IMPROVE- MENTS IN APPARATUS RELATING TO RAILWAY SWITCHES AND SIGNALS
Year: 1879

page_text: LETTERS PATENT to Charles William Earle Marsh, of the Isca Foundry,
Newport, Monmouthshire, Civil Engineer, for the Invention of "IMPROVE-
MENTS IN APPARATUS RELATING TO RAILWAY SWITCHES AND SIGNALS."
Sealed the 13th February 1880, and dated the 21st October 1879.
PROVISIONAL SPECIFICATION left by the said Charles William Earle Marsh
at the Office of the Commissioners of Patents on the 21st October 1879.
$6
CHARLES WILLIAM EARLE MARSH, of the Isca Foundry, Newport, Monmouth-
shire, Civil Engineer. IMPROVEMENTS IN APPARATUS RELATING TO RAILWAY
SWITCHES AND SIGNALS."
This Invention has for its object improvements in apparatus for working railway
switches and signals.
For this purpose according to my improvements a lever is supported in a bracket,
double eye, or other suitable mechanical arrangement, having a handle and weight
at the top end and a curved slot or two projections only at the other end, and is
supported in the bracket or frame by a fulcrum pin placed between the bandle and
slot or projections at a suitable distance from either, the curve for the slot being an
arc of a radius struck from the fulcrum.
One end or arm of a bell crank is placed in the slot or between the projections
referred to, the other arm being attached to the switch or signal connecting rods.
When in use the switch lever moves parallel with the railway, and travels the
length of the arc or slot; or if projections are. adopted the distance between them
which enables it to move over the centre of gravity before it acts upon the
switches or signals, and thus allows them to be weighted on either side (open or
shut).
The lever may be constructed without the lower bar of the arc, in which case
the two ends of the arc would be allowed to remain to form snugs or tappets to act
upon the crank after the lever had travelled the distance allowed for by the length
of the arc, or the distance between the two tappets.
If preferred, instead of the arc, the bottom or lower end of the lever may be
forked or of other suitable shape, so as to allow it to travel (as described) the
required distance before acting directly, as described, upon the arm of the crank;
or if desired the crank may be formed as the arc or fork in which case the lever.
would act in it similar, only arranged vice versa to the foregoing.
If requisite the arc and crank as described may be placed above the fulcruin of
the lever instead of below it.
;

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Charles William Earle Marsh in the Great Seal Patent Office on the 21st
April 1880.
CHARLES WILLIAM EARLE MARSH, of the Isca Foundry, Newport, Monmouth-
shire, Civil Engineer. "IMPROVEMENTS IN APPARATUS RELATING TO RAILWAY
SWITCHES AND SIGNALS."
This Invention has for its object improvements in apparatus for working railway
switches and signals.
For this purpose according to my improvements a lever is supported in a bracket,
double eye, or other suitable mechanical arrangement, having a handle and weight
at the top end and a curved slot or two projections only at the other end, and is
supported in the bracket or frame by a fulcrum pin placed between the handle and
slot or projections at a suitable distance from either, the curve for the slot being an
are of a radius struck from the fulcrum.
One end or arm of a bell crank. is placed in the slot or between the projections
referred to, the other arm being attached to the switch or signal connecting rods.
When in use the switch lever moves parallel with the railway, and travels the
length of the arc or slot; or if projections are adapted the distance between them
which enables it to move over the centre of gravity before it acts upon the
switches or signals, and thus allows them to be weighted on either side (open or
shut).
The lever may be constructed without the lower bar of the arc, in which case
the two ends of the arc would be allowed to remain to form snugs or tappets to act
upon the crank after the lever had travelled the distance allowed for by the length
of the arc, or the distance between the two tappets.
If preferred, instead of the arc, the bottom or lower end of the lever may be
forked shape, so as to allow it to travel (as described) the required distance before
acting directly, as described, upon the arm of the crank; or if desired the crank
may be formed as the arc or fork, in which case the lever would act in it similar,
only arranged vice versa to the foregoing.
If requisite the arc and crank as described may be placed above the fulcrum of
the lever instead of below it.
And in order that my Invention may be clearly understood and readily
carried into practice I will proceed to describe the Drawings hereto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is an elevation or side view, and Figure 2 is a plan or view looking
down on the apparatus in its complete form. a, a, in these views is a bracket or
frame to support the lever, b being a fulcrum pin upon which the lever works;
c and c, c², c³, is the lever having a handle d and any suitable weight e at the top,
and snugs, projections, or tappets f at the lower end to act upon the bell crank;
g is a bell crank supported by a fulcrum pin h; one arm of the bell crank works
between the lever tappets referred to, and the other is attached to the switch or
signal rods.
.
Figure 3 shows the lever with a slot or curve at the lower end, in which works
the arm of the bell crank g.
'
Figure 4 shows the lever with the lower end forked shape; and Figures 5 and 6
show the bell crank if made to act as the arc, slot, or fork; Figure 7 being a lever,
the lower end k of which would work in or between the arc, slot, fork, or
projections.
Having thus described the nature of my improvements, and the manner of per-

page_text: forming or carrying the same into practice, I would remark that I do not claim any
of the parts separately, which are well known and in common use; but what I
claim is, the improved arrangement and construction of a lever and crank or com-
bined apparatus for actuating a railway switch or signal, substantially in the manner
herein before described and represented in the several Figures of the Drawings
hereto annexed.
In witness whereof, I, the said Charles William Earle Marsh, have hereunto
set my hand and seal, this Fifteenth day of March, in the year of our Lord
One thousand eight hundred and eighty.
C. W. E. MARSH. (L.S.)