Improvements relating to Apparatus for Indicating the Names of Stations in Railway Carriages.
Year: 1890

page_text: Date of Application, 24th Nov., 1890
Complete Specification Left, 17th Aug., 1891-Accepted, 24th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements relating to Apparatus for Indicating the Names of
Stations in Railway Carriages.
1, WILHELM SCHLOSSER, of No. 7, Welbritzstrasse, Wiesbaden, in the Empire
of Germany, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus for indicating to the passengers in railway
carriages the name of the station which the train is approaching and it consists
mainly in connecting the apparatus to the compressed air-pipe of the brakes in such
a manner that the indicator will only act when the air in the pipe is compressed to
a higher degree than is necessary to operate the brakes.
According to my invention provide a valve chest or chamber connected by
Valves are arranged
means of a tube to the compressed air-pipe of the brakes.
to open towards the chamber and to close when the pressure in the said chamber
rises above a certain degree, and a weighted valve allows the air to pass from the
chamber into a second or upper chamber only when the pressure in the former
chamber is higher than is necessary to operate the brakes. The upper chamber is
connected to the underside of a cylinder by means of a pipe, the said cylinder being
provided with a piston having a hollow piston-rod, which rod is guided by means
of a guide-plate screwed to the cylinder and provided with perforations. The
guide-plate and piston-rod are of such a form as to prevent the piston from
turning.
The piston-rod is closed at its upper end by a valve opening upwards and at the
lower end by a valve which opens downwards. The guide-plate is provided with
pins on which the upper piston-rod valve rests when the piston is in a certain
position.
The cylinder is closed by means of a cover forming a kind of cock in which is
placed a plug it has also an outlet closed by a small cock which serves for lubri-
cating the apparatus and, in a certain position, opens communication with the air.
The cock of the cover has an axial passage and radial passages and terminates in
a shaft at the top, while at the lower end it is rigidly connected to a cylinder, the
inner surface of which is provided with zigzag grooves in which work pins fixed to
the piston-rod. By this arrangement the cylinder together with the plug of the
cover cock and the shaft are at each stroke caused to turn one eighth of a revolution.
The cylinder is provided with two vertical passages one of which communicates
with the valve chamber while the other communicates with the upper chamber. Both
these passages extend through the sides of the cylinder and into other passages.
The shaft is provided at the upper end with a bevel-wheel engaging with a similar
wheel on a roller so that at each quarter of a revolution it partially turns the
roller and thereby causes an endless band stretched over the roller and having
the names of the stations marked thereon to exhibit through a suitable opening the
names of the stations as the train approaches them.
Instead of an endless band a disc could be used with the names of the stations
marked radially thereon, the disc being rotated to the required degree at each
operation of the apparatus.
1000

page_text: COMPLETE SPECIFICATION.
A
Improvements, relating to Apparatus for Indicating the Names o
Stations in Railway Carriages.:
I, WILHELM SCHLÖSSER, of No. 7, Welbritzstrasse, Wiesbaden, in the Empire
of Germany, Engineer, do hereby declare the nature of this invention and in wha
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:-
This invention relates to apparatus for indicating to the passengers in railway
carriages the name of the station which the train is approaching and it consists
mainly in connecting the apparatus to the compressed air pipe of the brakes in such
⚫ a manner that the indicator will only act when the air in the pipe is compressed to
a higher degree than is necessary to operate the brakes.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawing which represents views
of the various parts of an apparatus constructed according to my invention for
indicating the names of stations in railway carriages.
Each indicating apparatus, or the whole, or a number only of them is fitted with
a valve chestas represented in vertical and half horizontal sections at Figures 8 and 9
respectively. The chamber 10 is connected by means of a tube 9 to the compressed
air pipe of the brakes. The valves ', el are arranged to open towards the chamber 10
and to close when the pressure in the chamber 10 riscs above a certain degree.
The valve V is made so heavy or weighted that it will allow the air to pass from
the chamber 10 into the chamber 12 ouly when the pressure in the former chamber
is higher than is necessary to operate the brakes. The upper chamber 12 is con-
nected to the underside of a cylinder C by means of the pipe 11 as shown in Figure 1
which is a vertical section of this portion of the apparatus. The cylinder Cis
provided with a piston K the hollow piston rod of which is guided by means of a
guide plate which is screwed to the cylinder and provided with perfora-
tions 15, 15. The guide plate and piston rod are of such a form as to prevent the
piston from turning.
A suitable sectional shape of the piston rod is shown in Figure 4 which is a
horizontal section taken through the piston rod and a cylinder C' and guiding pins
hereinafter described.
The piston rod is closed at its upper end by a valve opening upwards and
at the lower end by a valve which opens downwards. The guide plate is pro-
vided with pins s, on which the valve ³ rests when the piston is in a certain
position.
The cylinder is closed by means of a cover D' of the form shewn in Figure 1 and
somewhat resembling the body of a cock in which is placed a plug H; it has also
an outlet 16 closed by a small cock which serves for lubricating the apparatus and,
in a certain position, opens communication with the air; it is however so small that
it does not affect the working of the apparatus.
The cock H has an axial passage 19 and radial passages 17 and 18 (as shown in
Figures 2 and 3 which are respectively sections on the lines A B and CD of
Figure 1) and terminates in a shaft W at the top, while at the lower end it is
rigidly connected to the cylinder C, the inner surface of which is provided with
zigzag grooves (shewn in enlarged elevation at Figure 5) in which work the pins,
fixed to the piston rod k. By this arrangement the cylinder together with the
plug H and the shaft W are at each stroke caused to turn one eighth of a revolu-
tion. The cylinder is provided with two vertical passages 13 and 31 (shown in
Figures 1, 2 and 3 and also in Figure 6 which is a section on line e, of Figure 1),
the first of which communicates with the chamber 10 while the latter communicates
with the chamber 12. Both these passages extend through the sides of the cylinder'
Figure 6 into the cover D'; the passage 13 extends to the level of the way 17,
Figure 2, and the passage 31 extends to the level of the way 18, Figure 3 the

page_text: shaft W, as shewn in Figure 7 which is an elevation of the indicating portion of the
apparatus, is provided at the upper end with a bevel wheel E engaging with a
similar wheel F on a roller G so that at each quarter of a revolution it partially
turns the roller and thereby causes an endless band stretched over the roller and
having the names of the stations marked thereon to exhibit through a suitable
opening the said names of the stations as the train approaches them.
Instead of an endless band a disc could be used with the names of the stations
marked radially thereon the disc being rotated to the required degree at each
operation of the apparatus.
The required quarter revolution of the shaft W is effected from the locomotive
in the following manner: Suppose the parts of the apparatus to be in the position
shewn in Figure 1, in which position the branch 9 of the air pipe of the brakes is in
communication with the atmosphere and the cock in the position shewn in Figure 2
which is also that which it occupies when only sufficient air is introduced to operate
the brakes.
The air pipe of the brakes is now filled with air compressed to a higher degree
than is necessary for operating the brakes whereby the valves ', ' are caused to
close and the valve V is at the same time opened. The air then passes into the
chamber 12 and through the pipe 11 to the underside of the piston K. The air
closes the valve 2 moves the piston with the piston rod k and valve ³ upwards and
thereby turns the cock one eighth of a revolution, the passage 13 being thus
brought into communication with the ways 17. The air in the chamber 10 being at
a higher pressure than that in the chamber 12 passes through the passages 13, 17
and 19 closes the valve and passes through the perforations 15 on to the top of
the piston K which it presses down and thereby causes the shaft to turn another
eighth of a revolution by the pins entering the following zigzag grooves.
downstroke of the piston the valve comes upon the pins s and the passage 31 is
brought into communication with the ways 18, the pressure on both sides of the
piston being thereby equalized. The air from both sides of the piston escapes slowly
through the cock 16 and the air from the valve V will enter till it is reduced to
ordinary pressure in the main pipe. The shaft W has now made a quarter of a
revolution and the apparatus is again ready for use.
At the
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.) An apparatus for indicating the names of stations in railway carriages which
is connected to the air pipe of the brakes and is worked from the locomotive by
causing air compressed to a higher degree than is necessary for operating the brakes
to pass into the said air pipe, substantially as herein before described.
(2.) In apparatus of the kind referred to in Claim 1
(a) The valve V which is weighted to such an extent that it only admits air at
a higher pressure than is necessary to operate the brakes.
(b) The cylinder C and piston K with the hollow piston rod k and valves *
and and the guide for the piston rod inside the cylinder in combination
with pins, on the piston rod which enter zigzag grooves on the inside of
a cylinder c' so as to turn the cock always in one direction at the up as well
as at the downstroke of the piston.
(e) The cock H which, by means of its passages 17, 18, 19, when turned, allows
highly compressed air to pass through the passage 13 onto the upper side of
the piston and which by a further turn cuts. off the air supply when, by
means of the passages 31, 18, 16, the air from both sides of the piston is
allowed to escape.
ו.
1 .
P
1001