US417620A - George w - Google Patents

Description

' (No Model.) f

l G. W. Woo-DWARD.

LAMP.

No. L11/7.620. l Patented Dec. 17, 18.89.

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` UNITED STATES', PATENT OFFICE.

' reservoir.

GEORGE WV. VOODVARD, OF BROOKLYN, ASSIGNOR TO THE ANSONIA BRASS AND COPPER COMPANY, OF NEV YOR K,N. Y.

LAMP.

SPECIFICATION forming part of Letters Patent No. 417,620, dated December 17,1889.

i Application filed April l5, 1889. Serial No. 307,241. (No model.)

To all whoml it may concern:

Be it known that I, GEORGE W. WOOD- WARD, of Brooklyn, in Kings county, and the State of New York, have invented a certain new and useful Improvement in Lamps, of which the following is a specification.

My improvement relates to that type of central-draft lamps in which` is employed a thimble or inner air-distributer that extends from the central-draft tube upwardly some distance above the same and supplies air in jets to the inner surface of the flame.

The improvement consists ina wick-tube having the upper edge of its inner wick tube or shell extended inwardly and a perforated .thimble of uniform size from end to end extended `into the inner shell, providing an uninterrupted annular air-space between it and the inner shell, the said thimble having a bearing on all portions of the inwardly-turned edge. i

In the accompanying drawings, Figure. l is a central vertical section of thenpper part of a lamp embodying my improvement. Fig. 2 is a plan or top view of the central portion thereof. Fig. 3 is a side View of a thimble or inner air-distributer.

Similar letters of reference designate corresponding parts in all the figures.

A designates the upper part of an oil-reservoir. This reservoir may be made of sheet metal or other material and of any desired form.

B B2 designate two cylindric tubes or shells arranged concentrically, one B within the other B2. These may be made of sheet metal. A wick C, of annular form, is arranged between these two tubes or shells B B2. The inner tube or shell B serves as a central iiue, through which air may ascend to the inner surface of a flame emanating from the wick. Air passes to the outer surface of the iiame through an air-distributer D, arranged outside the upper portion of the tube or shell B2, and secured, preferably in a detachable manner, in the upper part of the The wick C is shown as surrounded by a band or ring E, which may be made of sheet metal.

F designates a draw-bar connected with the band or ring E and extending up through a guide'in the upper part of the reservoir, so as to be accessible from the outside of the reservoir. By raising or lowering this 'drawbar the Wick may be elevated or depressed.

The draw-bar may be detachably secured to the band 0r ring; but this is immaterial to my present improvement.

G designates an inner air-distributer or thimble. It is arranged at the upper end of 6o the inner tube or shell B of the wick-tube.

It may be made of sheet metal. As shown, it

is cylindrical and of uniform size from end to end, iinperforate at the top, and perforated along the sides. It receives the air ascending through the inner tube or shell B', and distributes this air in jets upon the inner surfaceof the flame. It is the peculiar combination of this inner air-distributer or thimble G with the inner tube or shell B ofthe wick- 7o tube that constitutes my present improvement. The upper end of the inner tube or shell B is bent or turned inwardly, so as to form abearing for the innerair-distributer or thimble. In this way the inner air-distributer or thimble may be stayed or maintained in an upright position, and need not be for this purpose provided with any outward projections, and it also provides an uninterrupted annular air-space between the So thimble and inner shell of the Wick-tube. The manner of sustaining the inner air-distributer or thimble vertically is not materia-l. I have shown a shelf H arranged Within the inner tube or shell B for this purpose andas supported upon a bead b, turned inwardly in the said inner tube or shell.

The inwardly-turned upper edge of the inner tube or shell is very advantageous. It

bears Wholly upon the thimble and tends to 9o' catch oil running down the body or thimble and conduct it into the wick-tube, instead of allowing it to iiow down through the central air-passage. It materially reduces the liability of any dbris from the wick falling through' 9 5 the central air-passage. The wick cannot catch upon the upper edge of the inner tube or shell while being lowered. Outward projections upon the inner air-distributer or .thimble are rendered unnecessary. All air rco ascending the central air-passage will be caused to pass into the inner air-distributer or thilnble. The Wick will be left free and loose at the top.

That I claim as my invention, and desire to secure by Letters Patent, is-

In a central-draft lamp, the combination of a, wick-tube having the upper edge of its inner tube or shell extended inwardly, and an air-distributer or thimble perforated along its sides and of uniform size from end to end, the

said thimble extended into the inner shell, 1o

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