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Патент USA US3055170

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Sept. 25, 1962
'r. w. DWYER
3,055,160
SPAR-K ARRESTER
Filed Dec. 14, 1960
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INVENTOR.
THOMAS WILLIAM owvsg
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3,055,160
SPARK ARRESTER
Thomas William Dwyer, Badger, Grand Falls Dist,
Newfoundland, Canada
Filed Dec. 14, 1960, Ser. No. 75,832
4 Claims. (Cl. 55-482)
3,055,160
Patented Sept. 25, 1962
2
inside of the ?ue pipe 12. The diametrically opposite
side of the member 16 is provided with a non-circular
recess 24 within which a similarly shaped non-circular
stud portion 26 of a dry shaft 28 is received. This shaft
28 is rotatably mounted upon the diametrically opposite
side of the pipe 12 from the bearing pin 22 by means
of a lock pin 25, and is used to rotate the main block
ing member 16 by means of a handle 30‘ secured to the
This invention relates to fines and more particularly
shaft 28 by a lock pin 29. A hand grip 32 is secured
to a spark arrester therefor.
It is an object of the present invention to provide a 10 to the outermost end of the handle 30 to facilitate the
rotation thereof.
spark arrester for preventing the ?ow of sparks outwardly
It will now be recognized that in actual use, all solid
through a ?ue of a burner of any particular type.
particles are prevented from ?owing upwardly through
A further object of the present invention is to provide
the ?ue pipe 12 by the blocking member 16. However,
a spark arrester of the aforementioned type which can be
manually actuated to dislodge solid particles from gas ex 15 ?ue gases are permitted to escape through the ports 18.
In the event that solid particles block some of the pas~
haust ports, thus assuring proper control at all times.
sages through the ports 18, the main body member can
All of the foregoing and still further objects and ad
be briskly rotated by the handle 30, to dislodge such
vantages of this invention will become apparent from a
particles therefrom, thus providing for the continued op
study of the following speci?cation, taken in connection
20 eration of the assembly.
with the accompanying drawing, wherein:
While this invention has been described with particular
FIGURE 1 is a fragmentary side elevational view of a
?ue having a spark arrester made in accordance with
reference to the construction shown in the drawing, it is
the present invention;
to be understood that such is not to be construed as im
parting limitations upon the invention, which is best de
‘FIGURE 2 is an enlarged framentary cross sectional
view of the main operating parts of the assembly shown 25 ?ned by the claims appended hereto.
Having thus described my invention, I claim as new
in FIGURE 1;
and desire to secure by Letters Patent:
FIGURE 3 is a fragmentary perspective view of the
11. A spark arrester comprising, in combination, a con
side of the blocking member forming a part of the present
duit for exhausting combustion gases, a hollow spherical
FIGURE 4 is a view similar to FIGURE 3, showing 30 member having its surface perforated, the perforations
invention;
the opposite side of the main body portion;
FIGURE 5 is an enlarged fragmentary cross sectional
view of the main operating parts of the assembly shown
in FIGURE 1;
permitting said gases to flow therethrough, said member
blocking the passage of solid particles therethrough, and
manually operated means for actuating said member to
discharge solid particles from blocking gas ?ow through
FIGURE 6 is a perspective view of a shaft forming 35 said perforations.
2. A spark arrester as set forth in claim 1, wherein
another part of the present invention; and
said conduit comprises a substantially cylindrical ?ue pipe.
FIGURE 7 is a side view of the assembly shown in
FIGURE 1.
3. A spark arrester as set forth in claim 1, wherein
said perforations are spaced substantially equally around
Referring now to the drawing, a spark arrester as
sembly 10 made in accordance with the present inven 40 the surface of said spherical member.
4. A spark arrester as set forth in claim 1, wherein
tion is shown to include a main conduit 12 which serves
said spherical member is rotatably supported at one side
as a ?ue for exhausting gases from a combustion unit 14.
Mounted within the longitudinal bore of the cylindrical
?ue pipe 12 is a main body member 16 of generally
upon one side of said conduit, and said manually operated
means comprises a crank rotatably mounted upon a dia
hollow spherical con?guration having a plurality of ports 45 metrically opposite side of said conduit having a non
circular portion in driving engagement with the adjacent
18 extending through the surface thereof around the en
tire surface area of this member.
diametrically opposite side of said member.
It will be evident from FIGURE 2 that the spherical
member 16 virtually blocks the ?ow of all solid particles
through the conduit 12 from the lower to the upper end 50
thereof, while permitting the ?ow of exhaust gases there
through by means of the ports 18.
One side of the main body member 16 is provided
with a cylindrical socket 20 which rotatably receives the
inwardly projecting end of a mounting stud 22 carried 5
References Cited in the ?le of this patent
UNITED STATES PATENTS
509,892
526,828‘
Gray _________________ __ Dec. 5, 1893
Bell __________________ __ Oct. 2, 1894
544,865
986,599
2,061,247
Peterson _____________ __ Aug. 20, 1895
Sizer _________________ __ Mar. 14, 1911
Nordstrom ___________ __ Nov. 17, 1936
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