IMPROVEMENTS IN THE CONSTRUCTION OF WIND GUARDS AND OTHER VENTILATORS
Year: 1872

page_text: LETTERS PATENT to William Henry Dupré, of Jersey, for the
Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF WIND GUARDS AND
OTHER VENTILATORS.”
Sealed the 19th November 1872, and dated the 21st May 1872.
COMPLETE SPECIFICATION filed by the said William Henry Dupré at
the Office of the Commissioners of Patents, with his Petition and
Declaration on the 21st May 1872, pursuant to the 9th Section of
the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HENRY DUPRÉ, of Jersey, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF WIND GUARDS AND OTHER VENTILATORS," and have
petitioned Her Majesty to grant unto me, my executors, administrators,
and assigns, Her Royal Letters Patent for the same, and have made
solemn Declaration that I am the true and first Inventor thereof.

page_text: NOW KNOW YE, that I, the said William Henry Dupré, do hereby
declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the said Invention, and
in what manner the same is to be performed, in and by the following
statement and the Drawings therein referred to, that is to say :—
My Invention has reference, firstly, to an improved construction of
wind guards for ventilating buildings, as also for accelerating the escape
of smoke from chimneys by employing internal conducting chambers in
connection with external curvilinear blades or ribs. for deflecting the
wind downwards through the said spiral blades against the inner
surfaces, from which it receives an increased impulse, and is conducted
or forced upwards and discharged at the top outlet of the ventilator, as
indicated by the arrows.
My Invention relates, secondly, to an improved form of spindle to be
used in connection with lobster back, sugar loaf, or other shaped
cowls or ventilators for preventing the accumulation of soot within the
said cowl head, or any obstruction to the sweeper's brush, at the same
time enables the cowl to revolve with a perfectly noiseless motion
through the medium of a lubricating cup or tube for maintaining a
supply of oil to the revolving spindle.
My Invention relates, thirdly and lastly, to a method of securing the
slide or glass within the valve frame of roof light ventilators by means
of a rabbet and hinged plate overlaying the lower end of the glass
so as to retain the same in the frame by means of fixing pins or
studs.
And in order that my said Invention may be more fully understood
and readily carried into effect, I now proceed to describe the same by aid
of the accompanying Drawings, reference being had to the letters and
Figures thereon marked (that is to say) :-
Fig. 1 represents an outside elevation of a wind guard or cowl upon
my improved principle of construction; Fig. 2, a vertical section thereof;
Figure 3, top or plan view of same; Fig. 4, a transverse vertical section
taken through the dotted line 1 and 2.
Fig. 5 shows a side elevation of a lobster back cowl, and mode of
forming and employing my improved spindle; Fig. 6, sectional elevation

page_text: WRC1
samu spin,
1, top or pian view OL
same.
Figs. 8, 9 and 10, corresponding views of sugar loaf cowl or ventilator
with improved spindle applied thereto, and Figs. 11, 12, and 13, front,
side, and detail views of a roof light ventilator, showing valve frame
partly open.
In each Figure the same letters of reference denote similar corre-
sponding parts.
A, A, case or stem of wind guard; B, B, body barrel; C, C, inner
chambers for directing the wind deflected by the spiral or curvilinear
blades to within seven inches below the top of the same; D, D, spiral
blades secured to the body barrel; E, E, tapered rims to which the
spiral blades aforesaid are fixed; F, F, conical cap for diffusing the
smoke; G, G, openings in the inner chamber for directing the passage
of air or smoke to the top of the ventilator; H, H, lobster back cowl;
I, I, curved spindle or bearing upon which the cowl revolves; J, J,
lubricating cup or tube containing a supply of oil for surrounding the
inner revolving spindle K, K, in manner shown; L, L, framing of roof
light ventilator; M, M, ventilating valve; N, N, rabbet or groove in
which the glass or slide M' is inserted and secured; O, O, shifting hinge
plate for securing the lower end of the glass within the groove; P, P,
fixing stud or pin for securing the hinge closed.
Figs. 14, 15, 16, and 17 shows an ordinary wind guard fitted with
taper rims and covering top.
Having now fully described and ascertained the nature of this my
said Invention, and the manner in which the same is to be performed
and carried into effect, I would have it clearly understood that I do
not intend to confine myself to the precise details herein-before set
forth and described, as the same may be otherwise varied without
departing from the general principle of this my said Invention, nor do
I claim as new and of my said Invention the exclusive use of the several
parts, combinations, and processes, except when the same are employed
in and for the purposes of my said Invention, which I hereby declare to
consist,―
Firstly. In the construction of wind guards with outer spiral blades
1

page_text: directing the wind upwards within the body barrel in connection with
one or more tapered rims, before described, and covering top.
Secondly. In the mode of forming and employing curved spindles
with lubricating cup or tube for supporting wind guards or cowls, and
enabling the same to revolve without noise.
Thirdly, and lastly. In the mode of securing glass and other slides
within the rabbet of valve ventilators, through the medium of a hinged
plate secured by pins, substantially in the manner and for the purpose
herein-before set forth and described.
In witness whereof, I, the said William Henry Dupré, have here-
unto set my hand and seal, this Seventeenth day of May, in
the year of our Lord One thousand eight hundred and seventy-
two.
Witness,
B. F. WEATHERDON,
77, Chancey Lane.
W³. H. DUPRÉ. (L.S.)