IMPROVEMENTS IN VALVE COCKS
Year: 1884

page_text: JOHN MCKELLAR Ligoniel Belfast County of Antrim Ireland Engineer do hereby
declare the nature of my invention for IMPROVEMENTS IN VALVE COCKS to be as
follows:-
First, in forming a straight way through valve cocks by making the stop valve
in the form of a cone to bear upon two faces, one above the straight way, and the
other below it.
When the conical plug valve is drawn up the way is straight from branch to
branch. When it is shut down upon both faces the way is closed tight.
And second I make the covers of valve cocks self packing by the steam, or gas,
or fluid inside the valve cock.
The closing & opening wheel in turning remains at the same height from the
valve cock cover. There is a socket at the valve end of the spindle into which is
fitted a stationery nut. An end is made on the top of the valve and screwed to fit
the nut. The valve is kept from turning by a stud on one side fitting a guide pro-
jection on the side of the valve chest. By turning the hand wheel the valve is
raised or lowered. The top end of the socket on the spindle is made to bear
against the brass bushing of the gland & is made steam tight. The under side of
the same bears against a brass facing which is fitted on the under side of the cover
The gland bushing is made a good fit for the spindle, which turns easily and, is
tight to steam, without packing of any kind.
The pressure of steam or fluid or gas inside the valve chest will press against the
under side of the flange on the top of the socket and keep the face of the bearing
ring on the flange against the under side of the gland bush.
This will prevent any escape of steam, gas, or fluid through the gland on the
cover of any stop valve cock, check valve or feed valve.

page_text: COMPLETE SPECIFICATION,
.
JOHN MCKELLAR Ligoniel Belfast County of Antrim Ireland Engineer do hereby
declare the nature of my invention for IMPROVEMENTS IN VALVE COCKS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
In figure 1-A is the casing of a valve cock, B is the cover screwed into the
casing and bored an easy fit for the spindle E and faced on the under sido for the
bearing face E': C, C'.& D are hand wheel & loose collar & nut: F is a nut fitted
to the socket end of the spindle E: G is top of the valve G³ chased to work in the
nut F: H is a stud projecting from the side of the valve G: H¹ is a guide cast in
side of the casing A.
Figure 2 is drawing of straightway plug valve. A is the casing. B is the cover
bored & faced for E & E¹. .C C¹ & D are wheel & loose collar & nut. E is spindle
with a chased end and valve face at E'. F is a hollow conical plug valve with two
seats at G G H is a stud projection and H¹ guide cast in side of casing A-the
plug valve is chased to receive end of spindle E.
1
The action of the valve in fig 1 is as follows. When the hand wheel C and
spindle E are turned the nut F draws the valve C¹ up off its seat by the screwed
top G. The valve G¹ is kept from turning round by the projecting stud H and
guide H¹. The valve spindle E and face E₁ remain at the same height and the top
face E¹ of the socket on the spindle bears on the under side of the cover B making
the upper end of the spindle E self packing. The pressure of fluid gas or steam
inside the valve casing presses the face E' against the under side of the cover B.
Reversing the direction of hand wheel in turning same will close the valve & leave
the face El bearing tight against the cover B.
In figure 2 the action is similar when the hand wheel & spindle are turned in
opening the straightway passage through the valve casing A, the screwed end of
the spindle E raises the plug valve F by passing into the hollow chamber K in
plug valve the valve face at E¹ on the spindle E bears upon the shoulder B on the
cover and the pressure of fluid, gas, or steam inside the casing presses the spindle
upwards: the projection H and guide H prevent the valve F turning round with
the turning movement of wheel in opening or closing the valve.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to bo performed I declare what
I claim is
1. The raising or lowering a valve or plug in stop valves and cocks by means of
a hollow chambered spindle and nut griping projecting end above the valve; or by
a screwed spindle passing into a chambered plug which can be drawn up or let
down by turning spindle without altering the height of said spindle.
2. Forming the spindle with a bearing face against the under side of valve
covers to prevent leakage of steam gas or fluid reaching the upper part of valve
spindle in cover & gland.

page_text: 3. Preventing the valve or plug turning round when spindle is moved in either
direction by a projecting stud on valve griping guide bracket cast on the outer
casing.
4. Providing a straight way through valve cocks by forming the stop valve of
a hollow cone with bearings above & below the level of straightway.