IMPROVEMENTS IN ENGINES OR MACHINES USED FOR PREPARING AND CARDING FIBROUS MATERIALS
Year: 1879

page_text: LETTERS PATENT to William Tatham, of Rochdale, in the County of Lancaster,
Machine Maker, for the Invention of "IMPROVEMENTS IN ENGINES OR MACHINES
USED FOR PREPARING AND CARDING FIBROUS MATERIALS.”
Sealed the 12th December 1879, and dated the 21st June 1879.
PROVISIONAL SPECIFICATION left by the said William Tatham at the
Office of the Commissioners of Patents on the 21st June 1879.
WILLIAM TATHAM, of Rochdale, in the County of Lancaster, Machine Maker.
"IMPROVEMENTS IN ENGINES OR MACHINES USED FOR PREPARING AND CARDING
FIBROUS MATERIALS."
My Invention relates to an improved mode or modes of constructing the
cylinders, doffers, rollers, or clearers of engines or machines for preparing and
carding fibrous materials. The cylindrical surfaces of such preparing and carding
machines have been formed (more especially those of large size) of ribbed cylinders
of cast iron drilled with holes, and plugged with wood to nail the card sheets to,
and such cylinders have also been formed or have been proposed of alternate
segments of wrought or sheet iron and of wood, and the small cylinders or rollers
have also be formed of tubes of wrought iron, but none of these modes of con-
struction are free from objections, as the cast iron cylinders are seldom uniform in
thickness, and owing to defects in casting many have to be rejected, and they are
heavy and liable to split in plugging and from other causes, and require balancing;
and cylinders formed of compound segments of wood and and wrought iron are liablo
to become loose and to get out of truth, and those made of wrought iron tubes have
had to be made thick, to give hold to the plugs, and have thus been too heavy.
It is the object of my Invention to remedy the objections above mentioned, and
to obtain strong, light, true, and rigid cylinders for the card sheets, lags, or filletts
to be secured to, and my Invention consists,-
Firstly. In forming the cylindrical surfaces of carding cylinders, doffers, and
rollers of plates of wrought iron or steel rolled with ribs at suitable intervals, so
that the ribs are solid with the thin part of the sheet which is plain on one side,
and ribbed on the other side. These ribbed sheets are bent into cylindrical form,

page_text: with the ribs on the interior side of the cylinder in a direction parallel with the
axis of the cylinder, and the ends of the sheet or sheets forming the cylinder are
welded, brazed, rivetted, or otherwise secured together, so as to form a solid or
complete wrought iron or steel cylinder which is shrunk or otherwise forced or
fitted and secured on to rings keyed on the shaft forming the axis of the cylinder,
then the cylinder is drilled through the parts forming the ribs and plugged, and
then it is turned or ground up truly cylindrical, and the card sheets are nailed on
to the surface of the wood forming the plugs.
Secondly. My Invention relates to cylinders for opening and preparing fibrous
materials, where lags or plates having teeth placed in them are secured to the
cylinders, and my Invention consists in constructing such cylinders as above
described for cylinders intended to be covered with cards, except that the cylinders
and bars are not drilled for plugs, but for bolts or screws.
Another modification under this bead of my Invention consists in forming
cylinders for this purpose of ribbed sheets formed by rolling wrought iron or steel,
which ribbed slicets are placed upon rings or arms, the bars or ribs being at suitable
distances apart, and passing round the interior surface of the cylinder at a right
angle to its axis.
Those cylinders are turned or ground up true, and are drilled to receive the bolts
or screws which are to secure the lags or plates to the surface of the cylinder.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Tatham in the Great Seal Patent Office on the 20th
December 1879.
WILLIAM TATHAM, of Rochdale, in the County of Lancaster, Machine_Maker.
"IMPROVEMENTS IN ENGINES OR MACHINES USED FOR PREPARING AND CARDING
FIBROUS MATERIALS."
My Invention relates to an improved mode or modes of constructing the cylinders,
doffers, rollers, or clearers of engines or machines for preparing and carding fibrous
materials.
The cylindrical surfaces of such preparing and carding machines have been
formed (more especially those of large size) of ribbed cylinders of cast iron drilled
with holes, and plugged with wood to nail the card sheets to, and such cylinders
have also been formed or have been proposed of alternate segments of wrought or
sheet iron, and of wood, and the small cylinders or rollers have also been formed of
tubes of wrought iron, but none of these modes of construction are free from
objections, as the cast iron cylinders are seldom uniform in thickness, and owing to
defects in casting many have to be rejected, and they are heavy and liable to split
in plugging and from other causes, and cylinders formed of compound segments of
wood and wrought iron are liable to become loose and to get out of truth, and those
made of wrought iron tubes have had to be made thick to give hold to the plugs,
and have thus been too heavy.
It is the object of my Invention to remedy the objections above mentioned, and
to obtain strong, light, true, and rigid cylinders for the card sheets, lags, or filletts to
be secured to, and my Invention consists,-
Firstly. In forming the cylindrical surfaces of carding cylinders, doffers, and
rollers of plates of wrought iron or steel rolled with ribs at suitable intervals, so
that the ribs are solid with the thin part of the sheet which is plain on one side,
and ribbed on the other side.
These ribbed sheets are bent into cylindrical form, with the ribs on the interior
side of the cylinder in a direction by preference parallel with the axis of the
cylinder, and the ends of the sheet or sheets forming the cylinder are welded,
brazed, rivetted, or otherwise secured together, so as to form a solid or complete
wrought iron or steel cylinder, which is shrunk or otherwise forced or fitted and
secured on to rings or arms, and carried by the shaft forming the axis of the
cylinder, and then it is turned or ground up truly cylindrical, and afterwards
drilled through the parts forming the ribs and plugged, and the card sheets are
nailed on to the surface of the wood forming the
plugs.
Secondly. My Invention relates to cylinders for opening and preparing fibrous
materials where lags or plates having teeth placed in them are secured to the
cylinders, and my Invention consists in constructing such cylinders as above
described for cylinders intended to be covered with cards, except that the cylinders
are not drilled for plugs, but for bolts or screws, by which the lags or staves con-
taining the teeth are secured, or they are drilled to receive large teeth, such as
are used in "willowa."
Another modification under this head of my Invention consists in forming
cylinders for this purpose of ribbed sheets formed by rolling wrought iron or steel,
which ribbed sheets are placed upon rings or arms, the bars or ribs being at
suitable distances apart, and passing round the interior surface of the cylinder at
a right angle to its axis.
These cylinders are made sufficiently true by hammering, rolling, turning, or
grinding, and are drilled to receive the teeth or the bolts or screws which are to
secure the lags or plates containing the teeth to the surface of the cylinder.
Fig. 1 is a side view partly in section, and Fig. 2 is a partial end sectional view,
illustrating the mode of carrying out the first part and part of the second part of

page_text: my Invention. a, shaft or axis; a', rings which carry the cylinder, which is formed
of wrought iron or steel rolled with ribs a solid with the cylinder, that are drilled
with holes which are plugged with wood (as is well understood), to which the cards
are nailed.
"
Fig. 3 is a side view partly in section, and Fig. 4 a partial end sectional view,
illustrating the mode of carrying out one modification under the second part of my
Invention.
a, the shaft or axis; a³, rings or arms to carry the cylinder of rolled wrought
iron or steel, having ribs a solid with the cylinder, to which the ordinary wood
lags a³, having teeth, are secured by bolts as shown.
I have now particularly described the nature of my Invention, and the mode of
carrying the same into effect, and claim as my Invention,-
Firstly. Cylinders for carding engines formed of rolled iron or steel plate or
plates, with ribs (a) solid with the cylinder, as hereinbefore described and illus-
trated by Figs. 1 and 2 of the Drawings.
Secondly. Cylinders for opening fibrous material and similar purposes, formed of
rolled iron or steel plate or plates, with ribs (a) solid with the cylinder, as herein-
before described and illustrated by Figs. 3 and 4 of the Drawings.
In witness whereof, I, the said William Tatham, have hereunto set my hand
and seal, this Nineteenth day of December, in the year of our Lord One
thousand eight hundred and seventy nine.