Improvements in Fog-signalling Apparatus for Railways.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Fog-signalling Apparatus for Railways.
We, MITCHELL WATERHOUSE, of 27, Claremont Street, Sowerby Bridge, in the
County of York, Assistant Water Manager, JOSEPII BENJAMIN MITCHELL, of 11,
Carlton Street, Saville Town, Dewsbury, Signalman, and Lewis EdwaRD ROBINSON,
of Green Mount, Central Street, Dewsbury, Wagon Lifter, both also in the
County of York, do hereby declare the nature of this invention to be as follows:-
Our invention refers to apparatus whereby a cartridge is exploded or detonated
by a passing or approaching train, so as to give a signal to the driver of such
train; the apparatus being so controlled by the signalman or locked with the
signalling apparatus that an explosion or detonation is only brought about by an
engine or train, when it is required to do so.
In the following description it is presupposed, that the apparatus is connected
with a two arm signal post, that is one in which the one (lower) arm constitutes
the distant signal, and the other (upper) arm the home signal, and in which case
the cartridge is detonated or exploded when the train comes up alongside the
cabin or signal post.
The apparatus can however be applied to other signalling arrangements than
those supposed; as for example, two apparatus can be used on one line, the one
alongside a distant signal post, and the other alongside a home signal post, so
as to give a detonation when passing the the distant signal post, as well as on
coming up to the home signal post.
Our improved apparatus comprises:
A cartridge wheel containing round holes or recesses placed uniformly round
the wheel near its circumference, to receive the cartridges. The cartridge wheel
is rotated at the proper times by means of a ratchet wheel, attached to the
cartridge wheel, and a pawl lever pivotted on the common axis of the cartridge
and ratchet wheels; the pawl lever being moved by the engagement of its lower
end in a diagonal slot in a cross slide. The ratchet wheel has the same number
of teeth as there are cartridge holes in the cartridge wheel, and the stroke of the pawl
lever is such as to rotate the cartridge wheel each time it is moved, by by a distance
equal to that between two successive cartridges holes. A tube guide is attached
to one of the standards or sides carrying the axle of the cartridge wheel, in which
tube a firing pin works to produce the explosion or detonation of a cartridge,
when the cartridge has been carried round by the wheel into position opposite the
said tube guide. The firing pan is attached to one end of a hinged trigger lever,
the lower end of which is pushed back or cocked by the movement of the before
mentioned cross slide, which movement also compresses a strong spring. On the
release of the said cross slide, by means hereinafter described, the spring operates
the trigger lever to fire the cartridge, and at the same time moves back the cross
slide to its original position.
On one side of the cartridge wheel and immediately over the aforesaid cross
slide, is provided a slide box, in which guides or bearings are provided for the

page_text: before mentioned cross slide, and for the following slides which work at right
anglos to the cross slide.
A bottom slide, immediately over the said cross slide, is connected at one
end by a link and lever to a horizontal cross shaft, extending to one of the line
rails. This cross shaft carries at this end a cam shaped lever, hereinafter termed
the wheel bar, which in one position projects sufficiently to be caught by the
wheels of the engine, and to be depressed when the engine wheel passes over
it; and thus moves, through the connection just mentioned, the bottom slide into
such a position as to release the cross slide and to allow the before mentioned
mechanism to explode or detonate the cartridge. The end of the cross slide
within the slide box carries a vertical pin, the upper end of said pin fitting and
being guided in a straight alot in the cover of the slide box; said slot being
parallel to the motion of the cross slide. The bottom slide is formed with a
rectangular notch, which has one of its exterior corners slightly rounded. When
the full breadth of this slide is opposite the aforesaid vertical pin, the cross
slide is held back, and the trigger spring held compressed; but when the bottom
slide is moved, by the engine wheel depressing the before mentioned wheel bar,
the notch is opposite the vertical pin, so that the compressed spring can act and
push back the cross slide and fire the cartridge. The bottom slide is further
provided with two lugs or projections on its upper surface, of which the one
serves to catch against a pin attached to and depending from the top slide, and
the other to catch against a similar lug on the underside of the slide immediately
above, and which slide is hereinafter termed the middle slide.
The middle slide is provided with a horizontal alot, through which the just
before mentioned depending pin (from the top slide) passes. On the upper side
of the middle slide is provided a lug, which comes in contact with the lower
ends of pins secured in the hereinafter mentioned signal slides. The middle
slide is further formed with a notch, one of the sides of which is formed inclined,
so as to serve as a cam; which on coming in contact with the vertical pin in
the cross slide, pushes back the cross slide and compresses the trigger spring.
This middle slide is connected at one end by means of rods or wires with an
operating lever or crane in the signal cabin, and at the other end with a weight
lever or spring to bring the slide back to its original position.
Between the middle slide and the top slide are placed side by side two narrow
slides, herein called the signal slides; which are connected to the levers operating
the home and distant signals respectively. Each of these slides carries a vertical
pin projecting both upwards and downwards.
In the case of a one armed post, these signal slides are unnecessary and are
dispensed with, the top slide in this case being connected to the signal levor.
The top slide is provided with a depending pin, which passes downwards past
the signal slides, through the before mentioned slot in the middle slide, and
far enough to come in line with the lug on the upper side of the bottom slide.
Also with two short longitudinal slots placed side by side, and through which the
upper ends of the pins from the signal slides respectively pass. Towards one
end of, and between the two slots, is pirotted a right angled bell crank lever.
so that a movement of one of the signal slides can take place without
moving the top slide, but if the second signal slide is moved, or both are moved
together, the upper slide is compelled to partake of the movement. By means
of the before mentioned depending pin, this movement of the top slide is imparted
to the bottom slide, which depresses the wheel bar out of the level of contact
with the engine wheel, and would free the cross slide and trigger mechanism,
but for the interposition of the angular projecting part of one of the sides of a
notch in the top slide, which projecting part is by this movement brought in
front of the vertical pin in the cross slide.
In the working of the apparatus, the first manipulation is to pull the operating
lever or crane, and thus move the middle slide so as to force back the cross slide
and compress the trigger spring, and the latter part of this movement of the

page_text: middle slide moves the bottom slide to elevate the wheel bar, and at the same time
brings the rectangular notch of the bottom slide just out of line with the vertical
pin of the cross slide. The latter part of this movement also moves the top slide
slightly, so that the said vertical pin is in a line with the notch in the top slide.
In these positions, the operating lever or crane can be released, the apparatus
being held cocked by the bottom slide, the said wheel bar corresponding to a
trigger. Both signal slides are at the same time in position corresponding to
the signals boing on, that is against a train, in which position the vertical pins
of the signal slides are both at the ends of the slots behind the bell crank lever.
If now the distant signal is lowered to accept a train, the movement of the corre
sponding signal slide merely pushes to one side the before mentioned bell crank
lever, and the detonator would still be fired on the engine reaching the apparatus.
If however the home signal is also lowered to accept a train, the movement of
the signal lever operates the second signal slide, which latter then moves forward
the top slide preventing as above described the firing of the cartridge. The top
bar thus holds the firing pin out of action, until it is moved back by the move-
ment of the operating lever or crane and middle and bottom slides as above
described, so that a cartridge can only be fired by the depression of the wheel
bar by a train passing over it.
A fog trumpet can be connected to the apparatus to direct the sound towards
the driver, and the apparatus is suitably boxed in to protect it from the weather.
It will be evident that this apparatus can be adopted with other signalling
arrangements, as above mentioned, besides those more especially referred to.
1. 1409
Improvements in Fog-signalling Apparatus for Railways.
We, MITCHELL WATERHOUSE, of 27, Claremont Street, Sowerby Bridge, in the
County of York, Assistant Water Manager, JOSEPI BENJAMIN MITCHELL, of 11,
Carlton Street, Saville Town, Dewsbury, Signalman, and LEWIS EDWARD ROBINSON,
of Green Mount, Central Street, Dewsbury, Wagon Lifter, both also in the
County of York, 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:-
Our invention refers to apparatus whereby a cartridge is exploded or detonated
by a passing or approaching train, so as to give a signal to the driver of such
train; the apparatus being so controlled by the signal-man or locked with the
signalling apparatus, that an explosion or detonation is only brought about by an
engine or train, when it is required to do so.
In the following description it is presupposed, that the apparatus is connected
with a two arm signal post, that is one in which the one (lower) arm constitutes
the distant signal, and the other (upper) arm the home signal, and in which case
the cartridge is detonated or exploded when the train comes up alongside the
cabin or signal post.
The apparatus can however be applied to other signalling arrangements thau
those supposed; as for example, two apparatus can be used on one line, the one
alongside the distant signal post, and the other alongside a home signal post, so
as to give a detonation when passing the distant signal post, as well as on coming
up to the home signal post.

page_text: Our improved apparatus comprises:
A cartridge wheel containing round holes or recesses placed uniformly round
the wheel near its circumference, to receive the cartridges. The cartridge wheel
is rotated at the proper times by means of a ratchet wheel, attached to the
cartridge wheel, and a pawl lever pivotted on the common axis of the cartridge
and ratchet wheels; the pawl lover being moved by the engagement of its lower
end in a diagonal slot in a cross slide. The ratchet wheel has the same number
of teeth as there are cartridge holes in the cartridge wheel, and the stroke of the pawl
lever is such, as to rotate the cartridge wheel each time it is moved, by a distanco
equal to that between two successive cartridge holes. A tube guide is attached
to one of the standards or sides carrying the axle of the cartridge wheel, in which
tubo a firing pin works to produce the explosion or detonation of a cartridge,
when the cartridge has been carried round by the wheel into position opposite the
said tube guide. The firing pin is attached to one end of a hinged trigger lever,
the lower end of which is pushed back or cocked by the movement of the before
mentioned cross slide, which movement also compresses a strong spring. On the
release of the said cross slide, by means hereinafter described, the spring operates
the trigger lever to fire the cartridge, and at the same time moves back the cross
slide to its original position.
On one side of the cartridge wheel and immediately over the aforesaid cross
slide, is provided a slide box; in which guides or bearings are provided for the
before mentioned cross slide, and for the following slides which work at right
angles to the cross slide.
A bottom slide, immediately over the said cross slide, is connected at one
end by a link and lever to a horizontal cross shaft, extending to one of the line
rails. This cross shaft carries at this end a cam shaped lever, hereinafter termed
the wheel bar, which in one position projects sufficiently to be caught by the
wheels of the engine, and to be depressed when the engine wheel passes over
it; and thus movos, through the connection just mentioned, the bottom slide into
such a position as to release the cross slide, and to allow the before mentioned
mechanism to explode or detonate the cartridge. The end of the cross slide
within the slide box carries a vertical pin, the upper end of said pin fitting and
being guided into a straight slot in the cover of the slide box; said slot being
parallel to the motion of the cross slide. The bottom slide is formed with a
rectangular notch, which has one of its exterior corners slightly rounded. When
the full breadth of this slide is opposite the aforesaid vortical pin, the cross
slide is held back, and the trigger spring held compressed; but when the bottom
slide is moved, by the engine wheel depressing the before mentioned wheel bar,
the notch is opposite the vertical pin, so that the compressed spring can act and
push back the cross slide and fire the cartridge. The bottom slide is further 4
provided with two lugs or projections on its upper surface, of which the one
serves to catch against a pin attached to and depending from the top slide, and
the other to catch against a similar lug on the underside of the slide immediately
above, and which slide is hereinafter termed the middle slide.
The middle slide is provided with a horizontal slot, through which the just 4
before mentioned depending pin (from the top slide) passes. On the upper side
of the middle slide is provided a lug, which comes in contact with the lower
ends of pins secured in the hereinafter mentioned signal slides. The middle
slide is further formed with a notch, one of the sides of which is formed inclined,
so as to serve as a cam; which on coming in contact with the vertical pin in 5
the cross slide, pushes back the cross slide and compresses the trigger spring.
This middle slide is connected at one end by means of rods or wires with an
operating lever or crane in the signal cabin, and at the other end with a weight
lever or spring to bring the slide back to its original position.
Between the middle slide and the top slide are placed side by side two narrow 5
slides, herein called the signal slides; which are connected to the levers operating

page_text: the home and distant signals respectively. Each of these slides carries a vertical
pin projecting both upwards and downwards.
In the case of a one-armed post, these signal slides are unnecessary and are
dispensed with; the top slide in this case being connected to the signal lever.
The top slide is provided with a depending piu, which passes downwards past
the signal slides, through the before mentioned slot in the middle slide, and
far enough to como in line with the lug on the upper side of the bottom slide.
Also with two short longitudinal slots placed side by side, and through which the
upper ends of the pins from the signal slides respectively pass. Towards one
end of, and between the two slots, is pivotted a right angled bell crank lever or
quadrant, so that a movement of one of the signal slides can take place without
moving the top slide, but if the second signal slide is moved, or both are moved
together, the upper slide is compelled to partake of the movement. By means
of the before mentioned depending pin, this movement of the top slide is imparted
to the bottom slide, which depresses the wheel bar out of the level of contact
with the engine wheel, and would free the cross slide and trigger mechanism,
but for the interposition of the angular projecting part of one of the sides of a
notch in the top slide, which projecting part is by this movement brought in
front of the vertical pin in the cross slide.
It will be evident that the slides contained in the slide box together with the
cross slide and the connections to the rails, signal posts and cabin as above
described can be used in connection with a signal gong or bell, or other sound
producing apparatus in place of the cartridge wheel, and that in such case tho
above mentioned ratchet mechanism becomes unnecessary.
And in order that our invention, and the manner in which the same is to be
performed, may be more readily and clearly understood, we have annexed hereto
the accompanying drawings, in which Fig. 1 is a plan of a fog signalling
apparatus constructed in accordance with our invention. Fig. 2 is a side elevation
from the line side of the apparatus. Fig. 3 is an end elevation, and Fig. 4 is
a detached side elevation of the slide box. Figs. 5 to 12 are plans and sido
views of the various slides to be hereinafter more particularly referred to.
a is the cartridge wheel, containing round holes 6 or recesses, placed uniformly
round it near its circumference to receive the cartridges. The cartridge wheel a
is rotated at the proper times by means of a ratchet wheel e, attached to the
cartridge wheel, and a pawl lever d, carrying a pawl e; the pawl lever & being
pivotted on the common shaft f of the cartridge and ratchet wheels. The pawl
lever dis moved by the engagement of its lower end in the diagonal slot g
(indicated by dotted lines in Fig. 1) in the cross slide h. The number of teeth
on the ratchet wheel is the same as the number of cartridge holes 6 in the
cartridge wheel a, and the stroke of the pawl lever is such, as to rotate the
cartridge wheel a each time it is moved by an angular distance equal to that
subtended by the space between two adjoining cartridge holes.
To ensure the cartridge wheel a coming to rest each time with the cartridge
hole accurately opposite the firing hammer, we provide a ratchet wheel c¹ having
radial teeth, and a pawl el pivotted to the end standard j¹. A projecting pin p³,
Fig. 3, attached to the upper end of the pawl lever d, raises the pawl e during
the latter part of the return or back stroke of the pawl lever d, and the first
part of the forward stroke; allowing the pawl el to engage the teeth of the ratchet
wheele just as the pawl e finishes moving the ratchet wheel c, thus holding the
shaft and cartridge wheel a locked accurately in position.
A tube guide, not shewn, may be attached to one of the sides or standards j
carrying the shaft f of the cartridge wheel, in which tube a firing pin works to
produce the explosion or detonation of a cartridge, when the cartridge has been
carried round by the wheel a into position opposite the firing pin. The firing
pin is attached to one end of a hinged hammer lever ; or as shown in the draw-
ings, the head of the hammer lever may be pin pointed, the lower end of which
may be pushed back or cooked by the movement in one direction of the before

page_text: mentioned cross slide h, which movement also compresses a strong spring, (not
shown), the latter on the release of the cross slide has hereinafter described
actuates the hammer lever to fire the cartridge, and at the same time moves
back the cross slide to its original position. The hammer lever inay however be
actuated by a weight as shewn in the drawings. In this case the hammer lever
is hinged to a cross shaft m Fig. 3, journalled in the top of the side standards j.
Chain pulleys and o, preferably cam shaped, are attached on opposite ends of
the shaft m, and chains p and q are wrapped round the pulleys n and o respectively
in opposite directions. The lower ends of chains
Pand
2 are respectively attached
to levers rands on opposite ends of a cross shaft t, journalled in the lower part
of the side standarls j; the levers and s extending out from the shafts in
opposite directions, the lever having a weight attached to its end. A third
lever is hinged in the middle of the cross shaft t, so that its lower end engages
in a hole or recess Fig. 1, in the cross slide h, so that the movement of the
cross slide in one direction raises the weighted lever ; whilst on the release
of the cross slide the weighted lever falls, and rotates the cross shaft m,
causing the pin end of the head of the hammer lever to strike against the
cartridge, and the same fall of the lever r, moves the lever u so as to draw back
the cross slide h to its original position.
On one side of the cartridge wheel a and immediately over the cross slide /
is provided a slide box, the frame only of which is shewn, in which guides or
bearings are provided for the cross slide h, and for the following slides which work
at right angles to the cross slide h.
Fig. 4 is a horizontal side elevation of the slide box, and Figs. 5 and 6 are
respectively plan and side elevation of the release slide w, Figs. 7 and 8 respec-
tively plan and side elevation of the locking slide 9, Figs. 9 and 10 respectively
plan and side elevation of the cocking slide 11.
A slide w termed above and in the Provisional Specification the bottom slide,
but which in the drawings is shewn as the bottom slide but oue, and is hercin-
after termed the release slide, is connected at one end by a link and lever to
the horizontal cross shaft y, which extends to one of the line rails z.
The cross
shaft y carries at this end a lever 1, which may be cam shaped, but as shewn in
the drawings is preferably arranged beneath, so as to be capable of raising a rail
bar 2, hinged or hooked at one end and lying along the inner side of the rail.
The rail bar 2 in one position of the lever 1, projects sufficiently to be caught
by the flanges of the engine wheels, and is thus depressed, and along with it the
lever 1, as the engine wheels pass over the rail bar 2; thereby moving through
the connection just mentioned, the release slide to into such a position as to release
the cross slide, and to allow the before mentioned mechanism to explode or
detonate the cartridge. The end of the cross slide h within the slide box v carries
a stout vertical pin 3, provided with anti-friction rollers, the upper end of which
is guided in a straight slot in the cover of the slide box w, or by a cross bar 4
across the top of the slide box r, the said slot or bar being parallel to the motion
of the cross slide h. The release slide wo is formed with a rectangular notch 5,
which has one of its exterior corners slightly rounded. When the vertical pin 3
is to oue (the right) side of this notch 5, the cross slide is thereby held back,
and the before mentioned spring being held compressed, or the hammer lever
raised; but when the release slide wis moved in the direction indicated by the
arrow Fig. 5, by the engine wheel depressing the before mentioned rail bar 2,
the notch 5 is opposite the vertical pin 3, so that the hammer mechanism described
is free to act to fire the cartridge, and push back the cross slide h. The release
slide w is further provided with two lugs or projections 6 and 7, of which the
one 6 on its upper surface serves to catch against the pin or projection 8 attached
to and depending from the top or locking slide 9, Fig. 8; and the other 7 on the
under side of the release slide we serves to catch against a similar projection 10ª
on the upper side of the cocking slide 11, Figs. 9 and 10, heretofore termed the
middle slide, but which as shown in the drawings forms the bottom slide,

page_text: The lug 10 on the upper side of the cocking slide 11 comes in contact with the
lower ends of pins 12 and 13 secured in the signal slides 14 and 15 respectively.
The cocking slide 11 is further formed with a notch, one of the sides 16 of which
is inclined as shewn in Fig. 9, so as to serve as a cam, which on coming in
contact with the vertical pin 3 in the cross slide h, pushes back the cross slide 4,
and cocks the hammer lever 7. The cocking slide 11 is connected at the left of
Fig. 2 by means of rods or wires with an operating lever or crane in the signal
cabin, and at the other end with a weight lever 17, to bring the slide back to its
original position.
Between the release slide wo and the locking slide 9 are located the narrow
signal slides 14 and 15, see Figs. 3, 11 and 12, which are connected to the levers
operating the home and distant signals respectively. Each of these slides carries
a vertical pin (12 and 13), which projects both upwards and downwards.
In the case of a one armed post, these signal slides are unnecessary, and are
dispensed with the top locking slide 9 in this case being connected to the signal
lever.
The locking slide 9 is provided with a depending lug or pin 8, which passes
downwards past the signal slides, so as to come in line with the lug 0 on the
upper side of the release slide w, and has two short longitudinal slots 18 and 19,
placed side by side, and through which the upper ends of the pins (12 and 13)
respectively pass. Towards one end and between the two slots, is pivotted a
quadrant 20, so that a movement of one of the signal slides can take place without
moving the locking slide 9. but if afterwards the second signal slide is moved, or
both signal slides are moved together, the locking slide 9 is compelled to partake
of the movement. By means of the depending pin 8, this movement of the lock-
ing slide is imparted to the release slide te, which depresses the lever 1, and allows
the rail bar 2 to fall below the level of contact with the engine wheel, and would
free the cross slide hand hammer mechanism, but for the interposition of the
angular part 21, projecting in the notch 22 of the top slide 9: which part 21 is
by this movement brought in front of the vertical pin 3 of the cross slide h.
In the working of the apparatus, the first manipulation is to pull the operating
lever or crane, and thus move the cocking slide 11 in the direction indicated by
the arrow in Figs. 2 and 9, so as to force back the cross slide 7 and cock the
hammer lever 1. The latter part of this movement of the cocking slide 11
moves the release slide wo, (the lug 10 catching against the lug 7), so as to raise
the lever 1, and elevate the rail bar 2, and at the same time brings the rectangular
notch 5 of the release slide 10 just past the vertical pin 3 of the cross slide h. The
latter part of this movement moves the locking slide 9 slightly, (the lug 6 catch-
ing against the lug 8), so that the vertical pin 3 is just opposite the gap of the
notch in the slide 9.
With the slides in these positions, the operating lever or crane in the cabin
can be released, and the cocking slide 11 is drawn back by the weight 17 leaving
the release slide w free to move and the hammer mechanism cocked, the rail bar 2
corresponding to the trigger, and the hammer lever I corresponding to the hammer
of the rifle. Both signal slides are at the same time in position corresponding
to the signals being on, that is against a train; in which position the vertical
pins are in position in the slots 18 and 19 as shewn in Fig. 7. If now the home
signal is lowered to accept a train, the movement of the corresponding signal
slide 14 (and pin 12 in the slot 18) merely moves the quadrant 20 to one side, into the
position shewn in Fig. 7, and the detonator would still be fired if a train passed
over a rail bar 2, moving the release slide w. If however before the train reaches
the distant sigual, this is lowered to accept a train, the movement of the corre-
sponding signal slide 15 (and pin 13 in the slot 19, owing to the quadrant 20 being
locked, by the pin 12 being in the position in the slot 18 indicated by a a in
Fig. 7) moves forward the locking slide 9 and the projecting part 21 of the
same, and locks the pin 3 of the cross slide, preventing the firing of the cartridge.
The locking bar 9 thus locks or holds the firing pin out of action, until it is

page_text: moved back by the movements of the operating lever or crane and the release
and cocking slides to and 11, so that a cartridge can only be fired by the depression
of the rail bar 2 caused by a train passing over it.
A fog trumpet 22 can be connected to the apparatus, so as to direct the sound
towards the driver; and the apparatus is suitably cased or boxed in to protect it
from the weather.
It will be evident that this apparatus can be adopted with other signalling
arrangements, besides those more especially referred to.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
:-
1. In fog signalling apparatus for use on railways the combination of a cartridge
wheel mounted on a shaft and intermittently rotated by means of a ratchet wheel
on said shaft and a rocking lever and pawl with hammer mechanism and a move-
able cross slide the latter actuated in the one direction by a pull from the signal
cabin thereby cocking the hammer or firing mechanism and when released actuated
in the opposite direction by gravity or a spring to cause the lammer or firing
mechanism to fire a cartridge substantially as set forth.
2. In fog signalling apparatus for use on railways the combination of a cock-
ing slide moved in one direction by a pull from the cabin and in the opposite
direction by a spring or weight a releasing slide actuated in the releasing direc-
tion by the passing of a train over a connection and in the opposite direction by
engagement with the cocking slide a locking slide and signal slides connected
with mechanism or connections operating the signals and controlling or actuating
the movement of the locking slide substantially as and for the purpose or pur-
poses herein set forth.
3. In fog signalling apparatus for use on railways the combination of a cocking
slide moved in one direction by a pull from the cabin and in the opposite direction
by a spring or weight a releasing slide actuated in the releasing direction by the
passing of a train over a connection and a locking slide connected with the
mechanism or connections operating the signal substantially as and for the
purpose or purposes herein set forth.
4. The arrangement construction and combination of cocking slide release slide
locking slide and signal slides substantially as herein set forth and illustrated in
the accompanying drawings.
e
5. The arrangement construction and combination of cartridge wheel a ratchet
wheels cand o rocking lever and pawls and e¹ and cross slide h substantially
as herein set forth and illustrated.
6. The combination with the subject matter of Claim 5' of spring firing
mechanism substantially as set forth.
7. The combination of cocking release locking and signal slides rail bar con-
nections and cross slide with cartridge wheel and firing mechanism substantially
as herein set forth and illustrated in the accompanying drawings.
8. In connection with the use of engaging or interlocking slides for fog signal-
ling apparatus, the device of a pivotted quadrant 20, slots 18 and 19 in the slide
to which the quadrant is pivotted and pins 12 and 13 connected to the home and
distant signal slides and projecting through said slots 18 and 19 respectively for
the purpose of operating and controlling the fog signalling from the home and
distant signal connections substantially as set forth.
9. The arrangement and construction of fog signalling apparatus substantially
as herein set forth and illustrated in the accompanying drawings.
Dated this 4th Aave of T1 1900
J. CLARK JEFFERSON,
30, Park Row, Leeds, Agent for Applicants.