Improvements in Pulley Carriers Used in Railway Signalling.
Year: 1895

page_text: Date of Application, 7th May, 1895
Complete Specification Left, 6th Feb., 1896--Accepted, 7th Mar.,
1896
PROVISIONAL SPECIFICATION.
Improvements in Pulley Carriers Used in Railway Signalling.
I, ARTHUR GEORGE EVANS, of 116, Palace Chambers, Bridge Street,
Westminster, in the County of Middlesex, Civil Engineer, do hereby declare the
nature of this invention to be as follows:-
In the Specification of Letters Patent gianted to me, No. 3634 of A.D. 1894,
I described a longitudinally travelling pulley moving in a carrier for supporting
wires for working railway signals, points, or other railway signalling apparatus.
The moveable pulley was below the wire and its chief use is when the wire is
bearing on the pulley, the pulloys being fixed in the same vertical line.
My present invention cousists in arrauging a moveable travelling pulley above the
wire, moving along a path similar to the pulley below the wine. It will be under-
stood that should any of the stakes or supports upon which the carriers are fixed
get below the vertical line, or from any reason the wire leaves the lower pulley it
will move against the upper pulley and the latter being a travelling one friction
will be reduced.
The pulley in my present invention fixed above the wire 18 similar to that used
below with projecting spindles, moving along a horizontal path with closed ends.
Means are provided for preventing the wire getting between either the top or
bottom pulley and the frame or carrier
I am aware that a wire pulley with projecting spindles has been used before as
described in my prior Specification above referred to.
Dated this Seventh day of May 1895.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
Agent for the said Applicant.
COMPLETE SPECIFICATION.
Improvements in Pulley Carriers Used in Railway Signalling.
I, ARTHUR GEORGE EVANS, of 116 Palace Chambers, Bridge Street,
Westminster, 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 :-
In the Specification of Letters Patent granted to me, No. 3634 of A.D. 1894,
I described a longitudinally travelling pulley moving in a cairies for supporting
wires for working railway signals, points, or other railway signalling apparatus.
The movable pulley was below the wire and its chief use 18 when the wire is
bearing on the pulley, the pulleys being fixed in the same vertical line.
My present invention consists in arranging a movable travelling pulley above the
It will be under-
wire, moving along a path similar to the pulley below the wire.
stood that should any of the stakes or supports upon which the carriers are fixed
get below the vertical line, or fiom auy icason the wiro leaves the lower pulley it
will move against the upper pulley and the latter being a travelling oue friction
will be reduced.

page_text: The pulley in my present invention fixed above the wire 13 similar to that used
below with projecting spindles, moving along a horizontal path with closed ends.
Means may be provided, if desirable, for preventing the wire getting between
either the top or bottom pulley and the fame or carrier, but travelling pulley
carriers provided with such ears or projections are not recommended inasmuch as,
unless the line of pulleys is perfectly straight, more friction is created by the wire
bearing on the opposite ears or projections ou the carriers.
I am aware that a wne pulley with projecting spindles has been used before, as
described in my prior Specification above referred to.
In order that my invention may be better understood and more readily carried
uto effect I will describe the drawing hereunto annexed.
Figure Illustrates a front view of my invention with the carrier in two
halves.
Figure 2 is a side view of Figure 1.
Figure 3 illustrates a side view of another form of my invention with the carrior
in one casting, but with a division piece above the top pulley to prevent undue,
pressure being put upon the outside of the fiame when the retaining screw 18
screwed into the post.
Figure 4 18 n side view of Figure 3.
The samo letters refer to the same parts in the several figures.
a, al are the two halves comprising the carrier shown in Figs. 1 and 2; a' is tho
carrier formed in one piece, shown in Figs. 3 and 4; 6 is the longitudinal pathway
or slot for the top pulloy and c the longitudinal pathway on slot for the bottom
pulley (Fig. 1). b and c are the paths for the upper and lower pulleys
respectively in Figures 3 and 4, in these figures there are no slots through the
casting, the outer surface of the bracket being solid. is the top pulley and e the
lower pulley in all the figures, d, are the spindles of the top pulleys and e' e' are
the spindles of the lower pulleys. 7 (Fig 3) 15 a slot or recess in the cartier for
the insertion of the upper pulley, and is a slot or reooss for the insertion of the
lower pulley:
The working of my invention is as follows :-
Should
Assuming the stakes which support the carriers to be level and the pulleys also
each the samo vertical height, the wire on being pulled will move the lower pulleys
Bo that they revolve on their axes along the longitudinal paths or slots c.
the stakes sink or any of the pulleys get at a lower level than the adjacent pulleys
the wire is then practically supporting the pulley carrier and on being pulled will
bear on the top pulley causing the pulley to revolve on its axis on the upper side
of the upper longitudinal path or slot b.
In Figuros 3 and 4 on the upper side of tho upper and lower longitudinal paths
or slots a recess 18 provided and by means of a straight cut on the boss of the
upper pulley it can be inserted into position and removed therefrom without
dismounting the carrier. The lower pulley is also dropped into position through
the slot or recess (h) showu.
I am aware that travelling pulleys carried in a carrier composed of two like
halves have been used before, and I am also aware that travelling wire pulleys them-
selves constructed similar to those illustrated have also been used; I, therefore,
do not claim, per se, the construction of either of these, but what I do claim is :-
1. The combination, with a wire, of pulleys arranged above and below the wire
and a carrier provided with longitudinal ways or paths for the ends of the spindles
of the said pulleys to roll along when the said wiro is actuated, substantially as
Bet forth,
2. In a pulley cartier for wires employed in railway signalling, an elongated
path or slot upon which a movable top pulley is free to travel to and fro, the said
pulley having movement communicated to it by the wire used and employed for
communicating to and fro movements ou railways in connection with railway

page_text: signalling apparatus, the said pulley having spindles or pivots of relatively smaller
diameter, substantially as herein described.
3. In supporting guides for wires employed in railway signalling apparatus
communicating to and fro movements on railways, the combination, with a bottom
pulley provided with spindles or pivots of relatively smaller diameter arranged to
roll either on recessed shelves on the side cheeks of a carrier, or along the lower
sides of elongated slots provided in such carriol, of a top pulley also provided with
apindles or pivots of relatively smaller diameter arranged to roll on recessed shelves
on the side cheeks of the carrier or upon the upper or lower side or path of
elongated slots provided in the said carer, substantially as described, for the
purposes herein set forth and as illustrated in the accompanying drawing.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
70 and 71 Palace Chambers, Westminster, S. W.,
Agent for the said Applicant.