Improvements in Vacuum-controlling Apparatus to be used in connection with Milking Machines.
Year: 1894

page_text: Date of Application, 7th Aug., 1894
Complete Specification Left, 7th May, 1895-Accepted 3rd Aug., 1895
Improvements in Vacuum-controlling Apparatus to be used in
connection with Milking Machines.
I, ALEXANDER SHIELS of 190 Bath Street, Glasgow, M.B., C. M., B.Sc., do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements on the vacuum controlling apparatus
or "milk trap" set forth in the Specification of my prior Patent No. 7938 of
1892.
In the present invention the vacuum controlling vessel or trap which is
preferably made of glass, is made hemispherical at its underside instead of
conical and has a double rim or flange which grips and holds in position the
rubber washer so that when the vessel is lifted off the pail the washer comes
with it.
The valve used is a hollow india rubber ball of relatively large size when
compared with the outlet orifice and which is inflated with air or gas. The specific
gravity of the ball is very much less than that of the milk. The size of the ball
and its specific gravity are such that it will float off its seat and thereby open the
orifice leading to the milk pail whenever the vacuum pulsation rises within a
margin of say three degrees, as indicated by the vacuum gauge, of the maximum.
Formerly the valve was not capable of floating, until the vacuum had reached the
maximum.
The bung of the controlling vessel is made with a raised central part in order to
increase its depth and thereby give an additional contact surface for the pipes
which are passed through it.
Dated this 3rd day of August 1894
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
Improvements in Vacuum-controlling Apparatus to be used in
connection with Milking Machines.
I, ALEXANDER SHIELS, of 190 Bath Street, Glasgow, M.B., C.M., B.Sc., 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 improvements in the vacuum controlling apparatus
or "milk trap" set forth in the Specification of my prior Patent No. 7933 of
1892.
And in order that my said invention may be properly understood I have
hereunto appended an explanatory sheet of drawings, whereon,
Fig. 1 is a vertical section and Fig. 2 a plan of the vacuum controlling vessel or
trap.
Fig. 3 is a sectional view showing the apparatus fitted in a milk receptacle.

page_text: In the present invention the vacuum controlling vessel or trap a, which is
preferably made of glass, is made hemi-spherical at the underside instead of
conical and has a double rim or flange b, b', which grips and holds in position
the rubber washer or ring e so that when the vessel is lifted off the pail the washer
comes with it.
The valve used is a hollow india-rubber ball d of relatively large size when
compared with the outlet orifice e aud which is inflated with air or gas. The
specific gravity of the ball d is very much less than that of the milk. The size of
the ball and its specific gravity are such that it will float off its seat and thereby
open the orifice e leading to the milk pail whenever the vacuum pulsation rises
within a margin of, say, three degrees, as indicated by the vacuum gauge on the
milking machine, of the maximum. Formerly the valve was not capable of floating
until the vacuum had reached the maximum.
4
The rubber bung of the controlling vessel is made with a raised central part g¹
in order to increase its depth at that part and thereby give an additional contact
surface for the pipes h, i, which are passed through it.
jis the handle of the pail fand the valve.
As will be seen the vessel a is preferably fitted in a circular extension forming
the mouth of the pail. When the vessel a is fitted in place the rubber ring
washer c fits into the extension / air tight.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
consider novel and desire to claim is :-
The improved construction of vacuum controlling apparatus, substantially as
hereinbefore described with reference to the drawings annexed.
Dated this 6th day of May 1895.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.