Improvements in and relating to Hydraulic Valves.
Year: 1898

page_text: Date of Application; 11th Jan., 1898
Complete Specification Left, 11th Oct., 1898-Accepted, 23rd 'Dec., 1898
Improvements in and relating to Hydraulic Valves.
I, WALTER KERSHAW, of 21, Bramfield Road, Wandsworth, London, S.W.,
Engineer, do hereby declare the nature of 'this' invention to be as follows:-
My invention' relates to hydraulic valves, applicable for use in connection with
hydraulic lifts or elevators; and for like purposes, and has for its object to ensure
positive and easy operation of the 'valve 'either direct from the pressure main,
or by means of a balance when used in connection with a lift or elevator. My
invention consists of a tapered plug valve which is caused to be operated by
means of gear, driving motion from the usual rope traversing the well of the lift
or elevator through suitable gear operating a bevel wheel provided upon the
extremity of the plug or plug spindle, the plug being operated in one direction or
the other as is required to operate direct from the pressure main or under reduced
pressure by means of an hydraulic balance by the same motion of the rope pulley
and the operation of the rope in the same direction, this being effected by arranging
the bevel wheel upon the plug or plug spindle to be operated by reverse and opposite
bevil pinions freely rotating upon a transversely disposed shaft each being capable
alternately to rotate therewith-by means of an intermediate sliding clutch, so that
thereby a reverse rotation of the plug is permitted by motion of the operating rope
and rope pulley in the same direction.
The plug valve is maintained in close bearing upon its seat by means of a spring
abutment against the cover of the casing; while being further positively main-
tained, but not pressed upon its seat, by means of a fixed stop provided upon the
cover so that thereby the derangement of the valve is precluded.
Spaces are provided upon either side of the valve' plug into which oil is passed
for lubrication; the spaces being' in communication by means of an axial passage
clear of the transverse valve passage. The inlet to the valve from the pressure
main, as also the outlets are arranged in determined positions upon the valve
casing, a back pressure valve being provided so as to operate immediately upon
fall of pressure in the pressure main from any cause. I arrange the exhaust upon
the valve casing immediately opposite to the 'pressure port, while the ports of the
lift and balance are also opposite, but diametrically disposed in relation thereto.
The valve passage is arranged so that its ports are at 45 degrees one with the
other, so that communication can be made from the pressure to the lift port for
operating the lift direct from the pressure main, and on further operation of the
plug communication can be' made from the lift to the exhaust upon the descent of
the lift, while when' the plug is rotated in the opposite direction by the means pre-
viously described, communication is permitted from the pressure port to the
balance port, and by further operation of the plug from the balance to the exhaust
upon the descent of the lift.
It will thus be seen, that while 'the valve is capable of easy operation, and is
maintained upon its seat by the pressure of a spring, it is impossible for it to be
lifted off its 'seat," so that accidents from this cause are precluded in the use of such a

page_text: valve. Further, lubrication is constant while communication from each side of
the plug further ensures equality of pressure, and the maintenance of the valve in
position, even when leakage is permitted from any cause, while the arrangement
of back pressure valve within the casing and the ports as described affords con-
venient inspection of all parts.
In carrying my invention into effect I provide a foundation plate or casting
through which the passages provided communicate with the pressure main, such
passage terminating upon the surface of the foundation plate or casting upon which
the valve casing is provided.
'
The back pressure valve is arranged upon the underside of the valve casing, and
is screwed or fitted into its interior, and the pressure water is thereby permitted
to pass direct through the back pressure valve to the operating valve plug. The
valve plug has provided upon it à spindle integral therewith, such spindle passing
through a gland and having at its extremity a bevel wheel transmitting motion
from the rope pulley as before described.
Dated this 10th day of January 1897.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
Improvements in and relating to Hydraulic Valves.
I, WALTER KERSHAW, of 21, Bramfield Road, Wandsworth, London, S.W.,
Engineer, 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:-
My invention relates to hydraulic valves applicable for use in connection with
hydraulic lifts or elevators and for like purposes, and has for its object to ensure
positive and easy operation of the valve either direct from the pressure main
or by means of a balance when used in connection with a lift or elevator.
In the accompanying drawings,
Figure 1 represents in elevation an hydraulic valve arranged in accordance with
this invention, while,
Figure 2 is an end elevation corresponding thereto and,
Figure 3 is a plan thereof, while,
Figure 4 is a transverse sectional elevation upon the line ab (Figure 1), and,
Figure 5 is a section corresponding to Figure 4 showing modification in which
a liner is employed.
My invention consists, as illustrated in the accompanying drawings, of a tapered
plug valve A which is caused to be operated by means of gear deriving motion from
the usual rope traversing the well of the lift or elevator which operates a bevel
wheel B provided upon the extremity of the plug or plug spindle A: the plug A
being operated in one direction or the other as is required to operate direct from
the pressure main C or under reduced pressure by means of a hydraulic balance
and by the same motion of the rope pulley 1) and the operation of the rope in the
same direction: this being effected by arranging the bevel wheel B upon the plug
or plug spindle A, to be operated by reverse and opposite bevel pinions E F freely
rotating upon a transversely disposed shaft G, each bevel pinion being capable
alternately to rotate therewith by means of an intermediate olutch H so that

page_text: thereby a reverse rotation of the plug A is permitted by motion of the operating
rope and rope pulley D in the same direction.
The plug valve A is maintained in close bearing upon its seat within the valve
casing I by means of a spiral spring J abutting against the cover I' of the casing I
while being further positively maintained but not pressed upon its seat by means
of a fixed stop provided upon the cover I or by means of a bolt 12, (whose position
may be adjusted) so that thereby the derangement of the valve is precluded.
Spaces K L are provided upon each side of the valve plug A (Figure 5) into which
oil is passed for lubrication, the spaces being in communication by means of
an axial passage M in the valve plug clear of the transverse passage N. The
inlet to the valve A from the pressure main C as also the outlets O, P, Q, are
arranged in determined positions upon the valve casing I, a back pressure valve
R being provided so as to operate immediately upon fall of pressure in the pressure
main from any cause. I arrange the exhaust P upon the valve casing immediately
opposite the pressure port C while the ports of the lift and balance respectively
lettered O and Qare also opposite but transversely disposed in relation to the
pressure and exhaust ports. The valve passage N is arranged that its ports are
at 90° one with the other so that communication can be made from the pressure
port C to the lift port O for operating the lift direct from the pressure main and
on further operation of the plug A communication can be made from the lift port O
to exhaust port P upon the descent of the lift (as illustrated in Figure 4), while
when the plug A is rotated in the opposite direction by the movement of the sliding
clutch H to engage with the opposite bevel pinion then communication is per-
mitted from the pressure port C to the balance port Q and by further operation
of the plug from the balance port Q to the exhaust port P upon the descent of
the lift.
It will thus be seen that while the valve A is capable of easy operation and is
maintained upon its seat by the pressure of a spring such as J it is impossible for
it to be lifted off its seat so that accidents from this cause are precluded in the use
of such a valve. Further, lubrication is constant while communication from each
side of the plug further ensures equality of pressure and a maintenance of the
valve in position even when leakage permitted from any cause. The arrange-
ment of a back pressure valve such as R within the casing I and ports as described
affords convenient inspection of all parts.
In carrying the invention into effect I provide a foundation plate or casting S
through which the passage C¹ is provided, which communicates with the pressure
main, such passage terminating upon the surface of the foundation plate or casting
S upon which the valve casing I is provided. A back pressure valve R is arranged
upon the underside of the valve casing I and is screwed or fitted into its interior
and the pressure water is thereby permitted to pass direct through the back
pressure valve through the operating valve plug A. The valve plug A has pro-
vided upon it a spindle integral therewith, such spindle passing through a gland T
and having at its extremity a bevel wheel B transmitting motion from the rope
pulley D by gearing wheels D' D³.
As illustrated in Figure 5, a brass or gun metal lining U may be provided, while
air and drain outlets such as V W respectively may be provided and other details
in construction may be employed without departing from the essential features of
my invention.
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:-
1. An hydraulic valve applicable for use in connection with hydraulic lifts or
elevators, and for like purposes constructed and operating substantially as and for
the purposes herein before described.
2. An hydraulic valve applicable for use in connection with hydraulic lifts or

page_text: elevators and for like purposes consisting of a tapered valve plug to which motion
is communicated by means of gearing and which is rotated in one direction or the
other as required by the movement of a sliding clutch whereby the valve is operated
by the movement of the operating rope and rope pulley in the same direction
substantially as hereinbefore described.
3. An hydraulic valve applicable for use in connection with hydraulic lifts or
elevators or for like purposes constructed substantially as herein before described
with reference to Figures 1 to 4 of the accompanying drawings.
4. An hydraulic valve applicable for use in connection with hydraulic lifts or
elevators or for like purposes constructed substantially as hereinbefore described
with reference to Figure 5 of the drawings.
Dated this 11th day of October 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents: