A CERTAIN IMPROVEMENT OR IMPROVE- MENTS IN THE CONSTRUCTION OF CYLENDERS USED IN CARDING ENGINES EMPLOYED FOR CARDING COTTON, WOOL, SILK, AND OTHER FIBROUS MATERIAL
Year: 1836

page_text: TO ALL TO WHOM THESE PRESESENTS SHALL COME, I, JOHN
CRIGHTON, of Manchester, in the County of Lancaster, Machine Maker, send
greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-first day of December, in the seventh year of His
reign, did, for Himself, His heirs and successors, give and grant unto me, the
said John Crighton, His especial licence, full power, sole privilege and autho-
rity, that I, the said John Crighton, my exors, adñors, and assigns, and
such others as I, the said John Crighton, my exors, admors, and assigns,
should at any time agree with, and no others, from time to time and at all
times during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend, within England, Wales, and the Town of
Berwick-upon-Tweed, my Invention of "A CERTAIN IMPROVEMENT OR IMPROVE-
MENTS IN THE CONSTRUCTION OF CYLENDERS USED IN CARDING ENGINES EMPLOYED
FOR CARDING COTTON, WOOL, SILK, AND OTHER FIBROUS MATERIAL;" in which
said Letters Patent is contained a proviso that I, the said John Crighton,
shall cause a particular description of the nature of my said Invention, and in
what manner the same is to be performed, to be inrolled in His Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said in part recited Letters Patent, as in and by the
same, reference being thereunto had, will more fully and at large appear..

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
John Crighton, do hereby declare the nature of my Invention consists in the
construction and adaptation of wrought-iron segments to the cylinders used in
carding engines, in the place of those heretofore constructed of cast iron, as
fully explained and set forth in the Specification of my former Patent, bearing
date the Eighteenth day of March, in the year of our Lord One thousand
eight hundred and twenty-three, by means of which the weight of such
cylender is greatly decreased, and other advantages gained, as will be hereafter
explained, and the manner in which the same is to be performed and carried
into effect will be seen by reference to the annexed Drawing and the following
description thereof :-
The scale to which the Drawing is made is marked thereon, and the same
letters and figures of reference indicate the same parts throughout the whole
of the Drawings.
Fig. 1 represents an end view of the main cylender of a carding engine, as
constructed under my former Patent; Fig. 2, a section of the same; and Fig. 3,
a traverse section. The remaining Figures are views and sections of the
wrought-iron segments in which my improvement or improvements consist:
In Figures 1 and 3, A represents cast-iron rings or hoops supported by arms
and keyed or fixed on the shaft a, a. These rings hoops or being placed at a
suitable distance from each other according to the intended width of the card,
a sheet iron covering a drum is revitted to them, as shewn tinted red
at B, B, B, B, Fig. 2 and 3. Across the surface of this sheet iron covering
B are placed series of sleepers or pieces of wood b, b (as also seen at Figures
2 and 3), which are securely attached to the hoops or rings A by bolts and
nuts, the heads of the nuts being countersunk into the wood b, b, to allow of
turning up when required. In the intermediate space between each sleeper b
are placed the wrought-iron segment C, which is also attached to the sheet
iron drum by means of revits. The whole circumference of the cylender being
thus provided is seen at Fig. 2. It is covered with cement, as described in
the Specification of my former Patent, already referred to; and, lastly, turned
up true in the bearings on which it revolves, leaving a surface as shewn in
part at the line c, c.
I have given the foregoing description of the construction of cylenders for
carding engines for the purpose of rendering the application and utility of my
present Invention better understood, and shall now proceed to describe the
mode of constructing the wrought-iron sedgments, in which my improvement
or improvements consist.

page_text: Fig. 6 represents the top or upper side of one of the segments, as
placed on a cylender, and Figure 7 the reverse or under side of the
same. Fig. 4 is a longitudinal section, and Fig. 5 a traverse section of the
same. In these Figures the part d, d, d, d, which forms the segment, is
constructed of stout sheet iron, in two equal pieces, joining in the middle at
the imaginary line f. f. This segment is forced into the shape best seen at
Fig. 5, by means of a powerful screw press similar to those used for punching
the flange for cart wheels, &c., in which press I am enabled to form them
while the iron is cold. In the interior of each segment, as seen at Fig. 7,
are placed a series of bars marked g, which are revited to the segment
by the two outside revits x, x, while that in the centre passes through the
bar g, and also the sheet iron B, for the purpose of attaching it to the
cylender, as already described. It will also be remarked that the bars g are
of an exact thickness to correspond with the two edges of the segment, and
thereby give it a firm bearing on the sheet iron B, as best seen in section at
Fig. 5. In this form the complete segment is placed on the cylendrical drum
B, B, B, B, in the position shewn at Fig. 2, and covered with cement, as
already described.
Having now described my general construction of such carding cylender, as
I apply my improvement or improvements, together with the construction of
the segments or parts in which my improvement or improvements consist, as
shewn at Figs. 4, 5, 6, and 7, I would remark, that the advantages which
arise from the application of my improvement or improvements are, that the
uniform weight of such parts enables me to balance the cylender with more
accuracy and without the aid of counterweight, which was required in the
construction of cylenders under my former Patent, already referred to, at the
same time that the total weight of the cylender is much decreased, and
the construction is rendered more perfect, inasmuch as the segment punched
cold from plate iron are more uniform and lighter than the cast segment used
under my former Patent for the same purpose.
Now whereas I have in the foregoing description set forth and described
many parts used in my former Patent, already referred to, for the purpose of
rendering the nature of my present improvement or improvements better
understood, I hereby declare that I do not claim any such parts. But what I
do claim as my present Invention of an Improvement or Improvements in the
Construction of Cylenders used in Carding Cotton, Silk, Wool, and other
Fibrous Material, is, the construction and application of a wrought-iron seg-
ment, as herein-before set forth and described at Figures 4, 5, 6, and 7, which

page_text: Invention being, to the best of my knowledge and belief, new and never
before used in that part of His Majesty's Dominions called England, and the
Town of Berwick-upon-Tweed, I do hereby deliver this as my true and faithful
Specificatio of the same.
In witness whereof, I, the said John Crighton, have hereunto set my
hand and seal, the Second day of May, in the year of our Lord
One thousand eight hundred and thirty-seven.
AND BE IT REMEMBERED, that on the Second day of May, in the
year of our Lord 1837, the aforesaid John Crighton came before our
said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according to
the tenor of the Statute made for that purpose.
Inrolled the Seventeenth day of June, in the year of our Lord One
thousand eight hundred and thirty-seven.