A Tap for Measuring Stated Quantities of Ink into Ink-holders, for use in Schools and other places.
Year: 1889

page_text: Date of Application, 6th Dec., 1889
Complete Specification Left, 5th Sept., 1890-Accepted, 15th Nov., 1890
PROVISIONAL SPECIFICATION.
A Tap for Measuring Stated Quantities of Ink into Ink-holders, for
use in Schools and other places.
WILLIAM ALDRED Lewell of 41 Osbaldeston Road, Stoke Newington, London N.,
Schoolmaster, and WILLIAM HENRY CARTWRIGHT of 41 Osbaldeston Road, Stoke
Newington, London N., Mechanic, do hereby declare the nature of this invention to be
as follows:
-
The invention consists in the application to a reservoir A, for holding the ink to be
discharged and measured, of a horizontal plug provided at opposite sides with two
recesses C, D for holding a measured quantity of ink.
The plug is turned by a handle E, and the recesses are so disposed, that, while one
is being filled the other is being emptied, each recess therefore alternately receiving
and discharging a measured quantity of ink.
Suitable air-ducts F, F' are provided for assisting the flow of the ink.
WILLIAM ALDRED LEWELL.
WILLIAM HENRY CARTWRIGHT.
COMPLETE SPECIFICATION.
A Tap for Measuring Stated Quantities of Ink into Ink-holders, for
use in Schools and other places.
WILLIAM ALDRED LEWELL of 41 Osbaldeston Road Stoke Newington London N.
Schoolmaster, and WILLIAM HENRY CARTWRIGHT of 41 Osbaldeston Road Stoke
Newington London N. Mechanic 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, referring to the sheet of drawings filed with the
Provisional Specification
The invention consists of a tap E G H (Fig. 1) fitted with a horizontal plug
provided with two recesses C and D for holding the measured quantity of ink.
The plug is turned by a handle E and the recesses are so disposed, that, while one
is being filled the other is being emptied, each recess, therefore, alternately receiving
and discharging a measured quantity of ink.
The tap is made of brass and is fitted to a reservoir A for holding the ink to be
discharged and measured.
Air ducts are necessary for the discharge of the ink into the ink-holders and are
provided as follows:-
The part F K of the air duct, consists of a piece of brass tube attached to the
outside of the reservoir A and fitted into a hole bored in the shell of the tap at K.
Other ducts are bored through the plug at F and L communicating with the
chambers D and C respectively.
The ducts are so arranged that when the plug is brought into position for the
discharge of the ink they are alternately continuous with the outer duct F' K.
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. That our invention is a tap containing a horizontal plug fitted on opposite sides
with a recess for holding a measured quantity of ink, the recesses are so disposed that
while one is being filled the other is being emptied.

page_text: 2. Necessary air ducts are provided and are so arranged that the requisite
atmospheric pressure shall be supplied to the discharging chamber immediately the
plug is brought into the position necessary to bring about the discharge.
And we declare that the whole is constructed as above described and for the
purpose stated in this our Complete Specification.
Dated this 5th day of September 1890.
WILLIAM ALDRED LEWELL.
WILLIAM HENRY CARTWRIGHT.