US25493A - John l - Google Patents

Description

J. L. DRAKE.

Lamp.

Patented Sept. 20, 1859.

Invenwr:

Witnesses:

N. PETERS. wmmunm n her. Washingtun. D c.

UNITED STATES PATENT OFFICE.

JOHN L. DRAKE, OF CINCINNATI, OHIO.

LAMP.

Specification of Letters Patent No. 25,493, dated September 20, 1859.

To all whom it may concern:

Be it known that I, JOHN L. DRAKE, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Lamp; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which Figure l, is a vertical central section of my invention. Fig. 2, is a detached external View of a portion of ditto. Fig. 3, is a plan or top view of the cap and chimney holder of ditto. Fig. 4, is a plan or top view of the part shown in Fig. 2.

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

This invention relates to an improvement in that class of lamps that are designed for burning for illuminating purposes, coal oils, of the heavier grades and other hydro-carbons which require a considerable amount of oxygen to support a proper combustion.

The object of the within described invention is to make suitable provisions, whereby the flame may be supplied with a requisite amount of warm oxygen to feed the flame and at the same time the top or cap be kept in a sufficiently cool state to permit the same to be detached by the fingers for the purpose of trimming the wick or supplying the font with oil.

To enable those skilled in the art to fully understand and construct my invent-ion I will proceed to describe it.

A, represents the body of the lamp top. This body is of cylindrical form and is struck up or swaged in suitable form from metallic plate. The lower end of the body A, has a screw thread a, cut on it and the body A, above the screw a, is perforated as shown at b. In the upper part of the body A, a horizontal flanch c, is placed, and attached to the body, said flanch having a circular opening (Z, through which the wick tube B, passes, the lower end of the wick tube being attached to the bottom of the body A.

The wick tube B, extends some distance above the body A, and is constructed with a view of retaining a plurality of wicks for the purpose of augmenting capillarity and thereby insuring a full supply of oil to the flame. This wick tube does not in this place require a detailed description as it was patented by me May 17th 1859, and besides an I ordinary wick tube may be used with the parts comprising this invention.

On the upper part of the body A, at two opposite points of its periphery there are projections e, e, the use of which will be presently shown.

C, represents a cap which is of the usual dome-shapeand D, is the chimney holder which is of annular dish-form encompassing the lower part of the cap. The cap and holder are struck up or swaged from a single piece of metal plate. The top of the cap is slotted as usual as shown at f, and the chimney holder D, is perforated near the base of the cap as shown at 9, see Figs.

.1 and 3. The lower part of the cap C, at

its junction with the chimney holder D, has right angular slots h, made in it at opposite points of its periphery and the cap O, and holder D, are secured to the body A, in consequence of the projections e, e, fitting in the slots h, see more particularly Fig. 1.

011 the wick tube B, a circular disk E, Y

is placed. This disk is some distance below the top of the cap O, and does not touch its sides, a space i, being allowed all around the disk between it and the cap to permit air to ascend to the flame. The disk E, need not be permanently attached to the wick tube but fitted snugly on it so that it may be readily removed when necessary.

In the body A, of the lamp top a shaft j, is placed horizontally, said shaft having a thumb wheel 71', on one end and small toothed wheels Z, Z, near its opposite end. The wheels Z, Z, bear against the wick and raise and lower it as may be required by turning the shaft.

The operation is as follows: The flame is supplied with two currents of air, one passing through the perforations 6, up into the cap O, and being spread by the disk E, strikes against the interior of the cap C, and is deflected from thence so as to impinge against the flame at its base. The other current passes through the perforations g, and up between the glass chimney and the cap C, and impinges against the sides of the flame. The disk E, causes the curone that is unimpeded in its course. In this latter respect the effect is quite similar to that produced. by wire gauze or a perforated division plate which have been used for such purposes, although applied in a different way from that herein shown and of course without the important feature of alternating or spreading out the current of air in its passage to the flame. By having the holder D, perforated at the base of the cap and the holder and cap connected and arranged as shown a large supply of air is admitted to the flame at its outer sides and the exterior of the holder is kept in a cool state so that the fingers may be applied to it and the top unscrewed from the font while the lamp is burning. This is an important feature of the invention for in all lamps for similar purposes that have passed under my observation, a considerable The employment or use of the disk E, ap-.

plied to the wick tube B, and used in connection with the cap C, and arranged relatively with it for the purpose set forth.

JOHN L. DRAKE.

WVitnesses R. S. SPENCER, J. W. COOMBE.

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