An Improved Apparatus for Delivering Measured Quantities of Liquid, and Registering the same.
Year: 1895

page_text: Date of Application, 9th Nov., 1895
Complete Specification Left, 10th Aug., 1896-Accepted, 12th Sept., 1896
PROVISIONAL
SPECIFICATION.
An Improved Apparatus for Delivering Measured Quantities of
Liquid, and Registering the same.
I, ALFRED DARBY, of 3, Union Row, Tower Hill, London, Merchant, do hereby
declare the nature of this invention to be follows:-
My invention consists of an improved measuring draw off tap whereby accurate
quantities of liquid may be drawn off for retail delivery or otherwise, without
transference from a separate measuring vessel, and whereby if required the aggregate
quantity so drawn off may be registered.
The invention consists of a draw off tap of which the plug or rotating part is
hollow and constitutes a measuring chamber having a capacity equal to the unit of
measurement and provided with inlet and outlet ports which by the rotation of the
plug in its socket may be alternately made to coincide with the supply and delivery
ports of the socket so that when the inlet is opened to the hollow plug the outlet
therefrom is closed and vice versa, the said inlet and outlet respectively corresponding
to the supply pipe and the delivery nozzle. The rotating plug may be made
wholly or partly of glass and may be left sufficiently exposed to view to enable the
rise of the liquid therein to be watched. Or the plug may be wholly of metal or
earthenware and be provided with an index to denote when it is full.
The plug is provided with a lever or other means of rotating it, and with vent
and relief valves or equivalent means of permitting entry of air to replace the
outflowing liquid and the exit of the air displaced by the entering liquid without
allowing the latter to escape. The vent might be provided for by a port in the
plug coinciding with an air inlet port in the socket, but the relief valve would be
float operated and may advantageously be formed of a glass bulb or other float
which might either operate a valve directly or through a lever or might itself be
seated so as to act both as float and valve, and it may combine the double function
of vent and relief valve and likewise serve as a tell-tale to show when the
measuring chamber is full.
By combining a registering or counting device with the measuring plug so that
each partial rotation of the latter is recorded, the total quantity drawn off may be
readily ascertained.
Dated this 9th day of November 1895.
A. M. & W M. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.
An Improved Apparatus for Delivering Measured Quantities of
Liquid, and Registering the same.
, ALFRED DARBY of 3, Union Row, Tower Hill, London, Merchant, 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:-
My invention consists of a measuring draw off tap of simple and inexpensive

page_text: construction whereby accurate quantities of liquid may be drawn off for retail
delivery or otherwise.
The invention will be described with reference to the accompanying drawing
which represents a vertical sectional elevation of my improved measuring tap.
The invention consists of a draw off tap of which the plug or rotating part A
is hollow and constitutes a measuring chamber having a capacity equal to the unit
of measurement. This hollow plug A is fitted to rotate in a socket B and is pro-
vided with an inlet port a and an outlet port a' which by the rotation of the plug
in its socket may be alternately made to coincide the one with the supply passage b
and the other with the delivery nozzle b¹ of the socket so that when the ports a b
coincide the outlets a¹ b' do not coincide and vice versa. The rotating plug A
might be made wholly or partly of glass, or metal, and when of glass might be left
sufficiently exposed to view through apertures on the sides of the socket 13 to
enable the rise of the liquid therein to be watched. In the example illustrated the
plug is supposed to be made of metal and to be provided with an index or tell-tale
to denote when it is full.
The hollow plug may be closed at the lower end by a screw A¹ which serves by
being screwed in more or less as a means of accurately regulating the capacity of
the hollow plug. When regulated the screw may be soldered in or otherwise fixed
to prevent alteration of the capacity.
The plug is retained in its socket by a nut and washer and is provided with a
handle C or other means of rotating it and with a valve-controlled vent d permitting
entry of air to replace the outflowing liquid and the exit of the air displaced by the
entering liquid without allowing the latter to escape. The vent dis preferably
formed through the handle and is closed against the escape of liquid by a conical
or other valve e closing against a seat e', the valve and its seat being either within
the hollow plug or in a chamber above and communicating therewith. The valve
is closed by a float within the hollow plug which may advantageously be formed
of a glass bulb attached directly to the valve stem. It may combine the double
function of vent and relief valve the valve stem likewise serving as an index or
tell-tale to shew when the measuring chamber is full. This it does by the upper
end of the valve stem rising slightly above the handle C. To prevent the valve
falling out of position the head of the valve stem may be provided with a slot g
traversed by a pin fixed in the handle and permitting the necessary rise and fall
of the valve.
By combining a registering or counting device with the measuring plug so that
each partial rotation of the latter is recorded, the total quantity drawn off may be
readily ascertained.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The herein described measuring draw off tap constructed of a hollow plug forming
the measuring chamber fitted to rotate in a socket and provided with ports and
with an air vent controlled by a float-operated valve as herein shewn and
described.
A. M. & WM. CLARK,.
53, Chancery Lane, London, Chartered Patent Agents.