Improvements relating to the Ventilation of Railway Carriages and to Apparatus therefor.
Year: 1889

page_text: Date of Application, 29th May, 1889
Complete Specification Left, 28th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements relating to the Ventilation of Railway Carriages and
to Apparatus therefor.
I, WILLIAM WHAYMAN HAMMOND, of Fern Cottage, Keogh Road, Stratford, in the
county of Essex, Chief of Carriage Department, Great Eastern Railway, do hereby
declare the nature of this invention to be as follows:-
My invention relates to the ventilation of railway carriages, and to apparatus
therefor.
In carrying out my invention I provide two concentric rings or tubes, the outer of
which is provided with a flange or flanges or with other suitable means for securing it
to the roof of the railway carriage.
The inner tube which extends somewhat above the outer tube is supported from the
said outer tube by radial web pieces, pins or the like, sufficient space being left
between the two tubes to allow the passage of air. The inner tube forms a lamp
socket or holder and may be provided with an internal flange for supporting the lamp
or lamp globe.
Upon the outer side of the upward extension of the inner tube is formed a flange
of sufficient width to cover the air passage between the tubes, but sufficiently far from
the upper edge of the outer tube to offer no obstruction to the passage of air. Or
the said flange may rest upon the upper edge of the outer tube, in which case the
said upper edge has a series of notches or recesses formed therein to allow the passage
of air.
A cap or lid is secured to the covering flange for closing the inner tube or lamp
socket against the weather, the said cap or lid being advantageously provided with a
self-locking catch.
The lower end of the air passage inside the carriage may be provided with a kind
of grating which in some cases can be adapted to close.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Ventilation of Railway Carriages and
to Apparatus therefor.
I, WILLIAM WHAYMAN HAMMOND, of Fern Cottage, Keogh Road, Stratford, in the
county of Essex, Chief of Carriage Department, Great Eastern Railway, 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 :-
My invention relates to the ventilation of railway carriages, and to apparatus
therefor.
-
In carrying out my invention I provide two concentric rings or tubes, the outer of
which is provided with a flange or flanges or with other suitable means for securing
it to the roof of the railway carriage.
The inner tube which extends somewhat above the outer tube is supported from
the said outer tube, sufficient space being left between the two tubes to allow the
passage of air. The inner tube forms a lamp socket or holder and may be provided
with an internal flange for supporting the lamp or lamp globe.
Upon the outer side of the upward extension of the inner tube is formed a flange
of sufficient width to cover the air passage between the tubes. This said flange rests

page_text: upon the upper edge of the outer tube, the said upper edge having a series of notches
or recesses formed therein to allow the passage of air.
A cap or lid is secured to the covering flange for closing the inner tube or lamp
socket against the weather, the said cap or lid being advantageously provided with a
self-locking catch.
The lower end of the air passage inside the carriage may be provided with a kind of
grating which in some cases can be adapted to close.
To enable my invention to be fully understood, I will describe the same with
reference to the accompanying drawings, in which
Figure 1 is a sectional view of ventilating apparatus constructed according to my
invention; and,
Figure 2 is a part plan view and part underside view of the same.
Figures 3 and 4 are views of a detail.
Figures 5 and 6 are sectional views of slightly modified forms of apparatus.
Similar letters of reference indicate corresponding parts in all the figures.
a is the outer tube having the flange 6 by means of which it is attached to the
carriage roof, represented at c; and d is the inner concentric tube, which is of such
size that a passage e is left between it and the outer tube, and is provided with the
flange, which, as shown, serves not only to cover the air passage e, but also to
support the inner tube upon the outer. g, g are the recesses or indentations formed
in the upper edge of the outer tube to allow the escape of the air passing up through
the passage e, as indicated by the arrows figure 1.
h is the cap or lid for closing the inner tube, which cap or lid is hinged to the
flange f, and i is the self-locking catch which I advantageously employ.
It is obvious that when the lid his thrown back, a lamp can be inserted in the tube
or socket d.
k is a ring which forms a finish inside the carriage. The inner edge of the ring
which projects over the passage e has notches formed therein, so that it constitutes
a kind of grating.
In the apparatus shown in figure the lamp is supported on the upper edge of the
tube d. In the modifications shown in figure 5, which is specially designed to be
used with gas-lamps, a flange m is provided to support the globe which must be
inserted from the top. In the modification shown in figure 6, which is also designed
for gas lamps, the globe is designed to be inserted from the bottom of the tube, a
ring n, fitted within the ring k, being in this case provided to support the said
globe.
Instead of supporting the inner tube upon the outer tube as hereinbefore described
by means of the flange f, it may be supported therefrom by means of webs, in which
case the said flange f may be at some distance above the tube a, thereby rendering
the use of the recesses or indentations g, g unnecessary.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The ventilation of railway carriages by means of an annular passage formed on
or around the lamp-socket, substantially in the manner described.
2. Ventilating apparatus for use in railway carriages comprising two concentric
tubes, having an air channel between them, and the inner of which serves as a lamp
socket, substantially as described.
3. The manufacture and use of the improved ventilating apparatus hereinbefore
described and illustrated in the accompanying drawings.
Dated the 28th day of February 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.