US410540A - dayidson - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. E. G. DAVIDSON. INUANDESGENT GAS BURNER.

Patented Sept. 3. 1889.

(No Model.) 2 Sheets--Sheet 2.

B. G. DAVIDSON. INUANDESGENT GAS BURNER.

No. 410,540. Patented Sept. 3, 1889.

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j F E l 1 win b20323 L gufwitvien ooz UNITED STATES PATENT OFFICE.

EDIVARD C. DAVIDSON, OF NEWV YORK, N. Y.

INCANDESCENT GAS-BU RN ER.

SPECIFICATION forming part of Letters Patent No. 410,540, dated September 3, 1889. Application filed April 1, 1889. serial No. 305,555. (No model.)

To all whom, it may concern:

Be it known that I, EDWARD (J. DAVIDSON, of New York city, in the State of New York, have invented certain new and useful Improvements in Incandescent Gas-Burners, of,

which the following is a specification.

My invention relates to that class of burners in which filaments or pencils of refractory incandescent material are suspended in or above the flame of a gas jet or burner.

The invention consists in certain improvements in the manner of suspending and adjusting the filamentholders.

To carry out the general purpose of my invention, I may employ three or more groups of pendent filaments or pencils of incandescing refractory material and arrange them at an angle to each other, so that the light will be diffused in all directions. For instance, I may employ three sets or groups of filaments arranged in such relation to each other that they form a figure triangular, or approximately so, in cross-section. Such fila Inents, being rendered incandescent by suitable burners, will of course throw the light in all directions, the same as an ordinary circular or Argand gas-burner; or the groups of filaments, of which there may be three or more, may be arranged so as to be adjusted or turned horizontally about their supports, so that they may be either arranged in triangular form or turned so that each group of filaments stands on a radial line from the central support. The invention, which consists in certain improvements in devices for suspending and adjusting the filament-holders, will, however, be more fully understood from the drawings and following description.

In the drawings, Figure 1 is an elevation of a gas-bracket having multiple burners and multiple groups of filaments to which my improvements may be applied. Fig. 2 is a similar view illustrating a different type of bracket. Fig. 2 is a detail view of the manner of connecting the groups of filaments to their supports; Fig. 3, a detail view showing the manner of supporting and vertically adjusting the heads carrying the pendent filaments; Fig. l, a detail cross-section indicating the same device. Figs. 5 and 6 show other means for vertically adjusting the filament-holders, and Fig. 7 is a detail sectional plan illustrating the radial arrangement of the groups of filaments.

In Fig. 1, A represents a curved pendent gas tube or pipe screwed into an ordinary gasbracket A. At its lower end the pendent tube A is provided with three radiallyprojecting tubes B, carrying ordinary burnertips Z). The filament heads C consist of metal caps, from which depend double rows of filaments or pencils 0, of incandescing refractory material. Each group of filaments is suspended above a burner and is arranged in a plane coinciding with the plane of the flame and at right angles to the radial line on which the burner-tube projects. As a result of this arrangement the filament groups form a triangular figure in plan or cross-section, and consequently throw the light in every direction, as does an ordinary circular burner. Each radially-projecting tube may have its own cock, as shown, so that either or all three of the burners may be lighted. The filament heads may be carried by arms cl, all joined to a collar D, sliding on the pendent arm A, and held by a set-screw (Z, so that they may all be simultaneously adj usted vertically with reference to the burners. I connect-the groups of filaments to the supports, as will be hereinafter described. In Fig. 2 a like arrangement with a non-pendent burner is shown. A burner E, having three radially-projecting burner-tubes e, is screwed into the socket of an ordinary bracket. This burner carries a vertical post F, which supports the adjustable collar D, as in Fig. 1. One way of connecting the groups of filaments to their supports is shown in Fig. 2, where 0: indicates a set-screw for affording an adjustable connection. more fullyset forth in other figures of the drawings. With the exception of the different types of brackets, the burners shown in these two figures are practically the same, except that in Fig. 2 the filament heads are brought close together at their ends to form a more compact triangular figure.

In Fig. 7 the filament heads may be arranged in triangular relation to each other over corresponding burners, as indicated by the full lines, or they maybe rotated so as to stand radially with reference to the central support, as indicated by dot-ted lines; but of These details are, however,

course the burners would have to be similarly turned, so that the planes of the flames would coincide with the plane of the filament groups. With this arrangement it Will be seen that light is cast in every direction without lateral shadows. The filament heads may be adjusted in slotted or perforated radial arms projecting from the collar D. For instance, in Figs. 3 and 4- the filament-head may have a tooth suspending rod or arm 0, adapted to engage in the open slotted end of the radial arm d By withdrawing and inserting the toothed arm from the open slotted radial arm, the filament head may be adjusted Vertically, or the radial arms may have apertures in them, through which vertical rods 0' on the filament heads pass, as indicated in Figs. 5 and 6. In the former a set-screw c on the radial arm clamps the filament-head-suspendin g rod at any desired point. In the latter the end of the filament-head-suspending rod is screwthreaded and carries an adj ustable nut Either of the devices shown in Figs. 5 and 6 will permit of the adjustment indicated in Fig. 7, or any other suitable means may be employed.

Various other means of adjusting the filament heads may readily be devised by those skilled in the art; but it will be observed that in the several constructions which I have shown the heads are either simultaneously or individually adjustable upon and independently of the upright support which carries them, whereas heretofore, as far as I- am aware, it has been customary to adjust the vertical support.

As is well understood, burners of the class herein described are to be used with hydrogen gas or water-gas having little, if any, illuminant. The commercial production of Water-gas is such that it may now be furnished at a price far less than the poorest coal-gas. Assuming, therefore, that with a burner of the type herein described each jet willconsume two feet per hour, which would be ample when the three were burning, there would be but an expenditure of six feet of gas per hour, giving a pure beautifullight of high candle-power far exceeding that which would be obtained from a much greater quantity of coal or illuminating gas. The light is pure and white and without flickering or wavering. The pencils or filaments employed may be of the ordinary kind open to usesuch, for instance, as magnesia mixed in the preparation of them with a small portion of starch. These pencils are held by their upper ends in the holders by a packing of the same material applied while in a soft or plastic condition. By preference the filaments are so .grouped in side View as to present a curved line at their lower ends to conform somewhat to the shape of the flame of an ordinary gasjet. Of course in such an arrangement as that indicated in the drawings, more especially in Figs. 2 and 7, one of the groups might'be omitted, which it may be assumed is the wall from which the bracket projects.

The two remaining groups forming the V-shaped figure will then throw the light into the room in every direction; but there will be no useless expenditure of light directed against the adijacent wall of the room.

I claim as my invention- 1. The combination, substantially as set forth, of radially-arranged independent gasburners, a centrally-located support extending above the burners, independent groups of filaments arranged in angular relation to each other, radial arms in which the filament groups are mounted proj ecting from said central support above their corresponding gasburners, and connections between each filament group and its radial arm, by which the group is independently adjust-able and re- 1 movable.

,cils carried by a suitable head, a support-ingrod connected with said head, and a supporting-arm in which the supporting-rod is both vertically adj ustable and rotatable.

In testimony whereof I have hereunto subscribed my name.

EDWARD C. DAVIDSON.

Witnesses:

BESSIE MILLER, G. M. BROOKE.

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