Improved Appliance for Reducing the Number of Working Levers in Interlocking Apparatus for Railway Signalling.
Year: 1896

page_text: Date of Application, 21st July, 1896
Complete Specification Left, 9th Apr., 1897-Accepted, 29th May. 1897
Improved Appliance for Reducing the Number of Working Levers
in Interlocking Apparatus for Railway Signalling.
WILLIAM HENRY ELLIOTT Chief Signal Inspector Great Southern & Western
Railway Thurles Co. Tipperary Ireland do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in railway signalling apparatus, and has
for its object to provide means whereby a number of signals can be worked
individually by one lever.
In carrying the said invention into practice I have slide plates a. attached to
the lever, b, working points: in these plates I have curved slots c: in these curves
are pins d. which actuate slides E. individually transversely to the slides worked
by the point levers b., these slides carry individual hooked rods into connection
with the lever g. or levers appointed to work signals, when the point levers are
worked. To these hooked rods f. are attached the connections to work signals
individually. Off the curved slots c. in the slide plates a I have notches into
which the pins d. actuating the transverse slides go to form interlocking
arrangements: so that when one, or more point levers are worked they interlock,
or unlock each other as required.
In the accompanying drawings I have shewn how I accomplish the object of
my invention:-
Sheet No. 1. Fig. 1. shews plan of arrangements.
a. a. a. are the slide plates.
b. b. b. the point levers, in normal position.
c. c. c. c. c. the curved slots in slide plates a. a. a.
d. d. d d pins actuating transverse slides E. E.
E. E transverse slides.
f.f. hooked rods.
g. g. lever to work siguals.
h. h. h. h. notches into which pins & engage.
J. end of hooked rod f. to which signal connections are attached.
K. K. K. K. are guides for transverse slides E. E¹.
L. L. base plate, and box for interlocking.
Fig. 2. dotted lines a' bbbfg J¹ shews one of the plates a. a. a., levers b. b. b,
lever g, hooked rod f, and J. end of hooked rod f. to which signal connections are
attached pulled over to position when worked.
Fig. 3. shews eud view of Fig. 1.
m. m. cover of interlocking box L. L.
Sheets Nos. 2 & 3. shew enlarged detailed views of Figs. 1 & 3. (Sheet No. 1.)
Fig. 4 is side view of slide plates a.
Dated this 20th dor of July 1896.

page_text: Improved Appliance for Reducing the Number of Working Levers.
in Interlocking Apparatus for Railway Signalling.
I, WILLIAM HENRY ELLIOTT, Chief Signal Inspector, Great Southern &
Western Railway, Thurles, in the County of Tipperary, Ireland, 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 relates to improvements in railway signalling apparatus having
for its object to reduce the number of signal levers in an interlocking apparatus,
so that one such lever can be rendered available for working one sigual or several
signals.
I shall describe apparatus according to my invention referring to the drawings
accompanying my Provisional Specification.
Figure 1 is a plan shewing three point levers and a signal lever,
Figure 2 is a part plan shewing some of these levers in different positions,
Figure 3 is an end view of the apparatus shewn in Figure 1.
The other figures shew parts of the apparatus separately, Figure 4 being a side
view of one of the slotted plates a. On a base L are fitted to slide a number of
plates E, E each guided by slots engaging upwardly projecting pins K to slide
parallel to the row of levers in the frame and each having a transverse slot in
which is fitted to slide a hooked rod f arranged to act on a signal. Below the
plates E E other plates a are arranged to slide transversely to the row of levers,
each of these being jointed to one of the point levers b of which three are shewn
in Figure 1. The plates a have cut in them slots c which are partly straight and
partly curved so as to operate as cams acting on pins d d which project from the
plates E E.
A signal lever g has arranged at its side the several hooked rods fall their hooks
except one being normally clear of the lever. But when one of the point levers b
is pulled over to the position & its curved slots e acting on the pins d or d' cause
two of the plates E E to slide so that the one moves its hooked rod f out of the
path of the signal lever and the other moves its hooked rod finto the path. On
now moving the signal lever g to the position g' the hooked rod which happens
to be in its path is pulled and thus the signal to which this rod is connected is
lowered, the other signals remaining unaffected. Notches h are provided in the
slots of the plates a into which notches enter some of the pins d or d' locking the
point levers when the plates E E are in such positions as to release signals that
would render the moving of the point levers dangerous. In this way the one
lever g can be arranged to work a number of signals, having at its side a number
of the hooked rods any one of which can have its hook brought into the path of
the lever by the movement of the point lever which renders it safe to lower the
signal connected to that particular rod.
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:-
In combination with the point levers of railway point and signal interlocking
apparatus sliding plates jointed to the point levers and having cam slots operating

page_text: other sliding plates which carry sliding rods having hooks adapted to engage a
signal lever, substantially as and for the purpose set forth.
ABEL & IMRAY,
Agents for the Applicant.