Improvements in Plungers and Pump Rods.
Year: 1889

page_text: Date of Application, 7th June, 1889
Complete Specification Left, 6th Mar., 1890-Accepted, 12th Apr., 1890
:
PROVISIONAL SPECIFICATION.
Improvements in Plungers and Pump Rods.
I ALFRED AUSTIN RICKABY of Bloomfield Engine Works, Sunderland, in the County
of Durham, Engineer, do hereby declare the nature of this invention to be as
follows:-
For my improved plungers and pump rods I use, instead of the usual solid plungers
and rods, a rolled tube of any desired thickness and diameter, made preferably of
Manganese Bronze, this being a non-corrosive metal which is well adapted for stan ling
the action of acids and other deleterious liquids and which is also specially suitable
owing to its great tensile strength, although I do not confine myself exclusively to
this metal.
In the case of plungers I cut off the desired length of tube and swage or forge
down one end for screwing or keying on an iron or steel rod or on to any moving part
from which the stroke is obtained, and the other end I swage or forge over forming a
solid bottom with a hole tapped in same so that it will let out any air that may
accumulate in the forging; this hole being plugged up by a screw to form a proper
plunger for displacement.
I also use these rolled tubes for pump rods, for which in this form they are specially
adapted owing to their lightness and in this case also I prefer to use the Manganese
Bronze on account of its suitability owing to its possession of the aforenamed
qualities.
Dated this Fourth day of June 1980
COMPLETE SPECIFICATION.
Improvements in Plungers and Pump Rods.
I, ALFRED AUSTIN RICKABY of Bloomfield Engine Works, Sunderland, in the County
of Durham, 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 :-
For my improved plungers and pump rods, I use, instead of the usual solid plungers
and rods, a rolled tube of any desired thickness and diameter, made preferably of
Manganese Bronze, this being a non-corrosive metal which is well adapted for standing
the action of acids and other deleterious liquids, and which is also specially suitable
owing to its great tensile strength, although I do not confine myself exclusively to
this metal.
In the case of plungers 1 cut off the desired length of tube and swage or forge
down one end for screwing or keying on an iron or steel rod or on to any moving part
from which the stroke is obtained, and the other end I swage or forge over forming a
solid bottom with a hole tapped in same so that it will let out any air that may
accumulate in the forging, this hole being plugged up by a screw to form a proper
plunger for displacement.
I also use these rolled tubes for pump rods for which in this form they are specially
adapted, owing to their lightness, and in this case also I prefer to use the Manganese
Bronze on account of its suitability owing to its possession of the aforenamed
qualities.

page_text: 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. A tube made of suitable metal, preferably of Manganese Bronze, swaged at each
end, for Plungers or Pump Rods, substantially as described.
2. The method of releasing air during the closing of each end, as described.
3. The method of attaching on to an iron or steel rod, or to any moving part from
which the stroke is obtained, the plunger or pump rod as described.
Dated this 6th day of March 1890.
A. A. RICKABY.