ro
Year: 1886

page_text: We, WILLIAM CUTHBERT BLACKETT of Kimblesworth Colliery, in the County
of Durham Mining Engineer and JAMES LAIDLER of 82 New Elvet, in the City of
Durham, in the County of Durham, 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:—
Our invention has for its object an "Improved Cock for measuring out liquids"
or for running off any given quantity of liquid.
A cock constructed according to this invention has a tapered body, with outlet,
inlet and air pipes.
Into this tapered body is fitted a tapered hollow plug, having inlet, outlet and
air holes, corresponding to those in tapered body of cock.
This inner plug is ground into its place and is opened and shut by means of a
lever or cross handle and is kept into its place by a screw ring.
This cock may have either one or more outlet pipes each measuring different
given quantities of liquid.
It may be fastened to either cisterns or pipes by means of flanges, screw ends, or
plain ends for soldering.
If the inlet is made to screw into any vessel or pipe the air pipe for the outlet
of air will be carried through the centre of inlet pipe for liquid.
In the case of it having two or more outlet pipes measuring different quantities,
the top of the cock will be fitted with a dial and the handle or lever of the cock
with a pointer or indicator to shew out of which of the outlets the liquid is
required to pass.
Fig. I of the accompanying drawing illustrates in vertical section an arrange-
ment of measuring cock according to this invention.
The body of the cock A is shewn in the drawing rivetted to the vessel or cistern P
by Banges B and C.
The outlet of the cock D, is screwed, soldered or cast on to the body of the
cock A.
The plug M is fitted into the body of the cock B and held in position by screw
ring K.

page_text: The internal capacity of the plug M is made of sufficient size to hold the
required measure of liquid.
The plug M is turned by lever N which is held in position by nụt Ọ.
The tube R is fitted into cock for the inlet of air.
When the cock is closed the holes H and G in the plug come opposite the holes F
and E.in the body of the cock A and the liquid enters the hollow plug M at
holes F and H, the air being expelled at holes. G and E.
.
When the plug has had time to fill, it is turned until the holes J and I in the
plug are opposite holes Q and L, thus closing the inlet holes H. and F and the air
holes G and E, when the liquid contained in the plug M passes away by holes H
and Q through outlet D, the air passing into the plug M, through tube R and hole L
to fill up the vacuum left by the liquid.
A cock constructed according to this invention possesses several advantages over
ordinary cocks :-
1. The plug may be made of sufficient capacity to equal any standard liquid
measure.
2. It may have two or more outlet pipes each measuring certain fixed quantities
of liquid.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare what
we claim is
•
Providing a cock with a plug, the internal capacity of which may be made
equivalent to any standard measure, which measure can be delivered, either
wholly out of one outlet or partially out of other outlets in fractional measure of
the whole quantity contained in the plug.
In witness whereof we the said William Cuthbert Blackett and James Laidler
have hereunto set our hands and seals this 12th day of November in the
year of our Lord one thousand eight hundred and eighty six.