Untitled record

No. 35,447. PATENTED JUNE 3, 1862.

W. HOWARD. COAL OIL LAMP CHIMNEY.

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United States Patent Office.

WILLIAM HOWARD, OF FLUSHING, NEW YORK.

COAL OIL LAMP CHIMNEY.

SPECIFICATION forming part of Letters Patent No. 35,447, dated June 3, 1862.

To dll whom it may concern:

Be it known that I, William Howard, of Flushing, in the county of Qneens and State of New York, have invented a new and useful Improvement in Glass Chimneys and Cones for Coal-Oil Lamps; and! do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which—

Figure 1 is a vertical central section of my invention,taken in the linexx, Fig. 2; Fig. 2 a horizontal section of the same, taken in the. line yy, Fig. 1.

Similar letters of reference indicate corresponding parts in the two figures.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A represents a glass chimney,and. B a glass cone or deflector. These parts may both be of the usual form, but instead of being detached and applied separately to the lampburner, as heretofore, I place the cone within the chimney and attach the lower edges of the cone and chimney together, the construction being such that the base of the chimney and the base of the cone are united together.

The cone and chimney may be blown or molded separately and then attached by fusion, or they may be blown or molded together in one piece at one operation; and in the lower part of the chimney there ate made ci rcumferentially a series of holes, δ,’ in a plane which intersects the cone horizontally about at its center, as shown at Fig. 1. When the cone and chimney thus attached or connected together are applied to the burner,they have the same relative position with each Other and the burner as those in common use, which are attached and applied separately to the burner. The base of the cone or flange aisfittedin the burner, as usual, and may be secured therein by any suitable catch or fastening.

The advantages of the invention are as follows: . '

First. The cone being permanently attached to the chimney,they both are removed from and applied to the burner simultaneously, and hence not Only time is saved in manipulating the parts, but fracturing by casual dropping rendered less frequent, as one piece is handled instead of two, and the glass cone being small, is,when detached from the chimney as heretofore, very frequently dropped, especially by careless persons; besides the parts are stronger combined than when separate from each other.

Second. The combined, chimney and cone may be manufactured at a less cost than when made separately, as heretofore.

Third. By having the holes δ made in the chimney, as shown, the air is admitted to the exterior of the flame at a point nearer its base than formerly and acts upon or iinpinges against it in a more direct manner and will insure perfect combustion with a low or small flame—a result which is not attained in an ordinary burner,in consequence of said draftholes being at or in quite close proximity to the base of the cone.⁷

Fourth. The advantage of the ordinary detached glass cone is obtained, to witrthe radiation of the light afforded by the lower part of the flame withih the cone,' without the disadvantage of the latter fracturing by expansion in being heated—a result due to the fastening mechanically of the chimney to the base of the cone and directly over the draftpassages which supply the exterior of the flanie with oxygen and which are formed by radial grooves or corrugations at the base of the cone. The air passing through those passages at the bottom of the chimney keeps the lower part of the latter Comparatively cool, while the cone, on account Sf its close proximity to theflame, rapidly heats and expands, and, the chimney being insulated from the cone by the air-passages does not readily expand, and the cone consequently is liable to break.

By my ipventiori it will be seen that the chimney and cone, in consequence of being formed in one piece admit of the heat being conveyed to the lower part of the chimney from the cone, and the former is allowed to expand with the latter, and fracture thereby prevented.

I am aware that detached glass cones have been used, and these I do not claim.

lam also aware that the lower part of the chimney has been so contracted as to dispense with the use of a cone, as shown in Dickie’s patent, 1862. This, therefore, I do not Claim.

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