IMPROVEMENTS IN APPARATUS FOR PREVENTING THE SLIPPING OF BOXES OR CARRIAGES USED IN WIRE ROFE TRANSPORT."
Year: 1873

page_text: .
· LETTERS PATENT to William Thomas Henney Carrington, Engineer
to the Wire Tramway Company, Limited, 21, Gresham Streot, in
the City of London, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR PREVENTING THE SLIPPING OF BOXES OR CARRIAGES USED IN WIRE ROFE
TRANSPORT."
PROVISIONAL SPECIFICATION left by the said William Thomas Henney
Carrington at the Office of the Commissioners of Patents, with his
Petition, on the 5th February 1873.
I, WILLIAM THOMAS HENNEY CARRINGTON, Engineer to the Wire
Tramway Company, Limited, 21, Gresham Street, in the City of London,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN APPARATUS FOR PREVENTING THE SLIPPING OF BOXES OR CARRIAGES USED IN
WIRE ROPE TRANSPORT," to be as follows:-
This Invention relates to improvements in apparatus for proventing
the slipping of boxes or carriages used in wire rope transport when
ascending or descending steep inclines.

page_text: According to a previous Patent granted to Charles Hodgson, on the
20th day of July in the year 1868 for "Improved Means of and
Apparatus for Transporting Loads," certain apparatus were described
for embracing, nipping, or gripping a wire rope to enable travelling
boxes or carriages to be moved up and down inclines, and follow the
undulations of the ground over which they moved, or to ascend to and
descend from pillars or supports of varying heights for various purposes.
The apparatus there described are blocks with A shaped grooves or
channels in their under sides for gripping the rope, the grip being in
proportion to the weight of the load carried in cach box or carriage.
Now it has since been found in practice that these blocks have not
gripped the ropes sufficiently tight to cusure the boxes ascending steep
inclines.
The purpose of the present Invention is to overcome this disadvantage,
and this is effected by fitting into metal or other frames an elastic body
or bodies such as prepared rubber which is capable of being compressed
by the weight, and thus nip or grip the rope sufficiently for the travel of
the boxes or carriages up or down inclines of any gradient.
The clastic body is preferably moulded with square, hexagonal, or
other shaped faces, the sides being flush and in contact with the side
checks of the framing between which they are held by bolts and nuts,
the bolts also serving as a bearing upon which the clastic body or
bodies can be turned when found necessary to bring fresh portions of it
or them into work. The central portion of the clastic body is of smaller
diameter than the checks or faces, consequently the grip of the rope is
only by the faces which are inclined or chamfered for the purpose. Any
number of these blocks or mouldings of clastic medium can be used in
the same framing, but two are preferred, one of them at each end, and
with a space between to enable the bolt or pin upon which the box or
carriage pendent is free to swivel for ensuring its vertical action at all
times notwithstanding the angle at which the block may be while
travelling

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Thomas Henney Carrington in the Great
Seal Patent Office on the 5th August 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
THOMAS HENNEY CARRINGTON, Engineer to the Wire Tramway
Company, Limited, 21, Gresham Street, in the City of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of February, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Thomas Henney Carrington,
Her special licence that I, the said William Thomas Henney Carrington,
my executors, administrators, and assigns, or such others as I, the said
William Thomas Henney Carrington, my executors, administrators, and
assigns, should at any time agree with, and no others, from time to timo
and at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of Man,
an Invention for "IMPROVEMENTS IN APPARATUS FOR PREVENTING THE SLIPPING
OF BOXES OR CARRIAGES USED IN WIRE ROPE TRANSPORT," upon the condition
(amongst others) that I, the said William Thomas Henney Carrington,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and im-
mediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Thomas Henney Carrington,
do hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, reference being had to the
Drawings hereunto annexed, that is to say :-
This Invention relates to improvements in apparatus for preventing
the slipping of boxes or carriages used in wire rope transport when
ascending or descending steep inclines.

page_text: According to a previous Patent granted to Charles Hodgson, on the
20th day of July in the year 1868 for " Improved Means of and
Apparatus for Transporting Loads," certain apparatus were described for
embracing, nipping, or gripping a wire rope to enable travelling boxes
or carriages to be moved up and down inclines, and follow the i
undulations of the ground over which they moved or to ascend to and
descend from pillars or supports of varying heights for various purposes.
The apparatus there described are blocks with A shaped grooves or
channels in their under sides for gripping the rope, the grip being in
proportion to the weight of the load carried in each box or carriage.
Now it has since been found in practice that these blocks have not
gripped the ropes sufficiently tight to ensure the boxes ascending steep
inclines.
'The purpose of the present Invention is to overcome this disadvantage
and this is effected by fitting into metal or other frames, an elastic body 1
or bodies such as prepared rubber which is capable of being compressed
by the weight, and thus nip or grip the rope sufficiently for the travel of
the boxes or carriages up or down inclines of any gradient.
The elastic body is preferably moulded with square, hexagonal, or
other shaped faces, the sides being flush and in contact with the side!
checks of the framing between which they are held by bolts and nuts,
the bolts also serving as a bearing upon which the clastic body or bodies
can be turned when found necessary to bring fresh portions of it or
them into work. The central portion of the clastic body is in some
cases of smaller diameter than the checks or faces, consequently the grip
of the rope is only by the faces which are inclined or chamfered for the
purpose. Any number of these blocks or mouldings of clastic medium
can be used in the same framing, but two are preferred, one of them at
cach end, and with a space between, so that the bolt or pin upon which
the box or carriage pendent is swivelled ensure the vertical action of
the pendent at all times notwithstanding the angle at which the block
may be while travelling.
The Invention will be well understood by reference to the accompany-
ing Sheet of Drawings in which Figures 1, 2, and 3, show two sectional
views and a plan view of one of my forms of blocks for preventing the
slip of the boxes or carriages when travelling up or down inclines or
gradients on wire ropes.

page_text: a, a, are the two side plates with holes near their ends for the
reception of bolts b, b, which bind the ends firmly, the distance the two
plates are apart being governed by the clastic mediums c, c, which grip
or nip the rope when placed thereon and the intermediate piece ‹ of
hard material placed between them as shown. The clastic medium is
preferably of cured or vulcanized rubber, and in order that the grip of
the rope should be uniform on the sides I chamfer or incline the
faces e, c, towards the centre and leave a space between the inclines to
prevent the top of the rope coming into contact, which lends in somo
atmospheres to bind the rubber to the rope, so that when the block has
to be removed additional labour is required to lift the block clear, the
bite of one body upon the other being unnecessarily great. The rubber
has in this instance four inclined faces on each half portion so that by
loosening the nuts f, f, and separating the parts, the rubber can be
turned round upon the bolts to bring fresh portions or fresh faces for the
bearing, the intermediato piece d being shaped to suit the faces and
prevent them shifting while the load is upon the blocks. This
intermediate picce d is held at the centre transversely, and also the side
plates for the pin or bolt of the pendent arm of the box to fit into and
swivel so that at whatever the angle the rope may be the box or carriage
preserves a horizontal base while the block accomodates itself to the

page_text: described.
I also claim, the special modes or methods of holding the elastic
medium in position in the blocks herein-before set forth and shown.
In witness whereof, I, the said William Thomas Henney Carrington,
have hereunto set my hand and scal, this Fifth day of August,
One thousand eight hundred and seventy-three.