IMPROVE- MENTS IN THE MANUFACTURE OF IRON PULLEYS FOR WINDING FROM COAL PITS, AND OTHER PURPOSES
Year: 1860

page_text: LETTERS PATENT to George Crawshay, of the Gateshead Iron Works, in
the County of Durham, Ironmaster, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF IRON PULLEYS FOR WINDING FROM COAL PITS,
AND OTHER PURPOSES."
Sealed the 12th September 1860, and dated the 22nd March 1860.
PROVISIONAL SPECIFICATION left by the said George Crawshay at the
Office of the Commissioners of Patents, with his Petition, on the 22nd
March 1860.
I, GEORGE CRAWSHAY, of the Gateshead Iron Works, in the County of
Durham, Ironmaster, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF IRON PULLEYS FOR WINDING FROM COAL
PITS. AND OTHER PURPOSES," to be as follows;--
My Invention consists in constructing of wrought iron the rims of that class
of pulleys generally used for winding for coal pits and other purposes, which
rims have hitherto been made of cast iron. These rims may be made either
of iron rolled to a particular section suitable to the purpose required, or the
section thereof may be made up in parts. For this purpose ordinary angle
iron may be used for rims for round ropes, and channel iron for flat ropes, but
the sectional form of the iron may be varied.

page_text: When the section of the rim is made up in parts, the body or barrel thereof
may be formed of flat or square iron, and the flanges or sides secured thereto
by rivets or bolts. The sectional form of this iron may also be varied.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Crawshay in the Great Seal Patent Office on the
21st September 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
CRAWSHAY, of the Gateshead Iron Works, in the County of Durham, Iron-
master, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of March, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-third year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
George Crawshay, Her especial license that I, the said George Crawshay, my
executors, administrators, and assigns, or such others as I, the said George
Crawshay, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE MANUFAC
TURE OF IRON PULLEYS FOR WINDING FROM COAL PITS, AND OTHER PURPOSES," upon
the condition (amongst others) that I, the said George Crawshay, by an
instrument in writing under my hand and seal, should particularly describe and
ascertain the nature of the said Invention, and in what manner the same
is to be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date of
the said Letters Patent.
NOW KNOW YE, that I, the said George Crawshay, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the Drawing hereunto annexed, and to
the letters and figures marked thereon (that is to say):---
My Invention of "Improvements in the Manufacture of Iron Pulleys for
Winding from Coal Pits and other Purposes," consists in constructing the
rims of such pulleys of wrought iron instead of cast iron, of which they have
hitherto been made, the object of the Invention being to construct pulleys of

page_text: light weight but at the same time of greater strength than when the rims are
made of cast iron. These rims may be made either of iron rolled to a par-
ticular section suitable to the purpose required, or the section thereof may be
made up in parts. For this purpose ordinary angle iron may be used for rims
for round ropes, and channel iron for flat ropes, but the sectional form of the
iron may be varied.
When the section of the rim is made up in parts, the body or barrel thereof
may be formed of flat or square iron, and the flanges or sides secured thereto
by rivets or bolts. The sectional form of this iron may also be varied.
Having thus stated the nature of the said Invention, I will proceed to
describe more particularly in what manner the same is to be performed, by
reference to the accompanying Drawing, in which are represented several
modes of carrying the Invention into effect.
DESCRIPTION OF THE DRAWING.
Fig. is a side elevation of a pulley for round ropes; Fig. 2 is a transverso
section of half the pulley to an enlarged scale; Fig. 3 is a transverse section
of a pulley for flat ropes, in which the rim is made up in parts; Fig. 4 is a
similar section of part of a pulley in which the rim is rolled of one piece to
form the section; Figs. 5 and 6 shew other modes of constructing the rim in
parts; Fig. 7 is a section of the rim of a round rope pulley formed in parts,
in which the centre part o, may be made of wood, iron, steel, or other material
as circumstances may require.
The naves or centres of these wheels may be made of cast or wrought iron,
or a combination of both as shewn at Fig. 3, where the spokes are let into
pockets formed in the cast-iron centre piece c, and covered by wrought-iron
rings a, a, and secured by bolts or rivets passing through the whole, or they
may be made as at Fig. 2, in which case the nave is cast upon the spokes in
the same manner as when the rims are made of cast iron of the usual con-
struction.
The rings composing the rims of these pulleys may be bent into their
required diameter over a curved mandril block, or they may be bent by a
machine similar to that in general use for bending the tyres of locomotive
wheels, either in one entire length and welded at the junction of the two ends,
or they may be made in segments and joined together by side plates and rivets
as shewn at Fig. 1, at b, b.
Having thus described the nature of the said Invention and in what
manner the same is to be performed, I do hereby declare that what. I claim
as of my Invention is, the manufacture of pulleys with wrought-iron rims in

page_text: In witness whereof. I. the said George Crawshay, have hereunto set my
hand and seal, the Fifteenth day of September. in the year of our
Lord One thousand eight hundred and sixty.
Witness,
JOHN HOSKING,
of Gateshead.
GEORGE CRAWSHAY. (L.S.)