Improvements in Pulleys for the Wires of Railway Signals and Point Bolts and the like.
Year: 1895

page_text: Date of Application, 19th July, 1895
Complete Specification Left, 20th Apr., 1895-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Pulleys for the Wires of Railway Signals and
Point Bolts and the like.
I, ARTHUR GEORGE EVANS, of 116 Palace Chambers, Bridge Street, West-
minster, in the County of Middlesex, Civil Engineer, do hereby declare the nature
of this invention to be as follows:--
My invention relates to improvements in the construction of wire pulleys
employed as supports for wires operating railway signals, point bolts, or any
other apparatus which it is required to operate by wire for railway signalling
purposes.
In my former Specification of Letters Patent No. 3634 of A.D. 1894,
I described and illustrated a moveable pulley provided with pivots or spindles
to revolve along a path. In that Specification I described that the carrier and
bracket were stamped and were of such construction that the carrier itself was
suspended from a bracket.
In my present invention I arrange that for side pulleys, that is to say, pulleys
suitable for the operation of wires along a straight road, the bracket in some cases
be cast in one piece and that the pulley be placed in position by a groove in the
upper side of the elongated slot, on both sides of the carrier. Another modifica-
tion of the side pulley would be, in order to prevent the pulley being jerked out of
its position, to provide a top roller above the wire and a bolt or screw to form
the fulcrum of this top roller and also attach the upper part of the carrier to
the post.
The usual provision as now in use, of providing means, such as lips or projec-
tions, to retain the wire in its position and prevent it getting between the pulley
and the carrier, is made.
For angle pulleys, used for taking the wire round a curve, I arrange a carrier
also in one casting with suitable means for getting the roller into position. This
carrier is suspended by a bracket similar to that now in general use for the same
purpose.
In both cases described, that is, the two modifications of the side pulley and also
in the angle pulley, I arrange that the casting may contain two or three pulleys,
that is to say, a double or treble pulley carrier, the pulleys being placed in
position and acting in the manner described with reference to the single side
pulley.
Dadh: 10th day of T... 1905
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
70 & 71 Palace Chambers, Westminster, London, S. W.,
Agent for the said Applicant.

page_text: 1
Improvements in Pulleys for the Wires of Railway Signals and
Point Bolts and the like.
I, ARTHUR GEORGE EVANS, of 116 Palace Chambers, Bridge Street, West-
minster, in the County of Middlesex, Civil 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 :-
My invention relates to improvements in the construction of wire pulleys
employed as supports for wires operating railway signals, point bolts, or any
other apparatus which it is required to operate by wire for railway signalling
purposes.
In my former Specification of Letters Patent No. 3634 of A.D. 1894,
I described and illustrated a moveable pulley provided with pivots or spindles to
revolve along a path. In that Specification described that the carrier and
bracket were stamped and were of such construction that the carrier itself was
suspended from a bracket.
In my present invention I arrange that for side pulleys, that is to say, pulleys
suitable for the operation of wires along a straight road, the bracket in some cases
be cast in one piece and that the pulley be placed in position by a groove in the
upper side of the elongated slot, on both sides of the carrier. Another modifica-
tion of the side pulley would be, in order to prevent the pulley being jerked out of
its position, to provide a top roller above the wire and a bolt or screw to form
-the fulcrum of this top roller and also attach the upper part of the carrier to
the post.
The usual provision as now in use, of providing means, such as lips or projec-
tions, to retain the wire in its position and prevent it getting between the pulley
and the carrier, is made.
For angle pulleys, used for taking the wire round a curve, I arrange a carrier
also in one casting with suitable means for getting the roller into position. This
carrier is suspended by a bracket similar to that now in general use for the same
purpose.
In both cases described, that is, the two modifications of the side pulley and also
in the angle pulley, I arrange that the casting may contain two or three pulleys,
that is to say, a double or treble pulley carrier, the pulleys being placed in
position and acting in the manner described with reference to the single side
pulley.
In order that my said invention may be better understood and more readily
carried into effect I will describe it with reference to the drawings hereunto
annexed, in which,
Figure 1 is a front view illustrating one form of my invention in which
the bracket is cast in one piece and a top roller inserted above the wire.
Figure 2 is a side view of Figure 1.
Figure 3 is a front view of another form of my invention with the bracket cast
in one piece, but without a top roller."
Figure 4 is a side view of Figure 3.
Figure 5 illustrates another form of my invention, somewhat similar to Figure 1,
but the main pulley is placed in position from the top, vertical recesses being
formed to allow the spindles of the main pulley to pass.
Figure 6 is a side view of Figure 5.
Figure 7 is a front view of the same form of pulley as that illustrated in Figure 5
but with the addition of lips or ears to prevent the wire getting between the pulley
and the carrier.

page_text: Figure 8 is a front view of the same kind of pulley as Figures 5 and 7, but
instead of a top roller a block is inserted covering the top of the carrier.
Figure 9 is a side view of Figure 8.
Figure 10 is a plan of the substituted block in Figure 8.
Figure 11 is a front view of an angle pulley provided with lips or projections to
prevent the wire from getting between the pulley and the carrier.
Figure 12 is a side view of Figure 11.
Figure 13 is another form of side pulley with the bottom enclosed, the pulley
being placed in position from the top. The dotted lines show the addition where
side lips or projections are provided to prevent the wire getting between the pulley
and the carrier.
Figure 14 is a side view of Figure 13.
In all the figures, the main casting supporting the pulley is in one piece.
The same letters refer to the same parts in the several figures of the
drawings
a is the bracket, b the main or large pulley, and c the upper or small pulley.
d is the substitute or equivalent for the top pulley, Figure 8; e, Figures 1 and 3,
are the slots or openings in the bracket enabling the lower pulley to be placed in
position; f, is the slot extending from the top of the bracket to the elongated slot
or path a¹ in Figures 5, 6, 7, 8, 9, 12 and 13, enabling the main pulley 6 to be
placed in position. The pulleys b are provided with spindles 6' which revolve
along paths a'. In all the figures the brackets being in one piece the parts are
more readily fixed and handled. In certain cases a top roller or pulley is provided
which, should the stakes sag or go below the level, reduces friction in the move-
ment of the wire.
In Figures 8 and 9, d being the equivalent of the top pulley in Figures 1 and 5,
completely covers in a portion of the top of the bracket and prevents the wire
from getting between the pulley and the carrier, and also prevents snow or the like
from collecting above the main pulley.
Having now particularly described the nature of my said invention and in what
manner the same is to be performed, I wish it to be understood that I lay no
claim to the ears projecting inwards from the sides of the carrier, as such ears are
well known and have been in use for many years; neither do I claim the principle
of the pulley provided with spindles as described, but what I do claim is :-
1. A pulley carrier formed in one casting closed at the top, substantially as
described and illustrated in the accompanying drawings.
2. A pulley carrier formed in one casting open at the top, substantially as herein
described and illustrated in the accompanying drawings.
3. A pulley carrier formed in one piece open at the top, in combination with a
revolving top pulley, substantially as described with reference to the accompanying
drawings.
4. A pulley carrier formed in one casting open at the top in combination with a
top block, substantially as herein described and as illustrated in Figures 8, 9, and 10
of the accompanying drawings.
5. An angle pulley substantially as described and illustrated in Figures 11, 12, 13
and 14 of the accompanying drawings.
11000
is 20th day of April 1990.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
Agent for the said Applicant.