IMPROVEMENTS IN THE METHOD OF AND MEANS OR APPARATUS FOR POURING, DRAWING OFF, MEASURING, AND REGULATING THE FLOW OF LIQUIDS
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by David Pitcairn Wright at the
Office of the Commissioners of Patents, with his Petition, on the
5th May 1868.
.I, DAVID PITCAIRN WRIGHT, of the Firm of Wright and Butler, of
Birmingham, in the County of Warwick, Lamp Manufacturers, do hereby
declare the nature of my said Invention for "IMPROVEMENTS IN THE
METHOD OF AND MEANS OR APPARATUS FOR POURING, DRAWING OFF, MEASURING,
AND REGULATING THE FLOW OF LIQUIDS," to be as follows (that is to say) :—
My Invention consists in forming with or connecting to the main
mouth of the vessel (holding the liquid I desire to pour or draw off)
a combination delivery spout in connection with a plug or stopper which
may be self-acting or otherwise, the principle of action being that as the
measure or other receptacle to be filled is held to the delivery pipe or
the delivery pipe brought over the said measure or receptacle and the
liquid in the vessel, or with the vessel being elevated, it will flow
through the compound delivery pipe, which has an airway constructed
with it that permits the air to enter the vessel as the liquid runs out
through this improved apparatus or tap until the receiver is sufficiently
filled, all overflowing being entirely prevented, whether the operation

page_text: of pouring or drawing off be performed in the dark or otherwise, as the
moment the liquid in the receiver reaches the airway of the delivery
pipe the air will be thereby cut off and the liquid in the portable or
fixed vessel will cease to flow. The operation of pouring or drawing
off being effected the connection between the compound delivery pipe
and the interior of the vessel is cut off by the plug before mentioned,
so that the most volatile or explosive spirit or other liquids may be kept
under convenient and certain control without danger of explosion from
external causes, as also from spilling or wasting.
In adapting my improvements for use as an ordinary draw-off tap
to large fixed vessels I apply it near the bottom of the vessel holding.
the liquid in the ordinary way according to the material of the vessel,
and place a fixed measure immediately below it so that the airway of
the delivery pipe shall be level with the top edge of the measure to be
filled, which measure I prefer forming with a conical or funnel-formed
bottom with a delivery pipe and stop-cock, which, being cut off and
the plug turned, the compound delivery pipe will be free, the one pipe
being clear for admitting air into the vessel while the liquid is flowing
out through the other, which it will continue to do until the measure is
full of the liquid so drawn off, which, on rising in the measure to the
airway of the delivery pipe, cuts off the supply of air and stops the flow,
when the main plug of the tap in connection with the delivery pipe
should be turned so as to cut off the supply, and the plug at the bottom
of the measure opened to allow the liquid so drawn off and measured
to flow down into a bottle or other receiver or receptacle for use. When
using this improved regulating tap for ordinary use the intermediate
measuring vessel will not be required.