IMPROVEMENTS IN LOCKING APPARATUS FOR RA POINTS
Year: 1884

page_text: I
Centocking Apparatus for Railway Points.
I, AUGUST REINHARD of N° 6 Fell Street, Wood Street in the city of London,
Merchant, do hereby declare the nature of my invention for "IMPROVEMENTS IN
LOCKING APPARATUS FOR RAILWAY POINTS "
to be as follows:-
This invention has reference to locking apparatus for locking railway points in
position so that they cannot be shifted while a train is passing over them, and it
relates to that particular arrangement of such apparatus in which a guard rail is
caused by the motion of the pointsman's lever to rise above the level of the rails,
while at the same time a sliding locking bolt is withdrawn from the cross-bar
connecting the two points, before these can be shifted by the continued motion of
the pointsman's lever.
According to the present invention, these several movements are effected by cam
surfaces acting upon levers that are connected respectively to the guard rail and
locking bolt, and to the points, which cam surfaces may either be formed on
rectilineally sliding bars, or on revolving discs. In the former case, the rod leading
from the pointsman's lever is connected firstly to a lever that actuates a sliding bar
on which are cam surfaces that act on the lever by means of which the guard rail
and locking bolt are moved.
The guard rail is of the ordinary construction, that is to say, arranged to rise
and fall on rocking links at the side of one of the rails and connected by an arm
to a wayshaft, a second arm on which is connected to a sliding bolt which can be
made to pass into the one or other of two holes in a bar connecting the two rails of
the points, so that when the guard rail rises, the sliding bolt is withdrawn leaving
the points free to be shifted, and when the guard rail falls, the bolt is shot so as to
lock the points in position.
The rod from the pointsman's lever is connected secondly to a second sliding bar
on which are cam surfaces that act upon the lever that moves the points, and the
cam surfaces on the two above-mentioned sliding bars are so formed with inclines
and dwells and are so arranged relatively to each other, that at the commencement
of the motion of the pointsman's lever, the first sliding bar is made to act with

page_text: inclines upon the lever actuating the guard rail and locking bolt, so as to raise the
former, and withdraw the latter, and then, on the continued motion of the
pointsmans lever, while the said bar, by means of dwells is holding these parts in
the said position, the second sliding bar is caused by means of inclines to shift over
the points. Lastly, while the second bar is holding the pointsman's lever by means
of dwells, the first bar is caused by the last part of the motion of the pointsman's
lever in the same direction to act upon the lever of the guard rail and locking bolt
so as to lower the former and shoot the latter, thereby locking the points in
position.
On reversing the position of the pointsman's lever for shifting the points back
again, the same movements as above described are repeated in inverse order.
In the modified arrangement, where the cam surfaces are formed on rotating
discs, the mode of operating is the same as above described, the only difference
being that the two cam discs are both mounted upon one and the same shaft
which is partially rotated in one direction by the one motion of the pointsman's
lever, the reverse motion of which partially rotates them in the contrary direction.
The connection between the rod from the pointsman's lever and the cam shaft
for this purpose may be effected either by means of a way shaft to which the said
rod is connected by a lever, and which has two arms connected to a chain or cord
passing round a pulley on the cam shaft, or the latter may carry a toothed wheel
gearing with a sliding rack actuated by the rod from the pointsman's lever.
Dated this 15th day of December 1884.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings, 25
London, W.C.

page_text: Improvements in Locking Apparatus for Railway Points.
I, AUGUST REINHARD of N° 6 Fell Street, Wood Street, in the city of London,
Merchant, 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 has reference to locking apparatus for locking railway points
in position so that they cannot be shifted while a train is passing over them, and
it relates to that particular arrangement of such apparatus in which a guard rail is
caused by the motion of the pointsman's lever to rise above the level of the rails
while at the same time a sliding locking bolt is withdrawn from the crossbar,
connecting the two points, before these can be shifted by the continued motion of;
the pointsman's lever.
;
,
According to the present invention, these several movements are effected by cam
surfaces acting upon levers that are connected respectively to the guard rail and
locking bolt, and to the points, which cam surfaces may either be formed on recti-
lineally sliding bars, or on revolving discs. In the former case, the rod leading.
from the pointsman's lever is connected firstly to a lever that actuates a sliding bar.
on which are cam surfaces that act on the lever by means of which the guard rail
and locking bolt are moved.
The guard rail is of the ordinary construction that is to say, arranged to rise and;
fall on rocking links at the side of one of the rails and connected by an arm to a
wayshaft, a second arm on which is connected to a sliding bolt which can be made;
to pass into the one or other of two holes in a bar connecting the two rails of the
points, so that when the guard rail rises, the sliding bolt is withdrawn, leaving the
points free to be shifted and when the guard rail falls, the bolt is shot so as to lock
the points in position.
The rod from the pointsmans lever is connected secondly to a second sliding bar
on which are cam surfaces, that act upon a lever that moves the points and the cam
surfaces on the two above-mentioned sliding bars are so formed with inclines and
discs and are so arranged relatively to each other that at the commencement of the
motion of the pointsman's lever, the first sliding bar is made to act with inclines.
upon the lever actuating the guard rail and locking bolt so as to raise the former,
and withdraw the latter and then, on the continued motion of the pointsman's
lever, while the said bar by means of dwells is holding these parts in the said
position, the second sliding bar is caused by means of inclines to shift over the
points.
Lastly while the second bar is holding the pointsman's lever by means of dwells,
the first bar is caused by the last part of the motion of the pointsman's lever in.
the same direction to act upon the lever of the guard rail and locking bolt so as to
lower the former and shoot the latter thereby locking the points in position.
On reversing the position of the pointsman's lever for shifting the points back
again, the same movements as above described are repeated in inverse order.
i
In the modified arrangement, where the cam surfaces are formed on rotating
discs the mode of operating, is the same as above described, the only difference.
being that the two cam discs are both mounted upon one and the same shaft which

page_text: is partially rotated in one direction by the one motion of the pointsman's lever,
the reverse motion of which partially rotates them in the contrary direction.
The connection between the rod from the pointsmans lever and the cam shaft for
this purpose may be effected either by means of a wayshaft to which the said rod
is connected by a lever and which has two arms connected to a chain or cord
passing round a pulley on the cam shaft, or the latter may carry a toothed wheel
gearing with a sliding rack actuated by the rod from the pointsman's lever.
Figs. 1 to 12, of the accompanying drawings shew the first herein described
arrangement of locking apparatus in which the cam surfaces are on rectilineally
sliding barselt rot and
Fig. 1 shews a diagram plan of the same, and figs. 2 to 11 shew enlarged details
thereof, and fig. 12 shews a diagram of the various relative positions which the
levers actuating the switch and locking gear are made to, assume by the action of
the sliding cams.
"
た
F
"
The rod G G leading from the pointsman's lever to the sliding cam S that
actuates the points is connected at b to a lever ac which is attached at its free end
to a bar c d carrying cam surfaces that actuate the lever F connected to the guard
rail and locking bolt. The main object of the lever à é is to enable the extent of
motion of the sliding cams actuating the locking gear to be adjusted relatively to
the stroke of the rod Ġ G': The lever F is pivotted at fand is actuated, by the
cam surfaces on the bar cd which are so arranged relatively to those at S that the
end h of the lever first moves to ' 'while the rod G G moves without acting upon
the points, then remains stationary while the continued motion of the rod G G¹
effects the shifting of the points, and then during the further motion of G G in the
same direction, moves back into the position h.
The guard rail D is connected to the lever F by means of the rod hi and may
be of any ordinary construction, being mounted on rocking links so that on having
. a longitudinal motion imparted to it by F it rises and falls parallel with the rails,
as shewn at figs. 5 and 10. The guard rail is connected by one of its links po
figs. 10 and 11, to a transverse shaft o o, having on its inner end a lever o¹g which
is connected to the sliding bolt r facing the rod W connecting the points so that'
according as these are in the one position or the other the bolt r is made, by the
movement of the guard rail to enter one or other of the holes t t¹ in the bar W, and
thus to lock the points in position.
The action of the cam surfaces on the bar c d for effecting the above described
movements will be understood on reference to fig. 3. On the commencement of
the motion of c d in the direction of the arrow, the arms e g of the lever F are
acted upon by the inclined surfaces d' d² and d³ d' so as to move the point h to h¹.
"On the completion of this motion the lever will remain at rest while G G¹ effects
the shifting of the points as the arms e and g will, during that time lie upon the
straight parts de d₁, and d d of the bar c d. By the time the point d³ has arrived
opposite the arm e, the shifting of the points will have been completed, so that by
the further motion of the bar the inclines d³ d and dd, in acting upon the
arms e g, will cause F to move back again from h¹ to h. By the first described
motion of the lever F the guard rail will have been first raised above the rails and
then lowered again, thereby withdrawing the bolt r from the one hole of the rod W,
so that this can shift over with the points; by the last described motion of the
lever the guard rail will be made to perform the same double movement, thereby.
causing the bolt r to enter the other hole in the rod W. On reversing the motion
of the rod G G¹ for shifting the points back again, the above described movements
will be again effected in the reverse order, that is to say, the lever F will first be
moved from to h' by the 'inclines do do and d³ d thereby unlocking the points;
the points will then be shifted, and F will then be moved back to h again by the
inclines d³ d¹ and dd, thereby locking the points again.
↓
$
Fig. 2 shews the arrangement of the sliding cam surface at S with its' lever and
connections for working the points, the action of which relatively to the cam'
surfaces of c d will be readily understood on reference to the diagram fig. 12,
1

page_text: Figs. 6, 7, 8, 9 and 11 shew cross sections taken respectively on lines, V W X Y
and Z on figs. 5, 3, and 10.
Figs. 13 to 18 of the drawings shew the second described arrangement with
rotating cams.
Fig. 13 is a diagram plan of the arrangement and figs. 14 to 18 shew details to
an enlarged scale. In this case the. pointsman's rod G is connected to a lever G¹
whose axis carries a double ended lever a a connected by chains or cords to the
circumference of a grooved disc A, on the axis of which are the two cams B and C,
of which B serves to actuate the lever S that works the points while C actuates
the lever F that works the locking gear.
The relative movements are similar to
those already described, being effected by partially rotating instead of rectilineally
moving cam surfaces acting on rollers.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what I claim in
respect of locking apparatus for railway points is
1. In combination with the pointsman's rod G and cam surfaces formed thereon.
and the secondary rod c d and its cain surfaces the lever S for working the points
and the lever F for working the point bolt and locking bar substantially as herein
described with reference to figs. 1 to 12 inclusive.
2. In combination with the partially rotating cams B and C worked by the
pointsman's rod, the lever S for working the points and the lever F for working
the point bolt and locking bar, substantially as described with reference to figs. 13
to 18 inclusive,