US351825A - Lamp-chimney - Google Patents

Description

J. T. BARROW. LAMP GHIMNEY.

No. 351,825. I Patented Nov. 2, 1886.

UNITED STATES PATENT OFFICE.

JQHN T. ,BARROVV, CHICAGO, ILLINOIS.

LAMP-CHIMNEY.

SPECIFICATION forming part gf Letters Patent No. 351,825, dated November 2, 1886.

Application tiled March 22, 1886. Serial No. 196,058. (No model.)

.To all whom it may concern:

Be it known that I, JOHN T. BARROW, of Chicago, Illinois, have invented certain new and useful Improvements in Lamp-Chimneys, of which the following is a specification.

The object is to furnish a chimney made partially of metal and partially of glass, and provided with means for adjusting the draft; and the invention consists in the parts and features hereinafter described and claimed.

The accompanying drawings illustrate the same. Y

Figure 1 is a perspective view. Fig. 2 is ya vertical and Fig. 3 a horizontal section.

The chimney consists of a base portion, A, which is partially covered by a flat top, A', havinga large opening in the center. On this is mounted a rectangular frame, consisting of uprights B, fastened to the top plate, and connectedat the top by bars B'. On top of the frame is a cap, C, which is formed of a plate made to cover a large part of the upper opening of the frame, but leaving an opening in the center somewhat smaller than the opening in plate A', and of vertical sides surrounding the opening and carrying it farther upward, like a line. At the upper corners these sides are slit or beveled, as at c, so that the tops may be bent yin more or less, to contract or vary the size of the opening, for a purpose hereinafter explained. Thecap is preferably hinged tothe ends of two of the side bars, as at b, so that it may be swung off the top of the frame. When so hinged, the top bar may be omitted from the side to which the cap is hinged.

All the'parts thus far described are made of metal, preferably of brass, and the base portion A is .adapted to fit onto the ordinary burner of a kerosene-lamp, -so that the central part of the burner holding the wick will project up about even with the plate A', the fiame rising above it.

The uprights B are made of flat pieces bent to form side iianges, b. On the inside they are provided with` projecting lugs or lips b", adapted to hold sectionsof glass D, or other transparent substance, cut to t between the uprights. When the cap C is removed or turnedback, the sections may be insertedfrom thel top, being slipped in with the edges between the flanges and lips, or taken out for cleaning. Vhen desirable, a renector may be substituted for or placed back of one of the -same width of wick, may be varied. If the top is opened to its full capacity, by bending the beveled parts ont to a vertical vposition the volume of air-draft will be increased, and the name be thereby made narrower and higher, but if, on the other hand, the opening at the top is contracted, the air is thus regulated, and the flame is thereby made wider and not so high as under the condition first mentioned. Whatever be the theory, the varying of the size of the chimney-opening at the top produces the above-named effects on the fiame, and the advantage of better adapting the draft to any given size of flame is afforded by the use They are, moreover, not so liable to be broken by the heat as a chimney made of one piece of glass, because the sections are permitted to eX- pand separately. The metal portion, when made of polished brass or ornameuted,presents a very handsome appearance. For the purpose of ornamentation, additions may be put `on any of the parts, as by extending the cap farther down over the bars B', and curving or filagreeing it in any fanciful manner; also by extending the slit portion of the cap further upward and curving the extended portion outward in any'tasty way. Such ornamentation, however, shouldnot change the essential structl nre, and would not constitute any part of the invention. For the purpose of relieving the cap somewhat from the heat of the flame, one of the sections D may be made shorter than the rest, as seen at d, to allow the cool air to pass in under the cap.

It will be observed that the advantages secured by the cap provided with means for varying the sizeof the chimney-opening at the sections are easily made, and at trifling cost.

IOC)

top would be produced by such cap in combi- 2. The combination of alamp-ohimney with nation with any eonnnou form of chimney, the a cap, as G, of sheet metal, having upwardlycap being merel y fitted to the top of the projecting sides surrounding the air-passage chimney. at; the top of the chimney, provided with slits 5 XVhab is elai med isn c, as and for the purpose specified.

l. As an lmprovenlent 1n lailip-vclillnneys, JOHN T. BARROV.

the combination of the metal base A, plate A',

uprights B, bars B', cap C, with slits c at the Xlfitnesses:

top, and transparent sections D, substantially JNO. H. VVHIPPLE, 1o as and for the purposes specified. l JAMES R. DEAN.

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