Improvements in Apparatus for Working Coupled Points of Railways.
Year: 1895

page_text: Date of Application, 26th July, 1895
Complete Specification Left, 22nd Aor., 1896-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Working Coupled Points of
Railways.
I, EDWARD HERBERT STONE, Acting Chief Engineer, East Indian Railway,
Calcutta, British India, do hereby declare the nature of this invention to be as
follows:-
My invention relates to apparatus for working coupled points of railways in such
a manner that inequalities in the movements of the point rails or of the rods
connected to them are compensated, so that both sets of points are brought fully
home to either side. For this purpose I provide preferably about midway between
the two sets of points a quadrant frame consisting of two cheeks between which a
lever is free to move, slots being provided in the cheeks for insertion of a key to
hold the lever in either extreme position.
The one point rod is connected by a link to the lever above its fulcrum, the other
below the fulcrum, these rods passing through guides and being provided with
adjusting screws and nuts. The fulcrum of the lever is not fixed iu position
but can slide some distance in horizontal slots provided in the lower part of
the quadrant frame, taking a position in these slots when both the sets of
points are fully home such as allows for inequalities in the connections or
movements.
Dated this 26th day of July 1895.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Working Coupled Points of
Railways.
I, EDWARD HERBERT STONE, Acting Chief Engineer, East Indian Railway,
Calcutta, British India, 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 :-
My invention relates to apparatus for working coupled points of railways in such
a manner that inequalities in the movements of the point rails or of the rods
connected to them are compensated, both sets of points being simultaneously
brought fully home to either side.
For this purpose, I construct and arrange the point lever and its connections as
I shall describe referring to the accompanying drawings, Fig. 1 being a side
elevation and Fig. 2 a plan.
A is the point lever moveable to and fro between two quadrant cheeks B which
are bolted together and bolted down to sleepers. There are slots in the quadrant
to receive a key C, to hold the lever at either end of its stroke. The fulcrum
pin F of the lever is not fixed in position but can move to and fro in a limited slot
formed in the lower part of the quadrant frame. To a pin on the lever, above the
LD077

page_text: fulcrum F is jointed a link D which is jointed to a sliding rod E, and to a pin on
the lever below the fulcrum is jointed a link D' which is jointed to a sliding rod E¹.
The rods E E are guided in holes formed in the base of the quadrant frame and
in guides G G', and they are continued, by rods H H', connected to them by
adjusting right and left handed screw sockets K K', to the two sets of point rails
respectively. On pulling over the lever A to either side, should there be any
inequality in the movements of the two sets of point rails on their rods, the
fulcrum F can move a little to either hand, the point rails of both sets being moved
home to their respective stock rails.
Obviously, apparatus such as is described above may be applied in working
coupled objects other than points, pairs of these being thus made to complete their
respective strokes by the movement of one lever having its fulcrum to a certain
extent free to play.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
For working simultaneously two sets of railway points, a lever having the point
rods, which are guided, linked to pins on opposite sides of its fulcrum, and having
that fulcrum free to move within certain limits, substantially as and for the purpose
set forth.
Dated this 22nd day of Auril 1806
ABEL & IMRAY,
Agents for the Applicant.