Improvements in Milking Apparatus.
Year: 1896

page_text: Improvements in Milking Apparatus.
I, PETER JENSEN, of 77 Chancery Lane, London, Chartered Patent Agent, do
hereby declare the nature of this invention a communication to me from abroad
by Carl Gustaf Patrik de Laval of 16 Handtverkaregatan, Stockholm, Sweden,
Doctor of Philosophy and Engineer, to be as follows:-
The present invention refers to an improvement in milking devices for mechanical
milking apparatus, by the employment of which the milking is better and more
completely executed than hitherto. The milking device in question is characterized
by the combination of two elementary parts, namely, one that grips the teat at
the base, acting upon the upper part of the teat by pulling the same, and one that
acts upon the lower part of the teat by straining or squeezing the same.
The milking device consists of rolls and plates. On the movement of the rolls
to each other the communication between the udder and the teat is shut off.
During the following downward pulling movement of the rolls, the milk enclosed
in the channel of the teat between the rolls and the muscle at the point of the teat,
makes the teat swell or bulge. After having reached their lowest, thus determined
position, the milk is squeezed up in a bladder with expanded walls, and the plates
begin their straining or squeezing motion, whereby the milk is pressed out of the
teat with great ease. During the squeezing motion the rolls constantly shut off
the communication between the udder and the teat, thus preventing the milk from
flowing backward up into the udder during said motion of the plates.
Dated this 24th day of January 1896.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
Improvements in Milking Apparatus.
I, PETER JENSEN of 77 Chancery Lane London, Chartered Patent Agent do
hereby declare the nature of this invention (a communication to me from abroad
by Carl Gustaf Patrik de Laval of 16A Handtverkaregatan, Stockholm, Sweden,
Doctor of Philosophy and Engineer,) and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement :-
The present invention refers to an improvement in milking devices for mechanical
milking apparatus, by the employment of which the milking is performed in a
better and more complete manner than hitherto. The milking device in question
is characterized by the combination of two elementary parts, namely, one that
grips the teat at the base acting upon the upper part of the teat by pulling the
same, and one that acts upon the lower part of the teat by straining or squeezing

page_text: the same. By combining these two elementary organs a new effect is produced as
will be explained below."
The new milking organ may be employed in such milking apparatus, which are
suspended on the cow, as well as in such, which are stationed on the ground. For
making the invention fully understood the appliance of the milking organ on a
milking machine, is shown as an example on the accompanying drawing.
Figure 1 is a vertical section, Figure 2 a horizontal section and Figure 3 a plan
of a milking machine. The combined milking device consists of the rolls a a and
the plates bb. The rolls a a are intended to act upon the upper part of the teat
by means of a pulling action, while the plates bb are arranged beneath the rolls
and act upon the lower part of the teat by straining or squeezing the same. The
rolls a a are fixed on the arms 6' 61 that are formed with cogged segments which
engage with each other.
The rolls a receive their motion to and from another by means of the bar f
which is cogged on its one end and engages with one of the cog segments, by
which the arms are connected with another. The other end of said bar fis
formed like a piston and is moreable in the cylinder h. A cog segment fixed on
the piston, engages with a cogged oscillating disc k. The movement of the bar f
in the opposite direction is performed by the spring 1. The movement up and
down of the rolls a is performed by means of an oscillating disc n, which by a
link n is connected with the cylinder h, that turns around the fulcrum p on the
machine frame o. The spring tends to press the cylinder upwards. The plate e
which is provided with a hole for the entrance of the teat between the rolls, and
which bears against the base of the teat, serves as a kicking device under the
pulling action of the rolls.
b
The plates are moving from another and to another. For this purpose the one
plate is fixed to a bar &, the lower cogged part of which is connected with
reciprocating rack through the cogwheel 6. The second plate is fixed to a
sleeve, surrounding the bar 6, said sleeve &, being connected with the bar 6
above mentioned, by means of a link 6. Said bar & receives a reciprocating"
motion by means of a mechanism analogous to that described for the bar f. For
this purpose the other end of the bar bis formed like a piston and is moveable in
a cylinder by means of a cog segment, engaging in a cogged, oscillating disc.
The movement of the bar & in the opposite direction is performed by a spring.
The discs n, k and k¹ are driven from eccentrics on the main shaft A by means
of chains. These eccentrics are adjusted in such a manner that the following
working is obtained.
On the movement of the rolls a a to each other the communication between the
udder and the teat is shut off. During the following downward pulling movement
of the rolls, the milk enclosed in the channel of the teat between the rolls and the
muscle at the point of the teat, makes the teat awell or bulge, as shown in
Figure 1. Said muscle opens only on a certain internal pressure being established,
and the ratio of the pulling movement of the rolls is proportioned in such a manner,
that the rolls move until this pressure is established on the muscle. After having
reached their lowest, thus determined position, the milk is squeezed up in a
bladder with expanded walls, and the plates bb begin their straining or squeezing
motion whereby the milk is pressed out of the teat with great ease. During the
squeezing motion the rolls constantly shut off the communication between the
udder and the teat, thus preventing the milk from flowing backward up into
the udder during said motion of the plates.
The hooks M serve for suspending or otherwise supporting the machine.
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 milking apparatus for mechanical milking apparatus, the combination of a
pulling device comprising laterally and downwardly movable members such as

page_text: rolls, with a squeezing or straining device comprising members such as plates,
situated beneath the pulling device, and means for successively operating the
pulling and the squeezing devices substantially as set forth.
2. The means described and shewn for operating the pulling and the squeezing
devices.
3. The construction of milking machine described and shown.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.