The Iola register. [volume] (Iola, Allen County, Kansas) 1875-1902, 1897-08-06

same objection that is to be brought
against the Swedish apparatus-the use
of so much rubber tubing, which it
is impossible to keep entirely clean,
sweet and wholesome.
The Country Gentleman says of the
Thistle mixer:
The continuance is very simple in OPP
GRAFTON, and closely initiates the action
of the calf in sucking. 1t can easily be
manipulated by the exercise of ordina-
~ intelligence and requires so little at
tention that ten COWS can be MIXED by
it with the supervision of only one at
tendant
The principle is the application to
the COWS teats of india rubber teat
cups, in which the action of suction is
produced by pulsation.
The machine consists of single &C.
ton vacuum air pump running at about
81 revolutions per minute, which ex-
hausts the air from a cylinder fixed in
any convenient position. Valves are at
tached to the pump, which open and
close 40 times per minute, causing the
pulsation, the vacuum in the pipes al
ternating between inches and Is inch
es. From the cylinder a pipe runs along
the COW shed over the heads of the
COWS. Short branch pipes. with valves
attached, extend downward between al
ternate cows. When commencing to
milk each COW, an india rubber tube is
slipped on one of these branches, the
other end being attached to the glass
milk receiver, which is placed on top Of
the pail and held in position there by
the vacuum.
While the machine is working the
pail stands near the cows fore legs.
The pail is tin milkpail with fixed
cover, made specially strong. A fitting
is provided in the cover on which the
glass receiver rests. A small hole with
a, rubber plug is also provided, which
enables the vacuum to be destroyed at
will.
From the receiver another india rub
Der pipe is connected with the teat cups
by five branch metal tube called ''the
claw" all connections being made by
simply slipping the rubber tube on to
the end of the metal tubes. When the
COW is finished, the valve on the short
branch pipe is closed, the teat cups then
come off easily, the tube is disconnect-
ed, and the contents of the pail may
be emptied.
The teat cups are made of india rub
Der and are most ingeniously construct
ed. The top rounded edge consists of a
ring of thicker rubber, which attaches
itself, when the vacuum is put on, soft
" but firmly to the cows udder, while
the under part of the teat cup complete
ly envelops the teat. The popularity
Of these cups consists of the varying
thickness of the sides, and also of two
loose flaps or tongues of rubber inside,
which act as follows: The pulsating ac-
ton of the vacuum on the teat cups al
ternates between a pressure of 8 inches
and 10 inches. The smaller pressure is
Just sufficient to hold the teat cups soft
~ but firmly up to the udder, but not
sufficient to cause the sides of the cup
to collapse and press against the teats.
See Fig. /. The moment, however, the
greater vacuum is applied the two loose
tongues inside the cup press the upper
part of the teat Gig. p, and the pres
sure gradually passes down the teat,
beautifully initiating the action of the
calf sucking, and somewhat resembling
full handed milking. See Fig. 8.
There are 40 of these pulsations every
minute, and all four teats are MIXED
at once.