CERTAIN IMPROVEMENTS IN SLIP, CLAY- PRESS, AND BARM TAPS
Year: 1879

page_text: LETTERS PATENT to Isaac Samuel Barnett, of Wolstanton, and John Hodgkins,
of Tunstall, both in the County of Stafford, Partners as Brassfounders and
Coppersmiths, for the Invention of "CERTAIN IMPROVEMENTS IN SLIP, CLAY-
PRESS, AND BARM TAPS."
Sealed the 18th July 1879, and dated the 20th January 1879.
PROVISIONAL SPECIFICATION left by the said Isaac Samuel Barnett and
John Hodgkins at the Office of the Commissioners of Patents on the 20th
January 1879.
ISAAC SAMUEL BARNETT, of Wolstanton, and JOHN HODGKINS, of Tunstall, both
in the County of Stafford, Partners as Brass Founders and Coppersmiths.
"CER-
TAIN IMPROVEMENTS IN SLIP, CLAY-PRESS, AND BARM TAPS."
This Invention relates to certain improvements in slip, clay-press, and barın taps,
and the advantages of our improvements are that the taps are more durable and
less liable to get out of repair, they are more simple, convenient, and strong, do not
require the use of a spanner, and are not so expensive to repair as those hitherto
in use.
In carrying out our improvements the stalk is arranged so that it has only to be
pressed inwards and drawn outwards by its handle to shut off or put on the slip or
barm, and the stalk does not interfere with the seating of the valve, as it is free to
go on its seat.
The valve operated by the stalk (the notch of which drops in a recess in the
valve) comes under a wedge having an inlet on each side, which wedge puts the
valve in its seat instantly, thereby preventing any escape of the slip or barm. This
construction allows of the valve being repaired at very little expense, as also can
the face or seating of the valve.
The union of the tap is in one piece, which allows of the nozzle being made
stronger, and will thereby prevent the notches breaking off, much breakage being
the case with the nozzles at present in use.
The union is screwed with a left hand thread, so that it cannot become unscrewed
in the act of being connected.
To prevent the slip or barm damaging the face of the valve seating wo form the
valve with a hole so that the margin round the hole will remain on the face or

page_text: seating of the valve when the slip or barm chamber is being filled, and thereby
protect it, as it will act upon the back of the valve, instead of on the face, and in
which case the slide box will be lengthened.
These improved taps can be used with all the various clay presses, barm presses,
and sling pipes without any alterations having to be made therein.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Isaac Samuel Barnett and John Hodgkins in the Great Seal
Patent Office on the 19th July 1879.
ISAAC SAMUEL BARNETT, of Wolstanton, and JOHN HODGKINS, of Tunstall, both
in the County of Stafford, Partners as Brassfounders and Coppersmiths.
"CER-
TAIN IMPROVEMENTS IN SLIP, CLAY-PRESS, AND BARM TAPS."
This Invention relates to certain improvements in slip, clay-press, and barm taps,
and the advantages of our improvements are that the taps are more durable and
less liable to get out of repair, they are more simple, convenient, and strong, do not
require the use of a spanner, and are not so expensive to repair as those hitherto
in use.
But to make our Invention better understood we will describe the same by
reference to the accompanying Drawing, in which Figure 1 is a side elevation of
our improved tap, and Figures 2 to 11 detached views of the various parts. Similar
letters in all the Figures represent similar parts.
In carrying out our improvements the stalk A is arranged as shewn in Figures 1
and 4, and so that it has only to be pressed inwards and drawn outwards by its
handle B to shut off or put on the slip or barm, and the stalk A does not interfore
with the seating of the valve as it is free to go on its seat.
The valve C, shewn in Figure 4, in front view at Figure 8, in side section at
Figure 9, and end section at Figure 10, is operated by the stalk A, the notch O of
which drops in a recess in the valve, shewn in end section at Figure 11, acting in
the recesses shown in Figures 9 and 10. The valve coming under the wedge D,
having an inlet on cach side, as shewn in Figure 7, the wedge D puts the valve C
in its scat instantly, thereby preventing any escape of the slip or barm. This
construction allows of the valve C being repaired at very little expense, as also can
the face or seating L of the valve.
The union E of the tap is in one piece, which allows of the nozzle M being made
stronger at F, Figure 2, and will thereby prevent the notches marked N breaking
off at F, much breakage being the case with the nozzles at present in use. G is
the lock nut, which is shown in section at Figure 10.
The union E is screwed with a left hand thread at H, Figure 1, so that it cannot
become unscrewed in the act of being connected at G.
To prevent the slip or barm damaging the face of the valve seating L we form
the valve with a hole, as shewn at Figure 3, so that the margin round, the holo will

page_text: remain on the face or seating L of the valve when the slip or barm chamber is
being filled, and thereby protect it, as it will act upon the back of the valve instead
of on the face, and in which case the slide box will be lengthened.
These improved taps can be used with all the various clay presses, barm presses,
and sling pipes, without any alterations having to be made therein.
Having thus described our said Invention and the manner of performing the
same, we wish it to be understood that we do not confine ourselves to the preciso
details herein laid down and shewn in the Drawing, as the same may be varied
without departing from the peculiar character of our Invention, but what we do
claim is,
The general arrangement and construction of the improved slip, clay-press, and
barm tap, arranged and operating substantially in the manner and for the purposes
herein before described, and represented in the accompanying Drawing.
In witness whereof, we, the said Isaac Samuel Barnett and John Hodgkins,
have hereto set our hands and seals, this Eighteenth day of July, in the
year of our Lord One thousand eight hundred and seventy nine.