US115458A - Improvement in lamp-chimneys - Google Patents

Description

" sAMuELw.*FowLr-:R. lmpfrolement in Lamp Chimneys.

Patented 'May 30,1871.

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'NEED STATES 1 IM'PRovE-Mi-:NT IN Speciicaiion forming To all whom it may concern: i

Be it known that I, SAMUEL W. FowLnR, of Brooklyn, in the county of Kings and State of New York, have invented anew and Improved Lamp-Chimney; and I hereby declare that the following is a full, clear, andexact description of the same, reference being had y tothe accompanying drawing which forms a y part of this specification. p

y Myinvention consists in the new article of "manufacture of a lamp-chimney, constructed with a circular base, an oval or elliptical iiue having straight sides and-a contracted neck, .l the latterr provided with an oval or elliptical y iopening through it, the area of which open-- ing is lessthan the area of the opening at the top of the flue, by `which construction' I produce` a chimney adapted for use with any ordinary kerosene-burner, and one which possesses `all of the indestructible or salaman- 3 `drine qualities of the students-lamp chimney,` so Welland favorably known in the market.

In the accompanying drawing, Figure lis a side `elevation of my improved lamp-chimney. Fig. 2 is a vertical central section thereof taken'on the plane of the line a: sc, Fig. 4, which linefis the conjugate axis of ther chimney.` Fig. 3 is alsoavertical central section l thereof, taken on the plane of the line y y,- yFig. 4, which line is the transverse axis of n the chimney. Fig.` 4 is a. plan view, as seen when looking into or g down upon the top of 7 the chimney. A designates the base of the chimney, which `1 is circular in form` and adapted to the style of burner with which it is to be used. `I have i `illustrated it as adapted `for use with a burner l of` the class?` termed lsun burners, but, of l "course,t11e construction of the base is to be l" Il modiriedso` as to t the style of burner with u which itis tobeused.` f Bdesignates the flue of the chimney, whicliis the term I apply to` 1 that partof the chimneyfsabovethe contract- `edfpart or neck.` This luelis, elliptical or oval Ain cross-section, and the saidue is construct! ed with straight sides, as `distinguished from globe-chimneys, but' the sides are not neces` sarily parallel, but `may be` so. I, however, preferably makethe iiue tapering, the sides y converging or approaching each other asthey LAMP-CHIMNEVS.

part of Letters Patent No. 115,458, dated May 30, 1871.

near the upper terminus of the ue. C des-l ignates the contracted part or neck of the chimney, and this neck is provided with an oval or elliptical opening, a, through it. The

,area of this opening through the neck is less than the area`.of the opening at the top of the chimney, and, of course, of lesser area than the opening at the bottom of the Achimney.

By this construction the heat ofthe ame first reaches the contracted part or neck G,

and from this part the chimney expands in both directions, more rapidly in an upward direction; and inasmuch as no part of the chimney above the neck overhangs the flame so as to be reached by direct rays of heat, the

expansion of the chimney progresses from'a given part through the whole chimney, and to this freedom of the chimney (by reason of of its construction) from unequal expansion and contraction I attribute its remarkable qualities.

In order to enable aperson to quickly place the chimney in a proper position on the burner, so that the Wick-tube shall be parallel with the opening in the neck and not crosswise, I provide one or both sides of the base of the chimneywith depressions or with ribs,

into or against which a suitable projection in the burner rests or abuts for'instance, an

upwardly-projecting arm onl a sun-burner would spring in between the ribs b b, and not onlyindicate y a proper adjustment, but 4keep the chimney from working round when adjusted.

From the foregoing description it will be observed that, while I retain the circular form ofthe base part of the students-lamp chimney, I construct the ilue and the openingin the contracted neck of` an oval or ellipticalV form, thereby producing a chimney made and adapted for use with the ordinary kerosenelamp burners, which have iiat wick-tubes,.and by reason of this construction I am enabled to placein the hands of the public a chimney capable 0f being used with any ordinary keroseme-burner, possessing all of the qualities of the students-lamp chimney, whichv latter has a world-wide reputation for durability and salamandrine qualities.`

What I claim as my invention, and desire less are-a than the opening; at the top of the to secure by Letters Patent, is' chimney, or at any point along the flue, sub- -The new article of manufacture of a larnpstantially as herein specified. chimney, constructed with a circular base, a SAMUEL W. FOWLER. contracted neck, an oval or elliptical flue, Vtnesses: when said line is provided with straight sides JNO. E. SAYLES, and when the opening through the neck is of M. M. LIVINGSTON.

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