Improvements in Hydraulic Presses.
Year: 1893

page_text: Date of Application, 14th July, 1893
Complete Specification Left, 16th Apr., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Presses.
We, SAM LEEMING SMITH, of Church Street, Heckmondwike, in the County
of York, Hay and Straw Merchant, and WILLIAM HARVEY SMITH, of 3, George
Yard, Bradford, in said County Insurance Agent do hereby declare the nature of
this invention to be as follows:-
This invention relates to Improvements in Hydraulic Presses and its primary
object is to increase the speed of action.
For this purpose we so arrange and connect the top plate of the press with the
bottom plate that the top plate is brought down to meet the bottom plate as the
latter is raised by the ram.
We may connect and operate the top plate from the bottom plate by means of
chains, wire ropes or their equivalent (preferably two at each end) secured to the
underside of the bottom plate and passed under pulleys mounted on the framework
of the press below the bottom plate and their other ends firmly secured to the top
plate. A single chain or rope at each end connected to the top plate and passed
over pulleys mounted on the framework above and connected to the bottom plate
is also provided to raise the top plate when the bottom plate is lowered.
By this construction the speed of action of the press is doubled. The length of
the ram may be reduced and as practically the whole of the strain is thrown upon
the lower part of the framework the cost may be reduced.
An arrangement of levers and connecting rods may be used instead of said pulleys
and chains.
Dated this 13th day of July 1893.
DRACUP & NOWELL,
Bradford, Agents.
COMPLETE SPECIFICATION.
Improvements in Hydraulic Presses.
We, SAM LEEMING SMITH, of Church Street, Heckmondwike, in the County
of York, Hay and Straw Merchant, and WILLIAM HARVEY SMITH, of 3, George
Yard, Bradford, in said County, Insurance Agent, 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 Hydraulic Presses and its primary
object is to increase the speed of action.
For this purpose we so arrange and connect the top plate of the press with the
bottom plate that the top plate is brought down to meet the bottom plate as the
latter is raised by the ram.
By this construction the speed of action of the press is doubled. The length of
the ram may be reduced and as practically the whole of the strain is thrown upon
the lower part of the framework the cost may be reduced.
Reference is to be had to the accompanying sheet of drawings forming a part
of this Specification, in which similar letters of reference indicate similar parts in
each of the figures.

page_text: Figure 1, represents an elevation of a press for trussing hay with our improve-
ments applied thereto.
Figure 2, is a side view and Figure 3, is a plan view of the same.
The framework A the bottom plate or table B the ram C and the ram cylinder D
are of any ordinary construction excepting that the ram C need only be the length
required to raise the table B half the distance usual in the ordinary type of press.
The hydraulic pressure may be applied to the ram by a hand pump or any other
ordinary way.
The underside of the table B is connected by the rods E, E to the inner ends of
the levers F, F pivoted on the pins G, G passed through the lugs H, H and H, H
projecting from the plates J, J attached to the wooded blocks K, K secured to and
between the cross bars a, a of the framework. The outer ends of the levers F are
connected by the rods L, L to the pins M, M passed through the lugs N, N pro-
jecting from each end of the top plate O. It will be evident in the above
arrangement that as the bottom plate B is lifted the top plate O is lowered through
the medium of the connecting mechanism. The weight of the bottom plate is so
much greater than the top plate that on the bottom plate falling when the pressure
is removed from the ram it raises the top plate. A spiral spring S however may
be stretched between the top of the framework and the rod L at each end of the
machine, as shown in Figure 2, to assist in raising the top plate.
The improvements are also applicable to presses for other purposes.
Instead of the arrangement shown we may connect and operate the top plate
from the bottom plate by means of chains, wire ropes or their equivalent
(preferably two at each end) secured to the underside of the bottom plate and
passed under pulleys mounted on the framework of the press below the bottom
plate and their other ends firmly secured to the top plate. A single chain or rope
at each end connected to the top plate and passed over pulleys mounted on the
framework above and connected to the bottom plate is also provided to raise the top
plate when the bottom plate is lowered.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :
1. A hydraulic press in which the plate operated by the ram is connected to and
operates the other plate, substantially as herein shown and described.
2. The combination with the table or ram plate of a hydraulic press, of the
levers F, F and coupling rods E, E and L, L, substantially as herein shown and
.described and for the purpose specified.
Dated this 13th day of April 1894.
DRACUP & NOWELL,
Bradford, Agents.