An Improved Working Valve for Presses and other Machines Actuated by both High and Low Hydraulic Pressures.
Year: 1894

page_text: Date of Application, 26th Apr., 1894
Complete Specification Left, 26th Jan., 1895-Accepted, 2nd Mar., 1895
PROVISIONAL SPECIFICATION.
An Improved Working Valve for Presses and other Machines
Actuated by both High and Low Hydraulic Pressures.
I WILLIAM MORRIS JEFFERSON, of 2 Newland Avenue, Hull in the County
of York, Engineer, do hereby declare the nature of this invention, to be as
follows:-
The object of my invention is to construct a stop valve for hydraulic high
pressure and low pressure accumulators which shall work automatically and
prevent the operator putting on the high pressure accumulator before the proper
time, thus obviating the loss of liquid, preventing accidents to presses and the
like, and also allowing of a longer nip being given to oil cake presses.
For the purpose of my invention I employ a suitable casting of brass, steel or
the like metal, the centre for the low pressure spindle being bored out as
heretofore.
I form a boss upon the casting in any suitable position, either horizontally,
vertically or diagonally; through this boss I bore a hole perfectly true, to
receive an automatic piston and high pressure valve.
The said piston is constructed with a suitable head preferably enlarged, on the
face of which is fixed a leather or the like packing, the rod of this. piston forming a
piston also, with a leather covering on its end or face; also in the said hule I
employ a second loose valve which is formed with a mushroom head, having
seat underneath, the tail of the valve has one or more flats or grooves upon
it, this valve being actuated by the low pressure valve.
The hole in the boss is reduced for some distance, in about the centre, and in the
middle of the reduced part, 1 enlarge the hole to form a chamber into which
the ends of the loose valves work, the oil or the like passes from the high pressure
accumulator through the flats or grooves on the tail of the second loose valve, to
this chamber, from whence it passes out on to the low pressure check valve to the
press.
ง
Within the hole in the boss I employ preferably screw plugs for the purpose of
regulating the travel of the valves, also. for preventing the escape of the liquid,
and at the same time allowing easy access to the valves for repairs and the like.
_ Dated this Twenty-fourth day of Anril 1894.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Working Valve for Presses and other Machines
Actuated by both High and Low Hydraulic Pressures.
I WILLIAM MORRIS JEFFERSON, of 2 Newland Avenue, Hull, in the County
of York, 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 my invention is to construct a stop valve for hydraulic high,

page_text: pressure and low pressure accumulators which shall work automatically and
prevent the operator putting on the high pressure accumulator before the proper
time, thus obviating the loss of liquid, preventing accidents to presses and the like,
and also allowing of a long nip being given to oil cake presses in particular.
DESCRIPTION OF DRAWINGS.
Fig. 1 shows plan of stop valve with my improvements shown in dotted lines.
Fig. 2. is a sectional view through A' B¹ Fig. 1.
Fig. 3. is a sectional view through C₁D Fig. 1. .
Fig. 4. shows plan of double stop valve.
For the purpose of my invention I employ a suitable casting of brass, steel or
the like metal A, the centre B for the low pressure valves being bored out as
heretofore. I form a boss C upon the casting in any suitable position, either
horizontal, vertical or diagonal, through this boss C I bore a hole D, perfectly
true, to receive an automatic piston E and high pressure valve F. The said
piston E is constructed with a suitable head on the face of which is a leather or
the like packing G held in position by a washer and nut, the rod of this piston
forming a small piston H, also with a leather covering J on its end or face, held
in position by a washer aud nut also in the said hole I employ a second loose
valve F which is the high pressure valve, and which is formed with a mushroom
head K, having seat L underneath, the tail of the valve having one or more
flats or grooves in it, this valve being actuated by the low pressure valve or
piston E.
The aforesaid hole in the boss is reduced for some distance about the centre to
form a chamber M in which the rod H of the valve or piston E works, and is
reduced again at N to receive the tail of the valve F.
I drill a hole O from hole O' in casting, leading to high pressure accumulator,
to recess behind valve F, the oil or the like passes from high pressure accumulator
through hole O, and then through the flats or grooves on the tail of the second
loose valve F, to the chamber M from which it passes out through a hole P on to
the low pressure check valve Q. Fig. 2 to the press.
Within the hole D in the boss I employ preferably screw plugs R for the
purpose of regulating the travel of the valves E and F, for preventing the escape
of the fluid, at the same time allowing easy access to the valves for repairs and
the like.
For the purpose of regulating the supply of liquid to the press or the like, I
drill a hole preferably through the bottom of the casting direct to the hole O, the
said hole is tapped and a screw plug S with the square head and taper end is
inserted, the taper end fitting up to a seat formed at the bottom of hole O; in
addition to allowing the quantity of liquid to be regulated, it also allows of the
inlet being cleared of any sediment if it becomes choked, simply by unscrewing
the said plug S, I also drill a hole T, leading from the hole D in the boss, to the
exhaust chamber U, the said hole T being for the purpose of releasing escape
liquid or air.
The valves may be cast in sets of two or more according to requirements, by
continuing them as shown in Fig. 4, which shows a double stop valve.
The action is as follows:--The oil or liquid is turned on by raising the screwed
spindle V, which is generally used and known in connection with ordinary stop
valves, the liquid coming through the inlet O' from low pressure accumulator
raises the valve Q Fig. 2 and passes to the press or the like through the pipe W,
and also at the same time enters the hole D in the boss C, through the inlet D' and
acts upon the piston E, the said piston E pushes the high pressure valve F
and opens it, this allows liquid from the high pressure accumulator (which
comes through the pipe O¹) to pass through the flats on the said valve F,
and thence through the hole P direct to the press through pipe W so completing
the nip.

page_text: When releasing the pressure, the spindle V is screwed down and closes the
valve Q, Fig. 2. at the same time it opens the valve on the end of the spindle V
and allows the liquid to escape through the outlet U; when the low pressure
valve is closed, the pressure is released from the back of the piston E,
and the back pressure from the high pressure accumulator closes the valve F and
so completes the operation.
Hitherto it has been customary to put on the high and low pressure separately,
with my improvements the low pressure only is turned on, the liquid from the high
pressure being adinitted automatically by the liquid from the low pressure acting
on the piston E which in turn acts on the valve F, by this means accidents
to presses and the like are obviated, as it prevents the operator putting on the
high pressure before the proper time, and it also allows of a more regular nip
being given particularly to oil cake presses.
'
My improved stop is also applicable to pumps, hoists and the like, by arranging
the pipe connections to suit requirements.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. Constructing stop valves of hydraulic high and low pressure accumulators,
with a boss C having a hole or recess D in which works a loose valve piston E and
high pressure valve F, connected by means of hole or passage O to the high
pressure accumulator, plug S, hole or passage P to the low pressure valve,
and hole T, operating as and for the purposes substantially as shown and
described.
2. Constructing stop valves of hydraulic high and low pressure accumulators,
with boss C, hole D, piston E, valve F, holes O, P and T, plug S working in
connection with ordinary spindle valve V, and check valve Q, as and for the
purposes substantially as set forth.
Dated this Twenty fifth der of January 1895.
JOHN E. WALSH,
Crossley Street, Halifax and Saville Street, Hull,
Patent Agent for the Applicant.