IMPROVEMENTS IN OR CONNECTED WITH VALVES FOR THE PURPOSE OF PREVENTING THE CHOKING OR STOPPING OF THE SAME BY DEPOSITS OR ACCUMULATIONS WITHIN THE VALVE CASE OR CHAMBER
Year: 1884

page_text: I WILLIAM DEWHIRST CLIFF of Wortley near Leeds in the County of York,
Retort, Firebrick and Tube Manufacturer, do hereby declare the nature of my
said Invention for IMPROVEMENTS IN OR CONNECTED WITH VALVES FOR THE
PURPOSE OF PREVENTING THE CHOKING OR STOPPING OF THE SAME BY DEPOSITS
OR ACCUMULATIONS WITHIN THE VALVE CASE OR CHAMBER and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
My Invention is applicable to valves used in connection with coke ovens, gas
works, tar distilling apparatus or other processes or manufactures in which the
valves used are liable to get stopped up or choked by deposits or accumulations
of any kind within the valve case or chamber.
Hitherto valves of a very cumbrous nature and imperfect action have been used,
and in many cases in conjunction with a water seal; these valves after having
been in use for some time frequently become choked, or stopped up with deposits
or accumulations resulting from the passage of gases and other products through
the same and in places where they are subjected to great heat, the tar deposit is
turned into pitch and consequently the valves stick and are set fast which
necessitates the expenditure of much labour and time to clean and make the same
fit for use again. This causes much trouble and annoyance and interferes with the
proper working of the ovens or other apparatus as the case may be.
This trouble being constant and continuous, my present invention is intended to
obviate all such labour, annoyance and waste of time and consists of a loose cup or
receiver which is capable of ready attachment to and detachment from the bottom
portion of the valve box or casing.
I have represented my invention in the accompanying drawings in which
Figures 1 and 2 are respectively a side and an edge elevation, and Figures 3 and 4
are two vertical sections drawn at right angles to cach other of a rack slide valve
and its box or casing with my improvements applied thereto, and Figura 5 is a
plan of parts drawn on the line 1, 1, of Figure 1. and Figure 6 is a plan of the cup
or receiver separately.

page_text: a represents the valve box or casing, a¹ the valve seat, and 6 the valve which as
shown in the drawing is an ordinary rack slide valve which is operated by a
toothed pinion c taking into a toothed rack 62 formed on its stem b¹-d is the cup
or receiver which according to the arrangement shown in the drawings is provided
with a flange d which is firmly secured to the flange a² at the bottom of the valve
box or casing a by bolts and nuts e whereby it is capable of ready attachment to
and detachment from the valve box or casing a as may be required.
I would here remark that my invention is also applicable to other classes of
valves than that shown in the accompanying drawings and that other means of
readily attaching the cup or receiver d to and detaching it from the valve box or
casing may be employed without departing from the peculiar character of my
invention.
The interior of the valve box or casing a has communication with the cup or
receiver d in such manner that any deposits such as tar in the case of coke ovens,
or dust or any other products resulting from distillation or other processes in which
the improved valve may be used are collected in such cup or receiver d and aro
thereby removed from the working parts of the valve whereby the slide faces of
the valve are freed from impediments.
When this cup or receiver d is filled (or at any other desired time) it can be
readily removed from the valve box or casing and readily replaced by a similar
clean cup or receiver d which can be done in two or three minutes.
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:
The combination with a valve of any suitable construction, of a cup or receiver
capable of ready attachment to and detachment from the valve box or casing
substantially as herein shown and described and for the purpose stated.
Dated the 29th day of November 1884.