AN IMPROVED APPARATUS FOR BEATING OR WHIPPING EGGS, CREAM, AND THE LIKE
Year: 1884

page_text: I WALTER PATRICK GRAFTON, Engineer, care of A. M. and Wm Clark 53 Chancery
Lane in the County of Middlesex do hereby declare the nature of the said invention
for "AN IMPROVED APPARATUS FOR BEATING OR WHIPPING EGGS, CREAM, AND
THE LIKE," to be as follows:-
My invention relates to an improved apparatus for beating or whipping eggs,
cream and other fluid or semi Buid matters and the improvement has for its object
to thoroughly aerate the fluid or semi fluid mass by causing air to be constantly
pumped into and distributed through the mass whereby the operation is rendered
much more rapid and effectual than has been heretofore possible.
The egg beater consists of a cylinder or vessel with a loosely fitting piston worked
up and down therein either directly by hand or by gearing, the piston being pro-
ferably perforated with holes so graduated as to ensure a uniforin distribution of
air through the mass. The improvement whereby the complete neration of the
mass is rendered possible consists essentially in the conbination with the cylinder
and piston of an air inlet and valve opening inwards so as to admit a quantity of
air beneath the piston on the up stroke and prevent the escape of the air otherwise
than through the fluid mass, on the downstroke of the piston. For this purpose
I may make the piston rod tubular and open out beneath the piston and fit the valvo
therein at the lower end or any other suitable point. Or the cylinder may be pro-
vided with an air inlet tube opening into it at the bottom or side and rising above
the level of the contents of the cylinder, in which inlet the valve would be placed
but I prefer the tubular piston rod.
The opening and closing of the valve when combined with a tubular piston rod
may either be due to the difference of pressure above and below the piston, or it
may be combined with a cap or handle by which the piston rod is worked, the
handle being capable of motion on the rod to the extent of the necessary play of
the valve so that the valve will receive a positive motion whereby it will be opened
and closed by the act of working the piston.

page_text: I, WALTER PATRICK. GRAFTON, Engineer, care of A. M and Wm Clark 53 Chancery
Lane in the County of Middlesex, do hereby declare the nature of the said invention
for AN IMPROVED APPARATUS FOR BEATING OR WHIPPING EGGS, CREAM AND THE
LIKE, and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
"
My Invention relates to apparatus for beating or whipping eggs, cream and other
fluid or semi fluid matters, for culinary purposes and the improvement has for its
object to thoroughly aerate the fluid or semi fluid mass by causing air to be con-
stantly pumped into and distributed through the mass whereby the operation of
beating or whipping is much more rapid and effectual than by the means commonly
used for the purpose.
The apparatus consists mainly of a cylindrical or other shaped vessel and a loosely
fitting piston to be worked up and down therein, the piston being preferably per-
forated, and the improvement whereby the rapid and complete aeration of the mass
is effected consists essentially in the combination with the cylinder and piston of
an air inlet, and valve opening inwards so as to admit a quantity of air beneath
the piston at each upstroke and prevent the escape of the air otherwise than
through the fluid mass, at each downstroke of the piston. For this purpose the
piston rod may be tubular and communicate with the space beneath the piston and
have a valve fitted therein at the lower end or any other suitable point; or
the cylinder may be provided with an air inlet tube opening into it at the
bottom or side, in which inlet the valve would be placed but I prefer the tubular
piston rod.
The opening and closing of the valve when combined with a tubular piston rod
may either be due to the difference of pressure above and below the piston, or it
may be combined with a handle by which the piston rod is worked, the handle
being capable of motion on the rod to the extent of the necessary play of the valve
so that the valve will receive a positive motion whereby it will be opened and closed
by the act of working the piston.
In order that my invention may be more readily understood I have illustrated
it in the accompanying drawings forming part of this Specification and will proceed
to describe it with reference thereto.
Figure 1 is an elevation partly in section of an egg beater having the valve in
the bottom of a hollow piston rod. Figure 2 is a plan showing the perforations in
the piston. Figure 3 is a sectional elevation (drawn to a larger scale) of a hollow
piston rod having the valve at top the valve being actuated directly by the
motion of the hand. Figure 4 is an elevation partly in section and figure 5 a plan
of an egg beater having the valve in the bottom of the vessel. Figure 6 is a detail

page_text: sectional view of the valve and seating drawn to a larger scale. Figure 7 is a
sectional elevation of an apparatus similar to that shown in figure 1 as constructed
for large sizes. Figure 8 is a horizontal section of the same on line 1-1 figure 7.
Figures 9 and 10 show part sectional clevations of various arrangements of
hollow piston rod and valve, suitable for the large sizes of the apparatus.
The same letters of reference indicate similar parts in all the figures.
Referring to figures 1 and 2 a is a cylindrical vessel open at top and b is a piston
working loosely therein and attached to a piston rod c which is tubular and open
throughout being provided with one or more inlets c' at the top or side and is pro-
vided with a valve dat bottom opening downwards and received in a corresponding
Beat the valve being carried by a short stem guided loosely in the tube, and
being retained in place by a cross bar d beneath it attached to the piston. The
piston has perforations e preferably more numerous in the proximity of the valve.
The piston rod may work through a removable guide at the top of the cylinder if
necessary.
Referring to figure 3 the cylinder and piston are the same as before but the
valve d is received in a seat d' at the top of the piston rod and is carried by the
handle which has a stem g fitting loosely in the tubular piston rod c to which it
is connected by a cross pin h fixed in the piston rod and passing through a slot i
in the stem g so as to permit a certain amount of lift of the valve d independently
of the rod c, to which motion is communicated through the medium of the valve
by moving the handle up and down for the purpose of working the piston.
Referring to figures 4, 5 and 6 the air inlet valve d is received in a seat d³ placed
at the bottom of the cylinder a and opening upwards from a passage or pipe k
outside the cylinder the inlet to which passage is preferably carried up nearly to
the top of the cylinder.
Referring to figures 7 and the hollow piston rod c has a number of radiating
branch pipes c leading through the piston b at such points as to equally distribute
the air beneath the whole area of the piston each branch pipe having a valve d
seated therein as in figure 1, the perforations in the piston being preferably in
clusters around the different valves. Instead of a number of valves the various
branch pipes c may be all controlled by a single valve seated within the hollow
boss from which the branch pipes radiate and closing upwards against the lower
end of the main tube c as will be readily understood.
In figure 9 the branch tubes c³ are shown as controlled all by a single valve
which is opened and closed by the movement of the handle as in figure 3 the valve
closing downwards against a seat within the boss l, and being attached to a solid
rod m passing loosely through the tubular piston rod and terminating at its upper
end in the handle by which the piston is worked the valve being capable of limited
movement within the boss and acting as a medium for the transmission of motion
from the handle to the piston.
In figure 10 the valve d is attached to a tube n open throughout and sliding
freely but closely within the hollow piston rod c, the valve being formed by the
mere end of the tube n, and closing against a seat formed by the bottom of the boss
the seat being solid instead of annular and the branch pipes c³ radiating from
around it instead of from within it as in figure 9.
The tube n, is provided with a handle for working the piston and the tube o, may
be provided with a gland and stuffing box if necessary.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I would observe that
I lay no claim to a cylinder with a perforated piston working therein but what
I claim is
1. An apparatus for beating eggs & consisting in the combination with a cylinder
and perforated piston, of an air inlet and valve whether in the piston rod or cylinder
whereby air will be pumped in at each up stroke and caused to mingle with the

page_text: contents of the cylinder at each down stroke of the piston substantially as herein
described and illustrated in the drawings.
2. The respective apparatus constructed arranged and operating for the purpose
of beating or whipping and aerating liquids or semi liquids as herein described and
illustrated in the respective figures of the drawings.
1
ol 11002
WALTER PATRICK GRAFTON.
By his Agents, A. M. & W Clark,