IMPROVEMENTS IN STEAM ENGINES, APPLICABLE MORE PARTICULARLY FOR USE IN COMBINATION WITH PUMPS AND VARIOUS OTHER MECHANISM
Year: 1875

page_text: LETTERS PATENT to Frank Pearn and Sinclair Pearn, of the City of
Manchester, in the County of Lancaster, Engineers, for the Inven-
tion of "IMPROVEMENTS IN STEAM ENGINES, APPLICABLE MORE PARTICULARLY
FOR USE IN COMBINATION WITH PUMPS AND VARIOUS OTHER MECHANISM,”
ealed the 21st March 1876, and dated the 8th November 1875.
PROVISIONAL SPECIFICATION left by the said Frank Pearn and
Sinclair Pearn at the Office of the Commissioners of Patents, with
their Petition, on the 8th November 1875.
We, FRANK PEARN and SINCLAIR PEARN, of the City of Manchester,
in the County of Lancaster, Engineers, do hereby declare the nature
of the said Invention, for "IMPROVEMENTS IN STEAM ENGINES, APPLICABLE
MORE PARTICULARLY FOR USE IN COMBINATION WITH PUMPS AND VARIOUS OTHER
MECHANISM," to be as follows :—

page_text: and at one side of the piston rod, and the cross head of the piston rod
is connected by two links with the two arms of a double lever on a
rocking shaft, having bearings attached to the frame or bed of the
engine; the connecting rod to the crank is jointed with the arms of the
double rocking lever; the valve box of the cylinder is placed in an
oblique line in relation to the axis of the cylinder to form a straight line
to the crank shaft, the valve or valves being worked by an excentric or
excentrics upon the end of the crank shaft. By this arrangement the
ram or pump rod of pumps can be connected directly with the cross
head, and the engine and pumps are brought within small compass, and
the engine can be readily connected or disconnected with mechanism
requiring direct reciprocating motion, and may be used for imparting
combined reciprocating and rotary motion as required for pumping and
winding and various other purposes.
Secondly. Our Invention relates to steam pumps where the fly wheel
shaft is placed in a line with and at the end of the ram case, the ram
being directly actuated by the piston rod, in which case an open
connecting rod is used to pass on each side of the ram, and our Inven-
tion consists in the mode of jointing the open connecting rod with the
upper part of the ram.
The joint of the open connecting rod on each
side of its two arms is mad to form part of a circle, and corresponding
cavities are formed in a gap in the upper part of the ram, and the part
in which one cavity is formed is moveable, and is secured by a bolt to
the ram, and is tightened or adjusted by a cottar.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Frank Pearn and Sinclair Pearn in the Great
Seal Patent Office on the 3rd May 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, FRANK
PEARN and SINCLAIR PEARN, of the City of Manchester, in the County
of Lancaster, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters. Patent, bearing date the Eighth day of November, in the year

page_text: head, and the engine and pumps are brought within small compass, and
the engine can be readily connected or disconnected with the mechanism
requiring direct reciprocating motion, and may be used for imparting
combined reciprocating and rotary motion, as required for pumping and
winding and various other purposes.
The accompanying Sheet of Drawings illustrates our Invention, Fig. 1
being a side sectional elevation, and Fig. 2 a plan view.
A is the bed or framing; a, the steam cylinder; b, the piston rod;
c, cross head for slide blocks which work in the slides c¹; d, links
jointed with the cross head c and with the arms e' of the rocking shaft e,
having suitable bearings in the bed or framing; f, a connecting rod
jointed between the two arms e¹ and with the crank g¹ of the crank
shaft g, having its bearings in the bed or framing; h is the fly wheel.
The valve box a¹ is diagonal, so that the spindle i of the slide valve
comes in a line with the axis of the crank shaft g, the valve being
worked by an excentric ; and connecting rod j¹ from the excentric to
the valve spindle (i). The steam is conveyed to the cylinder by the
pipe a², and the exhaust steam is conveyed away by the pipe a³. The
piston rod passes from the cross head through a stuffing box, and is
attached to a double-acting ram k, which is packed by a stuffing box
about the middle of the ram barrel, as shown. I is the inlet for liquid;
m are the inlet valves, access to which can be had from the sides by
removing the covers m²; n are the outlet valves, access to which can be
had by removing the covers n¹; p is the air vessel; and 9 are outlets
for the pumped liquid as required, that not in use being closed by a
cover or by a tap or valve.
-
When required the exhaust steam is conveyed as shown to the inlet
chamber l', and will be rapidly condensed by the water or liquid drawn
in by the action of the pump, and the condensed steam will pass with
the liquid through the pump.
We have now particularly described the nature of our Invention and
the mode of carrying the same into effect, and claim as our Invention,
the combination and arrangement of the steam cylinder and pumps
with the crank shaft and rocking shaft, substantially as herein-before

page_text: described and illustrated by the Drawings, and the arrangement for
condensing the exhaust steam, as shown and described.
In witness whereof, we, the said Frank Pearn and Sinclair Pearn,
have hereunto set our hands and seals, this Second day of May,
in the year of our Lord One thousand eight hundred and seventy-
six.