US111507A - Improvement in spark-arresters - Google Patents

Description

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Letters Patent No. 111,507, dated February 7, 1871.

-IMPROVEMENT IN SPARK-ARRE-STERS.

The Schedule referred to ln these Letters Patent and making part of the same.

To au 10h-am t 'may concern'.-

Be it known that I, THOMAS A. ANDREWS, Jr., of Philadelphia, Pennsylvania, havel invented a new and useful Improved Spark-Arrester for the smokestacks of locomotive-engines.

The following is a specification of my invention In the drawing- A Figure 1 is a longitudinal vertical section of a smoke-stack and its exterior casing, and of my sparkarresting devices.

Figure 2, a perspective of the series ot dish-shaped or lianged plates c, d, and e, detached.

Figure 3, a plan of the casing, (the top g being removed,) designed to show the shield or open cover m..

In fig. 1-

a represents a smoke-stack, and b the casing of the saine, both of ordinary construction.

0, d, and e, figs. 1 and 2, represent dish-shaped or fiauged plates, united together by several cross-braces j, so as to leave clear spaces between the plates for draft, as shown.

The plates are open in the middle. They have flaring or tapered sides, and they are set in the top of the casing b, as shown in fig. 1, and secured by bolts passed through anges of the casing b, dish c, and removable top g, as at h, tig. 1.

e', iig. 1, is a casting, both faces of which are con- Vex, the top face being almost flat.

It is supported by rods, two of which, j and k, are shownin fig. 1.

The cast-ing i is designed to correspond in horizontal area with the bottom of the lowermost dish c, and is arranged directly below this dish, leaving a little space between the two.

m, Iig. 3, is au open cover, a little larger in its middle part, in', than the `middle openings Ain dish c and top g.

.Ihe cover m is secured between the top g andthe casing b by the bolts 71, above mentioned.

lhe operation of the parts described is such that the sparks or cinders coming up through the smokestack a strike the lower face ofthe casting i, and are reected, and striking the dishes 0,11, and e, and their flanges c', d', and c' are arrested and caused to drop down between the casing b and the smoke-stack.

'lhey are removed as often as desired through the covered opening n, fig. l; I prefer to ernploy the open cover m, tig. l, but it may be dispensed with without material disadvantage.

The flanges c', d', and' c' of the dishes c, d, and e are a little' more in breadth than the distances between t-he dishes.

The' casting t presents the segment oi' a sphere to the ascending current of sparks, and this forinis preferable to the conical formv hitherto sometimes employed.

I claimrlhe combination of the casting i, the series of dish-shaped or flanged plates c, d, and c, and the open cover nl., with the casing b, smoke-stack a, and remov-y able top g, in the manner and for the .purpose substantially as set forth.

THOMAS A. ANDREWS, Jn.

Witnesses J. WARREN CAILSTON, GEORGE E. BUGKLEY.

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