Year: 1888

page_text: Date of Application, 10th Feb., 1888
Complete Left, 22nd Feb., 1888
Complete Accepted, 29th Mar., 1888
that is, the escape of smoke into rooms.
Common Camion Survey macys
For this purpose apparatus is employed the nature of which I will proceed to
describe with reference to the annexed sheet of illustrative drawings, whereof
Fig. 1 illustrates a fire place provided with the improved apparatus ;
Fig. 2 is a horizontal section;
Fig. 3 is a side elevation; the plate D being shown closed;
Fig. 4 is a vertical section.
The dotted linos show the position of plate D when open.
The apparatus comprises two removable parts, viz.: a lower part or box A provided
with feet a, a, and a hollow guiding extensjon B.
The front or face b of the box A is slightly inclined forward in an upward direction
and is provided with a suitable number of apertures G, G .., for the passage
of a portion of the products of combustion.
The front or face 6¹ of the extension B forms a continuation of the face b; that is
to say, the face 6¹ is similarly inclined, in such a manner as to somewhat contract the
entrance to the chimney at C and thereby increase the velocity of the flow of gases
therethrough.
The entrance to the chimney it will thus be understood is divided into two namely the
opening corresponding to the area or passage through the extension B and the opening
corresponding to the remaining area of the chimney.
As however many chimney's sinoke only occasionally, and to a greater or less extent
according to circumstances, the box A is provided inside with a plate or flap D that is
capable of being partly rotated about pivots d, d, by means of a handle E. The plate
or flap D can be adjusted and maintained in any suitable position by means of notches

page_text: formed in the handle E and designed to engage with a knife edge e.
can be regulated according to requirement.
Thus the draught
With the portion of products of combustion entering the box A by the
apertures G, G.
there is a much smaller admixture of air than with the
portion rising from the grate and passing up through C. The portion passing
through B also has a higher temperature being heated by the box A with which the
fire has contact, and thereby acquiring a higher ascensional velocity which acts to
improve the draught through the front passage C, the gases passing up which would
otherwise have only the normal ascensional force. These latter are thus caused to
flow up with increased velocity so that the formation of smoke is either entirely 1
obviated, or, if smoke be produced, the same is prevented from hovering over the grate
and escaping into the room or apartment.

page_text: Fig. 2 is a norizontal section.
Fig. 3 is a side elevation, the plate D being shown closed.
Fig. 4 is a vertical section.
The dotted lines show the position of plate D when open.
The apparatus comprises two removable parts, viz. a lower part or box A provided
with feet a, a, and a hollow guiding extension B.
The front or face of the box A, is slightly inclined forward in an upward direction
and is provided with a suitable number of apertures G, G, for the passage of a portion of
the products of combustion.
The front or face b¹ of the extension B forms a continuation of the face b; that is
to say, the face b' is similarly inclined, in such a manner as to somewhat contract the
entrance to the chimney at C, and thereby increase the velocity of the flow of gases
therethrough.
The entrance to the chimney it will thus be understood is divided into two namely
the opening corresponding to the area or passage through the extension B and the
opening corresponding to the remaining area C of the chimney.
As however many chimneys smoke only occasionally, and to a greater or less
extent according to circumstances, the box A is provided inside with a plate or flap D
that is capable of being partly rotated about pivots d, d, by means of a handle E.
The plate or flap D can be adjusted and maintained in any suitable position
by means of notches formed in the handle E and designed to engage with a knife
edge e.
Thus the draught can be regulated according to requirement.
With the portion of products of combustion entering the box A by the apertures G, G,
there is a much smaller admixture of air than with the portion rising from the grate
and passing up through C.
The portion passing through B also has a higher temperature being heated by the
box A with which the fire has contact and thereby acquiring a higher ascensional

page_text: velocity which acts to improve the draught through the front passage C, the gases
passing up which would otherwise have only the normal ascensional force.
These latter are thus caused to flow up with increased velocity so that the formation
of smoke is either entirely obviated, or if smoke be produced, the same is prevented
from hovering over the grate and escaping into the room or apartment.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
Apparatus substantially as hereinabove described with reference to the drawings for
the purpose anonified
Dated this 22nd day of February 1888.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.