AN IMPROVEMENT IN RAILWAY POINT AN SIGNAL INTERLOCKING APPARATUS
Year: 1884

page_text: I, CHARLES ADAMS of Brussels in the Kingdom of Belgium, but at present of
No 28 Southampton Buildings in the County of Middlesex, Engineer do hereby
declare the nature of my Invention for AN IMPROVEMENT IN RAILWAY POINT
AN SIGNAL INTERLOCKING APPARATUS to be as follows:-
My Invention relates to apparatus by which a set of railway points and the
signals corresponding therewith are interlocked, the same apparatus serving to
simplify the set of signal levers by suppressing one in each case, and serving also
to indicate the position of the points and to detect failure in their proper
working.
Beside a set of points I place a frame through which two rods are fitted to slide
parallel to the rails, one end of one of these rods being connected to the main line
signal, and one end of the other rod being connected to the branch line signal; the
other ends of the two rods are linked to a sway beam, the middle of which is
connected to the signal lever. Across the two rods slides a bar connected to the
points, and this bar and the two rods have notches in them so arranged that they
operate as follows: Suppose the points are right for the main line, then the cross
bar presents a notch through which the rod connected to the main line signal can
slide, but no notch for the other rod. On now pulling over the signal lever, the
sway beam is moved on the pin of the latter rod as a fulcrum and moves the other
rod giving the main line signal; and this rod passing into the notch of the cross
bar prevents the points from being moved while the signal is displayed. In a
similar manner, when the points are shifted for the branch, the pulling over of the
signal lever gives the branch line signal. The pointsman, by seeing which signal
is given, knows what position the points are in. And, if the points are not home
in either position, he can give neither signal and consequently knows that some of
the point connections are wrong. In order to provide for detection of failure in
either tongue of the point rails, prefer to make the cross bar connected to the
points in duplicate, one connected to each tongue.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: COMPLETE SPECIFICATION.
I, CHARLES ADAMS of Brussels in the Kingdom of Belgium, but at present of
No 28 Southampton Buildings in the County of Middlesex, Engineer, do hereby
declare the nature of my Invention for "AN IMPROVEMENT IN RAILWAY POINT
AND SIGNAL INTERLOCKING APPARATUS " to be particularly described and ascertained
in and by the following statement :-
My Invention relates to apparatus by which a set of railway points and the
signals corresponding therewith are interlocked, the same apparatus serving to
simplify the set of signal levers by suppressing one in each case, and serving also
to indicate the position of the points and to detect failure in their proper
working.
Fig. 1 is a plan of part of a double line of rails at a pair of points with apparatus
according to my Invention applied thereto, Fig. 4 is a longitudinal and Fig. 5 a
transverse section of the apparatus. Beside the points, I place a frame, through
which are fitted to slide parallel to the rails two rods M³ M2 which are respectively
connected by pulls m' m³ to the main line and the branch line signals, and are
strained as shewn by weights. The other ends of the rods M³ M² are linked to
the ends of a sway beam N to the middle of which is attached the pull extending
from the signal lever which is to operate both the main line and the branch line
signals. Across the rods M¹ M³ is fitted to slide a bar K connected to the points.
This bar K and the rods M¹ M³ are notched so as to operate in the following
manner. Suppose the points are right for the main line, then the cross-bar
presents a notch through which the rod connected to the main line signal can slide,
but no notch for the other rod. On now pulling over the signal lever, the sway
beam is moved on the pin of the latter rod as a fulcrum and moves the other rod
giving the main line signal; and this rod passing into the notch of the crossbar
prevents the points from being moved while the signal is displayed. In a similar
manner, when the points are shifted for the branch, the pulling over of the signal
lever gives the branch line signal. The pointsman, by seeing which signal is
given, knows what position the points are in. And, if the points are not home in
either position, he can give neither signal, and consequently knows that some of
the point connections are wrong.
Although I have shewn only one bar K for interlocking the points with the
signal pulls, it is obvious that two parallel bars might be used as described, one
attached to each of the point rails. In some cases, this is to be preferred, as the
apparatus will then serve to detect failure in the movement of either point rail.
Having now particularly described and ascertained the nature of my Invention
and in what manner the same is to be performed, I claim :-
The combination of two notched signal pull rods linked to opposite ends of a
sway beam, the middle of which is linked to a pull worked by one signal lever and
a notched bar attached to a pair of points and crossing the pull rods, arranged and
operating as railway point and signal interlocking apparatus, substantially as
herein described.
Dated thin 17tL
T