Improvements in Ventilating Railway Carriages.
Year: 1892

page_text: Date of Application, 15th Mar., 1892
Complete Specification Left, 15th Dec., 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Ventilating Railway Carriages.
We GEORGE EDMUND DONISTHORPE of 12 Oat Lane in the City of London
Merchant and TAYLOR BURROWS of 88 Upper Kennington Lane London in the
County of Surrey Engineer do hereby declare the nature of this invention to be as
follows:-
The existing systems of ventilation by openings in the upper parts of railway
carriage doors is not sufficiently effective to draw or let out the foul air or the
smoke and do not effectively ventilate the interior of the carriage.
To cut the carriage roof for the application of apparatus of various kinds which
have from time to time been brought before railway companies is usually objected to
by the said companies owing to danger of leakage and the covering of carriages
being deteriorated by reason of the rain getting into these openings et cetera.
Also the cost of applying these expensive ventilating apparatus would involve
an immense outlay on the large number of carriages on the railways.
Our present invention is as follows:-
Below the existing external projecting cover or rain guard (opening downwards)
over the existing ventilators in railway carriage doors or sides of such carriages we
affix a covering so as to completely enclose the chamber or space (enclosed by said
rain guard cover) all but a small contracted opening which is formed by two lips
or edges on our enclosing cover which open outwards and downwards.
This enclosure may advantageously be effected by means of two plates of any
suitable material for instance of suitable metal stamped or otherwise formed into the
desired shape.
Each such plate has a flange on one part through which it is firmly screwed up
against the door or side of the carriage close under the said projection and fits closely
all round except at or near the middle where it meets the opposite plate at which
point each plate is turned downwardly and outwardly thus in external appearance
forming (together) a truncated cone.
As the carriage travels along on its journey rapidly through the air a strong
downward current of air from the now enclosed ventilator chamber is thereby
established through the said coned outlet and as the said chamber communicates
through the existing ventilator grating (and regulator) with the interior of the
carriage the air from the interior is thus drawn out unless the ventilator be shut.
Thus by our present invention no cutting or injury to carriage is caused as the
said enclosing plate or plates can be readily and economically fixed to existing
rolling stock and there being no loose parts same cannot get out of order by rough
usage and wear and tear.
Dated this 15th day of March 1800
COMPLETE SPECIFICATION.
Improvements in Ventilating Railway Carriages.
We, GEORGE EDMUND DONISTHORPE of 12 Oat Lane in the City of London,
Merchant, and TAYLOR BURROWS of 88 Upper Kennington Lane, London, in the
5 County of Surrey, Engineer, do hereby declare the nature of this invention and
Price 8d.1

page_text: ascertained in and by the following statement :-
The existing systems of ventilation by openings in the upper parts of railway
carriage doors is not sufficiently effective to draw or let out the foul air or the
smoke and do not effectively ventilate the interior of the carriage.
To cut the carriage roof for the application of apparatus of various kinds which
have from time to time been brought before railway companies is usually objected
to by the said companies owing to danger of leakage and the covering of carriages
being deteriorated by reason of the rain getting into these openings et cetera.
Also the cost of applying these expensive ventilating apparatus would involve an
immense outlay on the large number of carriages on the railways.
Now our present invention is as follows and in order that same may be easily
understood and readily carried into practice we will proceed to describe such
invention with reference to the sheet of drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is an exterior view in elevation of the top part of a railway carriage door
having our invention applied thereto.
Fig. 2 is a transverse section (on an enlarged scale) taken through the ordinary
ventilated hood (having our improvements applied thereto) on line 1-1 Fig. 3.
Fig. 3 is a front elevation of the hood (with our invention applied thereto) the
same as shown in Fig. 1-only on a much enlarged scale.
Fig. 4 is an underside plan of Figs. 2 and 3-that is Fig. 4 is a view looking in
the direction of the arrow x.
Below the existing external projecting cover hood or rain guard A (opening
downwards) over the existing ventilators in railway carriage doors (or sides of
such carriages) we affix a covering so as to completely enclose the chamber or
space (enclosed by said rain guard cover or hood A) all but a small contracted
opening which is formed by two lips or edges C on our enclosing cover which open
outwards and downwards.
This enclosure may advantageously be effected by means of two plates B of any
suitable material for instance of suitable metal stamped or otherwise formed into
the desired shape.
Each such plate has a flange D on one part through which it is firmly screwed
up against the door or side of the carriage E close under the said hood or
projection A and fits closely all round except at or near the middle where it
approaches the opposite plate at which point each plate is turned downwardly and
outwardly at C thus in external appearance forming (together) a truncated cone.
As the carriage travels along on its journey rapidly through the air a strong
downward current of air from the now enclosed ventilator chamber F is thereby
established through the said coned outlet induced by the air rushing past C and as
-the said chamber F communicates through the existing ventilator grating or
openings G (and regulator) with the interior of the carriage the air from the
interior is thus drawn out unless the ventilator be shut.
Thus by our present invention no cutting or injury to the carriages or doors
thereof is caused as the said enclosing plate or plates B C D can be readily and
economically fixed to existing rolling stock and there being no loose parts same
cannot get out of order by rough usage and wear and tear.
In such cases where hoods or rain guards such as A do not already exist we can
readily apply our improvements by first fitting a hood of metal or other suitable
material and then apply our plates to the bottom outlet thereof or we could make
such hood or projection A together with our draught inducing plates all in one
ready to fix in such cases.
In practice it will be found that by applying our improvements to only one side
of each carriage good results will be obtained-although our said improvements
thay be applied both sides if desired.

page_text: 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 :-
The combination and arrangement of plates such as B with lips such as C to
form a cover with coned outlet upon the bottom of the hood or rain guard such
as A over the ventilators in the doors or sides of railway carriages so that as
the carriage travels rapidly along the air rushing past the aforesaid outlet will―
by reason of the shape of said outlet-induce a strong downward current substantially
in the manner and for the purposes hereinbefore set forth.
Dated this 15th day of December 1892
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.