IMPROVEMENTS IN CHIMNEY CAPS, TERMINALS, OR VENTILATORS
Year: 1878

page_text: LETTERS PATENT to John Edward Carter, of Stanhope Street, Euston Road,
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN CHIMNEY
CAPS, TERMINALS, OR VENTILATORS."
Sealed the 30th August 1878, and dated the 28th June 1878.
PROVISIONAL SPECIFICATION left by the said John Edward Carter at the
Office of the Commissioners of Patents on the 28th June 1878.
JOHN EDWARD CARTER, of Stanhope Street, Euston Road, in the County of
Middlesex. "IMPROVEMENTS IN CHIMNEY CAPS, TERMINALS, OR VENTILATORS."
The Invention has for its object improvements in chimney caps, terminals, or
ventilators, whereby a current is created up a flue or ventilator shaft, and the
interior of the cap, terminal, or ventilator is kept constantly clean.
For this purpose I form a chamber at the upper end of the cap, terminal, or
ventilator, at the top and bottom of which I fix cross bearings or supports to receive
and guide a spindle, the lower end of which is supported by a glass or earthenware
bearing to prevent friction, and thereby dispense with the use of oil. To this
spindle are fixed straight blades or vanes which are parallel to or slightly inclined
to the spindle and which are curved on their faces, and at their outer edges nearly
touch the interior of the chamber.
The upper end of the spindle has fixed thereon a rotating head provided with
openings therein, and with a number of concave vanes projecting therefrom, which
by the action of the wind thereon cause a rotary motion, always in the same
direction, to be imparted to the head and spindle, whereby an upward current is
generated in the interior of the flue or ventilating shaft, and at the same time the
Prine R71

page_text: interior of the chamber at the upper end of the cap, terminal, or ventilator is kept
clean by the action of the internal vanes or blades thereon.
A door may be provided in the cap, terminal, or ventilator for the purpose of
facilitating the cleansing thereof.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by 5
the said John Edward Carter in the Great Seal Patent Office on the 27th
December 1878.
John Edward CARTER, of Stanhope Street, Euston Road, in the County of
Middlesex. "IMPROVEMENTS IN CHIMNEY CAPS, TERMINALS, OR VENTILATORS."
The Invention has for its object improvements in chimney caps, terminals, or 1
ventilators, whereby a current is created up a flue or ventilator shaft, and the
interior of the cap, terminal, or ventilator is kept constantly clean.
For this purpose I form a chamber at the upper end of the cap, terminal, or
ventilator, at the top and bottom of which I fix cross bearings or. supports to receive
and guide a spindle, the lower end of which is supported by a glass or earthenware 1
bearing to prevent friction, and thereby dispense with the use of oil. To this
spindle are fixed straight blades or vanes which are parallel to or slightly inclined
to the spindle and which are curved on their faces, and at their outer edges nearly
touch the interior of the chamber.
The upper end of the spindle has fixed thereon a rotating head provided with 2
openings therein, and with a number of concave vanes projecting therefrom, which
by the action of the wind thereon cause a rotary motion, always in the same
direction, to be imparted to the head and spindle, whereby an upward current is
generated in the interior of the flue or ventilating shaft, and at the same time the
interior of the chamber at the upper end of the cap, terminal, or ventilator is kept 2
clean by the action of the internal vanes or blades thereon.
A door may be provided in the cap, terminal, or ventilator for the purpose of
facilitating the cleansing thereof.
And in order that my said Invention may be more clearly understood and readily
carried into effect I will proceed, aided by the accompanying Drawings, more fully 3
to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is an elevation, Figure 2 is a vertical section, Figure 3 is a plan or tcp
view, and Figure 4 is a sectional plan on the line 1, 1, of Figure 1, representing a
chimney cap, terminal, or ventilator constructed according to my Invention.
a is a chamber at the top and bottom of which I fix cross bearings or supports.
b, c, to receive and guide a spindle d, the lower end of which is supported by a
glass bearing c¹ to prevent friction, and thereby dispense with the use of oil or
3

page_text: other lubricant. To this spindle d are fixed straight blades or vanes e which are
parallel to or slightly inclined to the spindle d and which are curved on their faces,
and at their outer edges nearly touch the interior of the chamber a.
The upper end of the spindle & has fixed thereon a rotating head provided with
openings therein, and with a number of concave vanes f projecting therefrom,
which by the action of the wind thereon cause a rotary motion, always in the samic
direction, to be imparted to the head fand, consequently, to the spindle d, whereby
an upward current is generated in the interior of the flue or ventilating shaft, and
at the same time the interior of the chamber a is kept clean by the action of the
internal vanes or blades e thereon.
A door a¹ is preferably provided in the cap, terminal, or ventilator for the
purpose of facilitating the cleansing thereof, and the lower end a³ of the cap, ter-
minal, or ventilator is suitably shaped and reduced to fit any sized flue or ventilating
shaft.
By the aid of my Invention I am enabled to produce a cheap, simple, durable,
and efficient chimney cap, terminal, or ventilator.
Having thus described the nature of my said Invention and the mode in which
I carry the same into effect, I would have it understood that what I claim is, the
novel construction of chimney cap, terininal, or ventilator, substantially as herein
shown and described.
In witness whereof, I, the said John Edward Carter, have hereunto set my
hand and seal, this Twenty-third day of December, in the year of our Lord
One thousand eight hundred and seventy-eight.