IMPROVEMENTS IN APPARATUS FOR MEASURING LIQUIDS
Year: 1873

page_text: PROVISIONAL SPECIFICATION left by Henry Pattman Trueman at
the Office of the Commissioners of Patents, with his Petition, on
the 21st November 1873.
I, HENRY PATTMAN TRUEMAN, of John Street, Pentonville, in the
County of Middlesex, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN APPARATUS FOR MEASURING LIQUIDS," to be as
follows:-
.
My said Invention is designed to supply an accurate and reliable
apparatus for measuring liquids, and consists in the peculiar construction.
and combination of parts of the apparatus as herein-after described
whereby I effect the desired object and am enabled to produce a liquid
measure which is simple, cheap, and reliable, durable, and not liable to
derangement, and which may be made of any desired capacity, and may
be used for any liquids.
The said apparatus is constructed as follows:-I make a case or box
of tin, iron, brass, or other suitable material, and of any required capacity.
At one side of the exterior of this case I solder or otherwise secure a
vertical tube, whose upper end is provided with an opening for the

page_text: admission of the liquid to be measured. The lower end of the said tube
opens into a small chamber at the bottom of the case; this chamber
contains a valve, whose upper side is fitted to a seat projecting from the
said case.
The said valve has a rod or stem which extends up into the
case or box and carries a float, and is fitted to work freely up and down i
in suitable guides. The said float is preferably a hollow cylinder of thin
metal. A vertical outlet tube or pipe extends through the bottom of
the case or box and up into the same. The height of this outlet tube
regulates the capacity of the chamber as the said tube is open at its
upper and lower ends and therefore. permits the liquid to flow out as it :
rises above the top of the said tube. The float and valve are so arranged
in relation to this outlet pipe that the said valve is closed by the float
when the liquid in the case rises to the top, or nearly so, of the said
outlet tube. This outlet tube is made adjustable so that its height may
be varied or regulated.
The liquid is measured by means of the followin ge ontrivance :—
Inside the case or box I arrange a displacement piece, which is pre-
ferably a half cylinder, mounted in bearings placed at such a height that the
axis of the said piece will be level with the top of the overflow or outlet
tube; therefore by turning the same on its axis it may be either brought
entirely above the surface of the liquid in the case or partially or entirely
immersed therein, and according to the extent of its immersion will be
the quantity of liquid displaced and discharged through the outlet tube.
The shaft of the said half cylinder extends through a stuffing box at one
side of the case, and is provided with a handle whereby it is adjusted.
And in the path of the handle I arrange a dial marked. with the
quantities to be measured, such as pints, quarts, and fractions of the
same, or with other denominations of capacity or weight. The said half
cylinder is provided with a tappet which acts on a spring or lever
extended across the upper end of the valve stem, and which is arranged
to release the valve and cause it to open when the said half cylinder is
turned up out of the liquid. The valve chamber is provided with a
screw cap or cover which permits access to the said valve.