CERTAIN IMPROVEMENTS IN MACHI- NERY FOR PREPARING COTTON
Year: 1854

page_text: LETTERS PATENT to John Platt, of Oldham, in the County of Lancaster,
Machine Maker, for the Invention of "CERTAIN IMPROVEMENTS IN MACHI-
NERY FOR PREPARING COTTON."
Sealed the 4th July 1854, and dated the 8th April 1854.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Platt in the Great Seal Patent Office on the 6th
October 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
PLATT, of Oldham, in the County of Lancaster, Machine Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of April, in the year of our Lord

page_text: One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Platt, Her special license that I, the said John Platt, my executors,
administrators, and assigns, or such others as I, the said John Platt, 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 CERTAIN IMPROVEMENTS IN MACHINERY FOR PRE-
PARING COTTON," upon the condition (amongst others) that I, the said John
Platt, by an instrument in writing under my hand and seal, should par-
ticularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Platt, do hereby declare the nature
of my said Invention, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement,
that is to say:-
The nature of my Invention consists in the application of centrifugal force
to double presser flyers, such as those known as Hardman's double presser
flyers. Having thus stated the nature of my Invention, I will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 is an elevation of my improved double presser flyer, with part of
the spindle and the spool to which it is applied; Figure 2 is another elevation;
and Figure 3, a plan of the same. The Drawing is made of the full size of the
parts represented. a is a flyer suitable for a roving frame, and b, b, the
pressers, which are made in the ordinary manner; to each presser is attached
the lower end of one of the wires c, which answer the purpose of weights; the
upper ends of these wires are bent, so as to clip round the upper ends of the
flyer legs; d, d, are projections soldered or otherwise fixed to the flyer legs;
these projections are to prevent the pressers moving too far from the spindles,
or, as it is technically called, "flying off." The pressers are shewn in the
positions they occupy when the spool is empty. When motion is given to the
spindle, the centrifugal action of the wires or weights c causes the pressers b to
wind and press the roving, which passes down one of the flyer legs, and through
the eye of one of the pressers in the ordinary manner on to the spool, with a

page_text: pressure proportionate to the weight of the wire c and to the velocity of the
flyer, as is well understood by persons conversant with this class of machinery.
When the bobbin is full, the pressers occupy the positions shewn by dotted
lines in Figure 3; and the relative position of the wire or weight c to the
presser is such, that the roving is wound on the bobbin at a uniform or
nearly uniform pressure throughout. From the foregoing description, it is
apparent that the advantages of the centrifugal presser are combined with those
of the double or Hardman's presser. I wish it to be understood that I do not
limit myself to the peculiar shape of the presser, or of the part thereof by which
the pressure is given, as any of the centrifugal pressers that are or may be in
use will answer the same purpose.
Having described the nature of my Invention, and the manner of performing
the same, I declare that I claim as my Invention, the application and use of
double centrifugal presser flyers, as described.
In witness whereof, I, the said John Platt, have hereunto set my hand
and scal, this Fifth day of October, One thousand eight hundred and
fifty-four
Signed, sealed, and delivered by the within-
named John Platt in the presence of
H. B. BARLOW,
Patent Agent,
Manchester.
JOHN PLATT. (L.S.)