Improvements in Apparatus for Heating Railway Carriages.
Year: 1897

page_text: Date of Application, 29th Mar,, 1897
Complete Specification Left, 28th Dec., 1897-Accepted, 5th Feb.,
1898.
Improvements in Apparatus for Heating Railway Carriages.
I, JOHN ELIOT HOWARD, of 63, Queen Victoria Street, in the City of London, do
hereby declare the nature of this invention to be as follows:-
The pipes for heating railway carriages are usually enclosed in a casing the
temperature of the carriage being regulated by opening more or less a slide or door in
the casing.
With such arrangements the entrance of cold air into the casing is impeded by the
outgoing hot air the result being that an unnecessarily large amount of heating
surface has to be employed and it is also practically impossible to heat the layer of
air just above the floor.
According to this invention I obviate these objections by employing two openings
one at the top of the casing and the other close to the bottom, the size of these openings
being simultaneously adjusted.
For this purpose the openings are provided with hinged doors operated by a slide
carrying two wedges at right angles to each other. One wedge supports the top door
and the other comes against the back of the lower door which is hung from its top
and opens inwards.
Improvements in Apparatus for Heating Railway Carriages
I, JOHN ELIOT HOWARD, of 63, Queen Victoria Street, in the City of London,
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 :-
The pipes for heating railway carriages are usually enclosed in a casing the
temperature of the carriage being regulated by opening more or less a slide or door
in the casing.
With such arrangements the entrance of cold air into the casing is impeded by
the outgoing hot air the result being that an unnecessarily large amount of beating
surface has to be employed and it is also practically impossible to heat the layer of
air just above the floor.
According to this invention I obviate these objections by employing two openings
one at the top of the casing and the other close to the bottom, the size of these
openings being simultaneously adjusted.
Figure 1 is a side elevation of the apparatus I prefer to employ. Figure 2 is a

page_text: transverse section on the line 2-2 Figure 1, and Figure 3 is a perspective view of
the interior.
a is the casing containing the hot pipes, b is an upper door hinged at 61 and
cc lower doors hinged at c¹ and connected by a bar d. e is a handle fixed to the
spindle f, g and h are inclines or cams fixed to the spindle f. The acting surfaces of
the cams g and h are inclines or wedges at right angles to each other, the cam g
being in the form of a spiral quadrant acting on the underside of the door b and the
cam h a snail cam acting on the back of the bar d.
jis a spring bolt on the handle e which drops into notches
quadrant l.
in the
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. The combination of the casing, openings near the top and bottom. and means
for simultaneously adjusting the size of the openings.
2. The combination of the casing, doors near the top and bottom and wedges at
right angles to each other acting on the doors.
3. Apparatus for heating railway carriages substantially as described and shown in
the drawings.