Improvements in and relating to Cable Tramways.
Year: 1892

page_text: Date of Application, 10th Aug., 1892
Complete Specification Left, 10th May, 1893-Accepted, 10th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Cable Tramways.
I WILLIAM NEWBY COLAM of Billiter Buildings, Billiter Street, in the City
and County of London, Civil Engineer, do hereby declare the nature of this.
invention to be as follows:-
My invention relates to a double locking point for use in cable tramways, and it
consists of a device whereby the slot point is operated at the same time as the rail
point and is also locked so that it cannot be displaced.
In a suitable position on each side of the cableway is mounted in suitable
bearings a vertical shaft. On to the top of each shaft is fixed an arm the free end
of which carries a tongue adapted when the shaft is rotated to engage with a
groove and tongue on the underside of the slot point and pull it over, the
engaging faces of the two tongues being so shaped that they interlock when the
point is over. On the lower ends of these shafts are mounted or fixed levers
which are coupled together by a suitable link, the said arms and levers being
so arranged that as one arm is disengaged from the slot point the other one
engages with it and pulls it over to the other side of the slot. To one of these
shafts is fixed an operating lever which is coupled by a suitable rod with a bell-
crank lever to which the operating cord or mechanism is attached. If this
operating mechanism takes the form of a cord or wire, a balance weight or spring
is provided to operate the mechanism in the opposite direction.
The rail point is operated by an arm carried by a vertical shaft mounted in
suitable bearings and carrying at its lower end a lever having a slotted end
embracing the rod connecting the operating bell-crank lever with the operating
arm on the shaft carrying one of the arms controlling the slot point. On suitable
positions on this coupling rod are elastic or spring stops which when the rod is
operated bear against the slotted end of the lever operating the rail point and so
operate the said point at the same time that the slot point is being operated, the
difference in the movement of the said levers being provided for by the position of
the said elastic or spring stops on the coupling rod.
It will be understood that the lengths of the shafts carrying the operating gear
are such as will bring the mechanism at their lower ends well below the bottom of
the cableway.
Dated this 10th 1
0 A
1000
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Cable Tramways.
I, WILLIAM NEWBY COLAM, of Billiter Buildings, Billiter Street, in the City
and County of London, Civil Engineer, do hereby declare the nature of this
0 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 a double locking point for use in cable tramways, and it
consists of a device whereby the slot point is operated at the same time as the rail
point, and is locked so that it cannot be displaced.

page_text: In the accompanying drawings which illustrate how my invention is carried into
practical effect,
Figure 1 Sheet No. 1 is a view in transverse section through part of a cable road
showing the mechanism constituting my invention in elevation, and
Figure 2 Sheet No. 2 is a view of the said mechanism the tram and slot rails
being shown in dotted lines.
Throughout these views similar parts are marked with like letters of reference.
In a suitable position on each side of the cableway X is mounted in suitable
bearings A and A', a vertical shaft B. The bearings A' supporting the top ends
of the shaft. B are preferably formed in one with boxes A' fixed to the slot
rails Y, Y. On to the top of each shaft B is fixed an arm C the free end of which
carries a tongue or flange c adapted to engage either with a tongue d on the under-
side of the slot point D or with the side of the box A2. The two arms C, C, are
so mounted on the shafts B, B, that when the tongue of one is engaged with the
slot point, the other is engaged with the side of the box A as shown by Figure 2.
On the lower ends of the shafts B and B are fixed levers E, E, coupled together
by a rod or link F, to ensure their simultaneous action so that as one arm is
disengaged from the slot point D the other one engages with it and pulls it over to
the other side of the slot. To one of the shafts B is fixed an operating lever G
(preferably formed in one with the lever E) which is coupled by a rod or link H
with a bell-crank lever J to the free end ; of which the operating cord or
mechanism is attached. If this operating mechanism takes the form of a cord
or wire, a balance weight K or spring is provided to operate the mechanism
in the opposite direction, the said cord or wire being guided by one or more
pulleys L.
The rail point M is operated through a pair of arms N and N¹ the former fixed
to the rail point M, and the latter to a vertical shaft O mounted in suitable
bearings P, P, and carrying at its lower end a lever Q the free end of which has a
slot 9 through which a rod or bar H' carried by snugs h, h, on the rod or link H
passes. In suitable positions on the rod or bar H¹ are placed elastic or spring
stops R, R, which when the said rod or link is operated, bear against the
slotted end of the lever operating the rail point M and so operate the said
point at the same time that the slot point D is being operated, the difference in
the movement of the operating levers being overcome by the elasticity of the
stops R, R.
The lengths of the shafts B, B, and O are such as will bring the mechanism at
their lower ends well below the bottom of the cableway, a suitable chamber being
constructed to receive the said gear.
I wish it to be particularly understood that I do not limit myself to the
precise details of construction hereinbefore described and illustrated by the accom-
panying drawings, but that I hold myself at liberty to make such changes and
alterations as fairly fall within the spirit and scope of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The hereinbefore described mechanism for operating, controlling and interlocking
the rail and slot points on cable tramways.
Dated th
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.