Improved Apparatus for Drawing Off Measured Quantities of Liquids.
Year: 1894

page_text: Date of Application, 26th Apr., 1894-Accepted, 23rd June, 1894
COMPLETE SPECIFICATION.
Improved Apparatus for Drawing Off Measured Quantities of
Liquids.
A communication by FRITZ HEINRICH JOHANNES HENCE, of Lübeckerstrasse,
Schwartau, in the Empire of Germany, Brassfounder.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6 Bank Street,
Manchester both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil Engineer, 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 :-
This invention has for its object a draw-off cock for liquids of all kinds, more
particularly for thick liquids such as oil, colours, varnish, syrups, etcetera. The
cock is a so-called flat slide cock, and is arranged in such a way that the vessel to
be filled releases or actuates, by the weight of the liquid admitted, the mechanism
which operates the automatic closing of the cock.
The invention is shown on the accompanying drawings, in which :—
Figure 1 is a plan:
Figure 2, a side elevation when the cock is opened and the closing mechanism
engaged ready for action :
Figure 3, a side elevation at the moment when the automatic closing is to take
place: and
Figure 4, a side elevation of the cock when closed.
The admission pipe a is provided at one end with a screw thread to allow of its
being screwed to anything with which the cock is to be used, and at the other end
with a washer surface, in front of which a tight fitting slide b is movable. The
slide b revolves on a pin attached to the plate of the pipe. A projection b¹
produces, by reason of its conicalness, a tight joint, by engaging behind the plate
of the pipe a when the slide is in a closed condition, and thus not only forms a
limit to the stroke, or movement, but is also in a position to produce as tight a joint
as possible. A lever f is movably arranged on the pin i, which has suitable
washers and lock-nuts for enabling it to be regulated. A weight 9 is arranged
adjustably on the lever f by means of a roller t, this roller being limited as regards
its outer position by the insertion of a cross pin h. The lever is limited in its
movement by means of a pin d attached to the plate of the pipe. The washers and
nut k and l arranged on allow of the regulation of the pressure exerted on the
slide b, whilst m serves for adjusting the hinge of the lever f. The slide b has a
stud c on which the pair of arms or levers q and p, which are connected by a hinge
or pivot, revolve. The arm q carries, by means of a hinge or pivots, the actual
book or suspending device r, which has at one end a hook and at the other end an
eye or loop.
-
Figure 2 shows the cock when in an open position, the vessel u being ready to
receive the liquid flowing out of the cock. The slide 6 is limited in its outermost
position by a pin r. The weight g is at its extreme outward position at h in
consequence of the inclined position of the lever f, whilst, at the other end of the
lever, the hook hangs on a projection. If the vessel u be then filled with the
liquid which is being drawn off, it will gradually descend, and, when it has received
a certain quantity of the liquid, will be in a position to bring the lever finto the
position shown in Figure 3, whereby the weight g automatically rolls up to
he contact pin d, so that the long end of the lever fis unloaded. This unloading
allows the vessel u to slip the hook off the projection or stud of the lever ƒ, and

page_text: g
consequently, by means of the hinged arms 9 and p, the slide is drawn downwards
by its stud (Figure 4) so that the cock is closed. According as the weight 9 in
its end position is approached to, or removed from, the point of rotation of the
lever f, the cock will be earlier or later closed according to whether there is a
greater or less quantity of liquid to be run into u. It is thus possible to regulate
at will the amount to be drawn off, and the certainty is afforded that, when a given
quantity is in the vessel, which receives the liquid, the cock will be automatically
closed. This closing is operated merely by the quantity drawn off so that it is
impossible for the mechanism not to work.
The draw off cock forming the object of this invention is very suitable, owing to
its simple construction, for use in the most varied branches of industry, preferably
in the case of thick liquids which flow very slowly, the cock will shut automatically
when a given quantity has been drawn off, so that any escape or overflow from the
vessel into which the liquid is drawn, can no longer take place. As the weight g
in its end position can act on a lever arm of variable length, and as shortly before
the closing of the cock the lever fis unloaded by the rolling forward of the weight,
the slipping off of the hook from the stud or projection of the lever f must take
place in all cases, so that any cessation of working of the draw-off cock is entirely
prevented.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. A self-closing draw-off cock characterised by the receiving vessel being
connected with the closing device of the cock, in such a way that the suspended
vessel is released at a given weight, and produces by its own weight the automatic
closing of the discharge opening, substantially as described and shown.
2. A self-closing draw-off cock consisting of a shutting-off slide 6 in combination
with a leverf having a movable weight g and a projection f', a hook r having an
eye by which it may be suspended to the said projection, and hinged arms or
levers P
and q connecting the said hook with the slide b substantially as and for the
purposes described and shown.
Dated this 25th day of April 1894.
WM. P. THOMPSON & Co.,
Agents.