Improvements in or relating to Facing Point Lock and Signalling Apparatus for Railways.
Year: 1898

page_text: Date of Application, 24th Jan., 1898
Complete Specification Left, 13th Oct., 1898-Accepted, 21st Jan.,
1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Facing Point Lock and Signalling
Apparatus for Railways.
We, WALTER HOLLAND, of Vulcan Iron Works, Worcester, in the County of
Worcester, Engineer, and WILLIAM GRIFFITHS and WILLIAM JOHN GRIFFITHS, both of
61, Sinclair Road, West Kensington, in the County of London, Engineers, do hereby
declare the nature of this invention to be as follows:--
This invention of improvements in facing point lock and signalling apparatus for
railways has reference to improved means designed inter alia to ensure that the
signals cannot be operated until the facing points and all parts in connection there-
with have been properly operated, and thus to obviate all liability of the signals being
operated should any one of the connections be broken or out of order.
According to one construction the facing point locking bolt which is arranged
between the rails and serves to lock the stretcher bar connected to the point, points,
or switch (hereinafter called points) is connected at one end to a facing point safety
lock bar, and one of these parts, viz. the bolt or the bar, is connected to a longitudi-
nally moveable operating rod or slide, by which the two connected parts and also it
may be the points are worked, the other part being connected to or so arranged in
relation to a detector or indicating apparatus, (hereinafter called a detector) located
at the end of the chain or series of working parts and adapted to control the main
and branch line signals, as to operate such detector at each of the to and fro
movements of such working parts, the arrangement being such that the
main and branch line signals are prevented from being operated until the lock
bolt and lock bar have been properly operated in each direction, which cannot be
done unless all the connections between the lock bolt, lock bar and longitudinally
moveable rod or slide are intact. The longitudinally moveable rod or slide may be
variously operated as for example from a hand lever in the signalman's cabin, or by a
motor device under the control of the signalman, and serve to effect all the operations.
of locking, unlocking, and moving the points and lock bar.
In one arrangement the centrally arranged sliding lock bolt provided with two
projections for holding the split stretcher bar connecting the points, in one or other
of the two positions of the latter, is connected at one end by a rod to a bell crank
which is connected by a rod to one arm of another bell crank the other arm of which
is connected to a longitudinal operating rod which is under the control of the signal-
man and is connected to a lever arın arranged to work within, or over the bifurcated
end of a lever another arm of which is connected by a rod to the connected points,
the arrangement being such that upon moving the operating rod or slide in either
direction the lock bolt will first unlock the points, then the points will be shifted
into one or other of their two positions, and then be again locked. The other end of
the lock bolt is connected by a rod to one arm of a lever another arm of which is
connected by a rod to an ordinary lock bar which is connected by another rod to one
arın of a bell crank the other arm of which is connected to a transversely arranged
rod jointed to a detector bar arranged to slide transversely through a box or casing
through which also work two or more longitudinal slides that are interposed in the con

page_text: nections between the main and branch line signals and their operating lever or levers.
The detector bar may be a notched bar and controls the movements of the two longi-
tudinal slides so that only that slide corresponding to the signal of the main or branch
line for which point rails are properly set can be operated. With the arrangement
described it will be understood that the operation of the signals is dependent upon
the points having been locked and the lock bar properly moved over and therefore
upon all the connections between the operating rod or slide and detector bar being in
working order.
To enable the two longitudinal signal slides to be worked by a single rod or wire
from the signal box, there may be combined with the points and the said longitudinal
slides selecting apparatus comprising a box or casing in which works the two
longitudinal signal slides and a coupling rod forming part of or attached to the point
lever operating rod or wire. Within the box are two hooked bars, that are pivotted
to the respective signal slides and are connected to another rod which is arranged to
slides in a transverse direction through the box and is connected by a lever arm to the
split stretcher bar between the point, so as to be operated therefrom. The hooked bars
may be connected to the transverse rod by eyes or slotted parts and have their hooked
end spaced apart and turned towards each other, the arrangement being such that
when the points are properly set for the main line the hook end of one of the bars will
be in position to be engaged by a pin or projection on the coupling rod so that the
corresponding signal can be worked, and when the points are properly set for the
branch Ene the hook end of the other bar will be brought into position to be engaged
by the pin or projection on the coupling rod and enable the branch line signal to be
worked. The detector herein before referred to may be replaced by a duplex detector
of the kind hereinafter described.
In a modified arrangement the extended lock bolt provided with two projections
and arranged between the main rails, and the lock bar to which it is connected as
hereinbefore described, are connected on the one hand as by rods and bell cranks,
with a slide adapted to be operated by a motor under the control of the signalman,
and on the other hand with an electrical or mechanical detector that controls lock
mechanism for preventing the signal operating mechanism being worked until the lock
bolt, points and lock bars have been each properly moved. The bar or slide is adapted,
as by a pin, to operate at the proper time, a bifurcated bell crank lever connected
with the points. The motor for operating the bar or slide is or may advantageously
be a pneumatic motor to and from which compressed air, supplied from a compressed
air pipe, passes under the action of electrically operated valves controlled by the
signalman, as in the Westinghouse system of working points by compressed air. The
electrical or mechanical detector is adapted at each to and fro movement of the
extended lock bolt to operate a switch or valve for controlling an electric current or
the distribution of motive fluid and through such current or fluid, signal lock
mechanism in such a way that assuming the points to be set for the main line and
locked by one of the projections on the extended lock bolt, the switch or valve will
be in a position corresponding to the unlocked condition of the main line signals
and the locked condition of the branch line signals, and on the bolt being moved
endways it will first unlock the points and permit them to be reset for the branch
line and, by continued movement, to re-lock them in the re-set position and move the
switch or valve into a position corresponding to the locked position of the inain line
signals and the unlocked position of the branch line signals. The switch may
comprise two pairs of stationary spring contacts and a movable pin, roller or other
contact carried by or operated from the lock bolt and adapted to cause a rapid make
and break. The valve may be a three way valve.
A detector adapted to be operated and to act in both directions as hereinbefore
described may be called a duplex detector and, in conjunction with an extended
lock bolt such as referred to, can be used in connection with point lock and signalling
apparatus of various kinds.
In a modified arrangement the longitudinal rod or slide, operated by a motor, for
example a compressed air motor, or by a hand lever, is suitably connected, as by rods

page_text: and bell cranks, to the lock bar which is suitably connected, as by rods and a rock
shaft with lever arms, to one end of the central extended lock bolt which has two
locking projections and the other end of which is adapted to actuate a duplex detector
of the kind hereinbefore referred to. The points may be operated as before through
a bifurcated lever from a pin or projection on the longitudinal rod or slide. The lock-
bar may be arranged at the inner side of one of the main rails, or at the outer
side thereof as may be desired, the connections being suitably arranged in each
case.
In a modified arrangement the longitudinal rod or slide is connected to a lock
bar which is arranged alongside one of the main line rails and is connected across
to a second lock bar arranged alongside the outer rail of the branch line, this second
bar being suitably connected to one end of the extended lock bolt the other end of
which is connected to a detector of the kind herein before described, are preferably
electrical ones. The two lock bars are preferably electrical ones. The two lock bars
are preferably arranged to extend longitudinally mainly beyond the points in the
direction in which the branch line passes from the main line. This arrangement is
specially advantageous for use in stations, as it obviates the necessity of shortening
the platform or the length of the train to enable the engine to stand free of the
lock bar or bars which is necessary to enable the points to be moved whilst a train is
standing in a station.
In another arrangement a longitudinal slide worked by an electrically controlled
compressed air or other motor arranged at the outer side of the main track is con-
nected, as by rods and bell cranks, to one end of an extended lock holt arranged at
the centre of the track for locking the split stretcher bar of the points, the other end
of the lock bolt being arranged to directly operate a duplex detector of the kind
herein before referred to for controlling the lock mechanism of the signal operating
devices, a lock bar being omitted.
In another arrangement in which a lock bolt and lock bar are omitted, one of the
connected pair of points is connected, as by rods and a bell crank, to the piston of a
compressed air motor of the kind herein before referred to, or other motor or rod
arranged longitudinally at the outer side of the main rails, the other point of the pair
being suitably connected, as by rods and a lever arin to a detector of one or other of
the kinds herein before described, preferably an electric one, also arranged at the outer
side of the main rails.
In a modified arrangement, the motor cylinder is arranged at right angles to and
outside the track and its piston is directly connected, i.c., without the aid of a bell
crank, to one of the points by a rod, the other point being connected as in the last
mentioned arrangement to a detector.
In a further arrangement the piston of a compressed air or other motor cylinder is
connected, as by rods and a bell crank, to a rocking train bar which is arranged along
one side of one of the main rails and is connected as by rods and a lever arin to an
electric or other detector, preferably of the kind herein before referred to, for con-
trolling the lock mechanism of signals or other devices.
Te day of Januar 1808
Improvements in or relating to Facing Point Lock and Signalling
Apparatus for Railways.
We, WALTER HOLLAND, of Vulcan Iron Works, Worcester, in the County of
Worcester, Engineer, and WILLIAM GRIFFITHS and WILLIAM JOHN GRIFFITHS, both

page_text: of 61, Sinclair Road, West Kensington, in the County of London, Engineers, 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 of improvements in facing point lock and signalling apparatus for
railways has reference to improved means designed inter alia to ensure that the
signals cannot be operated until the facing points and all parts in connection therewith
have been properly operated, and thus to obviate all liability of the signals
being operated should any one of the connections be broken or out of order.
For this purpose, according to one construction, the facing point locking bolt,
which is arranged between the rails and serves to lock the stretcher bar connected
to the point, points, or switch (hereinafter called points), is connected at one end to
a facing point safety lock bar, and one of these parts, viz. the bolt, or the bar, is
connected to a longitudinally movable operating rod or slide by which the two connected
parts, and also it may be the points, are worked, the other part being connected
to or so arranged in relation to a detector or indicating apparatus (herein-
after called a detector) located at the end of the chain or series of working parts and
adapted to control the main and branch line signals, as to operate such detector at
each of the to and fro movements of such working parts, the arrangement being
such that the main and branch line signals are prevented from being operated
until the lock bolt and lock bar have been properly operated in one or other
direction which cannot be done unless all the connections between the lock bolt,
lock bar and longitudinally movable rod or slide are intact. The longitudinally
movable rod or slide can be variously operated, as for example from a hand lever
in the signalman's cabin, or by a motor device under the control of the signalman,
and serves to effect all the operations of locking, unlocking and moving the points
and lock bar.
Fig. 1 of the accompanying illustrative drawings shows, in plan, one arrangement
of facing point lock and signalling apparatus according to this invention.
1 is the centrally arranged sliding lock bolt provided with two projections 1ª, 1b
for holding the split stretcher bar 2 connecting the points 3, in one or other of the
two positions of the latter. This lock bolt is connected at one end 1 by a rod 4 to
a bell crank 5 which is connected by a rod 6-to one arm of another bell crank 7
the other arm of which is connected to a longitudinal operating rod 8, (or it may be
to a slide as hereinafter described) which is under the control of the signalman and is
connected to a lever arm 9 arranged to work within or over the bifurcated end 10°
of a lever 10 an arm 10b of which is connected by a rod 11 to the connected points 3.
As will be seen the arrangement is such that upon moving the operating rod 8 in
either direction, the lock bolt 1 will first unlock the points 3, then the points will be
shifted into one or other of their two positions, and then be again locked. The
other end 1 of the lock bolt 1 is connected by a rod 12 to one arm of a lever 13
another arm of which is connected by a rod 14 to an ordinary lock bar 14 which is
connected by another rod 15 to one arm of a bell crank 16 the other arın of
which is connected to a transversely arranged rod 17 which is jointed at 17* to a
detector bar 18 arranged to slide transversely through a box or casing 19 through which
also work two or more longitudinal slides that are interposed in the connections
between the main and branch line signals and their operating lever or levers. The
detector bar 18 may be a notched bar and, in the example shown in full lines in
Fig. 1, controls the movements of two longitudinal slides 20, 20° attached respectively
to the connections 21, 21ª of the home signals of the main and branch lines, so that
only the slide 20 or 20ª corresponding to the signal of the main or branch line
for which the points 3 are properly set and locked, can be operated.
With the arrangement described it will be understood that the operation of the
signals is dependent upon the points 3 having been locked, and the lock bar 14 pro-
perly moved over, and therefore upon all the connections between the operating
rod 8 or its equivalent, and the detector bar 18 being intact and in proper working

page_text: order. The detector bar 18 and slides 20, 20 and 20 may be constructed and
arranged to operate in a manner now well understood.
To enable the two longitudinal signal slides 20, 20ª to be worked by a single rod
or a wire 22 from the signal box, there may be combined with the points 3 and their
stretcher bar 2, and the said longitudinal slides 20, 20ª, selecting apparatus comprising
a box or casing 23 in which works the longitudinal signal slides 20, 20° and a coupling
rod 24 which forms part of the point lever operating rod, or, as shown, is attached to
the wire 22. Within the box 23 are two hooked bars 25, 25 that are pivoted to the
respective signal slides 20, 20% at 20x and are connected to another ro: 26 which is
arranged to slide in a transverse direction through the box 23 and is connected by a
rod or link 27 and a lever arın 28 to the split or divided stretcher bar 2 between the
point 3 so as to be operated from such bar.
The hooked bars 25, 25ª may, as in the example shown, be connected to the trans-
verse rod 26 by eyes 26 or slotted parts, and have their hooked free ends spaced
apart and turned towards each other as shown, the arrangement being such that
when the points 3 are properly set for the main line, as shown, the hooked end of one
of the bars (viz. 25) will be in position to be engaged by a pin or projection 24ª
on the coupling rod 24 so that the corresponding signal can be worked, and when the
points 3 are properly set for the branch line, the hooked end of the other bar, viz. 25,
will be brought into position to be engaged by the più or projection 24ª and thus
enable the branch line signal to be worked. The split or divided stretcher bar 2 and
lever arm 28 are constructed and arranged in a well known manner and as described
in the Specification of British Patents Nos. 16666 of 1886 and 10162 of 1888,
according to which the said lever arm 28 is pivoted at 28 to one part of the split
stretcher bar and is formed with a slot 28h in which engages a pin 2ª carried by the
other part of the bar, the arrangement being such that (in addition to operating the
selecting gear in the case or box 23) should either half of the split stretcher bar
break when the same is being operated and the lock bolt 1 is disconnected therefrom,
the rod 27 and lever 28 and the selector 23 will, by their resistance to movement,
ensure the displacement of two parts of the stretcher bar, relatively to each other so.
as to prevent the lock bolt 1 and connected mechanism being operated to again lock
the points until the stretcher bar has been repaired or replaced by an unbroken one,
This combination of a split or divided stretcher bar and selecting apparatus of the
kind described is an important feature of this invention.
The detector bar 18 may be made to control the movement of one or more
additional longitudinal slides attached by a suitable connection or connections to the
distant signal or signals, of the main or branch lines. In Fig. 1, one such additional
slide 20 is shown in dotted lines, 21b being the connection by which it is attached
to the distant signal or signals of the main or branch line or to both such signals.
When two such additional longitudinal slides are used in connection with two distant
signals, a duplicate selecting gear, such as described may be used for controlling the
same; or an independent connection inay be used in the event of there being only
one such distant signal provided for the main line, or, it may be, common to both
lines.
The detector 18 hereinbefore described may be replaced by a duplex detector of
the kind hereinafter described.
Fig. 2 is a plan, showing diagrammatically a modified arrangement in which the
extended lock bolt 1 provided with two projections 1ª, 1b for engagement with the
split stretcher bar 2, and the lock bar 14 to which it is connected as herein before
described, are connected on the one hand, as by rods 4, 6 and 6ª and bell cranks 5
and 7, with a slide 22 adapted to be operated by a motor 25 under the control of the
signalman and on the other hand, as by rods 12, 14, 15 and 17 and levers 13 and 16 with
an electrical or mechanical detector 18 which controls lock mechanism for preventing
the signal operating mechanisın being worked until the lock bolt 1, points 3 and
lock bar 14 have been each properly moved. The bar or slide 22ª is adapted, as by
a pin 26 to operate at the proper time, a bifurcated bell crank lever 10 connected, as
by a rod 11, to the points 3. The motor 25 for operating the bar or slide 22" is or

page_text: may advantageously be a pneumatic motor, to and from which compressed air,
supplied from a compressed air pipe, passes under the action of electrically operated
valves controlled by the signalman, as in the well-known Westinghouse system of
working points by compressed air. The electrical or mechanical detector 18 is
adapted at each to and fro movement of the extended lock bolt 1, to operate either
an electric switch for controlling an electric current, or a valve for controlling the
distribution of motive fluid, and, through such current or fluid, signal lock mechanism
in such a way that assuming the points to be set for the main line and locked
by one of the projections 1a, 1 on the extended lock bolt 1, the switch or valve
will be in a position corresponding to the unlocked condition of the main line
signals and the locked condition of the branch line signals, and on the bolt 1
being moved endways, it will first unlock the points 3 and permit them to be re-set
for the branch line, and, by continued movement, to re-lock them in the re-set
position and move the switch or valve into a position corresponding to the locked
position of the main line signals and the unlocked position of the branch line signals.
Signal lock mechanism adapted to be thus controlled by an electric current, or by
motive fluid, is well known to those versed in the art to which this invention relates
and therefore need not be further described. The switch for controlling the electric
current may, as shown in sectional plan, and to an enlarged scale, in Fig. 3, comprise
two pairs of stationary spring contacts 18", 18" and a movable pin 18°, or it may be a
roller or other contact that is carried by or operated from the lock bolt 1, or lock
bar 14, and is arranged to effect a rapid make and break when moved from one of its
extreme positions to the other in either direction. The contacts 18ª may control the
main line signals and the contacts 18 the branch line signals. This type of
switch, for the purpose mentioned, is well known. In Fig. 2 the contact 18°
is operated by the detector bar 18 connected to the lock bar 14.
Fig. 4 shows in plan an arrangement in which a valve 29 adapted to be
operated in both directions from the lock bolt 1 or lock bar 14, is arranged in
connection with a pipe 29" for controlling the passage of fluid under pressure there-
from by pipes 29° 29° to signal lock mechanism of the kind herein before referred to.
29d are exhaust ports.
A detector adapted to be operated and to act in both directions as herein before
described, may be called a duplex detector and, in conjunction with an extended lock
bolt 1 such as referred to, can be used in connection with point lock and signalling
apparatus of various kinds.
Figs. 5 to 14 inclusive show diagrammatically in plan, various modified arrangements
of apparatus according to this invention.
In Fig. 5 the longitudinal rod or slide 22" operated by a motor 25, for example a
compressed air motor, or it may be by a hand lever, is suitably connected, as by rods
30 and bell cranks 31, to the lock bar 14 which is suitably connected, as by rods 32
and a rocking shaft 33 with lever arms 34, to one end of the central extended lock
bolt 1 which has two locking projections as before, and the other end of which is
adapted to actuate a duplex detector of the kind hereinbefore referred to located
at 18". The points 3 may be operated, as before, through a bifurcated lever 10 from
The lock bar 14 may be
a pin or projection 26 on the longitudinal rod or slide 22ª.
arranged at the inner side of one of the main rails as shown in Fig. 5, or at the outer
side thereof as shown in Fig. 6, as may be desired, the connections being suitably
arranged in each case, as shown.
In Fig. 7 the longitudinal rod or slide 22ª is connected to a lock bar 14 which is
arranged alongside one of the main line rails and is connected across, as by rods 35
and bell cranks 36, to a second lock bar 14ª arranged alongside the outer rail of the
branch line, this second bar being suitably connected, as by rods 32 and bell cranks 34,
to one end of the extended lock bolt 1 the other end of which is connected to a
The
detector at 18ª of the kind hereinbefore described, preferably an electrical one.
two lock bars 14, 14" are preferably arranged to extend longitudinally mainly beyond
the points 3 in the direction in which the branch line passes from the main line. This
arrangement (Fig. 7) is specially advantageous for use in stations, as it obviates the

page_text: necessity of shortening the platform, or the length of the train, to enable the engine
to stand free of the lock bar 14 or bars 14, 14ª which is necessary to enable the
points 3 to be moved whilst a train is standing in the station.
In Fig. 8, a longitudinal slide 22" worked by an electrically controlled compressed
air or other motor 25 is connected, as by rods 37 and bell cranks 38, to one end of the
extended lock bolt 1 arranged at the centre of the track for locking the split stretcher
bar 2 of the points 3 which are operated from the lever 10, the other end of the
said lock bolt being arranged to directly operate a duplex detector at 18ª of
the kind herein before referred to for controlling the lock mechanism of the signal
operating devices, a lock bar being omitted.
Fig. 9 shows a modified arrangement in which the lock bolt and lock bar are
omitted. In this arrangement the longitudinal rod or slide 22ª operated by a motor
device 25, or it may be by a hand lever, in either case under the control of the
signalinan, actuates the points 3 by means of a pin or projection 26 on the slide
or rod 22 working through a bifurcated lever 10 suitably connected
to
the points 3 as by a rod 11 as in Fig. 8 but the split stretcher bar 2 is
connected by a lever arm 28 to a notched bar 26 arranged to work transversely
through a box or case 23ª through which works in a longitudinal direction, the
slide or rod 22ª upon which are provided locking projections that correspond to
the projections 1ª, 1b on the bolt 1 in Fig. 1, and enter one or other of two notches
in the transverse bar 26ª when the points are properly set in one or other of
their two positions. The duplex detector is situated over and actuated by the
slide or rod 22 when the notched bar is in a position to enable the slide or rod to
complete its stroke in either direction.
The notched bar 26" is suitably connected, as by a rod 27, to a lever arm 28
which is connected to the two portions of the split stretcher bar 2 in the manner
herein before described with reference to Fig. 1, so that if either of the points 3
fail to work properly, the lever arm 28 will be affected in suh a manner that the
locking projections on the slide or rod 22ª will not enter the notches in the transverse
bar 26 and the slide or rod 22" cannot complete its full stroke and to actuate the
duplex detector located at 18ª.
Fig. 10 shows another arrangement by which a similar result can be attained, viz.
by leading through the box or case 23, two separate transverse notched bars 26" and
rods 27ª, 27 connected one to each point 3. The operations of the motor device 25
(or hand lever) slide or rod 22" and the bi-furcated lever 10 for working the points 3,
is substantially the same as in the arrangement shown in Fig. 9, and the duplex
detector at 18" is similarly situated and operated.
Fig. 11 shews a further modified arrangement whereby a similar result can be
attained by connecting to the points 3 two separate rods 27 27 the other ends of
which are suitably connected to a lever 27° to the centre of which is connected the
transverse notched bar 26" passing through the box or case 23". The operations of
the motor device 25 (or hand lever) slide or rod 22ª, and the bi-furcated lever 10 are
substantially the same in the arrangement shown in Fig. 9 the duplex detector at
18 being similarly situated and operated.
Fig. 12 shows another arrangement in which a lock bolt and lock bar are omitted,
one of the connected pair of points 3 being connected as by rods 39 and a bell
crank 40 to the piston of a compressed air motor 25 of the kind herein before referred to,
or other motor or rod arranged longitudinally at the outer side of the main rails, and
the other point 3 of the pair being suitably connected, as by rods 41 and a lever
arm 42 to a detector at 18" of one or other of the kinds hereinbefore described, preferably
an electric one, also arranged at the outer side of the main rails.
In Fig. 13 the motor cylinder 25 is arranged at right angles to and outside the
track and its piston is directly connected i.e. without the aid of a bell crank, to
one of the points 3 by a rod 43, the other point 3 being connected by rods 41 and
lever arın 42, as in the last mentioned arrangement, to a suitable detector at 18".
In Fig. 14 the piston of a compressed air or other motor cylinder 25 is connected,
as by rods 43 and a bell crank 44, to a rocking train bar 14 arranged along one side

page_text: of one of the main rails and connected as by rods 45 and a lever arm 46 to an electric
or other detector at 18a preferably of the kind herein before referred to, for controlling
the lock mechanism of signals or other devices.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. Facing point lock and signalling apparatus wherein the facing point locking
bolt is connected at one end to a facing point safety lock bar and one of these parts
viz. the bolt or the bar is connected to an operating rod or slide by which the two
connected parts and also it may be the points are operated, and the other part is
connected to or so arranged in relation to a detector or indicating apparatus located
at the end of the chain or series of working parts and adapted to control the main and
branch line signals as to operate such detector at each of the to and fro movements
of such working parts but only in the event of all the connections between the lock
bolt, lock-bar and operating rod or slide being intact and in proper working order,
substantially as herein described for the purposes specified.
2. In facing point lock and signalling apparatus, the combination with a split
or divided stretcher bar of the kind herein referred to connecting the points, and
longitudinal slides interposed in the connections between the main and branch line
signals and their operating mechanism, of selecting apparatus of the kind herein
referred to connected to the said stretcher bar through a rod and lever, substantially
as hereinbefore described.
3. Facing point locking and signalling apparatus constructed, arranged and
operating substantially as hereinbefore described with reference to and shown in
Fig. 1 of the accompanying drawings, whether the slides connected with the main
and branch line signals be operated by separate rods or wires, or by a single rod or wire
through a selecting apparatus, as set forth.
4. Facing point locking and signalling apparatus constructed, arranged and operating
substantially as herein before described with reference to and shown in Fig. 2 of the
accompanying drawings.
5. The combinations and arrangements of parts constituting the several constructions
of facing point lock and signalling apparatus substantially as herein before described
with reference respectively to and shown in Fig. 5; in Fig. 6; in Fig. 7; in Fig. 8;
in Fig. 9; in Fig. 10; in Fig. 11; in Fig. 12; in Fig. 13; in Fig. 14 of the
accompanying drawings.