US795890A - Inverted incandescent gas-lamp. - Google Patents

Description

PATENTBD AUG. l, 1905.

F. M. BROOKS. l INVERTED INGANDESGBNT GAS LAMP.

APPLICATION FILED FEB.3,1905.

@Ullman I Htn l embodying the invention.

UNITED STATES PATENT OFFIOE.

INVERTED INCANDESCENT GAS-LAMP.

Specification of Letters Patent.

Patented Aug. 1, 191:5.

Application filed February 3, 1905. Serial No. 243,918.

To (tl/Z whom, it may concern.-

Be it known thatI, FRANK M BRooKs, a citizen of the United States, anda resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented anew and useful Improvement in Inverted Incandescent Gras-Lam ps, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure l illustrates an elevation of a lamp Fig. 2 illustrates a vertical sectional view of the construction illustrated in Fig. 1.

In the drawings, A represents the gas-supply pipe; B, the usual Bunsen tube; C, the gasregulating cock, (made in the form of aneedlevalve in this case,) and D the air-inlets. These parts are or may be of any usual construction.

E is an enlarged space, which I call the eX- panding-chamber, formed at the end of the Bunsen tube.' F is a wiregauze fastened across this chamber, preferably at about its greatest horizontal diameter. Below the chamber is an open-ended tubular extension G, provided with a contracted mouth H. The mantle I, shown in dotted lines, is or may be supported from the part Gr, as indicated, or in any other preferred manner. The length of the extension G should be not less than half the diameter of the expansion-chamber. The adjustment of the mantle relative to the open mouth of the eXtensionG should be such that the extensionwill project into the mantle approximately one-third its length.

The gas issuing from the gas-check and the air-supply drawn in through the openings D in the Bunsen tube pass together through it downwardly and are discharged into the enlarged space or expanding-chamber E, and as they enter this chamber, being relieved from 'the pressure to which they were subjected in the relatively restricted Bunsen tube, they at once expand, causing eddying and intermingling circles of the gas and air within the eX- pansion-chamber, and, moreover, they are immediately projected against thewire-gauze F, stretched across this chamber, and owing to the diameter of the expansion-chamber and the fact that the gauze is stretched across it on or near the line of its greatest diameter the result of the air and gas being projected against the gauze is to intermingle then throughout the expansion-chamber. Thus a most perfect and homogeneous admixture of the two gases is secured, and owing to the perfection of their admiXture and what may be Y called the rarefaction of the gases they attain a condition of extreme inflammability.

, From'the expansion-chamber the perfectlycombined gases pass through the extension G and finally emerge therefrom through the contracted mouth H and there burn with'great energy, and owing to the continuity of the sides of the extension G and to its contracted mouth or opening H a blowpipe effect is produced, whereby the velocity of the air and gas through the entire length of the burner is increased and intense heat generated, this being the objects of the invention, and owing to the perfect homogeneity of the admixture there are practically no residues or products of combustion unconsumed.

In the ordinary inverted Bunsen tube the heat generated retards the air suction to such a degree that a yellow ame is produced, whereas aproper Bunsen ame is of a blue-green color;

but in my lamp, owing to the completeness of the mixture and the expansion of the gases caused by the expansion-chamber and gauze and the shape and vlength of the open extension G, with its contracted mouth, the gases, acquiring increased velocity and being consumed with great rapidity at the open mouth, generate a suction or vacuum'action, so that the flowing of the gases within the expansionchamber and likewise within the Bunsen tube are not retarded by the heat, but are drawn downwardly toward the point of consumption continuously and with great rapidity and are projected through the contracted mouth of the extension G with such velocity and in such volume as to prevent the passage of the flame in the reverse direction. Thus there is no possibility of the air ceasing. to iow into the Bunsen tube or the flame flashing back because of the continuous rush of the gases toward the point of combustion. In addition to this also the wire-gauze stretched across the expanding-chamber aids in preventing any back-flashing of the flame should the rush of the gases to the point of combustion be momentarily retarded by air-drafts, a reduction of gas-pressure, or otherwise. Thus there is constantly maintained a uniform ame accompanied by complete rapid combustion and intense heat, whereby the mantle is maintained in a condition of perfect incandescence.

It will be obvious to those who are familiar with this art that modifications may be made in the details of construction of the apparatus 'described and illustrated without departing from the essentials of the invention. I therefore do not limit myself to the details.

I Claiml. In an inverted incandeseentmantle lamp the combination of aBunsen tube, an enlarged chamber Connecting therewith and an openended tubular outlet therefrom, the length of the tubular outlet being at least equal to half the diameter of the enlarged Chamber.

2. In an inverted incandescent-mantle lamp the combination of a Bunsen tube, an enlarged chamber Connecting therewith and an openformer through substantially one-third of its length.

4. In an inverted incandescent-mantle lamp the combination of a Bunsentube, an enlarged chamber connecting therewith, a gauze diaphragm extending across the chamber and an open-ended tubular outlet from the chamber, the length whereof is equal to at least half the diameter of the enlarged chamber.

5. In an inverted incandescent-mantle lamp the combination of a Bunsen tube, an enlarged chamber connecting therewith, a gauze diaphragm extending across the chamber and an open-ended tubular outlet from the chamber, said outlet having acontraeted mouth and its length being equal to at least half the diameter of the enlarged Chamber.

In testimony whereof I hav'e signed my name to this specifica-tion in the presence of two sub-

Images