Improvements in or Connected with Interlocking Levers for Operating Railway Points and Signals.
Year: 1888

page_text: Date of Application, 19th May. 1889
Complete Specification Left, 19th Feb., 1889
Complete Soecification Accepted, 23rd Mar., 1889
Improvements in or Connected with Interlocking Levers for
Operating Railway Points and Signals.
I, GEORGE EDWARDS, Managing Director of the Railway Signal Company Limited
of Fazakerley, Liverpool in the County of Lancaster, Engineer do hereby declare
the nature of this Invention to be as follows :-
-
My Invention relates to interlocking levers with which what is known as tappet
locking is used and the object of my Invention is to simplify the mechanism to
economize space in the signal cabin, and to obtain a horizontal or approximately
horizontal motion of the tappets so as to obviate the necessity for curved tappets
and further my Invention reduces the wear in the moving parts of the locking
devices. According to my Invention I effect the locking and unlocking of any
number of levers with one set of tappets actuated by the catch rod only instead of
using a duplicate set of tappets for such levers as have to do locking and unlocking:
I employ a rocker with a slot in it in which. works a stud attached to or a projection
from the catch rod and this rocker I connect with the tappets in such a manner
that when the catch handle and main lever handle are grasped the movement of the
catch handle causes the catch rod to move the rocker so as to give through the
tappets connected with it a first motion to the locks after which the stud or projection
travels along the slot and when the catch handle is released the said stud or
projection again operates the rocker in the same direction as before and completes
the operation of the locks.
I may connect the rocker to the tappets by forming on the rocker a depending
arm to which the tappets are connected or I may connect the tappets to a lever arm
which may turn upon the same centre rod as that on which the main levers turn-
and I connect this lever arm by a link to one arm of a bell-crank-lever the other
arm of which is connected by a link with a projection from one end of the rocker'
but these details may be varied provided that provision is made for the catch rod
CD 017

page_text: to move the rocker on its centre when the catch handle is operated so that a first
movement is given to the locks and that after the main lever is moved over the
releasing of the catch handle gives the movement to complete the operation of
the locks.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields,
Agents.
CAR ELE
Improvements in or Connected with Interlocking Levers for
Operating Railway Points and Signals.
1 GEORGE EDWARDS Managing Director of the Railway Signal Company Limited
of Fazakerley Liverpool in the County of Lancaster Engineer 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 :-
I
My Iuvention relates to interlocking levers with which what is known as tappet
locking is used and the object of my Invention is to simplify the mechanism to
economize space in the signal cabin and to obtain a horizontal or approximately
horizontal motion of the tappets so as to obviate the necessity for curved tappets
and further my Invention reduces the wear in the moving parts of the locking
devices. According to my Invention I effect the locking and unlocking of any
number of levers with one set of tappets actuated by the catch rod only instead of
using a duplicate set of tappets for such levers as have to do unlocking. Figure 1
of the accompanying drawing shews an arrangement according to my Invention.
employ a rocker B with a slot I in it in which works a stud H attached to or a
projection from the catch rod F connected to the signal lever M and provided with
a hand piece G as usual. This rocker B is centered at K and is connected with the
tappets E E in such a manner that when the catch handle G and main lever handle
are grasped the movement of the catch handle causes the catch rod to move the
rocker B, so as to give through the tappets connected with it a first motion to the
locks after which the stud or projection H travels along the slot I towards the end N
thereof and when the catch handle G is released the said stud or projection H again
operates the rocker B in the same direction as before and completes the operation of
the locks,

page_text: I may connect the rocker to the tappets by forming on the rocker tlie depending
arm C to which the tappets E are connected as in Figure 1 or I may connect the
tappets as shewn in Figure 2 to a lever arm O which may turn upon the same
centre rod P as that on which the main levers turn and I connect this lever arm o
by a link S to one arm of a bell-crank lever R the other arm of which is connected
by a link S with a projection from one end of the rocker B but these details may
be varied provided that provision is made for the catch rod to move the rocker on
its centre when the catch handle is operated so that a first movement is given to the
locks, and that after the main lever is moved over the releasing of the catch handle
gives the movement to complete the operation of the locks.
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 1
claim is :-
1. The arrangement and combination of parts constituting the apparatus berein-
before described and illustrated in Figure 1 of the accompanying drawings.
2. The arrangement and combination of parts constituting the apparatus herein-
before described and illustrated in Figure 2 of the accompanying drawings.