IMPROVEMENTS IN MACHINERY FOR PUMPING, FORCING, BLOWING, AND EXHAUSTING AIR AND OTHER FLUIDS
Year: 1877

page_text: LETTERS PATENT to Robert Johnson, of Seedley, near Manchester, in the County
of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN MACHINERY
FOR PUMPING, FORCING, BLOWING, AND EXHAUSTING AIR AND OTHER FLUIDS."
Sealed the 19th June 1877, and dated the 12th April 1877.
PROVISIONAL SPECIFICATION left by the said Robert Johnson at the Offico
of the Commissioners of Patents on the 12th April 1877.
ROBERT JOHNSON, of Seedley, near Manchester, in the County of Lancaster,
Engineer. "IMPROVEMENTS IN MACHINERY FOR PUMPING, FORCING, BLOWING, AND
EXHAUSTING AIR AND OTHER FLUIDS."
My improved machinery consists of a cylinder with covers supporting a central
axle; within this cylinder are two segmental divisions extending from the inside
circumference to the axle, to which is fixed a double blade. At the outside of the
axle is fixed a lever, which is connected to the piston rod of a steam cylinder or
other motor by a connecting rod. As the piston of the steam cylinder is moved to
and fro the connecting rod imparts an oscillating motion to the lever and to the
axle to which it is fixed; by this means the double blade is moved to and fro in tho
spaces between the segmental divisions above referred to, and as these spaces are
provided with inlet and outlet passages and valves it is evident that every to-and-fro
motion of the steam piston or other motor draws in and forces out a certain
quantity of air, water, or other fluid, equal to the capacity of the space between the
segmental divisions.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Robert Johnson in the Great Scal Patent Office on the 11th
October 1877.
ROBERT JOHNSON, of Seedley, near Manchester, in the County of Lancaster,
Engineer. "IMPROVEMENTS IN MACHINERY FOR PUMPING, FORCING, BLOWING, AND
EXHAUSTING AIR AND OTHER FLUIDS."
My improved machinery consists of a cylinder with covers supporting a central

page_text: axle; within this cylinder are two segmental divisions extending from the inside
circumference to the axle, to which is fixed a double blade. At the outside of the
axle is fixed a lever, which is connected to the piston rod of a steam cylinder or
other motor by a connecting rod. The segmental divisions above referred to aro
provided with inlet and outlet passages and valves, consequently overy to-and-fro
motion of the steam piston or other motor draws in and forces out a certain quantity
of air, water, or other fluid.
And in order that my Invention may be fully understood and readily carried into
operation, I will proceed to describe the accompanying Sheet of Drawings, in which
Fig. 1 is a longitudinal section of my improved machinery for pumping, forcing,
blowing, and exhausting air and other fluids, and Fig. 2 is a transverse section of the
same through the line A, B, on Fig. 1.
a is the cylinder which is made of the required capacity, according to the quantity
of fluid to be acted upon; a¹, a², the outlet branches; 61, 62, the inlet branches,
and b, c, the covers at the ends of the cylinder a. In each cover is a bearing
supporting the central axle d, to which is fixed a double blade d. Within the
cylinder a are two segmental divisions or abutments e, extending from the inside
circumference of the cylinder to the axle, and the wood or other packing ribs e' aro
inserted in the divisions c to form the joint. In the divisions e are passages for tho
valves f, ff, and f³. The valves f, f¹, are in communication with the inlet
branches b, b; and the valves ff, are in communication with the outlot
branches a, a²; the valves ff, and fifs, are separated by the midfeathers c². At
the outside of the axle d is fixed the lever d, which is connected to the piston
rod g² of the steam cylinder g, or other motor by the connecting rod g².
£1 2
The Drawing represents the parts in the positions they occupy when the piston
in the steam cylinder g or other motor is moving in the direction of the arrow in
Fig. 1, and consequently when the double blade is approaching the segmental
divisions e; at this time the valves f are open to admit the fluid into the cylinder a,
and the valves f³ are open to discharge the fluid while the valves f¹ and fare
shut. When the piston in the steam cylinder arrives at the end of the stroke the
double blade d¹ will be close to the divisions e; at this point the valves ƒiƒ¹‚ ƒ²,
and f³, are all closed, but when the steam piston commences its return stroke in the
cylinder the positions of the valves are reversed to admit the fluid into the spaces
from which it had been discharged, and to discharge the fluid previously admitted.
By this means every to-and-fro motion of the steam piston or other motor imparts
an oscillating or reciprocating motion to the double blade d', and twice in cach
to-and-fro motion draws in and forces out a quantity of air, water, or other fluid
equal in capacity to the space between the segmental divisions e, minus the thick-
ness of the double blade c¹.
g
Having thus stated the nature of my Invention and described a convenient
manner of performing the same, I wish it to be understood that I do not intend
to limit myself to the details given, as the same can be varied or modified according
to the peculiar purpose to which my improved machinery is applied; I claim as my
Invention the double blade d', and the reciprocating action thereof in segmental
portions of circles from one division or abutment to another, in the manner and for
the purposes described.
In witness whereof, I, the said Robert Johnson, have hereunto set my hand
and seal, this Eighth day of October, One thousand eight hundred and