IMPROVEMENTS IN THE
Year: 1883

page_text: LETTERS PATENT to John Dania Tomlinson of Rochdale in the County of
Lancaster Machine Maker for an Invention of "IMPROVEMENTS IN THE
PROVISIONAL SPECIFICATION left by the said John Dania Tomlinson at
the Office of the Commissioners of Patents on the 19th January 1883.
JOHN DANIA TOMLINSON of Rochdale in the County of Lancaster Machine
Maker " IMPROVEMENTS IN THE CONSTRUCTION OF CYLINDERS FOR BREAKING-UP
FIBROUS MATERIALS
"
The object of my improvements is to form cylinders for hard waste breakers
combining lightness with rigidity and simplicity with economy in their construction.
Hitherto such cylinders when made of cast iron have been of great weight and
when a wrought iron shell and arm or ends have been used the cylinders lacked
rigidity.
In performing my Invention I form the ends of such cylinders of cast iron or
steel or forged wrought iron these ends are secured to the shaft at the boss as usual.
The shell of the cylinder is formed of a plate of wrought iron or steel (bent in a
cylindrical form) with the edges brought together and riveted or screwed to a plate
on the inside of the cylinder: or one of the edges may be turned in and the other
lapped over it and fastened together by rivets or screws. I make each of the ends
in one piece with arms and form a flange at the periphery to which the shell is
secured: a sheet metal cover is fastened to the shell to keep the fly or dust out of
the cylinder: or the ends may be made solid, of malleable or cast iron or steel and
the cover dispensed with.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Dania Tomlinson in the Great Seal Patent Office on the
18th July 1883.
JOHN DANIA TOMLINSON of Rochdale in the County of Lancaster Machine
Maker. "IMPROVEMENTS IN THE CONSTRUCTION OF CYLINDERS FOR BREAKING-
UP FIBROUS MATERIALS."
TIL

page_text: Hitherto such cylinders when made of cast iron have been of great weight and
when a wrought iron shell and arms or ends have been used the cylinders lacked
rigidity.
In performing my Invention I form the ends of such cylinders of cast iron or
steel or forged wrought iron: these ends are secured to the shaft at the boss as
usual: The shell of the cylinder is formed of a plate of wrought iron or steel (bent
in a cylindrical form) with the edges brought together and rivetted or screwed to a
plate on the inside of the cylinder: or one of the edges may be turned in and the
other lapped over it and fastened together by rivets or screws. I make each of
the ends in one piece with arms and form a flange at the periphery to which the
shell is secured: a sheet metal cover is fastened to the shell to keep fly or dust
out of the cylinder: or the ends may be made solid of malleable or cast iron or steel
and the cover dispensed with.
And in order that my Invention may be fully understood and readily carried
into effect I will proceed to describe the accompanying Sheet of Drawings reference
being had to the figures and letters marked thereon.
.
Fig. 1 is an end elevation and Fig. 2 a view partly in section of a cylinder for
breaking up fibrous materials constructed according to my improvements.
a is the shaft to which are keyed the ends of the cylinder a': these ends are
each formed in one piece of cast iron or steel with arms and a flange a² at the
periphery is the shell of the cylinder made of a plate of wrought iron or steel
(beut in a cylindrical form) with the edges brought together and secured to the
plate b by the rivets b³, see Fig. 2: instead of using a plate one of the edges of the
shell b may be turned in and the other lapped over it and fastened together by
rivets or screws: the shell b is secured to the flanges as hy bolts 3, and an outer
'casing c, in which the teeth c' are set, is fastened to the shell b by bolts c². A sheet
metal cover d is fastened to each end a¹ see Fig. 2 (or it may be fastened to the
shell b) to keep fly or dust out of the cylinder.
The cylinder thus formed is light and at the same time strong while it combines
rigidity with economy in construction.
Having stated the nature of my Invention and described the manner of
performing the same
I declare that I'claim
1. The improvements in the construction of cylinders for breaking up fibrous
materials substantially as herein shown and described.
2. In a cylinder for breaking up fibrous materials the combination of a shell
formed of wrought iron or steel with ends made of cast iron or cast steel substan-
tially as and for the purposes herein shown and described.
In Witness whereof I the said John Dania Tomlinson have hereunto set
iny hand and seal this sixteenth day of July One thousand eight hundred
and eighty three.
JOHN DANIA TOMLINSON (L.S.)