Year: 1888

page_text: 1, SEBASTIAN ZIANI DE FERRANTI, of 120 Fellowes Road, Hampstead, in the
County of Middlesex, Electrician, do hereby declare the nature of this invention to
be as follows:-
The object of this invention is to form a non return valve or stop cock in such a
manner that the valve and valve seating can be quickly and readily removed and
replaced by duplicate ones-the non return valve is especially applicable for the
non return valve of the feed pumps used for feeding water to high pressure steain
boilers.
I form a wedge shaped slot entirely across the waterway of the outer shell or body
of the valve or stop cock so as to divide it into two lengths-and these lengths I
connect together by junction pieces at the sides and at the smaller end of the
tapering slot.
Into the tapering slot I insert a corresponding wedge block which has a water way
formed through it-the block is of sufficient depth for a valve seating and valve to
be contained within it. To hold the block in place the smaller end of the block
has a screw rod projecting from it to pass through the junction piece above mentioned
which is at the smaller end of the slot formed across the waterway and a nut is
screwed on to the outer end of this screw rod. To remove the valve and valvo
seating it is only necessary to unscrew this nut and by a slight tap on the end of
the scrow rod loosen the wedge block—it can then be readily withdrawn by a handle
projecting from its broader end. A duplicate wedge block carrying a valve within
may then be at once inserted in its place. Preferably I use a ball valve but other
form of valve might be used.
To ensure a tight joint being formed between the two opposite faces of the wedge
block and the faces of the shell or body which they have to bear against each of
the faces on the two opposite sides of the wedge formed slot in the body is formed
with a ring of soft metal which can be readily faced projecting from it and
surrounding the water passage so that the wedge block fits against these faced
rings

page_text: The outlet end of the shell or body is formed with a right angled bond in it and
a rod is passed through it at the bend so that the end of the rod may come above
the valve and serve to hold it down on to its seat whenever it is required to keep
it closed. The rod is passed through a stuffing box to make a tight joint around
it and has a screw thread on its inner end to screw into a corresponding screw
thread formed in a projection on the inside of the shell or body. A handle is
provided on the outer end of the rod by which it can be turned to screw it backwards
or forwards.
In place of the wedge block being formed with flat sides a tapering circular plug
similarly carrying a valve and valve seat within it might be used.
Dated this 16th day of March 1888

page_text: Improvements in Non Return Valves or Stop COOKB.
I, SEBASTIAN ZIANI DE FERRANTI, of 120 Fellowes Road, Hampstead, in the
County of Middlesex, Electrician, 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 object of this invention is to form a non return valve or stop cock in such a
manner that the valve and valve seating can be quickly and readily removed and
replaced by duplicate ones-the non return valve is especially applicable for the non
return valve of the feed pumps used for feeding water to high pressure steam
boilers.
I form a wedge shaped slot entirely across the waterway of the outer shell or
body of the valve or stop cock so as to divide it into two lengths-and these lengths
I connect together by junction pieces at the sides and at the smaller end of the
tapering slot.
Into the tapering slot 1 insert a corresponding wedge block which has a waterway
formed through it-the block is of sufficient depth for a valve seating and valve to
be contained within it. To hold the block in place the smaller end of the block has
a screw rod projecting from it to pass through the junction piece above mentioned
which is at the smaller end of the slot formed across the waterway and a nut is
screwed on to the outer end of this screw rod. To remove the valve and valve
seating it is only necessary to unscrew this nut and by a slight tap on the end of the
screw rod loosen the wedge block-it can then be readily withdrawn by a handle
projecting from its broader end. A duplicato wedge block carrying a valve within
it may then be at once inserted in its place. Preferably I use a ball valve but other
form of valve might be used.
To ensure a tight joint being formed between the two opposite faces of the wedge
block and the faces of the shell or body which they have to bear against each of the
faces on the two opposite sides of the wedge formed slot in the body is formed
with a ring of soft metal which can be readily faced projecting from it and
surrounding the water passage so that the wedge block fits against these facod
rings.
The outlet end of the shell or body is formed with a right angled bend in it and
a rod is passed through it at the bend so that the end of the rod may come above the
valve and serve to hold it down on to its seat whenever it is required to keep it
closed. The rod is passed through a stuffing box to make a tight joint around it and
has a screw thread on its inner end to screw into a corresponding screw thread
formed in a projection on the inside of the shell or body. A handle is provided
on the outer end of the rod by which it can be turned to screw it backwards or
forwards.
In place of the wedge block being formed with flat sides a tapering circular
plug similarly carrying a valve and valve seat within it might be used.

page_text: Figure 1 of the drawings hereunto annexed is a vertical section and Figure 2 a
front elevation of a non return valvo or stop cock constructed as above described.
A is the outer shell with waterway formed through it-A' is the tapering slot
formed across the waterway--B is the tapering block placed into this slot-CC are
rings of soft metal or other packing held in grooves in the opposite sides or faces of
the slot and passing all around the waterway-B₁ is a handle on the front end of the
block by which the block can be held when withdrawn from the slot in the shell-
B2 is a screw stem projecting from the rear end of the block and passing through
the junction piece which couples together the rear ends of the upper and lower
portions of the outer shell-D is a nut screwing on to the scrow stem and holding
the block in place.
The block is as above explained deep enough for the cavity which is formed in it
to contain the valve seat and the valve. In the drawing a ball valve E is shown but
it might be a valve of other kind. Also as above explained the outlet end of the
water way through the shell is formed with a right angled bend in it and a screw
spindle passes down through a stuffing box at the top of the bend-when screwed
inwards its inner end can be brought against the top of the ball and the ball be
thereby held down against its seat-F is a hand wheel on the outer end of the screw
spindle by which it can be turned.
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
1. A non return valve or stop cock having the valve and its seat contained in a
cavity in a tapering block which is held in a corresponding recess formed across the
waterway of the outer shell so that by withdrawing the block the valve and valve
seating can be at once removed and others substituted for them.
2. Forming such non return valves or stop cocks with grooves in the opposito
faces of the tapering slot passing all around the waterway and holding packing rings
of soft metal or other suitable material.
3. The construction of non return valves or stop cocks substantially as hereinbefore
described.