Improvements in Apparatus for Working Inlet and Outlet Signals at Sidings, Junctions, and at Ends of Crossover Roads; also Conflicting Signals on Single Lines.
Year: 1886

page_text: Improvements in Apparatus for Working Inlet and Outlet Signals
at Sidings, Junctions, and at Ends of Crossover Roads; also
Conflicting Signals on Single Lines.
I HENRY OAKDEN FISHER of The Highlands, Llandough near Cardiff Civil
Engineer do hereby declare the nature of this invention to be as follows:-
This Invention has for its object improvements in apparatus for working inlet
and outlet signals at sidings, junctions and at ends of crossover roads, also con-
flicting signals on single lines.
It has been the usual practice to work the points and signals of cross over roads
with three levers viz, one for the points and one for each signal. By the proposed
arrangement the points will be worked as before and both signals will be worked
with one lever.
The normal position of this lever will be near the centre of the quadrant-the
forward movement will work the signal for trains proceeding one way and the
backward movement will operate the signal for trains proceeding in a contrary
direction.
To effect this the connections between the lever and signals are provided with
parts which slide the one past the other when the signal is not required to be
moved but engage when movement is to be given to the signal.
2-
In this way I simplify signalling apparatus by reducing the number of levers
and at the same time I distinguish the siding signal levers from others in the signal
cabin.
1.
"

page_text: Figure 1 is a ground plan and shews the points and inlet and outlet signals of
an ordinary cross over road worked in the customary way from the signalman's
cabin.
Figure 2 is a sectional elevation shewing the mechanical arrangement in the
signal cabin for working these signals.
Figure 3 is a plan of the lower part of the mechanism.
In Figure 1 X is the inlet signal Y is the outlet signal and Z is the cabin from
which they and also the points are worked. In Figure 2 a is the signal lever.
The normal position of the lever a working the signals will be at or near the
centre of the quadrant or floor plate b. The lower part of the lever is connected
by the rod c, with and it actuates the horizontal lever or bar d. The ends of this
bar are provided with eyes or loops e and e¹ and over these are rings or projections f
and on chains g. g¹ which are led away to the signals. The horizontal lever or
bar d is carried by a vertical bracket ; and the latter is provided with ends or
arms k, k, to which are loosely attached the ends of the chains or connections g. 9¹
passing to the signals.

page_text: The working is as follows:-With the lever a in its normal position (as shewn)
both signals are at the "danger" position.
If it is required to use or work the inlet signal X the lever is moved to the
dotted position a¹. In this movement the connecting rod c draws the horizontal
lever d into the dotted position d. The end e¹ engages with the ring f¹ and by
pulling the chain or connection g¹ puts the signal to the "all right" position. The
upper part h¹ of the connection slides up through the end of the bracket k¹. Whilst
these movements are taking place the other end e of the lever d slides or passes
freely down the chain g to the dotted position d' and the chain g is not moved.
If it is required to work the outlet signal Y the lever is moved to the dotted
position as, this moves the horizontal lever d to the position d' and by the end e,
engaging with the ring puts the signal to the "all right" position. The eye or
loop e¹ on the other end of the lever d then slides or passes freely down the chain g¹
to the position d³.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. Connecting the inlet and outlet signals at sidings, and other signals which
have to be worked under similar conditions, so that they may be controlled by a
single lever a, which when both signals are on stands in mid position and which
when moved from this position pulls off one of the signals without affecting the
other substantially as herein described.
2. Apparatus substantially as herein described and represented by the Figures 2
and 3 of the annexed drawings.