Improved System of Railway Station Signal-locking.
Year: 1898

page_text: Date of Application, 13th Dec., 1898-Accepted, 27th May, 1899
COMPLETE SPECIFICATION.
Improved System of Railway Station Signal-locking.
I, VICTOR ISIDORE FEENY, of 60, Queen Victoria Street, in the Administrative
County of London, Fellow of the Chartered Institute of Patent Agents, do
hereby declare the nature of this invention (a communication to me from
Allgemeine Elektricitäts-Gesellschaft, of Berlin, Germany) and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:
For
The object of a station signal-locking system is to operate i.e. lock or release,
from the station the signals or slides which are worked from the cabin and
which in the arrangement herein described is effected by electrical means.
this purpose two apparatus are necessary, one of which is placed in the office at
the railway station (Fig. 3 of the accompanying drawings), and the other,
Figures 1 and 2, in the signal cabin.
According to the present invention, each of these apparatus contains or com-
bines a transmitter and a receiver, the shaft of the receiver in the one apparatus
being actuated by means of the transmitter lever in the other apparatus
synchronously with such lever, in any of the ordinary ways. In the following
description, the "Drehfeld" distance signal system is taken by way of example.
This system forms the subject matter of British Letters Patent No. 11413
of 1897. The letters N S indicate the usual poles of the coils.
On the annexed drawings illustrating the present invention,
Fig. 1 is a plan view of the receiver, situated in the signalman's cabin.
Fig. 2 being a front elevation (part section) of Fig. 1.
Fig. 3 is a diagrammatical plan of the stationman's transmitter or apparatus.
Figs. 4 to 9 inclusive are diagrams illustrating the working of the apparatus
and shewing various positions assumed by the transmitter lever.
In this system, the transmitter belonging to the station apparatus consists of
a closed resistance coil a to which current is conducted at two points lying dia-
metrically opposite to each other, by means of the rotary transmission lever or
arm Gl
At three points, which are at an angle of about 120° in relation one
to another, three conductors branch off from the coil, in the direction of the
receiver belonging to the signalling mechanism in the cabin. This receiver con-
sists of three coils M¹ M³ M³ which, in the manner illustrated on the drawing,
are so circuited or connected up that a magnetic field is produced therein, which
moves synchronously with the transmitter lever or arm G¹ belonging to the
station apparatus. The nature of this motion is illustrated in Figures 4 to 9.
In connection with this invention, however, any other synchronous system of
transmission can be employed.
The transmitter G2 of the signalling mechanism in the cabin is also electrically
connected in a corresponding manner to the indicator E¹ of the station apparatus.
The conductors or leads necessary for the purpose have been omitted from the
figures of the drawing for the sake of clearness, but they are connected in a
precisely similar manner as are the wires or conductors 1¹ (2ª 13 in connection with
the lever G¹ and the coils M¹ M² M³.

page_text: It is assumed, in the subsequent description, that two distinct signals indicated
for example by A¹ and A2 are to be worked. These are only imaginary signals
and might equally well be designated "down" and "up" signals.
A disc s is connected with the shaft d of the receiver, see Figures 1 and 2,
belonging to the signalling mechanism, which disc, at the radius corresponding
to the position of the lever G of the station apparatus, is provided with a
hole L clearly shewn at Figure 2.
Over the circle which the hole L describes are two keys or pushes T¹ T,
Figure 2. The connection of the rods F and F2 with the signals, which can be
at any desired distance from the signal locking mechanism, can be made with
chains, ropes, or rods. Further, for the sake of clearness and to facilitate
inspection, sight holes f¹ and f corresponding to the signals, can be provided
in the aforesaid casing, whilst another opening f³ would correspond with the
position of rest. In addition to this, the discs with the hole L, is furnished
with a white disc or circle, which, in the position illustrated, is directly. beneath
i.e. before the opening f¹, whilst the remainder of the disc s is painted red so
that the other openings appear, or shew discs of, red.
Further, a locking apparatus connected with the transmission lever G³
which in the present instance is assumed to be a ring R with a notch or groove
located correspondingly to the signals.
་,
Finally, means of transmission from the pushes or locking keys T1 T2 to the
signal rods FF2 will be necessary and for this purpose the two pivotted double-
arm or approximately T-shaped levers HH2 H3 and K K K³ are shewn, by way
of example. They operate the rods S S₁ and thus lock or unlock, as the case
may be, the signal rods F1 and F2, and with them the signals. As a matter
of course, in this case, any other known kind of intermediate mechanism.
may be employed.
If the official at the station desires to unlock the signal corresponding to A¹,
he turns his transmitter G¹ so as to point in the direction corresponding to the
position A', see Figure 3. The disc s secured to the receiver E³ is correspond-
ingly actuated and following the action of the transmitter, the hole I comes
under the key or push T¹, the white circle appearing at the opening f. The
locking gear composed of the lever H¹ H2 H3 and the rod S still occupies the
position which in the figure is illustrated by the lever K' K2 K³. Unlocking
cannot yet be effected, since the lever arm H³ is still prevented from moving
by the edge of the ring R.
The signal man now turns his transmitter G2 towards A whereby, in the first
place, the reply-back signal reaches the station, since the indicator E of the
station apparatus is moved or signalled simultaneously with the transmission
lever G2 of the signalling mechanism, and in the second place, the inner groove
or recess of the ring R is turned in the direction of the signal A', see Figure 1.
The lever HH2 H³ corresponding to the signal A¹ can now be moved. The
signalman depresses the key or push T, pushes this through the hole L and
thereby turns H₁ H2 H³ in the direction of the hands of a clock, whereby the
signal rod F is freed from the constraint of the locking bar S, so that I can
be moved and the signal A¹ be given, as shewn on the drawing, Fig. 2, left
hand side.
The transmission lever G2 is now locked by means of F¹, S and H¹ H² H³.
After the train has run into the receiving station, the signalman puts the signal
again to the stopping position, and brings F into the position of rest, so that
the slot in F comes under the locking-bar S¹. He then turns the transmitter
lever G again to the position of rest. By this movement H³ is forced out of the
inner recess in R, so that the signal rod F is locked as shewn on the right
hand side of Figure 2. At the same time, also, the indicator E on the receiver
belonging to the station apparatus is again brought back to the position of rest.
Finally, the official at the station puts his transmitter into the position of

page_text: rest, so that red appears at the sight hole f¹ of the signalling indicator in the
cabin and white at the sight hole f³.
The described arrangement can, as a matter of course, be applied without
trouble to any desired number of signals, in connection with which it is only
necessary to increase the number of the keys T T2, of the sight holes fl f2 f3,
of the levers H¹ H³ H³.
and
Moreover, the locking apparatus which, in the present case, is assumed to be
ring shaped, can be of any other suitable shape as may be desired.
Having now particularly described and ascertained the nature of the said
invention (as communicated to me by my foreign correspondents) and in what
manner the same is to be performed, I declare that what I claim is:--
"
A station signal-locking apparatus for electrically unlocking and mechanically
locking signal rods by means of which a definite actuating of the "signalling
mechanism is secured, consisting in the combination of a disc s arranged on
the shaft of the receiver belonging to the signalling mechanism a which is
actuated in any known manner, for instance, according to the "Drehfeld"
distance signal system, synchronously with the transmission lever G₁ of the station
apparatus, and perforated in such a manner that in definite positions of the disc,
certain locking pushes or keys T¹ T2 can be pressed down, with a locking
arrangement connected with the transmitter lever G2 of the "locking"
signalling " mechanism by means of which the locking and unlocking of the
signal rod by the corresponding "keys" is only possible after the apparatus has
been brought into the corresponding position, substantially as described.
"6
Dated this Thirteenth day of Masamhan
1000
39
or
For the Applicant,
GEDGE & FEENY,
60, Queen Victoria Street, London, E.C.,
Chartered Patent Agents.
or the Applicant,
GEDGE & FEENY,
60, Queen Victoria Street, London, E.C.,
Chartered Patent Agents.
GEDGE & FEENY,
60, Queen Victoria Street, London, E.C.,
Chartered Patent Agents.