Improvements in or pertaining to Hydraulic Presses.
Year: 1889

page_text: Date of Application, 22nd Oct., 1889
Complete Specification Left, 8th Nov., 1889-Accepted, 22nd Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in or pertaining to Hydraulic Presses.
I, CHARLES ALBERT PIAT or 85 Rue Saint Maur, Paris, in the Republic of France,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in or pertaining to hydraulic presses.
According to my invention the actions and reactions take place in the interior of
the apparatus, and the said apparatus is suspended from the extremity of a swing arm
instead of a jib or ordinary crane; the press can thus be readily manipulated and can
be used in connection with several platforms or tables. Or the press may with the
same object be carried by rails.
The support whether swing arm or rails has only to withstand the mere weight
of the apparatus and is not affected by the interior actions which may be developed,
as is the case in ordinary presses where the action takes place between a bed piece
or support and a head piece.
Apparatus according to my invention is, by way of example, illustrated in the
annexed sheet of drawings.
Figs. 1 and 2 are respectively a front view and a side elevation partly in section
of the press and the means for supporting it.
A is a hydraulic cylinder supported by a shoulder E upon the collar K of a
pivotted frame C. In this cylinder works a piston P carrying a compressing plate M.
The ascent and descent of this piston are effected by means of water under pressure
distributed by distributing apparatus which is or may be of the kind described in
the specification of a former patent granted to me dated 25 May 1886 No. 7026 and
of which a longitudinal axial section is shewn in Fig. 3.
It is not necessary to give a detailed description of this distributor in this specifi-
cation. It is shown in dotted lines in the position it is intended to occupy against
the collar K, with its inlet and discharge pipes, the flow of water being indicated by
dotted arrows, the first of which marked indicate the flow for the ascent of the
piston, whilst the second marked & indicate the flow corresponding to the descent of
the piston when it has to exert the desired pressure.
The cylinder A ends in four lugs D, D to which and upon the pins passing through
the same, are freely jointed four tie-rods T T T Teach terminating in a hook like
those shewn at c c in Fig. 1. These hooks engage with the underside of a plate or
table G that need not be of great thickness in order to withstand great
pressures.
Upon this table which must be freely mounted or preferably surrounded with
a frame or framing, is placed the material to be pressed such as earth sand or
forage.
A lever L operated by hand allows, when necessary of the two front tie-rods being
brought out of the vertical in such a manner as to raise their ends so as to enable
them to pass above the table which they support on their hooks when they are allowed
to fall back.
By bringing the two other tie-rods nearer the table is brought into position
between the four hooks on the one hand and the pressing plate on the other
hand.
The vertical axis or shaft H which supports the frame and turns or travels
therewith, is provided with a stuffing box at one end for the reception of the pipe
supplying the pressure water.
The exhaust pipe may in like manner pass out through the same end or
through the other end or it may freely eject the exhaust water whilst following the
motion of the annarains

page_text: A frame containing for example, moulding sand to which pressure say of 10 to 15
tons is to be applied, may rest on the table G. The compressing plate M having
been brought over the frame, will descend when the distributor conveys water under
pressure in the direction of the arrows b, to the upper part of the cylinder, and will
compress the material.
At this time the pressure increasing upon the piston, and the latter meeting an
increasing resistance, the cylinder, the tie-bars attached thereto and the table are
raised slightly by the reaction exerted between the upper face of the piston and the
corresponding cylinder head. The material is thus squeezed between the compressing
plate M and the table G, without the point of suspension being subjected to any
other strain than that caused by the mere weight of the apparatus, the pressure which
may be exerted acting only upon the tie-rods between the table G and the plate M, or
between the upper head of the cylinder and the adjacent face of the piston P.
When the pressing operation is completed, the water is led beneath the piston,
raises the plate and releases the machine which can at once serve for another
operation, upon an adjacent platform or upon the same one.
It will be seen that this apparatus which is economical and of light construction,
enables, without any foundation being necessary, a most powerful internal action to
be exerted, without the point of support, when at rest, or the point of suspension
when working, having to withstand any other strain than that of the mere weight
of the apparatus, the manipulation of which is rendered easy, by means of the
operation of the distributor in combination with the piston and with the system of
support employed, by means of which the piston can be readily made to ascend or to
descend and the press can be moved in a horizontal plane.
Dated this 22nd day of October 1889.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or pertaining to Hydraulic Presses.
I, CHARLES ALBERT PIAT, of 15 Rue des Halles, Paris, in the Republic of France,
Manufacturer, 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 relates to improvements in or pertaining to hydraulic presses.
According to my invention the actions and reactions take place in the interior of
the apparatus, and the said apparatus is suspended from the extremity of a swing arm
instead of a jib or ordinary crane; the press can thus be readily manipulated and can
be used in connection with several platforms or tables. Or the press may with the
same object, be carried by rails. The support, whether swing arm or rails, has only
to withstand the mere weight of the apparatus and is not affected by the internal
strains which may be developed, as is the case in ordinary presses where the action
takes place between a bed piece or support and a head piece.
Apparatus according to my invention is illustrated in the sheet of drawings filed
with my Provisional Specification.
Figs. 1 and 2 are respectively a front view and a side elevation partly in section of
the press and the means for supporting it.
A is a hydraulic cylinder supported by a shoulder E upon the collar K of a pivotted
frame C. In this cylinder works a piston P carrying a platen or compressing
plate M. The ascent and descent of this piston are effected by means of water under
pressure distributed by distributing apparatus which is or may be of the kind described
in the specification of a former patent granted to me dated 25 May 1886 No. 7026 and
of which a longitudinal axial section is shewn in Fig. 3. It is not necessary to give a

page_text: detailed description of this distributor in this specification. It is shown in dotted
lines in the position it is intended to occupy against the collar K with its inlet and
discharge pipes, the flow of water being indicated by dotted arrows, the first of which
marked indicates the flow for the ascent of the piston, whilst the second marked b
indicates the flow corresponding to the descent of the piston when it has to exert the
desired pressure.
The cylinder A ends in four lugs D D to which and upon the pins passing through
the same, are freely jointed four tie-rods T, T¹, T", Teach terminating in a hook
like those shewn at c c in Fig. 1. These hooks engage with the underside of a plate
or table G that need not be of great thickness in order to withstand great pressures.
Upon this table, which must be freely mounted and preferably surrounded with a
frame or framing, is placed the material to be pressed, such as earth, sand, or
forage.
A lever L operated by hand allows, when necessary, of the two front tic-rods being
brought out of the vertical in such a manner as to raise their ends so as to cause them
to rise above the table, which they support on their hooks when they are allowed to
fall back.
By bringing the two other tie-rods nearer, the table is brought into position between
the four hooks and the platen or pressing plate.
The vertical axis or pillar H which supports the frame C and turns or travels
therewith, is provided with a stuffing box at one end for the reception of the pipe
supplying the pressure water.
The exhaust pipe may in like manner pass out through the same end or through
the other end, or it may freely eject the exhaust water whilst following the motion of
the apparatus.
A frame I containing for example moulding sand to which pressure say of 10 to 15
tons is to be applied, may rest on the table G. The platen or compressing plate M
having been brought over the frame, will descend when the distributor directs water
under pressure in the direction of the arrows b to the upper part of the cylinder, and
will compress the material. At this time the pressure increasing upon the piston,
and the latter inmeeting an increasing resistance, the cylinder, the tie-bars attached
thereto and the table are raised slightly by the reaction exerted between the upper
face of the piston and the corresponding cylinder head. The material is thus squeezed
between the compressing plate M and the table G, without the point of suspension
being subjected to any strain beyond that caused by the mere weight of the apparatus,
the pressure which may be exerted acting only upon the tie-rods between the table G
and the plate M, or between the upper head of the cylinder and the adjacent face of
the piston P.
When the pressing operation is completed, the water is led beneath the piston,
raises the plate and releases the machine which can at once serve for another operation,
upon an adjacent platform or upon the same one.
It will be seen that this apparatus which is economical and of light construction,
enables, without any foundation being necessary, a most powerful internal pressure to
be exerted without the point of support, when at rest, or the point of suspension when
working, having to withstand any other strain than that of the mere weight of the
apparatus. At the same time the manipulation is rendered easy, by means of the
operation of the distributor in combination with the piston and with the system of
support employed, by means of which the piston can be readily made to ascend or to
descend, and the press can be moved in a horizontal plane.
Having now particularly described and ascertained the nature of the said inven-
ion and in what manner the same is to be performed I declare that what
s claimed in a hydraulic press in which the strains are internal and which is
provided with a piston is:-
1. Tie-bars such as T, T¹ each provided with a hook such as c and freely suspended
rom an axis such as a passing through a lug such as D on the cylinder A, in com-
ination with an operating lever such as L and a press table G.

page_text: 2. The cylinder A with collars E E in combination with a frame C, having a
collar K fitting loosely between the collars E E the said frame turning with the
axis H which has a stuffing box S, through which passes the pipe that supplies the
pressure water to the distributor S of the press.
3. The combination of the piston P, the hydraulic distributor S, and the collar K
surrounding the cylinder A the whole so arranged as to permit of the rotary move-
ment of the apparatus in conjunction with the up and down movement of the
piston.
Dated this Qth day of November 1880
W. LLOYD WISE,
Per F. J. B.,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.