IMPROVEMENTS IN THE CONSTRUCTION OF STEAM PUMPS
Year: 1876

page_text: LETTERS PATENT to John Cameron, of the Oldfield Road Iron Works, Salford,
in the County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS
IN THE CONSTRUCTION OF STEAM PUMPS."
Sealed the 26th May 1877, and dated the 11th December 1876.
PROVISIONAL SPECIFICATION left by the said John Cameron at the Office
of the Commissioners of Patents on the 11th December 1876.
JOHN CAMERON, of the Oldfield Road Iron Works, Salford, in the County of
Lancaster, Engineer. "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM PUMPS."
This Invention consists in certain improvements upon the Invention for which
former Letters Patent were granted to me on the 22nd day of November 1875,
No. 4051, whereby the number of parts of which the pump is composed and the
number of joints and packings is still further reduced and the strength is increased.
According to my present improvements the crank shaft is placed at right angles
to a line drawn between the columns, and it is supported in a bearing which forms
a connection to the columns, thereby adding considerably to the strength, and
allowing the crank for working the pump barrel to be forged at the end of the
crank shaft, which economises labour; the passage for the fluid between the columns
is also cast with them instead of being made. by a separate pipe, as shewn in the
former Patent, thereby dispensing with two joints and packings.
By means of these improvements pumps are reduced in cost and increased in
strength and durability.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Cameron in the Great Seal Patent Office on the 11th June
1877.
JOHN CAMERON, of the Oldfield Road Iron Works, Salford, in the County of
Lancaster, Engineer. "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM PUMPS."
This Invention consists in certain improvements upon the Invention for which
former Letters Patent were granted to me on the Twenty-second day of November
[Price 4d.]

page_text: 1875, Number 4051, whereby the number of parts of which the pump is composed
and the number of joints and packings is still further reduced and the strength is
increased.
According to my present improvements the crank shaft is placed at right angles
to a line drawn between the columns, and it is supported in a bearing which forms
a connection to the columns, thereby adding considerably to the strength, and
allowing the crank for working the pump barrel to be forged at the end of the
crank shaft, which economises labour; the passage for the fluid between the columns
is also cast with them, instead of being made by a separate pipe, as shewn in the
former Patent, thereby dispensing with two joints and packings.
By means of these improvements pumps are reduced in cost and increased in
strength and durability.
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 front view, Fig. 2 a side elevation in section, and Fig. 3 a plan in
section through the lower part of the pump.
'
a is the foundation plate; b, the pump cylinder; c, c, the supporting columns
containing the ingress and egress valves, and f is the bottom plate of the steam
cylinder g. These parts are cast together as described in the Specification of Letters
Patent above referred to. The piston rod h is connected as usual to the open
frame i which is cast with the plunger working in the pump barrel b, and to the
open frame i is jointed the upper end of the link 3, the lower end of which is connected
to the crank shaft k in the ordinary manner. The crank shaft k is now placed at
right angles to a line drawn between the columns c, c, and it is supported at one
end in the bearing c which forms a stay or connection between the columns,
thereby increasing the strength and allowing the crank for working the pump
barrel to be forged at one end of the crank shaft, which economises labour and adds
to its strength. The other end of the crank shaft is supported in the bearing c², as
usual. The eccentric k¹ for working the slide valve and the fly wheel are keyed on
the crank shaft, as usual. The pipe which forms the passage for the fluid
between the columns is also cast with the bearing c¹ and the columns, thereby
dispensing with the separate pipe described in the Specification before referred to,
and doing away with two joints and packings. The supply pipes and the other
parts requisite to complete the pump are made in the usual manner.
By means of these improvements the number of parts of which the pump is
composed is again reduced, thereby rendering such pumps more durable and
economising labour in construction.
Having thus stated the nature of my Invention and described the manner of
performing the same, I declare that I claim as my improvements in the construction
of steam pumps, casting the foundation plate, the pump cylinder, the supporting
columns, the bottom plate of the steam cylinder, one of the bearings of the crank
shaft, and the connecting pipe all in one piece, as shewn and described.
In witness whereof, I, the said John Cameron, have hereunto set my hand and
seal, this Eighth day of June, One thousand eight hundred and seventy-
seven.
JOHN CAMERON. (L.S.)