IMORARTMENTS IN Å DRA DAMITE PAR MARING INENSIONS OR COPPER AND OTHER
Year: 1867

page_text: LETTERS PATENT to Frederick Walton, of the Old Hall Works, Wolver-
hampton, in the County of Stafford, Manufacturer, for the Invention of
IMORARTMENTS IN Å DRA DAMITE PAR MARING INENSIONS OR COPPER AND OTHER
137
Sealed the 27th September 1867, and dated the 2nd May 1867.
PROVISIONAL SPECIFICATION left by the said Frederick Walton at the
Office of the Commissioners of Patents, with his Petition, on the 2nd
May 1867.
I, FREDERICK WALTON, of the Old Hall Works, Wolverhampton, in the
County of Stafford, Manufacturer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS FOR MAKING INFUSIONS OF COFFEE
AND OTHER INFUSIONS," to be as follows:-
My Invention relates to apparatus for making infusions of coffee and other
infusions in which the infusion is filtered by the raising of a perforated piston
working water-tight in the cylindrical vessel or apparatus; such apparatus are
commonly called Beart's coffee pots.
My Invention consists of the mechanism herein-after explained for raising
the perforated piston in the cylindrical vessel. To the piston is affixed a piston
rod which on one of its edges bas. a series of teeth, which teeth are inclined
from the piston rod downwards. A moveable saddle piece rests across the
top of the vessel, and through a hole in this saddle piece the piston rod passes.
A lever having a shifting fulcrum is connected to the said saddle piece by
means of a projection on the said saddle piece passing through a slot in the
said lever; the inner end of the lever is nearly semicircular in figure, its convex

page_text: side being downwards; the extreme inner end carries a pin, which may be
engaged with the teeth of the piston rod; the free end of the lever is formed
into a handle; by pressing downwards and forwards the free end of the lever
the pin on its inner end is engaged with one of the teeth of the rack, and the
said rack raised, the convex side of the curved end of the lever bearing upon
the saddle piece and sliding thereon, thus changing the fulcrum of the lever
and enabling the end of the lever to take the rectilinear motion of the piston
rod. By raising and drawing back the lever its inner end may again be
engaged in a lower tooth of the piston rod, and by again lowering and
pressing forward the lever the piston may be further raised, and by repeating
the action described the perforated piston may be made to traverse the whole
length of the cylindrical vessel. By the raising of the perforated piston the
infusion of coffee or other substance is made to filter through the perforated
piston into the cylindrical vessel, as is well understood.
By constructing and arranging the mechanism for raising the perforated
piston according to my Invention the said mechanism is much stronger and
simpler than that ordinarily employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Walton in the Great Seal Patent Office on the
28th October 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
WALTON, of the Old Hall Works, Wolverhampton, in the County of Stafford,
Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of May, in the year of our Lord One
thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Frederick Walton, Her special licence that I, the said Frederick
Walton, my executors, administrators, and assigns, or such others as I, the
said Frederick Walton, my executors, administrators, and assigns, should s
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 Irelaud, the Channel Islands, and Isle of Man, an Invention for
." IMPROVEMENTS IN APPARATUS FOR MAKING INFUSIONS OF COFFEE AND OTHER
INFUSIONS," upon the condition (amongst others) that 1, the said Frederick

page_text: Walton, my executors or administrators, by an instrument 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
Seal Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW VE, that I, the said Frederick Walton, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
My Invention relates to apparatus for making infusions of coffee and other
infusions in which the infusion is filtered by the raising of a perforated
piston working water-tight in the cylindrical vessel or apparatus ; ..such
apparatus are commonly called Beart's coffee pots.
My Invention consists of the mechanism berein-after explained for raising
the perforated piston in the cylindrical vessel. To the piston is affixed a
piston rod, which on one of its edges has a series of teeth, which teeth are
inclined from the piston rod downwards. A. moveable saddle. piece resis
across the top of the vessel, and through a hole in this saddle piece the piston
rod passes.
A lever having a shifting fulcrum is connected to the said saddle
piece by means of a projection on the said saddle piece passing through a slot
in the said lever. The inner end of the lever is nearly semicircular in figure,
its convex side being downwards; the extreme inner end carries a pin which
may be engaged with the teeth of the piston rod. The free end of the lever
is formed into a handle; by pressing downwards and forwards the free end
of the lever the pin on its inner end is engaged with one of the teeth of
the rack, and the said rack raised, the convex side of the curved end of the
Jever bearing upon the saddle piece and sliding thereon, thus changing the
fulerm of the lever and enabling the end of the lever to take the rectilinear
motion of the piston rod; by raising and drawing back the lever its inner end
may again be engaged in a lower tooth of the piston rod, and by again lowering
and pressing, forward the lever the piston may be further raised,, and by
repeating the action described the perforated piston may be made to traverse.
the whole length of the cylindrical: vessel; by the raising of the perforated.
piston: the infusion of coffee or other substance is made to filter. through the
perforated piston into the cylindrical vessel, as is well understood.
Having explained the nature of my Invention I will proceed to describe,
with reference to the accompanying Drawing, the manner in which the same
is to be performed.

page_text: Figure 1 represents in elevation, Figure 2 in vertical section, and Figure 3
in elevation, partly in section, a coffee pot, to which mechanism for raising the
perforated piston of the coffee pot constructed according to my Invention is
applied; Figure 4 represents a plan of the perforated piston of the coffee pot ;
Figures 5, 6, 7, and 8 are parts of my Invention, as herein-after explained.
The same letters are employed to indicate the same parts in each Figure of
the Drawing.
a is the cylindrical body of the coffee pot, in which the perforated piston b
works water-tight; to the said piston ba piston rod c is affixed by means
of the cross bar d. The said piston rod c has on one of its edges a series
of teeth marked c³, the said teeth being inclined from the piston down-
wards, and having the shape represented in the Drawing. Across the top of
the coffee pot a a moveable saddle piece e is placed, the said saddle piece
resting on the edges of the coffee pot, and through a hole f* in the saddle
piece the piston rod c passes. The moveable saddle piece e is represented
separately in side elevation in Figure 5 and plan of upper side in Figure 6
of the Drawing; to the said saddle piece e a lever f, f, is connected by means
of a projection g on the said saddle piece e, passing through a slot f³ in the
end of the lever. The lever f, f2, is prevented from being detached from
the saddle piece e by the enlarged top of the projection 9. The lever f, f, is
shown separately in side elevation in Figure 7, and plan in Figure 8; the
said lever f, f, is capable of moving upon the said projection 9 by means of
its slot f³, the said parts constituting a shifting fulcrum for the lever; the
inner and forked end f of the lever f,ƒ³, is nearly semicircular in figure, its
convex side being downwards, as represented in the Drawing, and the free
end of the said lever is made into a handle; at the extreme end of the
forked part of the lever a pin h is fixed, which pin is of a size proper to fit
in the teeth of the piston rod c.
In using the coffee pot provided with my Invention the perforated piston b
is placed at the bottom of the coffee pot a, and the moveable saddle piece e
carrying the lever f, f³, is placed across the top of the coffee pot in the position
represented in Figure 3. The ground coffee and boiling water are introduced
into the coffee pot, the said coffee and water resting on the perforated piston b,
and at the proper time the piston b is raised in the coffee pot a in the following
way The lever f, f', is lifted into the position represented in Figure 3 so as
to engage its pin h with one of the teeth of the piston rod c. By pressing
downwards and forwards the free end or handle f* of the lever the pin h on the
inner forked end f is made to raise the racked piston rod c and piston b in the
coffee pot a. During the raising of the racked piston rod c the under side of

page_text: the curved end f of the lever bears and slides upon the projecting part i of the
saddle piece e, thus changing the fulcrum of the lever, and enabling the end
of the lever to take the rectilinear motion of the piston rod c. By raising and
drawing back the lever f, f', the pin h on its inner end may again be engaged
in a lower tooth of the piston rod c, and by again lowering and pressing for-
ward the lever f, fs, the piston b may be further raised, and so on until the
piston 6 has been brought from the position represented in Figure 2 to that
represented in Figure 3. As the perforated piston 6 is raised the infusion of
coffee is made to filter through the said perforated piston into the coffee pot a
in the usual way. By removing the moveable saddle piece e with its lever f,f²,
from the top of the coffee pot, and also removing the perforated piston 6 from
the coffee pot the filtered coffee is ready for use.
By constructing and arranging the mechanism for raising the perforated
piston according to my Invention the said mechanism is much stronger and
simpler than that ordinarily employed. The mechanism described and repre-
sented may be applied to cylindrical vessels or apparatus used for making
other infusions than that of coffee.
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I wish it to be understood that I do not
limit myself to the precise details herein described and illustrated, as the same
may be varied without departing from the nature of my Invention; but I
claim as my Invention the improvements in apparatus for making infusions of
coffee and other infusions, herein-before described and illustrated in the
accompanying Drawing, that is to say, raising the perforated pistons of the
said apparatus for the purpose of filtering the infusion by means of mechanism
the parts of which are constructed, arranged, and worked substantially in the
manner berein-before described and illustrated.
In witness whereof, I, the said Frederick Walton, have hereunto set my
hand and seal, this Twenty-third day of October, in the year of our
Lord One thousand eight hundred and sixty-seven.
Witness,
BENJAMIN WALFORD,
Wolverhampton.
FREDERICK WALTON. (L.S.)