Interlocking Gear for the Levers of Hydraulic Working Valves for Gun Mountings.
Year: 1887

page_text: Date of Application, 6th Jan., 1887
Complete Left, 24th Sept., 1887
Complete Accepted, 25th Oct., 1887
Interlocking Gear for the Levers of Hydraulic Working Valves for
Gun Mountings.
I, ANDREW NOBLE, late Captain in the Royal Artillery, of Jesmonddene House,
Newcastle upon Tyne, a Companion of the Bath, Manufacturing Engineer, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to provide that in the case of two hydraulic working
valves it shall only be possible to work one at a time.
This I arrange for by fitting each of the two hand levers, by which the hydraulic valves
are actuated, with a spring drop catch to drop into a central notch in a fixed quadrant,
and in addition I provide a second quadrant pivotted at one end to a rocking lever-
one pivotted quadrant to one end of the lever and the other to the opposite end.
The spring drop catches are coupled to the pivotted quadrants in such a manner
that when the spring drop catch of either lever is withdrawn from the notch in the
fixed quadrant it draws up the pivotted quadrant belonging to that lever, into line
with the fixed quadrant. The links and the rocking lever have play enough to allow
one pivotted quadrant to be so drawn up, but not enough to allow both to be up at the
same time.
When either of the pivotted quadrants is drawn up in this manner, movenient can
be made with the hand lever to which it is attached. While the hand lever is moved
out of its central, or stop position, the pivotted quadrant cannot get down again
because there is only one notch in the fixed quadrant into which the spring drop catch
can fall.
By this arrangement it will be seen that as only one catch can be raised at the same
time, it is not possible to even commence the movement of the second hand lever until
the first hand lever is put back again into its central, or stop position with its spring
drop catch down.
1000

page_text: COMPLETE SPECIFICATION.
Interlocking Gear for the Levers of Hydraulic Working Valves for
Gun Mountings.
1, ANDREW NOBLE, late Captain in the Royal Artillery, of Jesmonddene House,
Newcastle upon Tyne, a Companion of the Bath, Manufacturing 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:
The object of this invention is to provide that in the case of two hydraulic working
valves it shall only be possible to work one at a time.
This I arrange for by fitting each of the two hand lovers, by which the hydraulic
valves are actuated, with a spring drop catch to drop into a central notch in a fixed
quadrant, and in addition I provide a second quadrant pivotted at one end and linked
at the other end to a rocking lever-one pivotted quadrant to one end of the lever and
the other to the opposite end.
The spring drop catches are coupled to the pivotted quadrants in such a manner
that when the spring drop catch of either lever is withdrawn from the notch in the
fixed quadrant it draws up the pivotted quadrant belonging to that lever, into line with
the fixed quadrant. The links and the rocking lever have play enough to allow one
pivotted quadrant to be so drawn up, but not enough to allow both to be up at the
same time.
When either of the pivotted quadrants is drawn up in this manner, movement can
be made with the hand lever to which it is attached. While the hand lever is moved
out of its central or stop position, the pivotted quadrant cannot get down again
because there is only one notch in the fixed quadrant into which the spring drop
catch can fall.
By this arrangement it will be seen that as only one catch can be raised at the same
time, it is not possible to even commence the movement of the second hand lever until
the first hand lever is put back again into its central or stop position with its spring
drop catch down.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a front elevation and Figure 2 is a side elevation of a pair of hydraulic
valves with their gear arranged in accordance with my invention.
a and a¹ are the casings in which a pair of slide valves are contained; one of these
valves may serve to pass water under pressure to and from an hydraulic cylinder
which effects the rotation of the breech block of the gun in order to lock and unlock

page_text: C
b and b¹
and d¹
which withdraws and replaces the breech block or the cylinders in connection with
these valves may perform other work about the gun of such a nature that it is
essential that one of the valves should be closed whilst the other is open.
are the valve rods, they are connected by links with hand levers c and c¹.
are sliding pieces on the hand levers serving as locking bolts. The sliding pieces at
their lower ends are connected with the levers by studs e and el fixed into the lovers
and passing through slotted boles in the sliding pieces. At their upper ends the
sliding pieces embrace the levers between jaws d* dx formed upon them. To the
jaws d stems fare fixed, they pass up through guides c* c* on the hand lovers and coiled
springs surround them and press the sliding picces downwards towards the fixed
quadrants, or ares g, gl, on the frame. There is a notch in the upper edge of each are
and a tooth on each sliding piece which drops into the notch when the lever reaches
its central position. and are bolt levers on the handles ce¹ they are connected by
links with the sliding pieces d d¹ and raise them for the purpose of unlocking the
levers. The sliding pieces d d also embrace quadrant levers and and each of
these is pivoted at x to the frame. Thus when either hand lover is unbolted the
corresponding quadrant lever is raised turning about its pivot. The quadrant lever i
is connected by a pair of links k k with one end of a rocking lever and the other end
of the same lever is similarly connected with the quadrant lever i except that the
links are slotted at their lower ends. Hence when the hand lever c is unlocked
the rocking lever is moved by the action of the quadrant lever but when the hand
lever c is unlocked although the quadrant lever moves the rocking lever is not
moved in consequence of the play allowed by the slots provided in the links ¹. But
when the lever c¹ is unlocked the links k prevent movement of the rocking lever / and
consequently prevent the unlocking of the hand lever c. Similarly when the rocking
lever has been moved by the unlocking of the hand lever c the hand lever c¹ cannot
be unlocked for its quadrant lever is now held down by the links k¹.
l
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. The combination substantially as described consisting of the hand levers c'c¹
operating a pair of hydraulic valves; the quadrant levers which are raised when
the hand levers are unbolted; and parts connecting the said quadrant levers so that
both cannot be raised simultaneously.
2. The arrangement substantially as described and illustrated by the annexed
drawings of interlocking gear for the levers of hydraulic working valves for gun
mountings.