Improvements connected with Aërial Railways.
Year: 1899

page_text: Improvements connected with Aërial Railways.
1, ERIK JOHAN LJUNGBERG, of Falun, Sweden, Manager, do hereby declare the
nature of this invention to be as follows:-
Usually two ropes are employed for rope-ways, viz., a hauling rope and a
stationary or carrying rope. When heavy loads are transported the stationary
or carrying rope often requires to be renewed, because the upper part of the rope
becomes worn and very soon rusts when exposed to the influence of the atmos-
phere. A rope consisting of a greater or less number of wires twisted together,
very soon loses a great percentage of its strength and finally breaks, because each
wire is on the upper surface of the rope at some point or other, and thus all the
wires are simultaneously worn. A carrying rope, for instance, made of wires
of a thickness of 2 millimetres, may lose half its strength, through being worn
only 1 millimetre on its upper surface.
Now according to this invention in order to obviate this inconvenience, I pro-
vide round bars each composed of so-called compound steel-i.e., hard steel and
soft steel welded together and rolled to form bars of as great length as possible,
which are then carefully welded together end to end. Such bars may be employed
with advantage instead of the usual carrying ropes. Instead of soft steel and
hard steel, iron and steel may be employed; or portions of steel of differing
hardness.
A compound steel bar of this kind may be considered as a rope, the wires of
which have been welded together; and, being manufactured of soft iron and hard
steel, welded together as described, the said bar will constitute a carrying bar
01 welded carrying rope possessing the strength or wearing-resistance of the steel,
combined with the security of the iron-i.e., the rope or bar will have the neces-
sary strength without risk of breaking. Moreover, it possesses the advantages
as compared with wire rope that it is more durable, does not offer such a large
surface to the action of the atmosphere and is consequently less liable to rust,
and that the wear on the upper surface has only a slight influence on its strength
as the wear is to be regarded in relation to the total diameter of the carrying
rope or bar, whereas the wear of an ordinary rope must be viewed in relation to
the diameter of each of its constituent wires. If, for example, a carrying rope
or bar of a diameter of 25 millimetres, manufactured according to this inven-
tion, is worn on its upper surface 1 millimetre, this will correspond to 4% of
the diameter of the bar, whereas an ordinary wire rope composed of wires of a
diameter of 2 millimetres loses 50% of the diameter of each of the carrying wires
when worn 1 millimetre on its upper surface.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.

page_text: I, ERIK JOHAN LJUNGBERG, of Falun, Sweden, Manager, 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:-
-
Usually two ropes are employed for ropeways viz., a hauling rope and a
stationary or carrying rope. When heavy loads are transported the stationary
or carrying rope often requires to be renewed because the upper surface of the
rope becomes worn and very soon rusts when exposed to the action of the atmos-
phere. A rope consisting of a greater or less number of wires twisted together
very soon loses a large percentage of its strength and finally breaks, because each
wire is on the upper surface of the rope at some point or other, and thus all the
wires are worn simultaneously. A carrying rope, made of wires of a thickness
of 2 millimetres, may lose half its strength for instance through being worn only
1 millimetre on its upper surface.
Now according to this invention in order to obviate this inconvenience, I pro-
vide round bars each composed of so-called compound steel-i.e., hard steel and
soft steel welded together and rolled to form bars of as great length as possible,
which are then carefully welded together end to end. Such bars may be employed
with advantage instead of the usual carrying ropes. Instead of soft steel and
hard steel, iron and steel may be employed.
A compound steel bar of this kind may be considered as a rope, the wires of
which have been welded together; and, being manufactured of, for example, soft
iron and hard steel welded together as described, the said bar will constitute a
carrying bar or welded carrying rope possessing the strength of the steel, com-
bined with the toughness of the iron-i.e., the rope or bar will have the neces-
sary strength without risk of breaking. Moreover, it possesses the advantages as
compared with wire rope that it is more durable, does not offer such a large
surface to the action of the atmosphere and is consequently less liable to rust,
and that the wear on the upper surface has only a slight influence on its strength
since the wear is to be regarded in relation to the total diameter or thickness of
the carrying rope or bar, whereas the wear of an ordinary rope must be viewed
in relation to the diameter of each of its constituent wires. If, for example, a
carrying rope or bar of a diameter of 25 millimetres manufactured according to
this invention, is worn on its upper surface 1 millimetre this will correspond to
per cent. of the diameter of the bar, whereas an ordinary wire rope composed of
wires of a diameter of 2 millimetres loses 50 per cent. of the diameter of each
of the carrying wires when worn 1 millimetre on its upper surface.
4
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed I declare that what
I claim is;
-
A stationary or carrying rope or bar for aerial railways, consisting of bars which
are made by welding together and subsequently rolling steel and iron, or portions
of steel of different degrees of hardness, and are then welded together end to end,
substantially as and for the purpose set forth.
n
1000
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.