IMPROVEMENTS IN APPARATUS FOR GRINDING THE CARDS AND CARD ROLLERS EMPLOYED IN CARDING ENGINES, PARTLY APPLICABLE IN THE CONSTRUCTION OF APPARATUS FOR EXHAUSTING AND FORCING AIR OR OTHER FLUIDS
Year: 1875

page_text: LETTERS PATENT to Joseph Standring Dronsfield, of the Firm of
C
Dronsfield Brothers, of Oldham, in the County of Lancaster,
Machinists, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
GRINDING THE CARDS AND CARD ROLLERS EMPLOYED IN CARDING ENGINES,
PARTLY APPLICABLE IN THE CONSTRUCTION OF APPARATUS FOR EXHAUSTING AND
FORCING AIR OR OTHER FLUIDS."
Sealed the 14th September 1875, and dated the 20th March 1875.
PROVISIONAL SPECIFICATION left by the said Joseph Standring
Dronsfield at the Office of the Commissioners of Patents, with his
Petition, on the 20th March 1875.
I, JOSEPH STANDRING DRONSFIELD, of the Firm of Dronsfield Brothers,
of Oldham, in the County of Lancaster, Machinists, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR
GRINDING THE CARDS AND CARD ROLLERS EMPLOYED IN CARDING ENGINES, PARTLY
APPLICABLE IN THE CONSTRUCTION OF APPARATUS FOR EXHAUSTING AND FORCING
AIR OR OTHER FLUIDS," to be as follows:-
My Invention relates principally to the apparatus in which cards or,

page_text: card rollers are subjected to the action of a revolving grinding roller,
and in which a fan is employed to withdraw the dust arising from the
grinding operation, and to discharge the said dust into a pipe or conduit
which conveys it to any desired point, and the object of my said In-
vention is principally to facilitate the removal of the said dust, and to
improve the action of the withdrawing apparatus.
In the apparatus as at present constructed the exhausting fan is
attached to a frame which is covered with sheet iron. I now form the
said frame entirely of cast iron, and I slope the portions of the surface
thereof from the ends towards the inlet openings to the fan, and also
from the sides to the said openings. I am thus enabled to obtain a more
equal distribution of the draught, and thereby a better effect, and the
improved form of the said cast-iron frame adds considerably to the
strength of the framing.
When constructing the fan I cast two sets of arms, each set being
formed with a boss and with a ring, which connects the outer ends of
the said arms and constitutes one shroud of the fan. The two parts are
connected together by means of the blades, which are preferably curved,
and are screwed or bolted to the said arms and to projections from the
inner sides of the said rings. This method of construction is also
applicable in the formation of fans designed to be employed otherwise
than in connection with card grinding apparatus.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Standring Dronsfield in the Great Seal
Patent Office on the 20th September 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
STANDRING DRONSFIELD, of the Firm of Dronsfield Brothers, of Oldham,
in the County of Lancaster, Machinists, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of March, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Joseph Standring Dronsfield,
1

page_text: Her special license that I, the said Joseph Standring Dronsfield, my
executors, administrators, and assigns, or such others as I, the said
Joseph Standring Dronsfield, 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 law-
fully might make, usc, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN APPARATUS FOR GRINDING THE CARDS AND CARD
ROLLERS EMPLOYED IN CARDING ENGINES, PARTLY APPLICABLE IN THE CONSTRUCTION
OF APPARATUS FOR EXHAUSTING AND FORCING AIR AND OTHER FLUIDS," upon the
condition (amongst others) that I, the said Joseph Standring Dronsfield,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and scals, should particularly 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 Joseph Standring Dronsfield, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement and accompanying Drawings, that is
to say :-
My Invention relates principally to the apparatus in which cards or
card rollers are subjected to the action of a revolving grinding roller,
and in which a fan is employed to withdraw the dust arising from the
grinding operation, and to discharge the said dust into a pipe or conduit
which conveys it to any desired point, and the object of my said In-
vention is principally to facilitate the removal of the said dust and to
improve the action of the withdrawing apparatus.
In the apparatus as at present constructed the exhausting fan is
attached to a frame which is covered with sheet iron. I now form the
said frame entirely of cast iron, and I slope the portions of the surface
thereof from the ends towards the inlet openings to the fan, and also
from the sides to the said openings. I am thus enabled to obtain a more
equal distribution of the draught, and thereby a better effect, and the
improved form of the said cast-iron frame adds considerably to the
strength of the framing.

page_text: When constructing the fan I cast two sets of arms, each set being
formed with a boss and with a ring, which connects the outer ends of
the said arms and constitutes one spheroid of the fan. The two parts are
connected together by means of the blades, which are preferably curved,
and are screwed or bolted to the said arms and to projections from the
inner sides of the said rings. This method of construction is also:
applicable in the formation of fans designed to be employed otherwise
than in connection with card grinding apparatus.
DrONSJETA 8 Impis, in Apparatus for Grinding Cards and Card Rollers..
When constructing the fan I cast two sets of arms, each set being
formed with a boss and with a ring, which connects the outer ends of
the said arms and constitutes one spheroid of the fan. The two parts are
connected together by means of the blades, which are preferably curved,
and are screwed or bolted to the said arms and to projections from the
inner sides of the said rings. This method of construction is also:
applicable in the formation of fans designed to be employed otherwise
than in connection with card grinding apparatus.
And in order that my said Invention may be fully understood, I have
appended hereunto a Sheet of Drawings marked with letters of reference, 1
to which Drawings I will now refer.
Fig. 1 represents a cross sectional clevation, and Fig. 2 a longitudinal
elevation of one of the improved grinding machines, both Figures being
drawn about one-sixth of the full size.
Figures 3 and 4, drawn to a larger scale, represent two sections of the 1
said exhausting fan, taken at right angles the one to the other.
In the said Figs. A is a trough-like casting, which I substitute
for the cast-iron frame covered with sheet iron, as aforesaid, and B is
the said exhausting fan. The said part A, which I will call a trough, is
formed in one piece of cast iron, and is secured by cach end to the end 2
frames a, a, and is also connected by means of stays b, b, with the said
end frames. The bottom of the said trough is made to slope from each
end in all directions towards two openings c, c, which communicate
with the said fan, sharp angles and obstructions to the passage of the
dust being avoided as much as is conveniently possible. The depth of 2
the trough is thus the greatest at the openings c, c, and diminishes
towards each end, whereby the draught near the ends is intensified, and
the tendency to a lodgment of dust at such points is lessened. The
fan B is connected with the trough A by means of two side trunks d, d,
which are bolted to the under side of the said trough, the hollow spaces 3
in the said trunk's coinciding with the openings c, c. The casing e of
the fan is formed with projecting rings, which are turned and fitted into
orifices bored in the sides of the trunks d, d. The framing of the fan
consists of two castings, each consisting of an annular shroud f connected
by three arms g, g, with a boss h, by means of which each casting is 3
keyed or secured upon the fan shaft i. The fan is completed by bolting

page_text: sheet iron blades k, k, cut and bent to the proper form to the arms g, g,
of both castings.
In the example the said arms and blades are curved, but if preferred
they may be straight, and the form of the blades may be otherwise
modified and the number of arms g may be varied.
Having now fully set forth and indicated the nature of my said In-
vention, and the manner in which I carry the same into practical effect,
I would in conclusion have it to be distinctly understood that I claim as
secured to me by the herein-before mentioned Letters Patent,-
First. The part A, formed substantially as and for the purpose set
forth and indicated herein-before and by the accompanying Drawings.
Secondly. The fan B, formed and applied substantially as and for the
purpose herein-before set forth and indicated.
And, Lastly. The improved method of constructing fans, substantially
as set forth and indicated herein-before and in Figs. 3 and 4 of the
acompanying Drawings.
In witness whereof, I, the said Joseph Standring Dronsfield, have.
hereunto set my hand and seal, this Seventeenth day of Sep-
tember, in the year of our Lord One thousand eight hundred and
seventy-five.
JOSEPH S. DRONSFIELD. (L.S.)
Signed and sealed by the said
Joseph Standring Dronsfield
in the presence of
EDWARD K. DUTTON,
Agent to the Patentee,
3, Princess Street,
Manchester.