Spark-Arrester. Page: 4 of 5
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356,243
ings on the smoke-stack, and the upper end
of this shaft has a rigid pinion, E', which meshes
with a segmental rack, E', that is secured rig-
idly to the outer side of the movable conical
5 shell D.
F designates the screen or sieve,which is ar-
ranged above the open end of the smoke-stack
and concentric therewith. This sieve is made
larger in diameter than the open end of the
to smoke-stack, and it is made of wire of a mesh
sufficiently close or fine to prevent small-sized
sparks or cinders from escaping. The screen
issecured at its upper and lower edges to rings
ff',which are connected by vertical stripsf',
15 and the lower ring, f', is secured in a very se-
cure manner to the ui)per edge of the rigid
shell C, as shown. The upper end of the
screen is thus left open, and it is closed by
means of a conical deflecting cap, G, which is
20 secured and held in place by vertical stay-
rods G',that are arranged exterior to the screen,
and pass through aligned openings in bracket-
ears g' on the cap and rigid conical shell C,
the extremities of thestay-rods being threaded
25 and having binding-nuts y" thereon, so thatthe
rigid shell, the cap, and the intermediate screen
are very securely connected and braced to-
gether, to increase the strength and durability
of the apparatus. It will thus be seen that
30 the ascending smoke and other gaseous pro-
ducts of combustion through the smoke-stack
A are free to pass or escape through the screen
F, while the cinders and sparks which are
carried up by the escaping smoke cannot pass
35 through the screen, and are retained within
and deflected downward thereby, and also by
the conical cap, so that they fall into the com-
partment, where they are retained and emptied
from time to time by adjusting the movable
40 shell to cause its openings to align with the
openings in the rigid shell.
HI designates a vertical shaft, which is ar-
ranged longitudinally and centrally within
the smoke-stack and screen, the lower end of
45 this shaft being journaled or stepped in asuit-
able bearing, h, that is arranged in and secured
to the smoke-stack some distance below the
open mouth or end thereof, while the opposite
or upper end of this shaft is extended through
50 the cap, as shown.
A clearing-brush, I, is affixed to and rotates
with the shaft HI, and the bristles thereof bear
against the inner surface of the screen to sweep
the cinders, &c., that may adhere thereto into
55 the compartments. This brush comprises the
upper and lower radial arms, i, and the verti-
cally- disposed bars i', to which are secured
the bristles i', of wire or other stiff non-com-
bustible material, the bristles being secured
6o to the bars in any suitable or preferred man-
ner.
The vertically-disposed bars i' are secured
at the extremities of the radial arms i, so that
the bristles will come in contact with the
65 screen; andthese vertically-disposed bars may
be arranged parallel with the vertical driving-
shaft H, as shown in Fig. 2, or they may beinclined to the same, as in Fig. 6, so that they
will act to force the cinders and other matter
adhering tothe sieve in a downward direction 70
and thus more effectually force the cinders
into the compartminent or receptacle provided
therefor.
J designates a fan which is located in the
smoke stack beneath the open end thereof and 75
theelearing-brush. Thisfan is provided with
diagonal bladesj, which are arranged at sub-
stantially an angle of forty-five degrees to the
shaft, and the fan is carried by and rotates
with the shaft H. 80
In some instances it may be found advan-
tageous to drive or rotate the fan by utilizing
the upward strong current of the heat, smoke,
&c., that escapes from the engine, which will
act upon the blades thereof and thus rotate 85
the fan-wheel and the driving-shaft, together
with the brush I; but I prefer to employ a wind-
wheel, J', to rotate the driving-shaft and the
devices carried and acuated thereby.
To the upper threaded end of the driving- 9c
shaft, which passes through the conical deflect-
ing cap, is detachably secured a squire spindle,
J', and on this spindle is fitted a square socket,
7, of the rotary wheel J'. This socket I is made
squarein cross-section tofit snugly on thespin- 95
dle, from whence it can be readily removed,
and to this socket is connected or secured in
any preferred manner the radial arms l',whichl
carry the vertically-disposed .conical cups 12
attheirouterends. Thesearms are of any pre- to
ferred number and spaced equidistant apart,
and they are braced and strengthened by the
diagonal intermediate arms, 1', that are suit-
ably secured in place.
The operation of my invention is obvious loS
from the foregoing description, taken in con-
nection with the drawings. The smoke, &c.,
escapes freely through the screen, while the
sparks and cinders are retained therein. The
brush I is revolved with the shaft by either lo
the fan or wind-wheel, and acts upon the sieve
to clear the same of cinders and discharge
them into the compartments, from whence
they are discharged by operating the movable
shell. 115
I am aware that changes in the form and
proportion of parts herein shown and de-
scribed can be made without departing from
the principle of my invention.
Having thus fully described my invention, 120
what I claim as new, and desire to secure by
Letters Patent, is-
1. The combination, with a smoke-stack, of
an outer conical shell secured thereto to form
a compartment and having the discharge- 125
openings, a screen concentric with the stack
and having its upper end closed, a movable
perforated shell surrounding the conical shell,
and means for operating the said shell, sub-
stantially as described. 130
2. The combination, with 'a smoke-stack, of
a rigid conical shell secured thereto at its
lower edges to form an intermediate chamber,
a screen concentric with the stack, a cap sur-
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Reference the current page of this Patent.
Elkins, William Franklin. Spark-Arrester., patent, January 18, 1887; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth171444/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.