Improvement in Valves.
Year: 1895

page_text: Date of Application, 22nd Feb., 1895-Accepted, 17th Aug., 1895
Improvement in Valves.
I, CARL ZANDER, Work Master of Mülfort, in the Province of Rhineland and
Kingdom of Prussia 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 present invention is intended to make it impossible for valves in steam and
water boilers to become stopped up by mud and fur-stone, in the manner such as
has hitherto mostly been observed, the delivery shoulders being subjected to a
mechanical cleaning, which works automatically on the valves being opened.
In the figures of the annexed drawing Figure 1 shows the arrangement of the
invention in a straight and Figure 2 in a crooked shoulder.
In Figure 1 A is the valve-box attached to the delivery-shoulder of the boiler.
The outlet of the valve-box is at B. The valve-box is closed by a cover C provided
with a support and possessing in the centre a perforation closed by a stuffing-box.
Through this perforation a spindle a enters into the valve-box, being screwed to and
fro in the nut forming the crown of the support, and bearing at the upper end the
valve cone, which forms the valve with the valve-seat e.
The valve-cone has at its free end a continuation-piece c of any shape having
distributed on its circumference a number of sharp-pointed pins, teeth and the
like, the length of which is so adjusted, that they can be passed up and down along
the walls of the delivery-shoulders with little play. In this manner c forms a
borer.
The valve is opened or closed by a suitable turning of the spindle a, the cone and
with it the piece d attached to it, following the rotary motion of the spindle; the
teeth thus passing along the walls of the shoulder with a spiral motion, tear away
the mud or fur-stone etc. which is attached to the shoulder, so that it is quite
impossible for the shoulder to become stopped up.
As has been already mentioned, the valve is represented in Fig. 2 in connection
with a crooked shoulder. In this arrangement the cleaning of the delivery-
shoulder is performed by an elastic body, fitting exactly into the bend of the
shoulder; in the drawing this body is formed by the spiral-spring fattached to the
valve-cone, but it may also be made out of any other elastic material capable of
resistence.
It goes without saying that the cleaning mechanism may be very easily attached
to all kinds of valves e.g. to cone-, ball-, bell-valves and the like.
In the kinds of valves shown in the drawing we may remark that having regard
to a simple fixture and working of the borers and simple construction of the whole
apparatus, the position of the valve with reference to the seat was made opposite to
that in the ordinary valves, so that the valve is opened, when it is screwed down,
the tooth at the same time being bored into the delivery-shoulder of the boiler;
but when it is unscrewed, the valve is closed and the borer withdrawn. But the
ordinary arrangement of valve and borers may be retained; the borer however
generally lies free in the interior of the boiler in front of the delivery-shoulder, and
when the valve is unscrewed it penetrates from the inside into the latter.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :
Improvement in valves for boilers of all descriptions, consisting in the arrange-

page_text: ment of borers connected to the valve cone, and receiving on the valve being opened,
a rotary and longitudinal forward motion in the delivery-shoulder of the boiler, for
the purpose of preventing any stoppage in or before the delivery-shoulder.
Dated this 21st day of February 1895.
For CARL ZANDER,
Bernh. Brockhues.