Year: 1887

page_text: Date of Application, 13th May, 1887
Specification Accepted, 5th July, 1887
We, JOHANNES FLEISCHER and CARL MÜHLICH, of the firm of Fleischer and Mühlich,
manufacturers of hardware in Frankfurt on the Main, Germany 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:―
The valve shown in sectional elevation is intended for closing off vessels containing
liquid carbonic acid.
The valve is secured to the top plate G of the vessel by means of screws or
otherwise; it is composed of a lower part F, parts D, A and plug E. The number of
the parts D A may be more than two according to the pressure of the acid.
The lower part F contains the valve seat with valve cone S, the inlet f, the outlet f¹
and a stuffing box e, and need not be further described.
The valve cone S is provided with a threaded spindle s passing through the stuffing
box e and screwing into the cone C of the part D. A wedge 3 applied in the stuffing
box e engages in a groove of the spindle s and prevents the latter from turning.
The cone of the part C acts as a plug and is ground in the part D. For producing
a further tightness, the plug C is surrounded with any suitable packing v', which is
held by the rings ddf of which one is for tightening and the other for setting the
tightened ring.
Upon the upper part of C, which is slotted at 2, are rings a¹, c and c¹ placed in an
annular space 1. The ring a¹ is ground and is held by the ring c, whilst the ring c¹
acts as a lock nut.
The part A is arranged in the same manner as the part D and is provided with a cone B,
packing v, rings d d¹ and rings a, b b let into the annular portion 5 of A, and which
act exactly as the corresponding parts of C. The cone B which is ground in A and
acts as a plug, engages over the upper end of C, so that its pins 6, 6 come into the
slot 2, fig. 2, whereby a simultaneous rotation of the lower cone with the upper
cone B is obtained. The end 4 of the part B is so shaped that it can be worked by a
key. E is a plug for closing the whole device. Instead of the slot 2 and pins 6, 6 a
square or such like might be used.
Should it happen that the valve is not tight, the pressure of the acid drives the
cones C, B against their seats, (the rings d' d tightening the said cones) and producing
an absolute tightness.

page_text: Owing to the fact that when the cones B, C are being turned, a displacement thereof
(resulting from the arrangement and employment of the lock nuts) is absolutely
impossible, a perfectly tight closing is obtained. ;
By combining the valve F with one or more parts A, D, the compound valve can be
employed for very high pressures; on the other hand, by applying additional
parts A, D, existing valves can be rendered suitable for higher pressures.
Operation. The object of the described device is to prevent any escape towards the
top of liquid carbonic acid under pressure in the vessel, when the valve is open to the
outlet. This is prevented by the two ground cones B and C as well as by the ground
rings a, a, and by the upper cone B being always in the same position; that is to say
the cone S remains tight when lifted or raised, it being loosely connected with the
cone B by the pins 6 passing through the slot of C, so that when C is rotated in one
direction or the other, the spindle s, the rotation of which is prevented by the wedge 3,
is raised or lowered and the valve opened or closed, the said spindle s being prevented
by the groove of the wedges, from turning with C. It is evident that the cone S must
be properly adjusted before the part D is put in place and secured.
In order to obtain a still better tightness, the under portion of the cone C, fig. 3, as
well as the opening in D are conical and that a cone P is employed, having a double
taper. The cone P can be made of metal, hard rubber or other material and is ground
both upon the lower cone of C as in the conical hole of D; the said cone P can be
secured by a threaded ring and be adjusted.
The same tightness can also be applied to the remaining parts B and A. The spindle
is prevented from turning by a pin or wedge t located in a groove of the said spindle.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is:-
First. In valves, the employment of a ground cone C which, conjointly with a
cone S acts to produce a double metallic tightness, in such a manner that both in the
open and closed position, the valve remains absolutely tight under a pressure attaining
300 atmospheres.
Second. In valves for liquid carbonic acid, the employment of a two tapered plug P
fig. 3, made of metal or other appropriate material, the same being ground on to the
lower tapor of the cone C and also in the conical hole of the part D, and being held by
a threaded ring and rendered adjustable.
Third. The employment of one or more parts D A which are arranged as shown in
fig. 1 and 3 respectively and the separate ground cones of which are so connected to
each other and with the cone of the threaded spindle S, that they rotate together in one
or the other direction and thereby raise or lower the cone S of the spindle and open or
close the valve.
Dated this 10th
1007
BRANDON & SON,
Agents for Applicants.