Improvements in Ventilators, applicable to Railway Carriage and other Windows.
Year: 1891

page_text: Date of Application, 13th June, 1891
Complete Specification Left, 13th Apr. 1892-Accepted, 14th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Ventilators, applicable to Railway Carriage and
other Windows.
We WALTER GRIMES of Silverlands, Netherton Road, St. Margaret's,
Twickenham in the County of Middlesex, Traveller, and WILFRED CAMPBELL
LATHAM of Abbey Ville, Boyle, Ireland, Gentleman, do hereby declare the nature
of this invention to be as follows:-
This invention relates more particularly to the windows of railway carriages,
coaches, omnibuses, trams, and other vehicles, into which it is desirable air for
ventilating purposes, without creating a draught upon the passengers who have to
sit close to, or in line with the windows. The invention, however, is also applicable
to to other windows.
In applying our invention to the windows of, say, railway carriages we arrange
in the upper portion of the frame thereof, a hinged flap or ventilator, which is
capable of opening inward and giving ingress to air in an upward direction.
At the ends of the flap part, there are arranged, in connection with the window
frame, end pieces for stopping draught in that direction. These end pieces may
consist of strips of sheet metal or other material, which open out like a lady's fan
when the ventilator opens, and close up flush with the frame when the ventilator is
closed, or the end pieces may be made to fold up in one or two joints.
Thus, to admit air to the carriage, it is not necessary to let down the window,
which has the effect, especially when the window is open only a few inches, of
allowing a stream of air to pour straight down upon the passengers, or some of
them, but it will be sufficient to open the ventilator above described, the flap of
which forms a deflector for diverting upward the current of incoming air, thus
giving it time to disperse without striking the passengers.
Dated this 13th day of June 1891.
NEWTON & SON,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Ventilators, applicable to Railway Carriage and
other Windows.
We,
WALTER GRIMES of Silverlands, Netherton Road, St. Margaret's,
Twickenham in the County of Middlesex, Traveller, and WILFRED CAMPBELL
LATHAM of Abbeyville, Boyle, Ireland, Gentleman, 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 :-
This invention relates more particularly to the ventilation of railway carriages,
omnibuses, tramcars, and other vehicles of a like character; the object of the
invention being to provide for the admission of fresh air without causing an
unpleasant draught to the passengers.
Our invention is chiefly useful in connection with the sash windows of railway
and other carriage doors, the opening of which almost of necessity subjects the
passengers seated near, to current of incoming air, which is frequently unpleasant,
especially in cold weather.
The application of our invention to such windows does not interfere with the
opening and closing thereof in the usual way, but permits of the admission of air
without discomfort to the passengers, and without the window being let down. It

page_text: will be obvious, however, that our ventilators may be applied to windows in anerent
situations, and of different character.
In the accompanying drawing we have illustrated our invention as applied to the
sash window of a railway carriage.
Fig. 1 shews in front view the upper portion of a railway carriage window, with
our ventilator therein, closed.
Fig. 2 is a sectional side view, on a larger scale, with the ventilator open.
Fig. 3 shews a portion of the back of the ventilator, with the metal overlapping
rim or plate partly removed.
Figs. 4 and 5 are two detail views, in side elevation, to be presently explained.
A is part of a sash window, which is made to slide in the door of a railway
carriage in the ordinary way. B is a ventilator, consisting of a flap b, hinged at
its lower edge in the upper part of the frame of the window A, and capable of
opening inwards to the position shewn in Figure 2. At either end of the hinged
flap b, between it and the window frame, are placed a number or group of narrow
strips c of sheet metal or other suitable material. Each group of strips e spreads
out like a ladies' fan, when the ventilator is opened, and shuts up in like manner
when the ventilator is closed.
с
The strips c are threaded side by side on pins d, which are also the hinge pins
of the ventilator flap b. The strips c in each group or fan, are connected together
by a pin c', which is firmly fixed in the frame of the window A, and passes through
slots c² in the strips c.
These slots are of different lengths, according to the position
of the strip in the group. In Figs. 4 and 5, the two extremes in the dimensions
of these slots are seen. Fig. 4 shews the strip which is to remain in a position
nearly vertical when the ventilator is open, and Fig. 5 shews the strip which has
the greatest extent of movement in the group. In each case, the dotted position
indicates the limit or extent of movement. The slot c² of the strip shewn in
Figure 4, is the shortest, and that seen in Fig. 5 is the longest. The intermediate
strips of the group have slots of different lengths, proportionate to the extent
they are required to move, so as to give the fanlike appearance shewn in Fig. 2.
It is not desirable that the flap of the ventilator should be capable of opening
to an extent much greater than the position shewn in Fig. 2, for in that position
the air entering through the ventilator, perhaps with some little violence, is directed
upwards by the flap and the fans formed by the strips c, so as not to strike
directly upon persons seated close by. The opening of the ventilator may be
limited by stops e. e, or their equivalent, and also by a plate F, which is screwed
to the back of the ventilator flap (see Fig. 3) at either end, and engages with
notches in the strips c. The notches are proportioned in depth and size
according to the position of the said strips, after the manner of the slots c², so that
each strip has an additional support to keep it in position when the ventilator is
open. The ends of the strips are rounded off or shaped to clear the plate E, as
shewn in the drawing, when the ventilator is moved.
A spring catch or other contrivance may be employed to keep the ventilator
closed, when desired.
A sash window fitted with a ventilator as explained, is capable of being drawn
up and down in the ordinary way, as the ventilator, when closed, need not project
beyond the plane of the window, and there is also the advantage, that the window
may be kept closed, and sufficient air obtained through the ventilator, without the
annoyance of draughts.
It is obvious that ventilators made in accordance with our invention may be
fitted in other positions where the advantage of closing up flush, permitted by the
fan-like ends, is a consideration.
Having now particularly described and ascertained the nature of our said inven
tion and in what manner the same is to be performed, we declare that what we
claim is :-
:-
1. A hinged flap ventilator arranged in connection with end portions made of

page_text: strips opening out and closing after the manner of a fan, when the ventilator is
opened and shut, substantially as described and illustrated in the accompanying
drawing.
2. The application to a sash window of a railway carriage or other vehicle, of a
ventilator constructed, arranged, and operating substantially as described and
illustrated in the accompanying drawing.
Dated this 13th day of April 1809
NEWTON & SON,
Agents for the Applicants.