Improvements in Gear for Hydraulic and other Valves and the like.
Year: 1894

page_text: Date of Application, 6th July, 1894
Complete Specification Left, 4th Apr., 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in Gear for Hydraulic and other Valves and the like.
I, GEORGE BELL SHARPLES, of Victoria Buildings, Manchester, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
It consists of certain improved apparatus by means of which I am able to obtain
an instant automatic reversal or change in a valve or the like from a slow continuous
motion such as is obtainable from hydraulic intensifiers and other slow moving
apparatus.
Upon a suitable centre or standard I pivot a rocking bar or lever, at or about its
centre.
To one or both of the ends of this centrally pivoted lever I suitably connect
the valve or valves or the like it is desired to operate in such a manner that its
motion reverses or changes as desired the valve or valves or the like.
Beside this, upon the same centre, I pivot another rocking bar, to one or both
ends of which I connect suitable connecting rods or other connections from the
slowly moving parts from which its motion is to be derived.
Upon the second rocking bar, above and at equal distances on either side of its
point of rotation I pivot two suitable weighted levers, which are provided with
suitable projections which project over and impinge upon the first rocking bar.
Above each of the two weighted levers is suspended at the requisite height a
catch of suitable shape into which a suitable lug or projection on the weighted
lever takes when the lever is lifted to a sufficient height, retaining the weighted
lever in this position until it is released by a projection formed upon, or attached
to, the second rocking lever pressing the catch off, and allowing it to fall upon the
end of the first weighted lever it is suspended over, thus reversing or changing the
valve or valves or the like as required.
The action is as follows:-
:-
One end of the second rocking lever is slowly raised by its connecting rods
until the weighted lever resting upon it is raised sufficiently bigh to engage in its
retaining catch, the further raising of the second rocking lever presses by means
of the projection before mentioned the retaining catch of the opposite weighted
lever allowing it to fall upon its end of the first rocking lever, instantly reversing
or changing the valve or the like.
The motion being now reversed, the upper end of the second rocking lever
slowly descends leaving its weighted lever in its retaining catch, in which it remains,
until the lower end, having become the higher (after placing its weighted lever in
the retaining catch) by means of the projection before mentioned, presses the catch
of the opposite weighted lever off, allowing it in its turn to fall upon the other
end of the first rocking lever and so again reverses or changes the valve or
the like.
By this means the valve or the like is retained fully open or in operation until
he last moment and then instantly reversed or changed.
Dated this 5th day of July 1894.
JOHN HENRY TOPHAM,
98A Market Street, Manchester, Agent to Applicant.

page_text: Improvements in Gear for Hydraulic and other Valves and the like..
I, GEORGE BELL SHARPLES, of Victoria Buildings, Manchester, in the County
of Lancaster, 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 :—
It consists of certain improved apparatus by means of which I am able to obtain
an instant automatic reversal, or change, in a valve, (or other controlling device,)
from a slow continuous motion, such as is obtainable from hydraulic intensifiers and
other hydraulic apparatus and various other kinds of slow-moving machinery not
actuated by fluid pressure.
Upon a suitable centre or standard I pivot a rocking bar or lever, at or about its
centre. To one or both ends of this centrally pivoted lever I suitably connect the
valve, or valves, or the like, it is desired to operate, in such a manner that its
motion reverses or changes as desired the valve, or valves, and the like.
Beside this, upon the same centre, I pivot another rocking bar, to one or both
ends of which, I connect suitable connecting rods or other connections from the
slowly moving parts, from which its motion is to be derived.
Upon the second rocking bar, above and at equal distances, on either side of its
point of rotation I pivot two suitably weighted levers, which are provided with
suitable projections, which project over and impinge upon the first rocking bar.
Above each of the two weighted levers is suspended at the requisite height, a
catch of suitable shape, into which a suitable projection or lug on the weighted
lever takes, when the lever is lifted to a sufficient height, retaining the weighted
lever in this position, until it is released by a projection, formed upon, or attached
to, the second rocking lever, pressing the catch off, and allowing it to fall, upon that
end of the first rocking lever it is suspended over, thus reversing, or changing, the
valve, or valves, or the like, as required.
Referring to the drawings sent herewith, Figs. 1 and 2 represent side views in
two positions of my apparatus as applied to operate a valve upon a hydraulic
intensifier.
Upon the standard a is pivoted the rocking lever b, connected by link c to the
rod d2 of the valve d.
Pivoted upon the same centre is the second rocking lever e connected at e2 by
connecting rods and g with the moving parts of the intensifier not shown upon
the drawing. Upon this second rocking lever e are pivoted the two weighted
levers h and i provided with projections or lugs which impinge upon first rocking
lever, and projections or lugs k which take into catches and m when the
respective weighted levers and are raised to a sufficient height.
Attached to second rocking lever e is the projection n which pushes the catches /
and m off the projections and i alternately.
The action is as follows:-
One end of the second rocking levere is slowly raised by its connecting rod f
until weighted lever resting upon it by lug j is raised sufficiently high to engage
by lug in its retaining catch as shown in Fig. 1. When at this point, the
projection n has arrived at a position where its further motion pushes off retaining in
allowing weighted lever i to fall into the position shown in Fig. 1 and by impinging
iugj forcing down its end of the first rocking lever b and so changing the valve d
and reversing the motion of the connecting rods fand which causes the upper
end of the second rocking lever e to slowly desceud, leaving its weighted lever h in
retaining catch 1, and raising it into position shown by dotted lines o on the fulcrum
formed by the lug k, until the weighted lever i has in its turn been raised and
placed in retaining catch m when the continued motion of projection n pushes off

page_text: retaining catch allowing weighted lever h to fall in its turn upon its end of first
rocking lever b into position shown in Fig. 2 again reversing the valve and motion,
and so on.
By this means the valve or the like is retained fully open or in operation until
the last moment and then instantly reversed or changed.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The combined apparatus; substantially as described and shown, hereinbefore,
and in the accompanying drawings, for the purposes set forth.
Dated this 3rd day of April 1895.
JOHN HENRY TOPHAM,
98A Market Street, Manchester, Agent to Applicant.
JOHN HENRY TOPHAM,
98A Market Street, Manchester, Agent to Applicant.