IMPROVEMENTS IN TAPS FOR VISCOUS FLUIDS
Year: 1886

page_text: I, CHARLES MORRIS FARROW of 2 Thomas Street Swansea in the County of
Glamorgan Colour Maker do hereby declare the nature of my Invention for
IMPROVEMENTS IN TAPS FOR VISCOUS FLUIDS to be as follows:-
.
The object of this Invention is to provide a cleanly; and simple and efficient tap
for the delivery of semi-fluid or viscous substances as paint syrup and such like.
In delivering viscous substances by an ordinary tap as in filling pots with paint
and such like operations the adherence of the substance to the parts of the tap
outside the cut-off valve, is a cause of annoyance as the stream continues some
time after the cut-off has been effected. This prevents rapid manipulation and
accuracy in measuring and also droppings are likely to fall and dirty the outsides
of the vessels while they are being put under or taken from under the tap.
remedy these defects I put my cut off valves or slides close to the orifice from
which the material is to be discharged and so leave practically no other than a
mere edge, lower than the valve and thus prevent, from want of surface,-the
substance adhereing.
To
The arrangement will be best understood by reference to the accompanying
drawings.
In using those taps the tube is supposed to be vertical.
Figs. 1 and 2 represent views of the tap while fig. 3 represents a section on the
line xy (Fig. 1). I here represent a.form having two cut off slides or valves but
of course, only one; would suffice.
A A is a tube having a screw thread on one end, B B are pillars or supports
cast with or otherwise fastened to this tube and slotted on the top for the levers CC
to work in forming a joint or hinge.
DD are two alides working in slots and forming the slide valves for closing the
tube. These are hinged to the levers C C at E being bent at right angles to meet
the levers outside the more substantial portion of the tube containing the slide
slots; and hinged to the levers by pins. These pins project and carry the ends of
spiral springs F F by the reaction of which the valves or slides are closed. G is
a circular disc countersunk so as to make the inner edge surrounding the orifice a
n

page_text: mere edge. The size of this disc may be varied and it forms a convenient guide
in putting the vessel in place.
The action of the tap is as follows:-
The screw forms a convenient connection with the vessel or pipe from which the
material is to be drawn. When the vessel to be filled is put in its place, the two
levers are grasped and squeezed together against the reacting springs and the valves
are opened. On the release of the levers, the reaction of the springs closes the
valves and the stream of material is practically instantaneously cut off.
Dated this 13th day of January 1886.
I CHARLES MORRIS FARROW of 2 Thomas Street Swansea in the County of
Glamorgan, Colour Maker do hereby declare the nature of my invention for
IMPROVEMENT IN TAPS FOR VISCOUS FLUIDS, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement
The object of my invention is to provide a suitable tap for the discharge of
viscous fluids such as paints varnishes &c and consists in arranging the parts so
that in closing the tap; the discharge immediately ceases. To secure this end, the
slide or slides which close the passage are placed as near to the orifice of discharge
as possible and having no wall nor passage under the closing valve or slide to which
the viscous material night adhere, thus securing an immediate cut off. The arrange-
ment by which I obtain the desired effect is shown in the accompanying drawings.
The arrangement shown in my provisional specification, for actuating the slides
or valves is here somewhat modified and is an improved form.
Referring to the drawings Fig. 1 is an elevation of the tap which is used in a
vertical position, A is a tube having a screw thread on the top end to screw into
the pipe or socket to which the tap is to be attached. This tube has a broad
flange B on its lower end which is shown in the section Fig. 2. This flange has
two radial slots cut in it C C (Fig. 3); Fig. 3 is a section on the line -y viewed
upwards while Fig. 4 is a downward view on the same section. Two circular
plates D & H embrace this flange B both having holes through their centres, the
top plate or disc fitting over the tube and is recessed to hold the flange while
the bottom plate or disc D is also recessed to contain two segmental slides E E
(Fig. 4). These slides are hinged by pins F F to the bottom plate D while two
pins GG project from their surfaces upwards and enter and engage in the slots C C.

page_text: The two plates or discs are fastened together by the screws K K K or otherwise
and thus the whole of the parts are secured together. It will be observed that the
combined discs or plates are moveable round the flange, limited only by the pegs
in the valves or slides.
The moving of the discs D & H opens or shuts the slides.
Referring to Fig. 4 E E are the positions of the slides when the tap is open.
On moving D & E the slides will take the positions represented by the dotted
lines each slide covering on half of the hole in the lower disc. The tap is now
closed. Of course one slide alone might be used but I prefer two.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1st. A double slide tap, the slides closing in the middle of, and close to the orifice,
substantially as described.