An Improved Apparatus for Heating Milk.
Year: 1893

page_text: Date of Application, 19th Dec., 1893-Accepted, 17th Feb., 1894
COMPLETE SPECIFICATION.
An Improved Apparatus for Heating Milk.
I, ROBERT EDWARD EVENDEN of "Heaton," North Coburg in the Colony of
Victoria, Churn Manufacturer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention relates to an improved apparatus that has been designed mainly
for heating milk to the requisite temperature for its being fed to a cream separator.
In order to fully explain my invention I will describe it by reference to the
accompanying sheet of drawings in which-
Figure 1 is a central section through the apparatus, and
Figure 2 a plan looking down on its top, whilst
Figure 3 is a central section of the outer pail or cistern of the apparatus and
shewing its milk supply pipe and the valve and float gear for controlling the milk
supply.
In constructing the apparatus I first provide a cylindrical pail or cistern A
having about its centre a detachable outflow stand pipe B the height of which is
about two thirds that of the total depth of said pail or cistern.
Entering through the side of cistern near its bottom is the milk supply branch A'
leading in a tangential line thereinto and having its inner end furnished with a
butterfly or throttle valve A³ that is governed by a float A'. Within the cistern
I arrange concentrically two annular steam chambers C and C' one within the
other the inner annular chamber C being about two inches larger in internal diameter
than the central stand pipe B and the outer annular chamber C₁ about two inches
larger in internal diameter than the external diameter of the inner annular
chamber C whilst a clear annular space about two inches in width is left between
the external diameter of the outer annular chamber and the inside of pail or
cistern. Both said annular steam chambers are made separate and distinct from
each other and from the cistern to allow of their being easily removed and cleaned
and when in position the top end of both chambers are about one inch below that
of the central stand pipe B. The inner annular chamber C has a clear space of
about one inch left between its bottom and the bottom of the cistern and both
the annular chambers are coupled together by piping C³ to allow steam to be
passed through them. The outer aunular steam chamber C¹ rests on the bottom
of cistern A and it is retained at its position by flange or rim pieces c that are
soldered or otherwise secured to the bottom of cistern, the inner annular steam
chamber C is held up to leave a passage way for the milk under its lower end by
the pin c', again chamber C is held concentrically within chamber C' by the bracket
pieces attached to chamber C and the central stand pipe is held at its proper
position within the latter by its having the triangular guide pieces attached to it
as shown.
The steam enters the inner annular chamber at its top end through a pipe C*
that leads to near its bottom and passes out therefrom through branch pipe C³ at
its top end that is connected with the top end of outer tubular chamber C¹ and
thence out from the bottom end of the latter at its opposite side through pipe C+.
The milk enters the cistern through the tangential branch A' and circulates
within the outer annular space and ascends and flows over the top end of the outer
annular steam chamber Cinto the space between it and the inner annular steam
chamber C, then under the latter to the space between it and the central stand
pipe B over the top end of which it flows and down through it to the outlet pipe B'.
The butterfly or throttle valve A* has an arm a attached to it that is connected by

page_text: rod a' with the float A³, said rod being retained at its vertical position by a slotted
guide a upon inside of pail whilst the position of the float on the rod is adjusted
by the thumb screw a Float A controls valve A* by means of which the
supply entering through tangential branch A¹ is regulated, such float being
arranged in the space between the outer annular steam chamber C¹ and the inside 5
of cistern.
The cistern and all parts with which the milk contacts is preferably made of
tin or tinned metal and such cistern may be mounted on three legs or standards
as marked D, also an air valve or pet cock is provided on the upper end of the
outer annular steam chamber C¹ to allow of its being blown through when turning 1
on the steam supply. Although I have described the apparatus as mainly designed
for heating milk it may also be employed for cooling the milk by passing cold water
through the annular chambers in place of steam, also I wish it to be understood that
I do not confine myself to the measurements herein given for the width of the milk
spaces as such will necessarily have to be governed by the size of apparatus and 1
quantity of milk that has to be passed through it in a given time.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In an apparatus for heating milk an annular steam chamber or chambers 2
arranged within a pail or cistern and over the walls of which annular, chamber or
chambers the milk to be heated is caused to flow substantially as herein described.
2. In an apparatus for heating milk the combination of the pail or cistern
thereof having a central movable stand pipe with the two concentrically arranged
annular steam chambers substantially as herein described and as illustrated in my 2
drawings.
3. In an apparatus for heating milk, the combination of a butterfly or throttle
valve governed by a float with the inlet end of the milk supply branch substantially
as herein described and explained and as illustrated in my drawings.
4. An apparatus for heating milk, consisting of the pail or cistern A furnished 3
with inlet branch A' and outlet pipe B in combination with the concentrically
arranged annular steam chambers C and C¹ and their pipes and connections all
arranged substantially as herein described and as illustrated in my drawings.
Dated this 18th day of December 1893.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.