Year: 1886

page_text: Date of Application, 9th Mar., 1886.
Complete Left, 9th Dec., 1886.
Complete Accepted, 11th Jan., 1887.
We FRANCIS SANDERS MORRIS and EDWARD FIELD, both of Chandos Chambers,
Buckingham Street, in the city of Westminster, Civil Engineers do hereby declare
the nature of this invention to be as follows:
This invention has for object to provide an improved combined draw-off and safety-
valve cock constructed to blow-off at any desired pressure and at the same time to act
as an ordinary draw-off or common supply cock.
In carrying out our invention we employ a valve and spindle of suitable form and
kept to its seating by means of a spring and adapted to be partly rotated upon its
seat without leaving it whereby a tendency to always keep the valve tight is secured.
A suitable arrangement whereby we are enabled to partly rotate the valve upon its
seat is to provide either the spindle or handle with a projecting pin or lug so arranged
as to gear with a curved slot or recess inside the upper part of the cap or top of the
cock, and it will be readily understood that clearance is allowed enabling the valve to
move some distance on its seating to the right or left without leaving it.
"
The valve has an extended cored out shank or thimble, and in this thimble we place
the spring around the spindle which latter is pinned or otherwise secured to the
bottom of the valve-thimble so that they may turn and lift together; a little "play"
vertically is provided enabling the spindle to move slightly upwards without raising
the thimble and valve from its seat, it being found advisable in practice to give full
movement to the valve.
We make a groove in that part of the body of the cock forming the guide for the
thimble, this groove surrounds the outside of the thimble and has a channel in
connection with the bib or outlet of the cock; it will be clear that any leakage
(when the valve is open) past the lower end of the thimble must be effectually
checked by the aforementioned groove and liquor or the like reaching the groove is
conducted away by the channel.
Sometimes we arrange our spring above or outside the thimble employing the
same groove and method of securing part rotation of the valve upon its seat
substantially as described above.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.

page_text: We, FRANCIS SANDERS MORRIS and EDWARD FIELD, both of Chandos Chambers,
Buckingham Street, in the City of Westminster, Civil Engineers, 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 :-
This invention has for object to provide an improved combined draw-off and safety-
valve cock constructed to blow off at any desired pressure and at the same time to act
as an ordinary draw-off or common supply cock.
In carrying out our invention we employ a valve and spindle of suitable form and
kept to its seating by means of a spring and adapted to be partly rotated upon its seat
without leaving it whereby a tendency to always keep the valve tight is secured..
A suitable arrangement whereby we are enabled to partly rotate the valve upon its
seat is to provide either the spindle or handle with a projecting pin, swell or lug, so
arranged as to gear with or ride over a curved slot, recess or cam inside or on the
upper part of the cap or top of the cock, and it will be readily understood that
clearance is allowed enabling the valve to move some distance on its seating to the
right or left without leaving it.
The valve has an extended cored out shank or thimble, and in this thimble we place
the spring around the spindle which latter is pinned or otherwise secured to the
bottom of the valve-thimble so that they may turn and lift together; a little "play"
vertically is provided enabling the spindle to move slightly upwards without raising
the thimble and valve from its seat, it being found advisable in practice to give free
movement to the valve.
We make a groove in that part of the body of the cock forming the guide for the
thimble, this groove surrounds the outside of the thimble and has a channel in
connection with the bib or outlet of the cock.
In order to enable our invention to be fully understood we will proceed to describe
the same by reference to the accompanying drawing in which figure 1 is a plan and
figure 2 a front view of a draw-off and safety valve cock constructed according to
our invention; figure 3 is a longitudinal section of the same with the handle removed.
Similar letters in all the figures represent similar parts.
a, represents the valve, b, the seating and c, the spindle of the same; d, is the
spring for keeping the valve a, on its seating b, except when raised by being partially
rotated; e,
is the handle of the cock and is the swell or projection thereon, the
handle being fixed on a square i, on the spindle c, of the valve by means of a screwj;
is the cam surface which we provide on the upper part of the cap or top h, of the
cock, over which cam surface the swell or projection, commences to ride when the
handle e, has been rotated to a certain extent whereby the valve a, is allowed to
rotate on its seating b, some distance to the right or left without leaving it; k, is the
extended cored-out shank or thimble of the valve a, in which shank or thimble the
spring d, is placed around the spindle c; 1, is the pin whereby the spindle c, is secured
to the bottom of the valve thimble k, in order that they may turn and lift together;
the pin 1, passes through a slot m, in the spindle whereby a little vertical play is

page_text: allowed for the spindle without raising the valve a, from its seat b, for the purpose
hereinbefore referred to; n, is the groove which we make in the part o, of the body
of the cock forming the guide for the thimble ; p, is the channel forming a
connection between the groove n, surrounding the thimble k, and the bib or outlet q,
of the cock.
By this construction if the pressure in the boiler or other vessel to which our
improved cock is applied exceed a certain degree, the steam or the like from the
vessel will raise the valve a, from its seating b, and compress the spring d, between
the cap h, of the cock and the bottom of the thimble k, the valve remaining open so
long as the said pressure continues; when however it decreases, the valve will be
caused by the spring d, to resume its closed position, our improved cock thus acting
as a safety valve cock. When it is required to draw off liquor or the like from the
said vessel, the handle e, of the cock being in the position shewn in figure 2 it is
partially rotated when it will first cause the valve a, to rotate on its seating for some
distance and the swell or projection, on the handle e, then riding over the cam
surface g, will raise the spindle c, and with it the valve a, from its seating b.
It will be clear that any leakage (when the valve is open) past the lower end of the
thimble, must be effectually checked by the groove n, and fluid or the like'reaching
the grooven,
is conducted away by the channel p.
Sometimes we arrange our spring d, above or outside the thimble k, employing the
same groove n, and method of securing part rotation of the valve a, upon its seat b,
substantially as described above.
.
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 :—
1. A combined draw-off and safety valve cock such as that herein described having
a valve provided with an extended cored-out shank or thimble substantially as and for
the purposes herein before described.
2. Providing a combined draw-off and safety-valve cock such as that herein
described with a groove surrounding the outside of the thimble in which work the
valve spindle and spring, a channel being formed which connects the said groove
with the bib or outlet of the cock substantially as hereinbefore described and
represented in figure 3 of the accompanying drawing.
3. The improved draw-off and safety-valve cock hereinbefore described and
represented in the accompanying drawing.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicants.