Year: 1896

page_text: Date of Application, 19th Oct., 1896
Complete Specification Left, 17th July, 1897-Accepted, 18th Sept., 1897
poses.
I, ROBERT LEGG of the City Engine Works Eagle Wharf Road in the County
of Middlesex do hereby declare the nature of this Invention to be as follows:-
According to this invention the Press has a differential hydraulic ram and its
cylinder at the top, a fixed projecting ram at the base, and a box or case open at
top and bottom suspended between the moveable, and the fixed rams in such a way
that it slides vertically to a certain extent so that after the box is filled with the
goods to be pressed and the hydraulic ram at the top is caused to descend, the box
will also descend at about half the speed of the hydraulic ram and cause the fixed
ram at the base to press the goods upwards towards the centre of the box whilst
the hydraulic ram is pressing them downwards thus nearly equalising the pressure
on both ends of the mass of goods and reducing to a great extent the varying effect
due to side friction when pressure is exerted at one end only.
The box or case is steam jacketted at the sides and back and is closed at the
front by doors and has no joints from which steam can possibly leak into contact
with the goods being supplied by telescopic or flexible pipes at the back.
Dated this 19th day of October 1896.
I, ROBERT LEGG, of the City Engine Works, Eagle Wharf Road, in the County
of Middlesex, 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:-
According to this invention the Press has a differential hydraulic ram and its
cylinder at the top, a fixed projecting ram at the base, and a box or case open at
top and bottom suspended between the moveable, and the fixed rams in such a way
that it slides vertically to a certain extent so that after the box is filled with the
goods to be pressed and the hydraulic ram at the top is caused to descend, the box
will also descend at about half the speed of the hydraulic ram and cause the fixed
ram at the base to press the goods upwards towards the centre of the box whilst
the hydraulic ram is pressing them downwards thus nearly equalising the pressure
on both ends of the mass of goods and reducing to a great extent the varying effect
due to side friction when pressure is exerted at one end only.
The box or case is steam jacketted at the sides and back and is closed at the

page_text: front by doors and has no joints from which steam can possibly leak into contact
with the goods being supplied by telescopic or flexible pipes at the back or side.
Figure 1 is a side elevation of the press.
Figure 2 is a front elevation.
Figure 3 is a vertical section on the line 3-3 Figure 1.
Figure 4 is a plan and
Figure 5 is a horizontal section on the lines 5-5 Figures 1, 2 and 3.
A is the steam jacketted box or case in which the goods to be operated on are
placed.
B is the differential ram.
C is the hydraulic cylinder in which the ram works.
D is a plunger box connected to the lower end of the ram and having a flange D¹
engaging with hooks or flanges A¹ on the top of the box A.
E is the base of the press with its fixed projecting ram E' and side plates E³
carrying the cylinder C and serving as guides for the box A.
Fare doors hinged at F with swing bolts and nuts F3 for closing the front of
the box.
G, G, are hydraulic valves for admitting high pressure fluid alternately to either
end of the cylinder through pipes I. J.
H H are a pair of escape valves arranged on one spindle to ensure that one or
other end of the cylinder shall always be open through the pipes K. L.
M is a telescopic pipe and stuffing box for admitting steam to the jacket-a
similar contrivance to M may be used for discharging the water of condensed steam
from the jacket but a flexible pipe and common tap is preferred.
The inlet and outlet pipes to the jacket may be in duplicate and in such cases
are applied to opposite sides.
Articulated or flexible pipes may be used for both or either admission or
ejection but I prefer the telescopic pipe for admission.
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. In a hydraulic press the combination of a fixed ram at the bottom, a moving
ram at the top, a sliding box in which the rams work hung from the top
ram and doors at one side of the box substantially as described.
2. The combination of a fixed ram at the bottom, a moving differential ram at
the top, a sliding box in which the rams work hung from the top ram and doors
at one side of the box substantially as described.
3. The combination with a box such as is referred to in the preceding claims of
a heated jacket substantially as described.
4. Presses substantially as described and shown in the drawings.
DL 151 1 T 1 100%