Improvements in connection with Pumping and Compressing Systems.
Year: 1895

page_text: Date of Application, 30th July, 1895-Accepted, 14th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in connection with Pumping and Compressing
Systems.
I, LOCIS IRVING SEYMOUR of Erith Iron Works, Erith, in the County of Kent,
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 the arrangement and combination of parts in pumping
and compressing systems, the object being to obtain the most favorable results with
reference to the distribution of strains and the passing of dead centres, and in other
ways to produce an effective and durable plant.
To this end it is proposed to connect the motor piston with the pump or com-
pressing piston through a triangular connecting rod and a shaft or by a duplication
of these parts to connect compound systems.
In order that the invention may be clearly understood reference is made to the
accompanying drawing which indicates the invention when applied to a motor
cylinder working through a triangular connecting rod and a crank shaft and operating
a pump or compressing piston.
In this arrangement the motor piston rod A is pivotted at a to rod 6 which in
turn is pivotted at c to triangular connecting rod or frame C which in turn is
connected at d to crank B of shaft D.
On the opposite side the pump or compressing piston rod E is in like manner
pivotted at e and to the triangular rod or frame C at f, and finally the said triangular
With the connec-
frame or rod is pivotted at to rod F carried on fixed pivot h.
tions made as shown the relative positions of the motor and pump or compressing
pistons with reference to the position of the crank will be as follows:
When crank B is at point I the motor piston will be at bottom dead centre, when
at point II at top dead centre, when at III the pump or compressing piston will be
The motor stroke is
at top dead centre, and when at IV at bottom dead centre.
indicated by points V, VI, and the stroke of pump or compressor by VII VIII.
If for the purpose of illustration it is assumed that cylinder G is the high pressure
steam cylinder, and cylinder H the high pressure air cylinder of a two stage air
compressor, then a duplication of the parts at the other end of shaft D would show
the low pressure steam and low pressure air cylinders with their pistons similarly
attached to a triangular connecting rod or frame connected to a crank corresponding
to crank B. In this case of course there would be the usual steam connections
between the high and low pressure cylinders and a corresponding air connection in
which would preferably be placed an air cooler between the low and high pressure
air cylinders, or in lieu of this the high and low pressure steam pistons may be
connected to the same triangular connecting rod or frame, and the high and low
pressure air compressors be connected to a common frame, an air cooler being
interposed in the connecting pipe.
In a like way in triple expansion or compressing systems a third cylinder may be
introduced so as to have the pistons of two cylinders working at one point of the
triangular rod and only one at the other point or in quadruple systems the pistons
of two cylinders may be working at each of the piston rod connecting points on the
triangular connecting rod and it will be practically immaterial whether such
cylinders are superposed in pairs and work on one common piston rod or whether
they are separately connected.

page_text: It is generally preferable to have the triangular connecting rod mounted below
the crank shaft as the height of the engine can be then reduced and the parts be
made more accessible than if such connection be made above the shaft, but the
connection itself will work equally well either above or below.
In this system not only are the strains more evenly distributed than is usual but
the power from the motor cylinders can be uniformly applied to the crank shaft at
all portions of its stroke, and full power from the motor cylinder is applied at the
moment when greatest power is required in the air compressing cylinder when the
system is used for compressing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. In pumping or compressing systems the combination with the motor cylinder
piston rod, of a triangular connecting rod or frame, a crank shaft and a pump or
compression cylinder piston rod, substantially as described.
2. In pumping or compressing systems the combination of high pressure motor
and compressor cylinders the piston rods of which are coupled to a common
triangular connecting rod, a similar combination of low pressure motor and com-
pressor cylinders and connections, and a crank shaft common to both, substantially
as set forth.
3. In pumping or compressing systems the combination of high and low pressure
motor cylinders the piston rods of which are coupled to a common triangular
connecting rod, a similar combination of high and low pressure compressor
cylinders and connections, and a crank shaft common to both, substantially as set
forth.
4. In pumping or compressing systems the combination of multiple expansion
motor cylinders and one or more pumping or compressing cylinders with triangular
connecting rods and a common crank shaft, substantially as described.
Dated the 27th day of July 1895.
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicant.