Improvements in Ventilators, Smoke Preventers for Chimney Tops, Soil Pipes, Ventilating Shafts for Drains, for Public, Domestic, or Factory Buildings.
Year: 1894

page_text: Date of Application, 24th Apr., 1894
Complete Specification Left, 23rd Jan., 1895-Accepted, 9th Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Ventilators, Smoke Preventers for Chimney Tops,
Soil Pipes, Ventilating Shafts for Drains, for Public, Domestic,
or Factory Buildings.
ALFRED CLIFFORD Claremont House Hawley Road near Dartford Kent
Plumber and Sanitary Engineer do hereby declare the nature of this invention to
be as follows
My invention consists of a louvre cap ventilator of any shape or plan, this is
composed of several louvres fitted over one another to three or more uprights E
Figures 1, 2 & 3 upon the top and bottom of the louvres are fitted those portions
of my invention which I now describe.
Above the top louvre is fitted a ring or other shape band A of iron or other
metal which is rivetted or soldered to the uprights E which support the louvres
and bottom ring or band H. The space within the band A is a little larger than
the top louvre, within this band is a round or other shaped flap B, of iron or any
other metal hinged to band at C. This flap will prevent a down draught but when
cleaned by sweep's brush G Fig. 1. it acts automatically the brush pushing it open
and on being withdrawn catches the wire F and closes the flap which rests on a
small stop. The hinge C and flap B is formed out of one piece of metal and works.
upon a spindle which is rivetted or soldered to band A, the bottom ring or band H
is likewise of iron or other metal of any suitable thickness and is rivetted or
otherwise fastened to the upright E, or in a cylinder of any length as shewn in
Fig. 2. The ring or band H is made in various sizes according to circumstances
and is passed over top of chimney or pipe as far as the stops which are rivetted
on uprights E to prevent louvre cap from slipping too far over chimney top. The
thumb screws J which are tapped into bottom ring or band H are then screwed
firmly against the chimney and keep the cap securely in its place. The louvre
ventilator is a great improvement on the ordinary one, very easily fixed, easily
cleaned and can be made of any suitable metal. When used for soil pipes or
ventilating shafts the top is fixed and the portion between louvres and top is
perforated as shewn in Fig. 3.
Dated this 23rd day of April 1894.
COMPLETE SPECIFICATION.
Improvements in Ventilators, Smoke Preventers for Chimney Tops,
Soil Pipes, Ventilating Shafts for Drains, for Public, Domestic,
or Factory Buildings.
ALFRED CLIFFORD Claremont House Hawley Road near Dartford Kent
Plumber and Sanitary Engineer 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, with reference to the drawings
accompanying the Provisional Specification:-
My invention consists of a louvre cap ventilator of any shape or plan, this is

page_text: composed of several louvres fitted over one another to three or more uprights E
Figures 1, 2 & 3, upon the top and bottom of the louvres, or any other contrivance,
are fitted those portions of my invention which I now describe. Above the top
louvre is fitted a ring or other shaped band A of iron or other metal, which is
rivetted or soldered to the uprights E which support the louvres and bottom ring
or band H. The space within the band A is a little larger than the top louvre,
within this band is a round or other shaped flap B of iron or any other metal
hinged to band at C.
This flap will prevent a down draught but when cleaned by sweep's brush G,
Fig. 1, it acts automatically the brush pushing it open and on being withdrawn
catches the wire F and closes the flap, which rests on a small stop. The hinge C
and flap B is formed out of one piece of metal and works upon a spindle which is
rivetted or soldered to band A. The bottom ring or band H. is likewise of iron
or other metal of any suitable thickness and is rivetted or otherwise fastened to the
uprights E, or in a cylinder of any length as shewn in Fig. 2.
The ring or band H is made in various sizes according to circumstances and is
passed over top of chimney or pipe as far as the stops I, which are rivetted on
uprights E to prevent louvre cap from slipping too far over chimney top. The
thumb screws J which are tapped into bottom ring or band H are then screwed
firmly against the chimney and keep the cap securely in its place. The louvre
ventilator is a great improvement on the ordinary one, very easily fixed, easily
cleaned and can be made of any suitable metal. When used for soil pipes or
ventilating shafts the top is fixed and the portion between louvres and top is
perforated as shewn in Fig. 3.
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 1
claim is
The combination of the different parts described in this Specification and
illustrated in the sheet of drawings (left with the Provisional Specification), for
the purposes herein mentioned and 1 do not confine myself to the exact shapes
shewn or the size or the material used in the construction.
Dated this 22nd day of January 1895.
ALFRED CLIFFORD.