US1742198A - Spark arrester - Google Patents

Description

Jan. 7, 1930. G. CARPENTER 1,742,198

SPARK ARRESTER Filed April 1, 1924 4A7 INVENTOR ATTORNEYS Patented Jan. 7, 1930 UNITED STATES Application filed April 1,

My invention relates to that class of devices, inthe art of arresting, cooling and collecting, of sparks accompanying the prod nets of combustion in locomotive engines,

such as set forth and described in my prior applications for patents and which bear Serial Numbers 693,185 and 693,186 each of which was filed Feb. 16, 1924, and has for its object to locate a helically formed member forming a spiral passage, which I employ and which imparts a centrifugal force to the gases, in a position, with relation to the exit stack, that will cause it to function at sub stantially the central point of the gas flow. Another object is to simplify the construction to a great degree and yet sacrifice no efiiciency thereby.

My invention can be more clearly understood by reference to the accompanying drawings, which illustrate a preferred form of construction, in which Fig. 1 shows a longitudinal sectional view of the forwardpart of an engine fitted out with my device, and

Fig. 2 shows a transverse sectional view' taken on the line 22 of Fig. 1. 1

Referring to the accompanying drawings the reference numeral 10 is used to indicate numeral 11 the smoke box, the numeral 12 the smoke stack, and 13 the exhaust jet, all of which is common to the ordinary type of engines. However, in my construction the smoke stack 12 where it projects downwardly into the smoke box has been materially shortened and as a consequence the jet 13 has been correspondingly elevated, for it is necessary to have the jet located in close proximlty to, and centrally of, the lower open end of the stack.

Midway between the fire tubes 10 and the smoke stack 12, and in the said smoke box, I have secured a vertical partition 14 and extending forwardly therefrom to a point beyond the smoke stack 12, andslightly below the same, is a horizontally disposed portion 15, and extending downwardly from the forward end of this partition 15 to the lower end of the smoke box is a third partition 16. Thus it is apparent the three partitions the fire tubes of a locomotive engine, the

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SPARK ARRESTER i 1924.- Serial No. 703,392.

14, 15 and 16, form a chamber in the smoke box; which except as will be hereinafter set forth is entirely separated from the smoke chamber, and the chambenthus formed I designate as my collection chamber 17.

In this co'llection chamber 17, and preferably centrally thereof, and' extending between and secured to the partitions 14 and 16, is a horizontally secured cylinder 18, which is closed at its'rear end. Surrounding this cylinder 18, and evenly spaced there from, is a second, or outer, cylinder19, and between these two cylinders I have mounted a helically formed member, its blade contacting the outer surface of theinner cylinder 18 and the inner surface of the outer. cylinder 19. An opening is provided through the partition 14 into the space between the two said cylinders and another opening is provided through the partition l-6leading from the space between the cylinders to the forward end of the smoke box. Thus it is seen gases from the fire tubes can pass through the rear end of the smoke box, through the spiral passage between the cylinders and into the forward end of the smoke box, thence upwardly and through the smoke stack 12. As the action of the jet produces a high velocity a strong centrifugal force is imparted to the gases, through the function ing of the hclically formed member as they pass through the spiral passage formed therein, and this operates tothrow the particles of solids (commonly called sparks) outwardly to the inner surface of the outer cylinder 19. As it is my purpose to arrest and collect these unconsumedsolids, I have attached a plurality of baflies 20 to the inner surface of this cylinder 19, and they are preferably arranged to oppose the flow of the gases. The particles strike these baffles and i are arrested thereby and then pass through the openings 21 (which I have provided in the cylinder wall in close proximity to the said baflies) into the collection chamber 17 where they, by gravity, fall to the bottom thereof. I have also provided a door 22 in the base of the collection chamber and by opening this door the collected solids may be cleaned out of the collection chamber 17.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States, is:

A spark arrester for locomotive engines employing a fire box, comprising a smoke stack; a smoke box; a chamber, provided with openings, positioned beneath the smoke stack and in the smoke box; a helically formed member mounted in said chamber,

its blade contacting the inner wall of the chamber, to form an open-ended spiral passage through the chamber; baflles on the inner surface of the chamber, a bafile being positioned adjacent each of the openings in the wall; an exhaust element, centrally located beneath the smoke stack, the parts being so arranged as to conduct the smoke from the fire box to the said chamber and through the aforesaid spiral passage before it reaches the smoke stack, substantially as shown and described.

GUY CARPENTER.

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