Improvements in or connected with Barriers for the Entrances of Railway and Tramway Vehicles.
Year: 1898

page_text: Date of Application, 13th Apr., 1898
Complete Specification Left, 27th Jan., 1899-Accepted, 4th Mar.,
1899
Improvements in or connected with Barriers for the Entrances of
Railway and Tramway Vehicles.
I, CURT LINDNER, Student in Forest Matters, residing at Tharandt, Silverstreet 15,
in the Kingdom of Saxony, do hereby declare the nature of this invention to be as
follows:-
The object of the present invention is a barrier or gate for the entrances of electric
tramway vehicles. It may also be used for ordinary railway carriages but with
certain modifications.
The purpose of the barrier is to hinder people from jumping up or off when the
vehicle is in motion.
The barrier is operated by means of electricity in connection with or without a
centrifugal apparatus. When without, the electric circuit may be controlled by
the conductor of the carriage.
However, it is better to make the closing or opening of the electric circuit not
dependent upon the will of the conductor of the carriage, but entirely upon the
stopping or starting of the vehicle.
The barrier may have the ordinary form, and swing around a pivot, or it may
be lattice-like, as shown in Fig. 4 of the accompanying drawings.
The electric current can only open the gate, and does so when the vehicle stops.
In this moment, the centrifugal apparatus containing the means of closing the
electric current, ceases to revolve, and its balis and arms fall by their own weight
and connect the terminals of the electric conductors with each other. The electric
circuit is now closed and the current flows through a solenoid which pulls back the
barrier.
In the accompanying drawings
Fig. 1 shows the swinging barrier of a vehicle and the solenoid;
Fig. 2 shows how the motive power is given to the centrifugal apparatus from
the axle of the vehicle.
It also shows the centrifugal apparatus and the terminals of the electric
conductors or the contacts.
Fig. 3 shows the cross section of the apparatus on the line x-x of Fig. 2.
Fig. 4 shows a lattice-like barrier.
Figure 1 (a) is the vehicle, and (b) the box taking up the opened barrier or
gate (c).
The barrier turns on a bolt (d) and is provided at the one end with the
curved piece (c') which acts as armature of the solenoid (e).
The solenoid (e) is connected with the conductor wires, in which is inserted
also the centrifugal apparatus.
The circuit is opened as soon as the vehicle starts. The barrier is then closed,
and to prevent the closed barrier from being opened by any one, a moveable
bolt (f) is so arranged that, by the pressure of a spring, it is forced at (c²)
under the inner end of the barrier or gate.
To the axle (y) of the vehicle (see Fig. 2) is fitted a bevelled wheel (i) the teeth
D

page_text: of which gear into the teeth of the bevelled wheel () attached to the shaft (1)
of the centrifugal apparatus.
. The centriful apparatus is held in position by the arms (o), and the balls (p)
swing around the shaft (1) when the latter is turned by the toothed wheel (i).
On the lower arm (o) is attached the piece (m¹) which supports the ring (m),
in which the conducting wire-ends (n) are fastened and insulated from each
other.
Another ring (7) is connected to the lower ends of the arms (3) of the
centrifugal apparatus and changes its vertical position on the shaft (), according
to the rapidity of the revolutions of the apparatus.
The ring (r) touches the ring (m), when the axle (y) of the vehicle ceases to
revolve, that is to say, when the vehicle stops, at which moment the electric
circuit becomes closed.
As soon as the vehicle is put in motion, the axle (1) of the centrifugal apparatus
begins to revolve, and with it the balls (p) and ring (7); the ring (2) rises from
the ring (m) and thus the electric circuit becomes opened; the barrier then sinks
by its own weight, pivoting around bolt (d) a quarter of a circle, and bars the
entrance to the vehicle; a spiral spring (d) prevents the too rapid falling of the
barrier.
As soon as the barrier has reached its horizontal position, the moveable bolt (f)
is pushed beyond the part (c2) by the pressure of a spring, which prevents the
barrier from being opened at will.
As soon as the carriage stops, the ring (r) sinks upon ring (m), the circuit is
closed, and the solenoid (g) placed in said circuit and adapted to attract the bolt (f),
draws back the bolt and releases so the barrier (c). The electric current flows
also through the solenoid (e) which attracts the armature (c¹) and the barrier
rises.
Fig. 4 represents a lattice-like barrier, the arms (8) of which have the pivot
at (t), and are spread by the pressure of the spring (w) surrounding the semi-circular
piece (v).
When the vehicle stops and the circuit is closed, the electric current flows through
solenoids (not represented) which attract the ends (u) and cause the barrier to fold
its arms, so that the entrance becomes opened.
។
T
"1 1000
Improvements in or connected with Barriers for the Entrances of
Railway and Tramway Vehicles.
I, CURT LINDNER, Student in Forest Matters, residing at Tharandt, Silver-
street 15, in the Kingdom of Saxony, 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 object of the present invention is a barrier or gate for the entrances of electric
tramway vehicles. It may also be used for ordinary railway carriages but with
certain modifications.
The purpose of the barrier is to hinder people from jumping up or off
when the vehicle is in motion.

page_text: The barrier is operated by means of electricity in connection with or without a
centrifugal apparatus; when without the electric circuit may be controlled by the
conductor of the carriage.
However, it is better to make the closing or opening of the electric circuit not
dependent upon the will of the conductor of the carriage but entirely upon the
stopping or starting of the vehicle.
The barrier may have the ordinary form and swing around a pivot, or it may be
lattice-like, as shown in Fig. 4 of the drawings.
The electric current can only open the gate, and does so when the vehicle stops.
In this moment the centrifugal apparatus containing the means of closing the electric
current, ceases to revolve and its balls and arms fall by their own weight and
connect the terminals of the electric conductors with each other. The electric circuit
is now closed and the current flows through a solenoid which pulls back the barrier.
In the drawings left with the Provisional Specification
Fig. 1 shows the swinging barrier of a vehicle and the solenoid;
Fig. 2 shows how the motive power is given to the centrifugal apparatus from the
axle of the vehicle.
It also shows the centrifugal apparatus and the terminals of the electric
conductors or the contacts.
Fig. 3 shows the cross section of the apparatus on the line-ɛ of Fig. 2;
Fig. 4 shows a lattice-like barrier.
In Fig. 1 (a) is the vehicle, and (b) the box taking up the opened barrier or
gate (c).
The barrier turns on a bolt (d) and is provided at the one end with the curved
piece (c) which acts as armature of the solenoid (e).
The solenoid (e) is connected with the conductor wires, in which is inserted also
the centrifugal apparatus.
The circuit is opened as soon as the vehicle starts. The barrier is then closed,
and to prevent the closed barrier from being opened by anyone, a moveable bolt (f)
is so arranged that, by the pressure of a spring, it is forced at (c) under the inner
end of the barrier or gate.
To the axle (y) of the vehicle (see Fig. 2) is fitted a bevelled wheel (i) the teeth
of which gear into the teeth of the bevelled wheel (A) attached to the shaft (l) of
the centrifugal apparatus.
The centrifugal apparatus is held in position by the arms (o), and the balls (p)
swing around the shaft (1) when the latter is turned by the toothed wheel (i). On
the lower arm (o) is attached the piece (m³) which supports the ring (m), in which
the conducting wire-ends (n) are fastened and insulated from each other.
Another ring (r) is connected to the lower ends of the arms () of the centrifugal
apparatus and changes its vertical position on the shaft (1), according to the rapidity
of the revolutions of the apparatus.
The ring (2) touches the ring (m), when the axle (y) of the vehicle ceases to
revolve, that is to say when the vehicle stops, at which movement the electric circuit
becomes closed.
As soon as the vehicle is put in motion, the axle (/) of the centrifugal apparatus
begins to revolve, and with it the balls (p) and ring (r); the ring (7) rises from the
ring (m) and thus the electric circuit becomes opened; the barrier then sinks by
its own weight, pivoting around bolt (d) a quarter of a circle, and bars the entrance
to the vehicle; a spiral spring (d') prevents the too rapid falling of the barrrior. As
soon as the barrier has reached its horizontal position, the moveable bolt (f). is
pushed beyond the part (c²) by the pressure of a spring, which prevents the barrier:
from being opened at will.
As soon as the carriage stops, the ring (?) sinks upon ring (m) the circuit is
closed, and the solenoid (g) placed in said circuit and adapted to attract the bolt (ƒ).
draws back the bolt and so releases the barrier (c). The electric current flows also
through the solenoid (e) which attracts the armature (c) and the barrier rises.
Fig. 4. represents a lattice-like barrier, the arms (s) of which have their pivot
:

page_text: at (t) and are spread by the pressure of the spring (w) surrounding the semi-
circular piece (v).
When the vehicle stops and the circuit is closed, the electric current
flows through solenoids (not represented) which attract the ends (u) and cause the
barrier to fold its arms so that the entrance becomes opened.
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 combination of a carriage with a barrier which is arranged at the entrance
of the carriage and means to actuate the barrier in order to close the entrance at
the motion of the carriage and to open it at the stopping of the carriage, sub-
stantially as and for the purpose described.
2. The combination of a carriage with a barrier, which is arranged at the
entrance of the carriage, means in order to close and to open the barrier, an electric
circuit, in which the meaus to open and close the barrier are included and means
for opening the electric circuit by the motion of the carriage, and means for
closing the electric circuit by the stopping of the carriage, substantially as and for
the purpose described.
8. A barrier which is able to close the entrance of a carriage, is included in or
connected to an electric circuit and can be opened by the closure of this electric
circuit, substantially as and for the purpose described.
4. A pivoting barrier, which is adapted to close the entrance of a carriage, the
pivot of which is at the one end of it, with an electromagnet (bobbin) the anchor
of which is connected to the same before mentioned end, and an electric circuit, in
which the electromagnet is included and means in order to open (interrupt) the
electric circuit at the motion of the carriage and to close the circuit at the stopping
of the carriage, substantially as and for the purpose described.
5. The combination of a carriage with a pivoting barrier, which is adapted to
close the entrance of the carriage, the pivot of which being at the one end of the
barrier, the anchor of which being fastened at this end, an electric circuit in which the
said electromagnetic anchor is included and a centrifugal apparatus, which closes
the circuit in consequence of the stopping of the carriage, whilst it interrupts the
circuit in consequence of the moving of the carriage.
6. The combination of a carriage with a pivoting barrier which is adapted to
close the entrance of the carriage the pivot of which barrier being at the one end
of it, an electromagnet the anchor of which is fastened at the said end, an electric
circuit, in which circuit the electromagnet is included, a centrifugal apparatus
which is included in the said circuit and is moved up and down by the carriage, and
contacts, which are included in the said electric circuit and are fastened under the
centrifugal apparatus with precautions of isolation, substantially as and for the
purpose described.
7. The combination of a carriage with a pivoting barrier, which is adapted to
close the entrance of a carriage, and the pivot of which being at the one end of it,
an electromagnet the anchor of which being fastened at the said end of the barrier,
an electric circuit in which are included the said electromagnet, a vertical axle
which is included in the said circuit and is put in rotation by the movements of the
carriage, and is provided with weights or balls which can swing round it, a ring
piece which can play up and down on this axle which ring piece is connected by
links to the said weights or balls, and contacts, which are included in the said circuit
and fastened and isolated beneath the ring piece of the said axle, substantially as
and for the purpose described.
8. The combination of a carriage with a pivoting barrier which is adapted to close
the entrance of the carriage, the pivot of which being at the one end of it, an
electromagnet the anchor of which is fastened at the same said end of the barrier,
an electric circuit in which is included the said electromaguet, a vertical axle,
which is included in the said circuit and put in rotation by the movements of the

page_text: carriage and provided with weights or balls which can swing round the axle, a ring
piece which can play up and down on this axle and is connected to the said weights
or balls by links, contacts which are included in the electric circuit and are fastened
and isolated beneath the said ring piece and a bar ring bolt which prevents the
taking away of the barrier i.e. the opening of the entrance, the electric circuit being
interrupted, whilst this bolt is pulled back by the current, when the circuit is
closed.
9. A barrier consisting in a so called Nuremberg scissor, which is adapted to
close the entrance of a carriage, an electromagnet, the anchors of which are arranged
at the ends of the supporting arms of the scissor, an electric circuit in which are
included the said electromagnets and means to interrupt the said electric circuit at
the moving of the carriage and to close the circuit at the stopping of the carriage,
substantially as and for the purpose described.
10. A barrier, consisting in a so called Nuremberg scissor (or clip) which is
arranged at the entrance of a carriage, electromagnets the anchors of which are
fastened at the outer ends of the supporting arms of the scissor, as electric circuit,
in which the said electromagnets are included, means to interrupt the said circuit at
the moving of the carriage and to close it at its stopping, and springs, by which
the scissor is to be caused to spread its arms, substantially as and for the purpose
described.