Improvements in Working the Traffo on Single Lines of Railway, and Apparatus for that Purpose.
Year: 1896

page_text: Date of Application, 27th Apr., 1896
Complete Specification Left, 20th Jan., 1897-Accepted, 13th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in Working the Traffo on Single Lines of Railway,
and Apparatus for that Purpose.
1, EDWARD TYER of Ashwin Street Dalston in the County of Middlesex Engineer
and ROBERT WILKINSON TWEEDY of Metcalf Street Carlisle, Engineer, do horeby
declare the nature of this invention to be as follows:-
This invention relates to the working of the traffic on single lines of railway,
having between the principal stations certain intermediate stations, which have to be
cut out at night or at other times, leaving the lino free for traffic through them, these
stations, as well as the principal stations, being provided with apparatus according to
our invention for onsuring safety in whichever way the traffic may be worked.
Parts of the apparatus which we employ are of the kinds described in previous
Specifications No. 1262 of 1878, No. 42 of 1888, No. 5928 of 1890, No. 1904 of
1891, No. 18603 of 1891, No. 12144 of 1893 and No. 14001 of 1894, according
to which the issue from a station of a tablet or staff, to be carried by a train to a
station beyond, is electrically controlled in such a manner that two trains cannot be
on the samo section of the line at the same time. Besides the tablet or staff con-
trolling apparatus for ordinary working such as are described in the specifications
above referred to, we provide at each station, as may be required, an additional
special tablet or staff exchanging apparatus of a kind described in the previous
Specification No. 12144 of 1893, which is employed when the intermediate stations
are to be cut out.
At each of the intermediate stations there is a loop lino which should not be
traversed by through trains, and there are signals norimally standing at "danger'
which, if obeyed, would stop through traffic. We therefore provide, at oach inter-
mediate station, cortain special point and signal apparatus for switching out the loop
line and also for lowering all the signals which would otherwise stand at "danger,"
as for ordinary traffic. This apparatus, when worked, moves the set of points that
usually connect the loop to the main line, and fixes them for direct through running,
and at the same time lowers all the signals. This apparatus which is interlocked
with the point and signal levers cannot be worked unless all conflicting levers are
in their normal position, and then it can only bo unlocked by a special key. It is,
moreover, interlocked with an electrical switch instrument which cannot be acted on
by that key until the special point and signal apparatus has completed its operations.
The key can then be inserted into the electrical switch instrument, and turned, which
bas the effect of disconnecting the local battery from the tablet apparatus, and also
of electrically connecting the to and fro lines so as to make the conductor lino
continuous through the intermediate station. This action also back-locks the special
point and signal apparatus in its altered condition.
Such being the apparatus provided at the terminal and intermediate stations, the
mode of operating so as to cut out the intermediate stations is as follows:-
In order to simplify explanation, we may assume that there are three successive
stations A, B and C of which the intermediate station B is occasionally cut out by
operating from A. For this purpose A first obtains an ordinary tablet and then, by the
special key, unlocks his tablet exchanging apparatus and sends the ordinary tablet along
with the key on to B, who by means of the key unlocks his special point and signal

page_text: apparatus. Having worked this apparatus and so set the road and lowered the
signals for through traffic, he removes the key and inserts it into the electrical switch
instrument and thereby hack-locks the special point and signal apparatus in its
altered condition and at the same time disconnects the tablet instruments at B from
the battery, and connects together the line wires to A and C thus rendering the
conducting line continuous.
From B the train proceeds with the key and an ordinary tablet which tablet is
inserted into the tablet apparatus at C in the usual way, and the key being inserted into
the tablet exchanging apparatus at C unlocks it, so that it can now be used for
issuing and receiving the special tablets appropriated to through traffic.
We have described the operation of cutting B out of traffic as originating at A,
but obviously the same operation can originate at C; and if, instead of one inter-
mediate station, there were several, each of them would be provided with the
electrical switch instrument and with the special point and signal apparatus interlocked
with it, and the operations of introducing and taking out the tablet, the unlocking,
working and relocking of the special point and signal apparatus, and the action on
the electrical switch and tablet instruments, all as described for one intermediate
station, would be repeated at the successive intermediate stations, putting them all in
the condition of having the through roads open and the signals lowered for trains
running both ways; and of having their tablet instruments cut off from the line
wire, which at the same time is rendered continuous through them. Obviously by
suitably modifying the tablet apparatus, it could be adapted for use with a staff
instead of a tablet. The restoration of the intermediate stations to use for traffic is
effected by a sories of inverse operations with tablet or staff and tho koy.
Dated this 27th day of April 1896.
ABEL & IMRAY,
Agents for the Applicants.
Improvements in Working the Traffic on Single Lines of Railway,
and Apparatus for that Purpose.
We, EDWARD TYER, of Ashwin Street, Dalston, in the County of Middlesex,
Engineer, and ROBERT WILKINSON TWEEDY, of Metcalf Street, Carlisle, Engineer,
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 :-
This invention relates to the working of the traffio on single lines of railway,
having between the principal stations certain intermediate stations which have to be
cut out at night or at other times, leaving the line free for traffic through these
stations as well as the principal stations, being provided with apparatus according to
our invention for ensuring safety in whichever way the traffic may be worked.
Parts of the apparatus which we employ are of the kinds described in previous
Specifications No. 1262 of 1878, No. 42 of 1888, No. 5928 of 1890, No. 1904 of
1891, No. 18603 of 1891, No. 12144 of 1893, and No. 14001 of 1894, according
to which the issue from a station of a tablet or staff, to be carried by a train to a
station beyond, is electrically controlled in such a manner that two trains cannot be
on the same section of the line at the same time. Besides the tablet or staff
controlling apparatus for ordinary working such us are described in the specifications
above referred, we provide at each stution, as may be required, an additional special
tablet. staff exchanging apparatus of a kind described in the previous

page_text: Specification No. 12144 of 1893 which is employed when the intermediate stations
are to be cut out.
At each of the intermediate stations there is a loop line which should not be
traversed by through trains, and there are signals norinally standing at "danger
which, if obeyed, would stop through traffic. We therefore provide, at each inter-
mediate station, certain special point and signal apparatus for switching out the loop
line and also for lowering all the signals which would otherwise staud at "danger" as
for ordinary traffic. This apparatus when worked, moves the set of points that
usually connect the loop to the main line, and fixes them for direct through running,
and at the same time lowers all tho signals. This apparatus, which is interlocked with
the point and signal levers cannot be worked unless all conflicting levers are in their
norinal position and then it can only be unlocked by a special key. It is, moreover,
interlocked with an electrical switch instrument which cannot be acted on by that
koy until the special point and signal apparatus has completed its operations. The
key can then be inserted into the electrical switch instrument, and turned, which has
the effect of disconnecting the local battery from the tablet apparatus, and also of
electrically connecting the to and fro lines so as to make the conductor line continuous
through the intermediate station. This action also back locks the special point and
signal apparatus in its altered position.
Figure 1 of the accompanying drawings is a back view of the apparatus and
Figure 2 is a side view with the casing of the lock removed to shew the interior.
W is a hand wheol which by means of bevil gear works a screw having on it a
nut N. A spoke of the wheel W has holes to recoivo the bolts wo and to' of two looks
for which a single key is employed. In the lock case are arranged a number of
electrical spring contacts counecting lines as follows.
1 and 4 to + terminal of local battery. -2, 7, and 10 to tablet instrument
communicating with station A, - 3 and 5 to + terminal of local sending circuits.
-6 to of relay. - 8 and 11 to tablet instrument communicating with C.
9 to line wire to C. 12 to line wire to A. A magnet M when excited attracts
its armature m thereby releasing a lever L which on dropping alters a contact at 1;
the bolt to when moved back, breaks a contact at v, and the bolt o' when shot forward
breaks contact at o' and . An arm to is connected by rods to to an interlocking
bar in the frame of the point and signal levers. When the points are set and
the signals lowered for admitting a train from the one direction say from station A,
the movement of the bolt to the position shewn locks all these levers. The
nut N is connected by rods n to the pulls for lowering the signals admitting a
train from the opposite direction, say from station (C).
A rod the lower end of which rests on the nut N has a projection v' which
maintains a contact, but when the nut begins to descend this contact is broken.
A rod urged upwards by a spring enters a notch of the bolt to preventing
it frem being moved forward until the nut N approaching the lower end of its
stroke nets on a projection from pushing o' down and so releasing the bolt to¹.
We have described a wheel W working a nut N for the purpose of lowering the
necessary signals. for admitting a train from C. Obviously a lever such as is
ordinarily employed for lowering signals could be substituted for the wheel and
nut, this lever having on it a segunent moving with it and sufficiently wide to
present holes for each of the two bolts when the lever is in each of its two extreme
positions.
The apparatus described being provided at the station B intermediate to A and O,
the operation of switching out station B by a train proceeding from A is effected as
follows:
A calls B for permission to withdraw a tablet from his instrument, having doue
so, he unlocks his tablet exchanging apparatus and sends the tablet and key by
train to B. The signalman at B, expecting tho train, calls C for pormission to
withdraw the tablet, and thus prevents C from sending any train towards B. On
the train from A reaching B, the tablet is inserted in the instrument which com-
municates with A. The signalman at B then moves all the point and signal lovers

page_text: *required to admit trains from A, and then by key withdraws the. lower bolt to, and
the upper bolt being already withdrawn, he can now turn the wheel W, thus
locking all the levers already noved, and lowering all the signals for admitting
trains from C. The bolt by its back movement by breaking contact at o
ilisconnects the local battery from the tablet iustraments. The signalman then by
'means of the key shoots the upper bolt to go as to lock the wheel W in the
position to which it has been turned. This bolt by a projection acting on the
contact disconnects the tablet instrument from the line wire to A, and by another
projection pnts contacts in such a condition that when the train arrives at C and
the tablet taken from B is inserted into the instrument at C, a current excites
the electromagnet M and the lever I descends, disconnecting the tablet instrument
at B from the line wire to C, and connecting at the line wires to A and C for
transinission of currents right through, without any connection to instruments at B.
While station B is switched out as above described the train traffic between A
and C is conducted as follows:
A being permitted by C takes a round tablet from his instrument and places it
in the exchanging instrument, from which he takes a square tablet, and sends this
by train to . At C the square tablet is placed in the exchanging instrument from
which a round tablet is taken and inserted in the usual tablet instrument by which
the road to A is cleared in the usual manner.
The station B is re-oponed from O in the following manner.
The exchange instrument at C being locked, and a round tablet being taken out of
the ordinary instrument by permission of A, the key and tablet are sent by train
to B, when the upper bolt is withdrawn and the wheel W is turned back, thus
raising the signals which had been lowered by it and disconnecting the line wire A
to C. The lower bolt in is then shot locking the wheel and connecting the local
battery at B to the tablet instruments there. The tablet brought from Cis put into
the one tablet instrument at B, and a fresh tablet boing, by permission of A, taken
from the other tablet instrument at B, this tablet and the key are sent by train to A,
where the tablet exchange instrument is locked until B has to be switched ont
again.
We havo described the operation of cutting B ont of traffic as originating at A,
I but obviously the same operation can originate at C, and if instead of one intermediate
station, there were several, each of them would be provided with the electrical switch
instrument and with the special point and signal apparatus interlocked with it, and
the operations of introducing and taking out the tablet, the unlocking, working and
relocking of the special point and signal apparatus, and the action on the electrical
switch and tablet instruments, all as described for one intermediate station, would be
repeated at the successive intermediate stations, putting them all in the condition of
having the through ronds open and the signals lowered for trains running both ways,
and of having their tablet instruments cut off from the line wire, which at the saine
time is rendered continuous through them.
Obviously by suitably modifying the tablet apparatus it could be adapted for use
with a staff instead of a tablet.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The herein described method of switching out and in intermediate stations on
single lines of railway.
2. The combined point, signal and electrical switch apparatus at an intermediate
station, arranged and operating substantially as described.
10117
ABEL & IMRAY,
Agents for the Applicants.