Year: 1886

page_text: I, CHARLES HENRY MURRAY of Elswick Works Newcastle-upon-Tyne Engineer
do hereby declare the nature of this invention to be as follows:-
This invention has for its object improved gear for guns fitted with hydraulic
running in and out cylinders.
When a gun fitted with hydraulic running in and out cylinders is mounted on a
front pivotted slide it is not easy to make the movement of the gun act upon the valve
used for passing the pressure water to and from the running in and out cylinder,
owing to the varying position of this cylinder in relation to the said valve. I therefore
introduce additional valve apparatus on the pipe which leads the water to and from the
rear end of the running in and out cylinder.
This consists in a double throttle valve so made that the water going to the cylinder
tends to shut one valve, and lifts and passes the other, while on passing back from
the cylinder the water lifts and passes the first valve and tends to close the last one.
A coiled spring is applied to each of these valves to hold it to its seat when required
and the two springs are connected with a lever one on either side of the fulcrum of
the lever.
The lever of the double throttle valve when in its central or normal position holds
these two helical springs one resting lightly on each valve.
In this position the water is free to pass to or from the cylinder by one or other.
of the valves.
It will be seen there is one valve to be throttled to check the running out of the
gun and one to be throttled to check the running in of the gun.
The throttling action is thus performed.
There is a tappet bar carried upon the gun slide below the gun carriage; it is
provided with a tappet at each end and made free to slide in its supports.

page_text: This tappet bar is attached freely to the lever of the double throttle valve and it
drives the lever to the extreme of its stroke as the gun finishes the last part of its
movement either when running in or out.
When the tappet rod, set in motion by the carriage thus moves the lever it compresses
one or other of the springs, bringing a gradually increasing pressure upon the valve
by which the water is passing and as the action continues, finally the water is so
throttled that the carriage comes gently to rest.
The springs 1 make of different strengths, the one for the valve through which the
pressure water must pass is made strong enough to hold the valve closed against the
highest pressure, while the spring which acts on the water on its way from the rear
end of the running in and out cylinder needs only to be a light one as the water is
then only exhausting and is at a low pressure.
Dated this 18th day of October 1886
CARPMAEL & Co.,
Agents for the Applicant.
Improved Gear for Guns Fitted with Hydraulic Running in and out
Cylinders.
I, CHARLES HENRY MURRAY, of Elswick Works, Newcastle-upon-Tyne, 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:
This invention has for its object improved gear for guns fitted with hydraulic
running in and out cylinders.
When a gun fitted with hydraulic running in and out cylinders is mounted on a
front pivoted slide it is not easy to make the movement of the gun act upon the valve
used for passing the pressure water to and from the running in and out cylinder,
owing to the varying position of this cylinder in relation to the said valve.
I therefore introduce additional valve apparatus on the pipe which leads
liquid to and from the rear end of the running in and out cylinder and I arrest the
running out of the gun by throttling the passage of liquid under pressure through
this pipe to the rear end of the cylinder and similarly arrest the running in of the gun
by throttling the exhaust of liquid through this pipe.

page_text: The mechanism by which L effect, this is shown in the drawings annexed.
Figure 1 is an elevation partly in section of a gun and carriage mounted on a front
pivoted slide and provided with an hydraulic running in and out cylinder.
Figure 2 is a plan of the slide and carriage with the gun removed.
Figure 3 is a section to a larger scale of a part of the apparatus.
a is the gun, is the carriage, is the the slide, d is the hydraulic running in and
out cylinder; it is fixed upon the slide and has working with it a piston d¹ the piston
rod of which is attached to the carriage b. When the gun is fired the recoil is
controlled in the ordinary manner by allowing liquid to escape from the rear end of
the cylinder past spring relief valves X into a tank Y which is large enough to contain
the liquid till it has tinie to flow away by a waste pipe. At the same time a valve in the
piston allows water to pass to fill the annular space in front of the piston as is usual-
e is a pipe by which liquid is passed into and from the rear end of the cylinder d to
work the gun and e¹ is a pipe by which liquid under pressure is admitted to or
allowed to pass from the front end of the cylinder-both pipes are as shown at
Figure 2 led to the pivot of the slide and from thence they are connected to the
ordinary slide valve used for controlling the admission of liquid under pressure either
to the one pipe or the other this valve is not shown in the drawing.
When the valve is shifted into such a position that liquid under pressure is admitted
to the pipe e and allowed to pass away from the pipe e the gun is run in but when
the valve is shifted into a position to admit water under pressure to the pipe e the gun
is run out.
As it would be difficult to arrange for the gun in its movements to control this
valve so as at the proper time to arrest the running in or out movement I as before
stated introduce additional valve apparatus on the pipe e.
This additional valve apparatus is shown separately on a larger scale at Figure 3.
It is composed of a pair of throttle valves so arranged that the water going to the
cylinder tends to shut one valve fand lifts and passes the other g while on passing
back from the cylinder the water lifts and passes the first valve and tends to close
the last one g.
A coiled spring his applied to each of these valves to hold it to its seat when
required and the two springs are connected with a lever i one on either side of the
fulcrum of the lever.
The lever of the double throttle valve when in its central or normal position holds
these two helical springs one resting lightly on each valve.
In this position the water is free to pass to or from the cylinder by one or other
of the valves.
It will be seen there is one valve to be throttled to check the running out of the
gun and one to be throttled to check the running in of the gun.
The throttling action is thus performed.
There is a tappet bar & carried upon the gun slide below the gun carriage; it is
provided with a tappet k¹ at each end and made free to slide in its supports.
This tappet bar is attached freely to the lever i of the double throttle valve.
On the carriage is a projection 6 which as the carriage completes its running
in or out movement strikes against one or other of the tappets k' and moves the bar k
end wise.
This movement of the bar turns the lever i in one or other direction as the gun
finishes the last part of its movement either when running in or out.
When the tappet rod set in motion by the carriage thus moves the lever i, it
compresses one or other of the springs & bringing a gradually increasing pressure
upon the valve for g by which the water is passing and as the action continues
finally the water is so throttled that the carriage comes gently to rest.
The springs I make of different strengths, the one for the valve g through which
the pressure water must pass to run the gun out is made strong enough to hold the
valve closed, against the highest pressure used, while the spring which acts on the
water on its way from the rear end of the running in and out cylinder needs only
to be a light one as the water is then only exhausting and is at a low pressure."

page_text: 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. Providing on the gun slide additional valve apparatus in connection with the
running in and out cylinder and so arranged that independently of the main valve
the gun in its movements may throttle the passage for the liquids to and from the
cylinder.
2. The combination of the gun slide e turning on a horizontal pivot at its front end
the carriage the running in and out cylinder d-pipes ee for admitting liquid to
or allowing it to pass from the rear and front ends of this cylinder and valve
mechanism for arresting at the proper time the running in or out of the gun by then
throttling and arresting the passage of liquid through the pipe e substantially as
described.
b
3. The combination of the gun slide c turning on a horizontal pivot at its front end
the carriage the running in and out cylinder d pipes e e' for admitting liquid to or
allowing it to pass from the rear and front ends of this cylinder, valves and g for
controlling the passage of liquid in either direction through pipe e, springs h, lever i,
tappets k, on tappet bar k, and projection 6' on carriage to strike against these
tappets substantially as described.