US1070002A - Burner for stereopticon and motion-picture machines. - Google Patents

Description

BURN

OR s P T OPTI B AN T;

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AGHI' NBS ATIO LE 0 mm 1 WM ma A d b 1 I w a D WW0 00,0 4 .0 #0 0 0000 0 0 100 0 0 0 0 030 0 0 000 n A.00 00000 0 .0 A 0 0 0 0 0 0. 0 0 00 0 0 0 00 010 0 0 0 0 0 0 00 0 0 0000 0 000 0 06 0 0 0 0 0 0 00 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0, 0 0 0 0 00 0 0 0 00 000, 000 0 0 00000000000 0 0 0 0 0 0 0fl 0 fl 0 0 0 0 0 0 0 0 0 0 I 0 1 4 000 00000000 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0 v0 0? 0 0000 0 WHWN N 0 0 0 0 0 0 .0 0 0 0 0 o 0 10 0 Y IV S nn CD NGT IINITE FRANCIS W. BELL, OF

NUNICA, MICHIGAN.

Application filed November 25, 1912.

To all whom, it may concern Be it. known that I, FRANCIS V. BELL, a citizen of the United States, residing at Nunica, in the county of Ottawa and State of Michigan, have invented certain new and useful Improvements in Burners for Stereopticon and Motion-Picture li lachines, of which the following is a full, clear, and exact specification.

This invention relates to incandescent burners especially designated for stereopticon and motion picture machines.

One object of the invention is to provide an etlicient and economical substitute for the calcium light commonly used in rural districts.

Another object is to employ a plurality of incainilescent mantles in such relation that they will project a large unbroken field of light of substantially uniform intensity, thereby incrzasing the etfioiency of the machine with which the burner is used.

The invention will be first hereinafter described in connection with the accompanying drawings, which constitute a part of this specification, and then more particularly pointed out in the claims at the end of the description.

In the drawings, wherein similar reference characters are used to designate the same parts throughout: Figure 1 is a front elevation of one form of burner embodying my invention, Fig. 2 is a plan view of said burner, and Fig. 3 is a diagrammatic view showing the relative positions of the mantles to the lens.

As illustrated in the drawings, the burner is adapted to support two inverted mantles A, A, side by side, and an upright mantle B arranged in alinement with the space between said inverted mantles in the "direction the light is projected, as illustrated in Fig. 3. In this figure, E designates the lens which is shown arranged in front of the group of mantles. The upright mantle is shown slightly in rear of the inverted mantles, but this arrangement may be reversed, if desired. The upright mantle is of such size as to overlap the space between the inverted mantles, thereby providing a combined field of light from the three mantles which is unbroken and substantially circular. The upward taper ,of the upright mantle corresponds in a sense to the downward curvature or general taper of the inverted mantles, so that the overlap is not.

Specification of Letters Patent.

Patented Aug. 12,1913.

Serial. No. 733,399.

sufi icient to detract perceptibly from the intensity of the light from the rear mantle. The upright n'iantle may extend slightly above and below the inverted mantles, as illustrated, thus filling out the substantially circular shape of the field of light projected by the combined mantles.

It is obvious that the gas furnished to the mantles may be prepared in various ways and from difierent hydrocarbons, such as gasolene, kerosene, or benzin. The gas, however made, may be supplied to all three mantles from the same pressure tank through a single connecting tube (not shown) which may be attached to the end of the pipe C ofthe burner illustrated. This pipe may be provided with two branches D, D leading, respectively, to the inverted mantles in front and to the upright mantle at the rear. The branch D, leading to the inverted mantles, is preferably arched, as at (Z, between the two mantles, as to reach above the upper end of the upright mantle and, at the same time, bring said inverted mantles down about midway between the top and bottom of said upright mantle in order to produce the substantially circular field of light before mentioned. it is not essential, however, for all the mantles to be supplied with gas from the same source. In fact, the form and arrangement of the pipes C, D and I) may be varied to suit difierent conditions without departing from the spirit or sacrificing the advantages of this invention.

The two inverted mantles may be 600 candle power each, and the upright mantle from 500 to 1000 candle power, it being understood that the burner is regulated in this respect in order to produce a field of light of substantially uniform intensity.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In an incandescent burner, the combination with two inverted mantles arranged side by side, of an upright mantle occupying a position in alinement with and overlapping the space between said inverted mantles when viewed from the direction in which the light is projected.

2. In an incandescent burner, the combination with two inverted mantles arranged side by side, of an upright mantle occupying a position in alinement with and overlapping the space between said inverted mantles when viewed from the direction in which the light is projected, said inverted mantles being arranged substantially midway between the top and bottom of said upright mantle, whereby a substantially circular unbroken field of light is produced.

3. In an incandescent burner, a plurality of mantles including two inverted mantles and one upright mantle arranged so that one of said mantles overlaps the space between the other two, whereby an unbroken field of light is produced.

4. In an incandescent burner, the combination with two gas-supply pipes, one arranged in advance of the other and one also occupying a higher level than the other, of a pair of inverted mantles carried by the higher pipe, and an upright mantle carried by the lower pipe and arranged to overlap the space between the inverted mantles.

5. In an incandescent burner, the combination with two gas-supply pipes, one arranged in advance of the other and one also occupying a higher level than the other, of a pair of inverted mantles carried by the higher pipe, and an upright mantle carried by the lower pipe and arranged to overlap the space between the inverted mantles, said upright mantle extending above the inverted mantles, and the higher pipe being arched between the latter for the purpose specified.

6. In an incandescent burner, the combination with two inverted mantles arranged side by side, of an upright mantle occupying a position in rear of said inverted mantles and overlapping the space between them when viewed from the direction in which the light is projected.

7. The combination with an incandescent burner having two spaced mantles arranged in a plane transverse to the direction of projection of the light, and a mantlearranged out of the plane of the first mentioned mantles and overlapping the space between them, of a projector arranged parallel to the plane of said first mentioned mantles.

S. The combination with an incandescent burner having a central mantle, and smaller mantles arranged at either side thereof and overlapping said central mantle, of a projector in operative relation with said group of mantles.

9. In an incandescent burner, the combination with a central mantle, of smaller mantles arranged at either side thereof and I overlapping said central mantle, the median lines of all of the mantles being arranged in the same horizontal plane.

10. In an incandescent burner, the combination with upper and lower tubular members having branches extending toward each other, of mantles mounted on said branches and overlapping one another to produce an unbroken field 01 light of substantially uniform intensity.

In testimony whereof I have signed my name to this specification in the presence of two attesting witnesses.

FRANCIS WV. BELL. lVitnesses:

JOHN PETERSON, EMIL WV. I-IAss.

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

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