IMPROVEMENTS IN ROLLERS, DRUMS, AND SHEAVES FOR WAGON WAYS AND OTHER PURPOSES
Year: 1876

page_text: LETTERS PATENT to Henry Lawrence, of the Grange Iron Works, in the County
of Durham, for the Invention of "IMPROVEMENTS IN ROLLERS, DRUMS, AND
SHEAVES FOR WAGON WAYS AND OTHER PURPOSES."
Sealed the 4th August 1876, and dated the 7th February 187
PROVISIONAL SPECIFICATION left by the said Henry Lawrence at the Office
of the Commissioners of Patents on the 7th February 1876.
"IM-
HENRY LAWRENCE, of the Grange Iron Works, in the County of Durham.
PROVEMENTS IN ROLLERS, DRUMS, AND SHEAVES FOR WAGON WAYS AND OTHER
PURPOSES."
My Invention relates more particularly to the rollers, drums, and sheaves which
are used for under ground wagon ways, tramways, inclined planes and other ways
where wagons or other vehicles are hauled by wire ropes. These rollers, drums,
and sheaves when inade of cast iron are rapidly cut through by the ropes and have
to be replaced by others. Now as the only portion subjected to much wear is the
barrel part of the rollers and drums and the rim of the sheaves, I make the ends
and the barrel of the rollers and drums separately, so that the barrel may be of
chilled cast iron, or cast steel, while the ends may be of good cast iron as usual, or
they may of malleable iron. I also make the rims of the sheaves separate from
the arms or interior, so that the rim can be made of chilled cast iron or cast steel,
and the arms or interior of cast or wrought iron.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Lawrence in the Great Seal Patent Office on the 4th August
1870.
HENRY LAWRENCE, of the Grange Iron Works, in the County of Durham. " IM-
PROVEMENTS IN ROLLERS, DRUMS, AND SHEAVES FOR WAGON WAYS AND OTHER
PURPOSES."
My said Invention has for its object improvements in the construction of rollers,
drums, and sheaves, for wagon ways, tramways, inclined planes, and other purposes,

page_text: but it relates more particularly to those rollers, drums, and sheaves, which support
and guide iron or steel ropes when transmitting power from hauling engines,
drawing trains of coal, stone, &c., in mines or otherwise. These rollers, drums,
and sheaves when made of ordinary cast iron are often very rapidly cut by the
ropes making grooves in them, destroying the rope and the roller or drum. Now
according to my Invention, I make the ends of the rollers and drums separate from
the barrel. While these ends can be made of wrought or cast iron, I make the
barrel (which by this construction becomes a plain cylinder) of chilled cast iron
perfectly true by being cast in chills bored out and turned, the surface of the barrel
thus becomes so hard that it is not liable to be cut by the rope, and should the
barrel be broken or worn out a new barrel can be readily attached to the same
ends, instead of the whole roller or drum having to be condemned to the scrap
heap as hitherto. In lieu of making the barrel of chilled cast iron as above
mentioned it can be made of steel or other material. I make the sheaves in a
similar manner, that is to say, the grooved rim is made separate from the arms or
interior; I can thus make the grooved rim of chilled cast iron where the rope
runs on, or of cast steel, and the arms or interior of ordinary cast iron or other
suitable material.
The accompanying Drawings will serve as an illustration of the mode of carrying
the Invention into effect.
Figure 1 is a view of a drum half in section; A is the barrel made separate
from the ends B, B.
Figure 2 is a view of one of the loose ends.
Figure 3 is a view of a roller half in section; A is the barrel separate from the
ends B, B.
Figure 4 is a view of one of the loose ends. The barrel A and ends B of the
rollers and drums are held together by the axle having a cotter through it, or by a
nut on it, or otherwise; and where the drums or rollers are required to run loose
on their axle the ends and barrel can be held together by a steel bush or tube
rivetted at the ends or otherwise.
Figures 5 and 6 are views of a small sheave with the grooved rim of chilled
cast iron at the black part, marked C, and made separate from the interior.
Figures 7 and 8 are views of a larger sheave with the grooved rim of chilled
cast iron at tho part marked C and made separate from the arms.
And having now described the nature of any said Invention, and in what
manner the same is to be performed, I declare that I claim,--
First. Constructing rollers and drums for wagan ways, tramways, and other
purposes, with their barrels and ends in separate pieces substantially as herein-
before described, so that any separate part may be renewed.
Second. Making the barrels of drums or rollers, for wagon ways, tramways, and
other purposes, of chilled cast iron or steel, and the ends of ordinary cast iron or
other materials as herein-before described.
Third. Making the grooved rims of sheaves for wagon ways, trainways, and
other purposes, of chilled cast iron, where the rope comes in contact with it, or cf
steel, and the interior or arms of a different material, as herein-before described.
In witness whereof, I, the said Henry Lawrence have hereunto set my hand
and seal, this Fourth day of August, One thousand eight hundred and
Seventy-six
HENRY LAWRENCE. (L.S.)