Improvements in Sluice or Gate Valves for Hot Gases and the like.
Year: 1895

page_text: Date of Application, 14th May, 1895-Accepted, 15th June, 1895
[Communicated from abroad by JOHN THOMAS CHRISTIE, of Troy, New York,
United States of America, Manufacturer.]
Improvements in Sluice or Gate Valves for Hot Gases and the like.
I, HENRY HARRIS LAKE, of the Firin of Haseltine, Lake & Co., Patent
Agents 45 Southampton Buildings, in the County of Middlesex, 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 relates to improvements in sluice or gate valves for hot gasos and
the like and is illustrated in the accompanying drawing in which
Fig. 1 is a central vertical section of my improved valve in an open position.
Fig. 2 18 a similar section taken at right angles to the section-plane of Fig. 1,
showing the valve closed.
A is the valve-case which is provided with the passage A' surrounded by the
usual attaching flanges A* and annular gate-seats A*.
B 18 a circular slide-gate adapted to engage with the seat A' to close the valve
in one direction in the usual manner.
A 18 a pocket in the case adapted to receive the gate when the valve 18
opened.
As the valve-stem screwed into the upper edge of the valve and movable
end wise through the usual stuffing box A*
The slide-gate is made hollow forming an inclosed chamber B' which is divided
into two compartments B and B by the diaphragm B' which connects the opposite
side-walls of the chamber.
The two compartiments communicate with each other through a passage B' at
the lower end of the diaphragm which does not extend to the bottom of the
chamber.
The upper edge-wall of the chamber is provided with two screw-threaded
openings, one in cach compartment.
Each of these openings is provided with a pipe or tube screw-threaded at its
lower end and inserted to form a water-tight joint.
One of these pipes, as C is the inlet pipe leading into the compartment B³ and
the other pipe C is the outlet-pipe adapted to discharge from compartment B'.
Each of these pipes is movable endwise through a pair of stuffing-boxes C³
and C and within a fixed pipe.
The fixed pipe C is adapted to be coupled, as by coupling C with a water-
supply pipe, and the fixed pipe C with a waste-pipe.
The pipes C and C are espectively screwed into the upper stuffing-boxes,
which forms a water-tight connection between the movable members of each set of
telescoping pipes.
The lower stufbing boxes form a gas-tight connection between the movable pipes
and valve-case.
The glands C and C are supported by bolts C' connecting the gland-flauges C³°
with their respective boxes, as shown in Fig. 2.
The upper stuffing-boxes are supported at the proper distance above the lower
boxes by means of the connecting bolts C".
Both ends of each of these bolts are provided with a fixed stop, or annular
flange, as C and screw-threaded.
DOJ

page_text: The lower ends are screwed into threaded apertures in the box-casting and the
upper ends are passed through apertures in the casting of the upper stuffing-boxes
until the upper flanges engage the casting, where they are supported by nuts C".
By providing the supply-pipe with a constant supply of water under pressure, I
am able to maintain, with the apparatus above described, a continuous current of
water through the slide-gate which will absorb and canty away all excess of heat
which would otherwise be retained by the gate when used in connection with hot
gases.
Without some means for absorbing and carrying away the excessive heat,
communicated to the open gates suspended just above the passing hot gases, the
lower edges of the gates are soon burned away and destroyed.
I am thus able to greatly prolong the life and efficiency of the gates
The diaphragm B₁ also serves to strengthen the chamber-walls of the gate,
whereby comparatively thin and light walls are enabled to resist the gas
pressure.
The gate-seat is also protected from the hot gas by circulating water through
the water passage D formed in the casting comprising the valve-case.
The position and duection of this water passage is indicated partly by solid and
partly by dotted lines
D and D' respectively show the inlet and outlet to which the supply and waste
pipes are respectively attached.
Having now particularly described and ascertained the nature of the said
invoution and in what mauner the same is to be performed, as communicated to
me by my foreign correspondent, 1 declare that what I claim is
In a valve, the combination with the valve-case, chambered slide-gate and means
for operating the gate, of inlet and outlet pipes fixed upon the gate in communica-
tion with the gate-chamber, supply and discharge pipes fixed upon the valve-case,
coupling mechanism on the outer ends of the supply and discharge pipes, and
watertight telescoping connections between the inlet and supply pipes and between
the outlet and discharge pipes, substantially as described.
Dated this 14th day of May 1895
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.