Year: 1899

page_text: Date of Application, 14th Feb., 1899
Complete Specification Left, 23rd Oct., 1893-Accepted, 25th Nov., 1899
I, FREDERICK PIERCE BURR, of Burr Avenue, Middletown, in the County of
Middlesex and State of Connecticut, United States of America, Grain and Seed
Merchant, do hereby declare the nature of this invention to be as follows:-
-
This invention relates to an ice cream freezer consisting essentially of a recep-
tacle for the cream or other material to be frozen, mounted to turn in a vessel
or container for the freezing medium and provided with means whereby it may
be rotated by hand alternately in opposite directions.
The outer vessel may be in the form of a pail provided with a removable
bridge piece or cover between which and the bottom of said vessel the inner
receptacle (which is preferably in the form of a can with a tight fitting cover,)
is mounted to rotate, the can being provided with a bearing on its underside
which turns on a pivot on the bottom of the outer vessel and the cover of the
can carrying a pulley formed with a central bearing to receive a pivot pin on
the bridge piece or cover of the outer vessel. The top of the pulley fits in a
recess on the underside of the cover of the outer vessel to form a flange for a
cord or its equivalent which is attached to the pulley and adapted to wind upon
and unwind therefrom, the cord extending through a guide in the outer vessel
and being provided with a handle to enable it to be seized and drawn upon by
the operator. The cord having been wound on the pulley, the pull on it imparts
rotary motion to the inner vessel and the continued rotation of the vessel winds
the cord again upon the pulley in the reverse direction so that when the recep-
tacle finally comes to a standstill, the cord is nearly wholly wound on the pulley
and another pull causes the vessel to be rotated in the opposite direction. Thus
it will be seen that consecutive pulls on the cord causes the receptacle to be
alternately rotated in opposite directions.
The ice in the outer vessel is prevented from coming into contact with the
inner vessel by a perforated guard in the form of wire netting having outwardly
bent flanges secured to the bottom of the outer vessel. This guard fits snugly
around the inner vessel without, however, touching it and permits the freezing
or saline liquid mixture to pass to the external surface of the inner vessel.
Dated this 14th day of February 1899.
Pmprovements in Cream Freezers.
I, FREDERICK PIERCE BURR, of Burr Avenue, Middletown, in the County of
Middlesex and State of Connecticut, United States of America, Grain and Seed
[Price 8d1

page_text: Merchant, do hereby declare the nature of my invention, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The object of the invention is to provide a new and improved ice cream freezer,
which is simple and durable in construction, very effective and economical in
operation, and arranged to require but a slight effort on the part of the operator,
to bring the matter to be frozen to the desired condition, in a very short time.
The invention consists of novel features and parts and combinations of the
same, as will be fully described hereinafter and then pointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding parts
in all the figures:
Figure 1 is a sectional side elevation of the improvement, on the line 1--1
in Figure 2;
Figure 2 is a plan view of the same, with part broken out;
Figure 3 is an enlarged sectional side elevation of the upper bearing for the
receptacle; and
Figure 4 is a like view of the bottom bearing for the receptacle.
The improved ice cream freezer comprises a vessel A in the shape of a pail
or the like, supporting on its bottom a step B engaged by a bearing B' on the
under side of the bottom of a receptacle C, preferably in the form of a can,
having a removable cover C', carrying at its top a pulley C and a pin D, engag-
ing in an aperture A2 in the underside of the cover or bridge A¹, for the vessel A,
said cover or bridge being hinged or removably secured to said vessel by suit-
able fastening devices. The top flange C3 of the pulley C2 fits into a ring E
secured to the under side of the cover or bridge A¹, to form a guide for a cord,
band, chain or a like flexible strip F, winding or unwinding on and from the
pulley C². This flexible strip F is secured at its inner end to said pulley, and
after winding around the same, extends through a guideway A to the outside
of the vessel A, and is provided at its outer end with a handle F', preferably in
the form of a ring adapted to be taken hold of by the operator.
It is evident that when a pull is exerted on the ring F1, and the strip F, a
rotary motion is given to the pulley C2, the cap C¹ and the receptacle C, so that
the strip F unwinds, and as the receptacle keeps on rotating the strip is again
wound up on the pulley but in a reverse direction; and when the receptacle
finally comes to a standstill at the time the strip F is nearly wound up, then
another pull is given to the strip by the operator pulling the handle F¹ a second
time, so that the receptacle is again rotated but in an opposite direction. The
strip Fagain unwinds and is rewound in an opposite direction to the last wind-
ing, so that when the next pull is exerted on the strip a rotary motion is again
imparted to the receptacle C in the opposite direction to the last. Thus, it will
be seen that by the consecutive pulls given to the strip F the receptacle C is
alternately rotated in opposite directions.
In the vessel A is arranged a perforate guard G, preferably in the form of
a perforated cylinder with a solid bottom G¹ having a central aperture G
(Figure 4) for engagement by the pin B to hold the guard concentrically rela-
tive to the receptacle C, without touching the sides thereof, to allow free turning
of the receptacle as above described. The guard G fits snugly to the external
surface of the receptacle C, without, however, touching the latter, the guard
serving to keep the ice H in the vessel between the wall thereof and the guard,
from coming in contact with the revoluble receptacle C. The freezing or saline
liquid mixture H¹, can readily pass through the meshes of the guard G, and come
in contact with the external surface of the receptacle C.
The operation is as follows:
When the receptacle C is filled with the matter to be frozen, and the ice H
with the freezing mixture H' is placed into the vessel A, as described, and the

page_text: said receptacle is rotated alternately in opposite directions, the liquid matter
within the receptacle is caused to travel in the receptacle and to flow up on the
inner wall thereof, to form a hollow centre, and at the same time the liquid
freezing mixture H is caused to travel in the vessel A and to move up on the
external surface of the said receptacle, to insure a thorough cooling and final
freezing of the contents of the receptacle, it being understood that the freezing
mixture is several degrees colder than the ice, and consequently a rapid freezing
of the contents of the receptacle takes place, especially as but a thin layer of
the liquid matter within the receptacle is opposite the layer of freezing mixture
on the outside of said receptacle.
It is understood that by rapidly changing the direction of the rotation of the
receptacle C, its contents and the freezing mixture H¹, the contents, as well as
the freezing mixture, are constantly agitated to cause a very quick freezing of
the contents of the receptacle. As the freezing mixture H' is agitated it searches
through the ice, thereby causing a rapid melting of the ice and a consequent
taking up of heat, to insure a very quick freezing of the contents of the recep-
tacle. As the contents of the receptacle C revolve with the receptacle, and as
the receptacle is not hindered in any way in its rotary motion during the freezing
operation, it is evident that very little power is required from the beginning to
the end of the operation. Thus the freezer works just as easily at the beginning
of the operation as when the contents of the receptacle C are frozen harder than
the ice.
As the can has a tight-fitting cover, when the cover is in place there is no
opening through which the saline solution can gain access to the interior of the
can and spoil the contents; and also the contents of the can will not escape, if
the can is rolled about or upset.
As the contents of the can Û have a rapid centrifugal motion, as well as a
pulsating up and down motion, which motions are instantly reversed at very
short intervals by the ever reversing motions of the can, the contents of the can
are in a state of effervescence until solidified; consequently no scraper or agitator
is required.
Without this reverse motion, and with the centrifugal force exerted constantly
in one direction, the more solid or creamy part of the contents of the can would
seek the periphery, while the watery or more fluid portion would take the centre,
and consequently make a mixer or scraper necessary for freezing a uniform cream
or ice.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what
I claim is:
-
An ice cream freezer, comprising a can having a cover with a pulley for
engagement by a flexible strip for imparting an alternate forward and back-
word motion to the can, the latter being surrounded by a perforate guard and
both the guard and can being removably contained in a vessel adapted to contain
the freezing mixture and having bearings at top and bottom for the can to turn
on, substantially as described.
100
1000
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.