Improvements in Taps and Cocks for use with Corrosive Liquids.
Year: 1893

page_text: Date of Application, 14th Sept., 1893-Accepted, 4th Nov., 1893
COMPLETE SPECIFICATION.
Improvements in Taps and Cocks for use with Corrosive Liquids.
We, EDWARD PARTINGTON of Turn Lea Mills Glossop in the County of Derby,
Paper Manufacturer, and SAM BAMFORTH, of the Glossop Iron Works, Glossop,
Engineer, 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 taps and cocks intended to be used for controlling the
passage of corrosive liquids. Such taps and cocks are sometimes made of brass and
gun-metal, lined with another metal or a material which is unacted upon by the
liquid passing therethrough, but the linings are usually defective. Our object is to
construct them with brass or gun-metal bodies as at present, and to employ a
protective lining therein, but to so construct and arrange this lining that whilst it
effectively prevents contact of the corrosive fluid with the corrodible walls, it does
not crack break or give way..
We will, with the aid of the accompanying drawings describe in what manner we
may apply our invention to a taper plug tap, this being the form more commonly
used.
In these drawings:-
Figure 1 is a vertical longitudinal section;
Figure 2, a transverse vertical section; and
Figure 3, a horizontal section.
A is the body of the tap constructed in the usual manner of brass iron gun-metal
or the like. B is the taper plug; and D the lining, which is indicated by the thick
lines and black parts. This lining may be of metal or of such other suitable
material as may be required in particular cases. For example in the case of
sulphuric acid solutions, sulphite liquors and the like, the lining may be a hard lead
alloy. Other metals and materials would be employed according to my invention
in a similar manner.
The taper plug itself is best wholly coated with the lead alloy because it is not
found that any mischief arises in use from this, but only from the outer walls or
body of the tap.
The ports or passages CC, are recessed and bushes of lead alloy cast for the
purpose, are inserted into these recesses E E. The passages leading to the ports
and the ports themselves are coated with lead alloy, and the bushes are burnt or
fused in. The recesses being formed on the inner face of the tap, the bushes
therein are turned and ground down to form seatings for the plug. It will thus be
evident that any liquid passing through the tap can come into contact only with the
lead allow and the body of the tap will be preserved from action.
As already set forth, we do not limit ourselves to lead alloy for the lining, nor
to the particular form of cock or tap illustrated, nor do we limit ourselves to any
O particular form or dimensions for the bushes in the recesses E E, save that they
must be sufficiently wide to prevent the passage of the liquid to the side of the bore
between the ports when in use.
The recesses may be formed by a milling tool passed through the opposite opening
into the tap.
5 Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. Linings for taps and cocks, consisting of a coating of protective metal or
material thickened or taking the form of a bush around each seating, constructed

page_text: and arranged substantially as hereinbefore described and as illustrated by the accom-
panying drawings.
2. In combination with taps and cocks, a lining or internal coating thickened
around the seating or seatings, substantially as and for the purpose hereinbefore
described and as illustrated by the accompanying drawings.
Dated this 12th day of September A.D. 1893.
WILLIAM E. HEYS,
Agent for the Applicants.