Improvements in Ventilators and Chimney Tops.
Year: 1895

page_text: Date of Application, 13th June, 1895-Accepted. 3rd Aug., 1895
COMPLETE SPECIFICATION.
Improvements in Ventilators and Chimney Tops.
CHARLES FIELD, 9 Battye Street Dewsbury, Yorks, Joiner and Builder do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
To prevent the smoke in chimneys from being blown down the inside of the
chimneys, and so as to cause an up-draught, or assist an otherwise deficient
up-draught; and also to promote ventilation of rooms or enclosed spaces, I make
my chimney tops or ventilators on an improved plan. In order that my invention
may be more fully understood I have appended hereto a sheet of drawings and
hereinafter refer to said sheet of drawings:
Fig. 1. shows a sectional view of a chimney top or ventilator made of sheet or
cast metal, clay, papier-machié or other suitable material, or a combination thereof.
Part "B" Fig. 1. can be made either of the same diameter from bottom to top, or
may be of greater diameter at bottom or top as desired. At the lower end I place
a flange "F" for support and stability, when required to be fixed to masonry.
The flange may be placed higher up part "B" if required, as shewn by dotted
line "J."
Fig. 2. shows sectional view of a similar chimney top or ventilator, but made
with part
"D" of equal diameter so as to fit into soil-pipes and the like. It is
held in position by the studs or brackets "G" "G" "G." Figures 1 and 2
being of similar design except as to their lower parts I shall hereinafter describe
Fig. 1.
Fig. 3 is an enlarged view of my sugar-loaf shaped cover or cone, marked "A"
in Figures 1. and 2. This part "A" is made either solid or hollow, but if hollow
the base thereof is made up to prevent any accumulation of smoke or air within the
sugar-loaf shaped part "A," and I make the cover "A" with its sides slightly
bowed or convex as shewn.
"
On looking at Fig. 1. it will be seen that the upper rim or edge "E" of part B
is slightly enlarged or lipped so as to facilitate the exit of smoke or bad air from
within the chimney, and also to shoot off or turn the up-draught of fresh air, which
enters between the bottom of part "C" and side of "B," from coming into contact
with the bottom of part "A." The diameter of the base of part "A is made
slightly larger than the diameter of the top of part "B." The cover or part "A"
is held in position over part "B" by two or more supports "H
3766 H" "HI" which
are of such length as to allow free exit to the smoke or air. Part "C" Fig. 1 is
the outer case or shell and is supported and attached to part "B" by suitable studs
or brackets marked "I." "I." This outer case or shell part "C" surrounds
part "A" and the upper end of part "B" and is of larger diameter at its upper
end than it is at its lower end.
My motives in placing the various parts marked "A" "B" and "C" in their
relative positions as shewn in Fig. 1 are as follows. In calm weather the smoke or
bad air will ascend out of part "B" through the opening under "A," passing up
over top of "A" and "C" assisted by the fresh air up-draught entering, as before
stated, under bottom of part "C." In rough and boisterous weather the wind will
assist the up-draught in the chimney because if wind goes into the top portion of
part "C" it cannot get into part "B" owing to the base of "A" being of larger
dimensions than top of "B" but will pass downwards outside "B" and escape as

page_text: shown by arrow at left hand (or otherwise according to the direction of the wind).
The outward bend or lip at top edge of part "B" is as stated above, for the
purpose of shooting or deflecting the current of the up-draught of fresh air away
from bottom of "A" and thus assisting to carry off the smoke or bad air coming
from interior of part "B." Another purpose I have for making the base of
part "A" larger than the top of part "B" is to prevent any water, or melted snow,
or wind getting into part "B." The outer case or shell "C" is made wider at the
top and carried higher than the summit of part "A. so as not only to allow freer
exit for the smoke in fine weather, but to gather more wind in stormy weather and
thus force the smoke downwards over the top of part "A" and out at the bottom
of part "C" passing in transit entirely past the opening at top of part "B"
because of the said opening being protected by the larger diameter of bottom of
part "A."
**
"
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
1st. The sugar-loaf shaped cover or cone marked "A."
"
2nd. The combination, arrangement and relative positions of the outer case C
the sugar-loaf shaped cover or cone "A," and the lower portions "B" and "D
as shown in Figures 1. and 2.
Dated this Eleventh day of June 1895
"
"
CHARLES FIELD.
Edward Henry Vero,
Dewsbury, Agent.