US1205725A - Inclosed arc-lamp. - Google Patents

Description

K. FERBER & W. WISSMANN.

INCLOSED ARC LAMP.

APPLICAHON FILED APR-4.1913.

1,205,725. I Patented Nov. 21, 1916.

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UNTTED STATES PATENT OFFICE.

KARL FERIBER, OF BERLIN, AND WILI-IELM WISSMANN, OF CHARLOTTENBURG, GEE- MANY, ASSIGNORS T0 SIEMENS-SCHUCKERT VJERKE G. M. B. I-L, OF BERLIN, GERMANY, A CORPORATION OF GERMANY.

INCLOSED ARC-LAMP.

Application filed April 4, 1913.

T 0 all whom it may concern.

Be it known that we, KARL FERBER and lVILi-IELM IVIssMANN, citizens of the German Empire, and residing, respectively, at Berlin and Charlottenburg, near Berlin, Germany, have invented certain new and useful Improvements in Inclosed Arc- Lamps, of which the following is a specification.

Our invention rel-ates to inclosed arclamps comprising smoke arresters.

Inclosed arc-lamps having electrodes which deposit considerable quantities of solid matter are known in which a smoke chamber is provided for cleansing the gases discharged from the arc, said chamber having a baffle whose lower end is curved to be directed toward the arc and so that it will be within a short distance of the economizer. The arrangement is such that the gases issuing from the economizer chamber are caught by the lip of said baflie, are guided along one side of the guide to the other end of the smoke chamber, here pass around the end of the baflie and return along the other side into the globe. Such an arrangement renders unnecessary the employment of an enveloping globe closely surrounding the arc and economizer.

A primary object of our invention is to provide means for causing improved circulation of the gases in arc-lamps of this kind. To this end we arrange transversely of the end of the inwardly-curved portion of the said baiiie an additional bathe or deflector which slants out-ward and projects into the return-pas age for the gases. This baflie or deflector t directs the gases downward and outward and thus prevents them from returning directly to the are around the end of the baflie (Z. At the same time it has the effect of preventing the rising and descending gases from disturbing each other and forming eddies at the lower end of the baffle (Z. These two efiects favor the spreading of the returning gases throughout the entire space of globe g. In this way the gases lose their velocity and slowly and quietly return to the arc. Finally, as a result of the improved spreading out of the gases and because of the fact that they follow the lower path, (caused by the deflecting surface f), the globe is heated more thoroughly and more uniformly. Finally, the additional Specification of Letters Patent.

Patented Nov. 21, 1916.

Serial No. 758,970.

baffle or deflector provides an excellent means for proportioning the ratio of the cross-sections of the outgoing and the return passages.

According to our invention the additional battle or deflector extends somewhat beyond the issue baiiie not only in the direction of the return passage but also in that of the uptake. In this way a trough is formed at the same time, for catching the coarser particles of ash which are present in the ascending current of hot gases. Further, according to our invention we provide improved packing betweeii the removable portion of the lamp and the body. The said removable portion or globe-carrier makes tight fit w'th the lamp-body at at least two places located at a certain distance apart. Particular care is devoted to the tightening nearest to that chamber of the lamp in which the arc burns, a preferable form being a male conical extension of the lower portion of the lamp pressed into a corresponding fe male portion of the lamp-body. The second joint or tightening need not be such a good one.

The accompanying drawing, to which we will now refer, illustrates by way of example in vertical section one embodiment of our invention.

Between the walls a, b is the smoke-chamber A which extends vertically upward from the edge of the economize-r o. In the smoke-chamber A is the baffle (Z which is curved inward at its lower end in the direction of the arc. On the lowest part of the baffle (Z is mounted the additional baille or deflector 2, having the form of a reflecting shade. The deflector 25 projects somewhat beyond the inner face of the baflie (Z, so that a channel f is formed, wherein the coarser particles of ash are caught from the rising stream of hot gases. The path of the gases formed by the arc is indicated in the drawing by arrows.

The chamber of the lamp wherein the arc burns is closed below by the two glass globes g, g mounted in holders h, 2', respectively, which are firmly connected together and are pressed by the fasteners 7" into the body of the lamp. The two packings are obtained at the places 7c, Z and m, n, which surfaces are pressed upon one another by means of the fastening levers r.

7c is a male conical portion which is firmly connected with the holders or mounts h, i of the globes and which, when the fasteners 1" are being fastened beds itself firmly into the female conical portion Z of the body of the lamp. be made of a comparatively small width whereby the specific mutual pressure one on the other is increased and the joint made more perfect. The second joint, arranged at a certain distance from the first, is formed by the cylindrical portion m of the lamp body into which the cylindrical portion a of the holders enters, fitting as perfectly as possible. A still better closure of the lamp-body is obtained when two cylindrical portions 0, 7) are connected to the conical portions 7a, Z, which cylindrical portions also fit one-in the other as perfectly as possible and serve as guides when the lower portion of the lamp is being hung in its place. The cylindrical portion 10 is preferably enlarged below, as shown in the drawing, so that it embraces at m the mounts i, it. Further, it is preferable to arrange between the two tightening places 0, Z and m, n a chamber at of ample size so that a kind of angular joint is formed.

\Ve claim V 1. In an inclosed arc-lamp the combination with a casing having an inner clownwardly-projecting portion bounding a smoke chamber therein, an economizer mounted at the end of said portion, and a battle mounted in said chamber and curved at its lower end in the direction of said economizer, said baffle dividing said cham- 'tion with a casing having an inner downwardly-projecting portion bounding a smoke chamber therein, an economizer mounted at the end of said portion, and a baflie mounted in said chamber and curved at its lower end in the direction of said economizer, said baffle dividing said cham- The two conical portions may ber into an uptake passage and a downtake passage having orifices which are immediately adjacent to each other, of a deflector mounted transversely on the end of the curved portion of said battle and eX' ber and curved at its lower end in the di-- rection of said economizer, said bafiie dividing said chamber into an uptake passage and a downtake passage having orifices which are immediately adjacent to each other, of a deflector mounted transversely on the end of the curved portion of said baffle and extending into said downtake passage, said globe-carrier forming with said casing a plurality of air-tight joints for the purpose specified.

4. In an inclosed arc-lamp the combination with a casing having an inner downwardly-projecting portion bounding a smoke chamber therein, a globe-carrier mounted in the outer portion of the casing, an economizer mounted at the end of said portion, and a baflie mounted in said chamber and curved at the lower end in the direction of said economizer, said baffle dividing said chamber into an uptake passage and a downtake passage having orifices which are immediately adjacent to each other, of a deflector mounted transversely on the end of the curved portion of said battle and extending into said downtake passage, said globe-carrier forming with said casing a labyrinth packing, for the purpose specified.

In testimony whereof we have signed our names to this specification in the presence of two witnesses.

KARL FERBER. WILHELM WVISSMANN. IVitnesses HENRY HASPER, WOLDEMAR HAUrT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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