127A - Vapor-burning lamp.

Info

Publication number: US657127A
Application number: US2433399A
Authority: US
Inventors: Willis Mitchell
Original assignee: MITCHELL GAS GENERATOR AND BURNER Co
Current assignee: MITCHELL GAS GENERATOR AND BURNER Co
Priority date: 1899-04-05
Filing date: 1899-04-05
Publication date: 1900-09-04
Anticipated expiration: 1917-09-04

Description

Patented Sept. 4, |900.

lNu. 657,127.

w. MITCHELL.

VAPOR BURNING LAMP.

(Application led Apr. 5, 1899. Renewed July 20, 1900.)

No Model.)

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ASSIGNMENTS, TO THE MITCHELL COMPANY, or NEW JERSEY.

GAS GENERATOR AND BURNER VAPOR-BURNING LAM P.

SPECIFCATION forming part or" Letters Iatent No. 657,127, dated September 4, 1900. Application led April 5,1899. Renewed July 20, 1900. Serial No. 24,333. (No model.)

To all whom it may concern.-

Be it known that IVILLIS MITCHELL',a citizen of the United States,residing at Malden,in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Vapor-Burning Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

This invention relates chieti y to lamps using gasolene or similar vapor and having a chamber which supplies the burner and a generating tubular coil that discharges into the same.

The said invention consists in the construction and combination of parts hereinafter more particularly set forth and claimed.

In the accompanying drawings, Figure l represents a vertical central section of a lamp embodying my invention. Fig. 2 represents in perspective the alcohol cup or bowl ofthe said lamp and some ofthe parts immediately attached thereto or in contact therewith. Fig. 3 represents a detail view of the cover for this cup or bowl. Fig. d represents a detail view ofthe mixing-chamber. Figs. 5 and 6 represent detail views of the base of the said chamber. Figs.7 and 8 represent detail views of successive outer shells. Eig. 9 represents a detail perspective view of the rack which carries the regulator-needle and the guides for said rack. Fig. 10 represents a detail view of the deflector arranged within the burnerscreen, and Fig. ll represents a detail view of the said screen withv the detlector in place.

A designates a broad hollow base, prefererablyof sheet met-al or cast 1n etal, which may be either rectangular or circular in shape and serves also as a gasolene-reservoir- This is filled through an oil-inlet A', into which is fitted thetubular stein of a cup or low funnel A2. Said stem is internally threaded to receive the correspondingly-threaded solid stem a of a stopper a, the top of which closes the top of the cup. The upper part of this base or reservoir A is formed into a hollow dome A3, which is provided with an air-inlet tube o3,

internally screw-threaded to receive the cor respondngly-screwthreaded stem a5 of an airvent plug ai, having'an airpassage a through it. This passage is turned laterally at its lower end through the side of the said stem, so that air may pass through the said plug to the interior of the said dome and base while the said plug is in the position shown in Fig. l; but the inlet will be closed when the solid lower end of the stem a5 is turned down against the lower part of the tube as, which is so formed as to leave an opening much smaller than the main bore of the said tube. The outer part of the said plug is adapted to receive a rubber bulb, by the compression ot' which air is driven into the reservoirA, 'forcing the gasolene up through a vertical tube WV, which isslotted at its lower end and arranged within a vertical tube B. A cylindrical coupling-block C has a small central bore c in its middle part and a recess C' in its lower end, into which the upper end ot the tube B is fitted. In the upper end of the said coupling-block is another-recess C2 of about the same length as C', but of slightlygreater diameter, as shown. The wall oi' this is internally screw-threaded to receive the correspondingly-threaded stem D of an alcohol cup or bowl D. The lower end of the said recess is conical to receive a similarly-shaped iilling-block E. These parts D and E have a coincident central vertical bore practically continuous with that of the coupling-block C, so that a gasolene-tube F, about one-sixteenth of an inch in diameter, is carried up through the said coupling-block and stem and above the oil in the said cup or bowl D to forni a double generating-coil G about the miXing-chamberI-I. Atubularcolumn I, concentric with tube C, extends up from the dome A3 to the alcohol-cup D, being rigidly secured at both ends. This column fits the exterior of conplingblock C and also at its lower end on a cylindrical socket or bushing A4 of the dome A3, which is interposed between the lower end of the said column and the corresponding part of tube B and braces both, making a strong stem for the lamp. A concave cover I3, provided with a cylindrical the rods J of an ordinary shade-frame surrounding the dome-shaped reticulated burner K of the lamp. This burner, preferably of finely-woven wire, is mounted on the top plate H' of the cylindrical mixing-chamber` H, before mentioned, said'plate being circumferentially enlarged to receive it. A cylindrical shell or jacket H2, of diameter slightly greater than that of the top plate, extends down from the said top plate to the cover l3 and is fastened by screws 7c to the cylindrical upward extension 1/ of the said cover, these part-s l and H2 being arranged concentrieally. The peripheral part of the said top plate rests on the upward extension I', and the upper edge of the jacket H2 is bent over at 7c on t-he peripheral part of the said burner above the said top plate to hold the said burner in place. The said top plate has a central outlet HS formed therein and extended upward in the form of a short tube, discharging the contents of the mixing-chamber into a cap or deflector L, preferably-of sheet metal, suspended rigidly over the said tube from the under side of the raised center of the said dome-form burner.. This detlector or cap allows the air and vapor to mix more thoroughly before escaping, then directs them downward and laterally, so that they pass out at its periphery, and at last escape through the many small holes in the said burner for ignition. The base M of the said mixing-chamber consist-s of an upper disk-shaped part having a series of inlet-holes m formed through it, which admit the air from below to the interior of the mixing-chamber, and a screw-threaded stem N, having a central inlet-bore n, extended through the center of the said disk and receiving from a nozzle or end h2 of the generator-coil a supply of gasolene-Vapor, which passes from the said bore into the `said mixing-chamber. This supply is governed by a needle-valve O working up through the said bore to close or open the said nozzle at will, said valve being carried by a rack P, which is engaged by a pinion Q on a transverse regulating-shaft R, mounted on the ltop of the said alcohol-cup and provided with an exterior knob or milled head for convenience of operation. Said rack moves up and down in guideways S, fastened rigidly by arms T to the said alcohol-cup.

The alcohol is supplied by a supplementary reservoir U in the main reservoir or base A through an alcohol-pipe V, which extends upward through the bushing A4 and couplingblock C aforesaid and follows Vthe curvature of the exterior of the alcohol cup or bowl D, its upper bent end o passing in through the Side of'said bowl D to the interior thereof, as shown. The tubes and the several parts to leighteen inches to be reliably operative. The

which theyare attached are preferably soldered toget-her.

To force out the alcohol at will, I preferably employ a piston X, operated by a rod Y, the said rod having a limited independent movement in a tubular stem Qof the said piston, such movement being limited by a stoppin y. The said stem is provided with a hole at the side which admits alcohol to the bore of the said stem, and thereby tothe space below the said piston when the said rod is raised, but is closed by the downward motion of the rod. The piston moves up with the rod af ter the said hole is uncovered and down with the rod after the said hole is closed, the alcohol being forced thereby out through the tube V, which makes connection with the bottom of the alcohol-reservoir.

l The needle-valve O passes through a stuffing box or gland Z, which is screw-threaded internally to engage the external screwthreads of the stern N and provided with suitable pack-in g that surrounds the said needle-valve, being forced into the concavit-y n at the end of the said stem on screwing up the said gland.

An external cylinder or casing Z', slightly\ flaring at the top and bottoni, surrounds the casing, shell, or jacket H2, leaving an airspace between them to prevent overheating the outer casing vor cylinder Z', which there is often occasion to touch. The small diameter of the generatortube is found exceedinglyeficacious. I can increase or diminish the amount of pressure by varying the length of the said generator. This is usually about thirty inches and should not be as short as diameter must not be varied more than one thirty-second part of an inch or the result may not be satisfactory.

The opera-tion is as follows: The base A being supplied with gasolene and the supplemental alcohol-reservoir with alcohol, the latter is forced, as described, up through the pipe V to the cup or bowl D: The alcohol is then ignited, heating the generator. After it has been burning for about thirty seconds the needle-valve O is wi'thdrawn, allowing the heated air in the coil to escape into the mixing-chamber, and thus admitting the gasolen-e to the generating-coil, and the vapor thus produced is discharged into the mixingchamber through the passage before described. It there becomes mixedwith the air enter-ing through holes m. The heated mixture of gasolene-vapor and air passes up through the burner, being more thoroughly commingled in and by the defiector on the way, and is ignited as it issues through the said burner. Thisereates a draft up through the generator and mixing-chamber, continuously supplying the said burner until the needie-valve is raised to eut off the supply of gasolene. Y

A mantle-supporting rod J2 passes through a guiding-perforation in one of the legs or ICO IIO

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' rounding the said chamber and brackets I2 and is set at its lower end into or through the support T. An adj Listing-screw J3, working through the side of cup D, bears against the said rod or support J2 and affords a convenient means of holding the mantle at any point, within certain limits, to which it may be adjusted vertically. This rod, if desired, may bc extended through the said cup, its joint therewith being made liquid-tight, as must also be done with that of screw J3.

Having thus fully described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

l. In combination with a mixing-chamber having inlets for air and vapor and an outlet for the same when mixed, a generator surrounding the said chamber and supplying it through one of the said inlets, an alcohol-cup below the said chamber, a cover for the said cup provided with a central cylindrical hollow upward extension surrounding the said generator, and a Wiregauze or perforated burner covering the top of the said chamber, substantially as set fortl 2. In combination with a mixing-chamber having inlets for air and vapor and an outlet for the same when mixed, a generator sursupplying it through one of the said inlets, an alcohol-cup below the said chamber, a cover for the said cup provided with a central, cylindrical, hollow, upward extension surrounding the said generator, a wire-gauze or perforated burner covering the top of the said chamber and fastened on the same, and a deflector suspended from the said burner over the outlet of the said mixingchamber, substantially as set forth.

3. In combination with a mixing-chamber having inlets for air and vapor and an outlet for the same when mixed, a generator consisting of a line, tubular wire coil about onesixteentli of an inch in diameter wound around the said mixing-chamber and discharging into the same, an alcohol-cup below the said mixing-chamber and generator, and a cover for the said cup having a cylindrical upward extension surrounding the said generator and closed at its upward end by a horizontal annular extension of the top of the said mixing-chamber, substantially as set forth.

4. In combination with a mixing-chamber having inlets for air and vapor and an outlet for the same when mixed, a generator surrounding the said chamber and supplying it through one of the said inlets, a cup adapted to receive alcohol and arranged below the said chamber to heat the said generator when the liquid contained in said cup is ignited, a

burner supplied by the said chamber, a cover for the said cup provided with a central cylindrical hollow upward extension external to the said generator, means for supplying liquid to the said cup and the said generator, and two concentric casin gs arranged outside of the said cylindrical extension, each having an interval between it and the part next within, substantially as set forth.

5. In combination with a mixing-chamber for air and vapor, having an opening for the admission of air, a base for the said chamber having a small, central bore and a branch passage therefrom, a generating-coil which is wound about the said chamber and has its discharging end fitted into the said branch passage, a needle-valve working up and down in the said bore, means for supplying gasolene to the said generator, mechanism for raising and lowering the said needle-valve, guideways for the said valve and an alcoholcup provided with supports for the said mixing-chamber and the said guideways, substantially as set forth.

6. In combination with a mixing-chamber, a burner supplied thereby and a generator supplying vapor to the said chamber, an alcohol-cup arranged to heat the said generator and cause it to supply the said chamber with vapor, a cover for said cup, feet or brackets for said cover which are notched or recessed to fit on the edge of the said cup and adapted to support a shade-frame and means for supplying liquid to the said cup and generator, substantially as set forth.

7. In combination with a mixing-chamber, burner and generator arranged substantially as described, an alcohol-cup arranged below them to heat the generator and supply the chamber, and provided with a downwardlyextending stein having a central bore, a recessed and bored coupling-block screwing on the said stem, a tube fitting into the lower end of the said coupling-block, a tubular column supporting the said cup, arranged concentric With the said tube and exterior to the said coupling-block, a base having a raised tubular part which iits between the said column and the said tube, and conduits for the alcohol and the liquid which supplies the generator, extending up within the said column, substantially as set forth.

In testimony whereof I afix my signature in presence of two witnesses.

VILLIS MITCHELL.

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