IMPROVEMENTS IN REVOLVING FURNACES
Year: 1883

page_text: LETTERS PATENT to Thomas Cook of the firm of Robinson Cooks and
Company of St Helens in the County of Lancaster Engineer for an Invention
of "IMPROVEMENTS IN REVOLVING FURNACES"
PROVISIONAL SPECIFICATION left by the said Thomas Cook at the Office
of the Commissioners of Patents on the 18th September 1883.
THOMAS COOK of the firm of Robinson Cooks and Company of St Helens in the
County of Lancaster, Engineer, "IMPROVEMENTS IN REVOLVING FURNACES
"
My invention relates to the construction of revolving furnaces such as are used
in the manufacture of crude carbonate of soda commonly called black ash, in
burning and drying sulphate of magnesia, in roasting ores, in burning charcoal and
for other purposes and has for its main object to avoid the loosening of the tyres
of the bearing rings by unequal expansion and contraction as between the rings
and tyres which heretofore have been made of cast iron and wrought iron or steel
or from elongation of such tyres.
For this purpose I construct the bearing rings with the tyres in combination
practically in one piece so that the metal is of uniform structure and will expand
and contract at equal rates.
In carrying my invention into practice I under one modification cast the bearing
rings as a whole of steel in one piece and afterwards, when necessary true up in a
lathe. Under a second modification I cast, also in steel, the said bearing rings in
segments and secure them together.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Cook in the Patent Office on the 17th March 1884.
THOMAS COOK of the firm of Robinson Cooks and Company of St Helens in the
County of Lancaster, Engineer, "IMPROVEMENTS IN REVOLVING FURNACES
"
My invention relates to the construction of revolving furnaces such as are used
in the manufacture of crude carbonate of soda commonly called black ash, in
burning and drying sulphate of magnesia, in roasting ores, in burning charcoal and
for other purposes and has for its main object to avoid the loosening of the tyres
of the bearing rings by unequal expansion and contraction as between the rings
and tyres or from the elongation of such tyres, which bearing rings heretofore have
been made of cast iron with wrought iron or steel tyres shrunk upon them.
For this purpose I construct the bearing rings with the tyres in combination
practically in one piece so that the metal is of uniform structure and will expand
and contract at equal rates.
In carrying my invention into practice I under one modification cast the bearing_
rings and tyres as a whole of steel in one piece, and afterwards when necessary
true up in a lathe, Under a second modification I cast also in steel the said
bearing rings and tyres in segments and secure them together.
DESCRIPTION OF THE DRAWINGS
Fig 1 is an elevation of a revolving furnace constructed in accordance with my
invention, fig 2 a side view of the combined bearing ring and tyre, and fig 3 a
transverse section of the said ring and tyre, a body of furnace, 6 neck through
which heated gases and products of combustion enter and leave the furnace,
c bearing ring, d tyre connected thereto by the web e. The bearing ring tyre and
the outlined connecting web are cast of steel in one piece.
Fig 4 is a side view, and fig 5 a transverse view of part of a combined bearing
ring and tyre made in segments bolted or otherwise connected together instead of
being all in one piece, as in figs 1. to 3.
Fig 6 is a side elevation, and fig 7 a transverse section of a further modification
of combined sectional ring and tyre forming part of revolving furnaces under my
invention.
Having now described and ascertained the nature of the said invention in such
manner that others will be enabled to carry my improvements into effect
I claim
Revolving furnaces constructed substantially in the manner and for the purposes
herein set forth.
In Witness Whereof I the said Thomas Cook have hereunto set my hand and
Witness to the signature
of the said Thomas Cook
R. B. BOWER
Book Keeper
St. Helens
THOMAS COOK (L.S.)