An improved Cowl or chimney ripe.
Year: 1896

page_text: An improved Cowl or chimney ripe.
I JAMES HENRY BONEHILL of No. 181 Grove Lane, Smethwick, near Birmingham
Gas and Hot Water Engineer do hereby declare the nature of this invention
to be as follows:-
My Invention relates to an Improved Cowl or Chimney Pipe designed and
intended for the cure of smoky Chimnies caused by down currents. It consists
of two galvanized iron Cylinders of unequal length and diameter, the small and
principal one being centrally fixed within the larger thus leaving a space between
the two. The top of the main Cylinder is fixed midway between the top and
bottom of the larger one and thus a sort of chamber is formed which receives
the smoke as it emerges from the main shaft and whose sides being so much
above the top of the main shaft form a protection thereto. The main shaft is
still further and more effectually protected by a Saucer shaped Disc of Iron
whose diameter is slightly larger than that of the main shaft. This Disc is
loosely suspended a few inches above the main shaft with its convex side uppermost
and is sustained by a rod of iron passing through a bracket attached to the top
of the larger Cylinder. This Disc being loosely suspended while effectually pre-
venting the admission of wind into the Shaft offers no impediment to the cleansing
thereof as the Sweep's Brush easily lifts it out of its place and on being withdrawn
the Disc readily returns to its former position. The larger Cylinder is surmounted
with an ornamental open Work which improves its appearance and also serves to
divide any wind that may be blowing and which then with diminished force
enters the aforesaid chamber and passing over the top of the Disc drives the smoke
down the space between the two Cylinders into the outer atmosphere.
Dated this 3rd day of November 1896.
JAMES HENRY BONEHILL.
COMPLETE SPECIFICATION.
An Improved Cowl or Chimney Pipe.
I JAMES HENRY BONEHILL of No. 181 Grove Lane, Smethwick, near Birmingham
Gas and Hot Water Engineer do hereby declare the nature of this invention
O and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My Invention consists of two galvanized Iron Tubes, or Cylinders of unequal
length and diameter, the smaller and principal one being centrally and per
manently fixed within the larger one, so leaving a space between the two. The

page_text: mouth of the smaller Cylinder being fixed midway between the top and bottom
of the larger one, a receptacle, or chamber is hereby formed into which the
smoke is discharged as it emerges from the smaller one. The upper edge of the
larger cylinder being elevated above the mouth of the smaller one serves to
divide and lessen the force of any wind that may be blowing, and thus diminishes
the probability of the smoke being driven down the chimney.
As a further and more complete protection against down draughts I suspend a
saucer-shaped disc of iron, slightly larger than the external diameter of the smaller
cylinder, with its convex side uppermost, at a convenient distance above its mouth.
This disc is connected' with a bracket attached to the top of the larger cylinder
by means of a rod inserted in a hole therein, the hole being sufficiently large to
permit the easy lifting of the disc by the sweep's brush in the act of cleaning
the Chimney.
That my Invention may be more readily understood I have appended hereto
One sheet of Drawings which I now proceed to explain. Figure 1 being an
elevation and Figure 2 a sectional elevation of the cowle.
A. Is the smaller Tube or Cylinder, or main shaft of the cowle.
B. is the larger Tube or Cylinder.
C. is the upper portion of the larger cylinder which forms a receptacle or
chamber into which the smoke is discharged as it emerges from the smaller
cylinder.
D. is the saucer-shaped disc.
E. is the rod by which the said disc D is loosely suspended from the bracket
above and prevented from dropping too far by the cup-shaped head G.
F. is the Bracket.
H H. represents the annular space between the Cylinders down which the
smoke may be driven and by which it escapes into the outer atmosphere.
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 a cowle or chimney pipe consisting of two unequal sized galvanized tubes
or cylinders the smaller one being centrally and permanently fixed within the
larger. Above the mouth of the smaller cylinder is suspended a saucer-shaped
disc of iron which being free to move up and down offers no impediment to the
ordinary cleaning of the chimney, while at the same time it effectually excludes
any wind that may be blowing, which, if not so excluded would drive the smoke
down the chimney shaft.
Dated this 8th day of July 1897
JAMES HENRY BONEHILL.