Year: 1887

page_text: Date of Application, 5th Mar., 1887.
Complete Left, 10th May, 1887.
Complete Accepted, 14th June, 1887.
I CHARLES SPENCER. MADAN of Mansfield Chambers, Saint Ann's Square,
Manchester, in the County of Lancaster, Engineer, do hereby declare the nature of
this invention to be as follows:-
My invention relates to an improved combination of Hydraulic Machinery, with
the object of rendering the use of direct acting steam Pumps, that is-Steam Pumps
without fly wheels, more economical for producing the power to work Hydraulic
Presses, Hoists and the like: Also the application of my system reduces the first cost
of such plant by avoiding the use of Pumps driven by a separate engine, with their
complicated and expensive gearing.
I use, for this purpose, two direct-acting Pumps, one calculated to work against a
pressure of-say-800 lbs. per square inch to 1000 lbs. per square inch, which I call
the low pressure Pump; the other calculated to work against a pressure of-say-
2 tons per square inch to 3 tons per square inch, which I call the high pressure
Pump.
The low pressure-Pump delivers into an Hydraulic Accumulator suitably weighted,
whence the water under compression is distributed to the Presses, Hoist, Lift, etc., the
pressure being sufficient to run up the Presses and work the Hoist or Lift: the high
pressure Pump being used only to put such additional pressure on the Presses, into
which it delivers direct, as may be required for the work in hand.
By this arrangement the waste steam, consequent on using a single Pump for both
high and low pressure is avoided while a steady and easily controlled movement of
the Presses, Hoist, Lift, etc., is secured.
Dated this:Kourth day of March 1887

page_text: COME LEIE DIECIFICATION.
Improvements in Hydraulic Machinery.
I CHARLES SPENCER MADAN of Mansfield Chambers, St. Ann's Square, 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:-
This invention relates to certain improvements in hydraulic machinery and is
specially applicable for actuating hydraulic accumulators, presses, hoists, and the like,
and has for its object to so combine or arrange the various parts that the first cost of
such plant is reduced and subsequent economical working of same is secured.
According to the systems at present practised a great waste of steam and fuel is
necessarily involved because the consumption for any hydraulic pressure required
whether high or low is practically the same, economical regulation of the steam being
impossible owing to the nature of the work. The object of this invention is to obviate
this waste and to this end I have devised a novel and economic method of supplying
the power to the extent required at the time without superfluity and this object I
attain by the novel application of a series or gradation of independent direct acting
steam pumps, (i.e. pumps without fly wheels) of powers varying and successively
increasing according to their respective duties, by which application the excessive
consumption of steam and fuel in the systems above referred to as at present in use is
avoided.
I can best describe my present improvements in reference to the accompanying
figure which diagrammatically represents an arrangement of parts which I have found
from practical experiment to be advantageous convenient and efficient.
I employ an independent direct acting steam pump a of sufficient power to charge
an accumulator a working the hydraulic machinery under ordinary conditions at say
800 to 1000 lbs. per square inch pressure and this I call the low pressure pump.
For the purpose of this description I have assumed the hydraulic machinery to be
bale presses e, c, e but it is obvious that any other hydraulic apparatus may be
substituted. Should the power required to actuate the hydraulic presses or other
machinery not exceed this pressure, then this pump a only is required to be worked.
In order however to provide for higher powers required I employ a second independent
direct acting steam pump calculated to work against a high pressure say two and a
half to three tons per square inch, which I call the high pressure pump, and this
pump I place in direct connection through pipe & with the press or presses c, c, e or
other hydraulic machinery, to which it is used only to supply pressure in excess of that
which the low pressure punip a is calculated to exert. In certain cases I interpose a
suitable accumulator between the high pressure pump and the press or presses. Such
an arrangement is shown dotted at and connected to the pipe b¹.
Both the pumps are controlled by cut off valves of suitable type and in the case of
the low pressure pump a steam is automatically admitted or cut off as and when
required, the controlling valve being actuated by suitable tappet arms or equivalents

page_text: according to the position of the accumulator a. In the case of the high pressure
pump, when there is no accumulator 62, the controlling valve is actuated by hand as
and when required, a suitable arrangement of levers such as is indicated at d d being
provided for convenience but when there is a high pressure accumulator the cut off
valve may be automatically operated as described in the case of the low pressure
pump a.
By this arrangement, only the precise quantity of steam required for the work is
used, and the waste of steam consequent on using a single pump designed to exert
the higher power when only the lower one is required is avoided, while a steady and
easily controlled movement of the presses, hoist, lift, or other machinery is secured.
On the same principle it is obvious that where greater power is required a gradation
of similar pumps of successively increasing powers may be provided each to be used
only as required.
I am aware that the use of direct acting steam pumps is old and they have been
used before for analagous purposes but I consider their application as herein described
is novel useful and economical and having now particularly described and ascertained
the nature of this invention and in what manner the same is to be performed I declare
that what I claim is
1. The improvements in hydraulic machinery consisting of the combination or
arrangement of two or more independent direct acting steam pumps, the first being
a low pressure pump charging a hydraulic accumulator working the hydraulic
apparatus, and the next being a high pressure steam pump connected either direct to
or through an accumulator working the hydraulic apparatus all arranged as and for
the purposes set forth.
2. The combination with hydraulic machinery of a series or gradation of in-
dependent direct acting steam pumps of powers successively increasing according to
their respective duties as and for the purposes described.
m
1
"
1007
J. C. CHAPMAN,
70, Chancery Lane, London, W:C.,
Agent for Applicant.