IMPROVEMENTS IN THE MANUFACTURE OF SIEVES.
Year: 1872

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
-
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF SIEVES.".
A. communication from abroad by Robert Johnson Mann, of
Burlington, Iowa, United States of America.
Sealed the 6th August 1872, and dated the 11th April 1872.
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition,
on the 11th April 1872.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
SIEVES," a communication, to be as follows:-
The objects of my Invention are to cheapen the cost of making sieves
and to increase their durability; and the said Invention consists
partly in clasping the wire sieve cloth by its edge within a fold made
by the upturned lower edge of the metallic sides of the sieve, or of a

page_text: '
metallic band arranged to fit upon or into the said metallic sides so that
the fold may first enclose and secure the sieve cloth from slipping and
afterwards afford means for stretching the wire cloth to a proper degree
of tension by swaging the metal up against the cloth, and thus tighten-
ing the cloth and securing it in a tightened condition.
It also consists in securing the sieve cloth in this manner to a
narrow annular band of sheet metal to be employed in combination with
the annular sheet metal band made deep enough to form the sides of the
sieve, and provided with a rim at the bottom, into which fits the narrow
band bearing the sieve cloth. The said band and its web are placed
within the sieve body from above and pressed down to the proper position,
being easily removeable, and furnishing a means for adjusting to a given
sieve body a netting or wire cloth of any degree of fineness of mesh.
Several cloths are intended to serve as the equipment of a single sieve
body, any one of which may be used.
or
It also consists in forming the fold or clasp enclosing the wire cloth
so that a flat or rounded ledge will extend from the clasp horizontally
inward from the sides toward the centre of the sieve for a short distance
strengthening the fabric, and avoiding the wear of the sieve cloth that
might occur if the vertical raw edge of the upturned fold were allowed
to come in direct contact bearing with the sieve cloth. The sievė body
"sides" must be formed of sheet metal in an annular band of a
flaring shape so that several of them will readily lie together to facilitate
packing for transportation. The upper edge is duly wired in the manner
of common tin ware to increase the strength, and the bottom edge is
turned up all around on the inside by appropriate machinery to form
a gutter, into which the raw edges of the sieve cloth, which has pre-
viously been cut the proper size and of a circular shape are placed. The
whole is then placed in a swaging machine of any suitable kind, and the
lower part of the gutter compressed upon the sieve cloth, securing it
'firmly against withdrawal and holding equally all the ends of the wires.
The swaging machine is next applied to the inner side of the gutter at a
point above, compressing it together, and pressing the upturned metal
out against the band or sides, whereby the cloth of wire is rendered
perfectly tight, and held by a double clasp of the metal fold or gutter.
The inner side of the gutter, or, in other words, the upturned edge, is of
such width that there remains after the formation of the second clasp
sufficicut metal to form a narrow flat band with a rounded edge pro-

page_text: "
jecting toward the centre and resting against the sieve cloth. The same
construction is used when the cloth is attached to a narrow band instead
of directly to the sieve body. If attached to a narrow band the sieve
body is made of a shape to receive the narrow band and its wire cloth
by being furnished at the lower edge with a gutter upon the inside to
receive the lower edge of the band which is passed in from the top.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the. 10th October 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,'
Southampton Buildings, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of April, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Robert Lake, Her special
licence that I, the said William Robert Lake, my executors, admi-
nistrators, and assigns, or such others as I, the said William Robert
Lake, my executors, administrators, and assigns, should at any time
thereafter
agree with, and no others, from time to time and at all times.
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ircland; the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF SIEVES," a communication to me.
from abroad by Robert Johnson Mann, of Burlington, Iowa, United
States of America, upon the condition (amongst others) that I, the said
William Robert Lake, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals,
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 Scal Patent Office within six.
calendar months next and immediately after the date of the said Letters
Datont

page_text: NOW KNOW YE, that I, the said William Robert Lake, 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, reference being had to the accom-
panying Drawing forming a part of this Specification:-
The object of this Invention is to cheapen the cost of making and to
increase the durability of sieves; and the said Invention consists partly
in clasping the wire sieve cloth by its edge within a fold made by the
upturned lower edge of the metallic sides of the sieve, or of a metallic
band arranged to fit upon or into the said metallic sides, so that the fold
may first enclose and secure the sieve cloth from slipping and afterward
afford the means for stretching the wire cloth to a proper degree of
tension by swaging the metal up against the cloth, thus tightening the
cloth and securing it in a tightened condition,
It also consists in securing the sieve cloth in this manner to a narrow
annular band of sheet metal to be employed in combination with tho
annular sheet metal band, made deep enough to form the sides of the
sieve and provided with a rim at the bottom into which fits the narrow
band bearing the sieve cloth. The said band and its web are placed
within the sieve body from above and pressed down to the proper
position, being easily removable, and furnishing the means for adjusting
to a given sieve body a netting or wire cloth of any degree of fineness of
mesh, several cloths being intended to be used as the equipment of a
single sieve body any one of which may be used.
It also consists in so forming the fold or clasp enclosing the wire
cloth that a flat or rounded ledge will extend from the clasp horizon-
tally inward from the sides toward the centre of the sieve for a short
distance, strengthening the fabric and avoiding the wear of the sieve
cloth likely to occur if the vertical raw edge of the upturned fold were
allowed to come in direct contact with the sieve cloth..
DESCRIPTION OF THE DRAWING.
Figure 1 represents a side view of a sieve constructed in accordance
with this Invention. Figure 2 represents a central vertical section of the
same. Figure 3 represents a similar section of a modification of the said
Invention, exhibiting the detachable band supporting the wire cloth and
inserted within the sieve body. Figure 4 is a view of the bottom of the
sieve. Figures 5, 6, and 7 are sectional views of the sieve, showing the

page_text: various stages of the process of securing the wire cloth.
indicate the same parts throughout the Drawing.
Like letters
The sieve body or sides must be formed of sheet metal in an annular
band A of a flaring shape so that several of them may be readily packed
together for transportation. The upper edge a is duly wired in the.
manner of tin utensils generally to strengthen and finish the same.
The bottom edge is turned up all around on the inside to form a gutter,
as shewn in Figure 5; the sieve cloth B is previously cut to a circular
shape of the proper size, and is placed with its edges within this gutter;
a swedging or indenting tool is applied to the whole to clamp the sides.
of the gutter together as at C, Figure 6; this operation secures the ends
of the wire of the sieve cloth all around by clamping them securely,
but the cloth is too slack for practical use, I therefore apply the
swaging tool a second time at a point D above, which strains the web
perfectly tight and leaves the ledge E which forms a rounded edge e for
the cloth to bear upon, moreover it extends a slight distance under the
same, and forms both a support to the web at the edge, and at the same
time a strengthening rib to the sieve body. The wires F are then
strained from four points in the sides to brace the body diagonally to
the mesh of the sieve cloth, which strengthens materially the whole
structure.
In case the sieve cloth is to be made removeable to adjust cloths of
various degrees of fineness to a single body I attach the said cloth to
a narrow hoop in the manner above described, and make the body with
a plain upturned gutter, into which the edge of the hoop bearing the
cloth may be inserted from above, as will be readily understood by
reference to Figure 3 of the Drawing.
Having thus fully described the said Invention as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim,-
First. The metallic sieve substantially as described, having the wire
cloth secured to the body by a double swaging which first secures and
then tightens the said cloth.
Second. The combination of the metallic sieve body having a gutter
turned in and up at its lower edge with the wire cloth secured to
a narrow band by a double swaging, substantially as and for the
purposes specified.

page_text: Third. The combination of the wire cloth B, the sieve body A, and the
ledge E, e, when the said sieve cloth and body are secured together
substantially as specified for the purpose explained.
Fourth. The combination of a metallic sieve body and a wire sieve
cloth secured thereto by swaging, substantially as specified.
In witness whereof, I, the said William Robert Lake, have hereunto
set my hand and seal, this Tenth day of October, in the year of
our Lord One thousand eight hundred and seventy-two,
Witness,
F. MILLION.
WM. ROB. LAKE. (L.S.)