Improvements in Fat Testing Instruments for Milk and Milk Products.
Year: 1899

page_text: Date of Application, 24th Aug., 1899
Complete Specification Left, 17th May, 1900 -Accepted, 23rd June, 1900
PROVISIONAL SPECIFICATION.
Improvements in Fat Testing Instruments for Milk and Milk
Products.
We, WILLIAM THOMAS WEBSTER, F.R.M.S., of No. 252, Caledonian Road, in
the County of London, Analytical Chemist, and THE DAIRY OUTFIT CO., LIMITED,.
of No. 251, Pentonville Road, King's Cross, in the County of London, do hereby
declare the nature of this invention to be as follows:-
This invention relates to fat testing instruments for milk and milk products
of the kind in which the butter fat is released by the addition of chemical
substances and subsequently separated by centrifugal action. The object. of the
present invention is to produce an instrument of the kind indicated which is
simple and reliable in operation which will show whether or not the sample of
milk contains a standard quantity of fat, so that while the instrument will not
accurately show the percentage of fat in the milk it will indicate at a glance
whether the milk contains sufficient fat to reach a prearranged standard.
The tubes for containing the milk samples are closed at one end and are
marked and indicate the proper quantities of chemicals also of milk to be
tested, so that all that the operator needs to do is to charge in the chemicals
and milk up to the respective marks, after which the tube is stoppered with a
rubber stopper, energetically shaken and put into the centrifugal apparatus
and whirled in the ordinary way.
The tubes are also graduated with two other marks to the lowermost of which.
when the tube is inverted the separated fat can be brought by adjustment of
the stopper so that if the column of fat extends between the two graduation
marks, the milk contains the predetermined standard of fat.
Dated this 24th dow of suust 1800
F. W. GOLBY,
Patent Agent, 36, Chancery Lane, London, W.C.,
Agent for the Applicants.
Improvements in Fat Testing Instruments for Milk and Milk
Products.
We, WILLIAM THOMAS WEBSTER, F.R.M.S., of No. 252, Caledonian Road, in
the County of London, Analytical Chemist, and THE DAIRY OUTFIT CO. LIMITED,
of No. 251, Pentonville Road, King's Cross, in the County of London, do hereby
declare the nature of this invention and in what manner the same is to be per-
TD 077

page_text: formed to be particularly described and ascertained in and by the following
statement:-
This invention relates to fat testing instruments for milk and milk products
of the kind in which the butter fat is released by the addition of chemical
substances and subsequently separated by centrifugal action. The object of the
present invention is to produce an instrument of the kind indicated which is
simple and reliable in operation which will show whether or not the sample or
milk contains a standard quantity of fat, so that while the instrument will not
accurately show the percentage of fat in the milk it will indicate at a glance
whether the milk contains sufficient fat to reach a prearranged standard.
The tubes for containing the milk samples are made of glass or other trans-
parent material and closed at one end F, as shown in the accompanying draw-
ing, and are marked at the sides as shown at AB and C to indicate the proper
quantities of chemicals also of milk to be tested; so that all that the operator
needs to do is to charge in the chemicals and milk, through the mouth G of
the tube up to the respective marks, A B and C, after which the tube is stop-
pered with a rubber stopper H, energetically shaken and put into the centri-
fugal apparatus and whirled in the ordinary way.
The tubes are also graduated, preferably on the diametrically opposite side,
with two other marks D and E to the lowermost, E. of which, when the tube is
inverted, that is to sav, held with the closed end F upward, the separated fat
can be brought by adjustment of the stopper H. so that if the column of fat
extends between the two graduation marks, E and D the milk contains the pre-
determined standard quantity of fat.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
A transparent fat testing tube for milk and milk products having marks to
indicate the quantities of the material to be charged thereinto and two addi-
tional marks forming a measured standard of the column of fat obtainable from
the quantities of the materials in the sample under treatment substantially as
described.
1000
F. W. GOLBY,
Patent Agent, 36, Chancery Lane, London, W.C.,
Agent for the Applicants.