IMPROVED APPARATUS FOR VENTILATING SHIPS, HOUSES, AND. OTHER BUILDINGS
Year: 1877

page_text: LETTERS PATENT to William Henry Dupré, of Jersey, for the Invention of
"IMPROVED APPARATUS FOR VENTILATING SHIPS, HOUSES, AND. OTHER
BUILDINGS."
Sealed the 22nd February 1878, and dated the 23rd August 1877.
COMPLETE SPECIFICATION filed by the said William Henry Dupré at the
Office of the Commissioners of Patents on the 23rd August 1877.
WILLIAM HENRY DUPRÉ, of Jersey. IMPROVED APPARATUS FOR VENTILATING
SHIPS, HOUSES, AND OTHER BUILDINGS."
My Invention has reference to improved apparatus for ventilating ships, houses,
and other buildings with the view to simplify the construction and mechanical
arrangement of the several parts thereof, and enable the same to be manufactured
and employed with greater certainty of action than other systems at present in use,
and consists,
Firstly. In forming ventilating cowls or wind guards with curvilinear outer
passages for supplying air to the cabins or holds of ships, whereby each curvilinear
blade or cavity is arranged to convey the air down a seperate pipe into the vessel,
free and undisturbed by any conflicting currents.
Secondly. Constructing wind guards or cowls for houses or other buildings with
curvilinear blades or concavities, arranged so as to carry the force of the air collected
against the exterior curved blades to the interior of the cowl, and thus produce a
constant upward current or draught for lifting the foul air, smoke, or otherwise,
with it.
Thirdly. Forming chimney cowls with outlet openings at the top or head of the
same by a vertical arrangement of a series of right angle prism-shaped plates, fitted
in connection with funnel-shaped crowns; also constructing, in like manner, curved
bladed wind guards, with a single or double fluted octagon crown top..
*

page_text: Fourthly. Employing, in connection with revolving hoods or cowls upon a curved
spindle, a lubricating cup for holding lard.
Fifthly, and lastly. Constructing roof-light ventilators, with hinged beading or
frame for facilitating the insertion or removal of the glass, and also fixing the same
firmly within the frame by means of nuts and bolts; as also employing a curved
lever or bar for raising, fixing, or shutting the valve attached to the inside edge of
the valve frame in place of outside, as hitherto.
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),—
Figs. 1 and 2 represent a vertical front elevation and transverse section of a ship's
ventilator, in which A, A, represents spiral blades for directing the air downwards
through the funnel-shaped chamber B and pipes B¹ into the hold or other compart-
ment of the vessel in the direction indicated by the arrows.
Figs. 3 and 4, top and plan views of a wind guard c, fitted with a cylindrical head
c¹ and double-fluted octagon crown c² for conveying the wind collected by the
spiral blades A¹ upwards through the crown aforesaid in the direction of the
arrows.
Figs. 5, 6, and 7, front, top, and sectional side view of a wind guard with
deflecting curved blades A, and inward spiral ribs or chambers D for causing an
upward draught through the passage E, E, into the body F of the same, as shewn by
the arrows.
Fig. 8, side view of a wind guard fitted with a double conical head G, G, and
prism-shaped guard plates H, H.
Figs. 9 and 10, side and corresponding section of a lobster-back cowl I, I, fitted
with a curved spindle J, J, upon which the cowl turns within a lubricating cup K,
filled with lard, with pivot bearing K and fixing plate L for preventing the head
from coming off when sweeping the chimney.
Figs. 11 and 12, detached views of the lubricating cup and spindle bearing..
Fig. 13, perspective view of a roof ventilator, partly open.
Fig. 14, enlarged detail front view, shewing a detached portion thereof, and mode
of securing the glass within the frame.
Fig. 15, corresponding view, with overlapping plate open; Fig. 16, edge view of
same; and Fig. 17, front edge view of glass frame, fastened; M, M, foundation or
base plate of ventilator; N, N, ventilating opening; O, projecting rim from base
plate; P, P, glazed valve cover in which the glass Q is fixed and secured by means of
the overlapping hinged plate R, R, and tightening bolts and nuts S and S', so
arranged that on the glass being inserted within the rabbet of the frame the hinged
overlap is closed upon the end so as to keep the glass in firmly, and finally secured
by the nuts and bolts, as shewn at Figs. 13, 14, and 17; T, T, lever bar for opening
or closing the valve; U, U, hinge secured to the inside edge of the valve rim under-
neath the glass, as shewn at Figs. 15 and 16.
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 mode of constructing ventilators and cowls, with deflecting down-
ward blades opening into internal passages. or chambers, and arranged so as to
concentrate the draught in an upward or downward direction through the body of
the cowl with greater freedom than hitherto.
Secondly, and lastly: Securing the glass within roof-light ventilators by means of
screws and nuts and hinged overlapping plate, and mode of hanging the opening

page_text: lever bar, substantially in the manner and for the purposes herein-before set forth
and described.
In witness whereof, I, the said William Henry Dupré, have hereunto set my
hand and seal, this Twentieth day of August, in the year of our Lord One
thousand eight hundred and seventy-seven.
WILILAM HENRY DUPRE. (L.S.)