IM- PROVEMENTS IN STEAM LUBRICATORS
Year: 1869

page_text: LETTERS PATENT to James Purdy Rennoldson, of South Shields, in
the County of Durham, Engine Builder, for the Invention of "IM-
PROVEMENTS IN STEAM LUBRICATORS."
Sealed the 22nd April 1870, and dated the 26th October 1869.
PROVISIONAL SPECIFICATION left by the said James Purdy Rennold-
son at the Office of the Commissioners of Patents, with his Petition,
on the 26th October 1869.
I, JAMES PURDY RENNOLDSON, of South Shields, in the County of
Durham, Engine Builder, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM LUBRICATORS," to be as follows:-
My Invention has reference to a lubricator which is intended to be
screwed on to either the main steam pipe, the cylinder cover, the valve
chests, or other convenient place, and consists in an arrangement and
combination of apparatus for the purpose of lubricating steam by the
action of steam upon a piston and rod, which are caused to move up and
down upon every shock caused by the alternate opening and closing of
the expansion or main valve, thereby causing a portion of the tallow or

page_text: other lubricant to descend into the steam pipe, and there mixing with
the steam to lubricate the valves, piston cylinder, and other parts of the
engine. Or the said lubricator may be fixed on steam boilers, and used
for the purpose of getting tallow or other lubricant into the said steam
boilers to prevent priming. When the engine ceases to work the action
of the small piston also ceases, and the supply of the lubricant is
prevented.
The apparatus for the purpose consists of a tube or cylinder in which
the small piston works, the top of which tube or cylinder is formed with
a socket, into which is screwed the bottom or neck of a vessel composed
of glass or other suitable material for containing the lubricant, and at
the bottom of the said tube or cylinder with another socket to be
screwed into the steam pipe or other part of the engine required. A
stop-cock may be inserted in this latter socket or not as preferred. In
a recess in the bottom of the screwed socket is inserted a washer of brass
or other suitable material, through which the piston rod passes in order
to steady it, the hole in the said washer to be slightly larger in diameter
than the piston rod, so as to allow the lubricant to descend. The
lubricant vessel has also at the top a neck with an opening through
which the tallow or other lubricant may be admitted, such opening being
covered by a brass top screwed on to a leather washer. The said brass
top may be fitted with a brass stop-cock and cup, also for the purpose of
admitting the lubricant if required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Purdy Reunoldson in the Great Seal 2
Patent Office on the 22nd April 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
PURDY RENNOLDSON, of South Shields, in the County of Durham,
Engine Builder, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 3
Letters Patent, bearing date the Twenty-sixth day of October, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said James Purdy Rennoldson, Her special

page_text: licence that I, the said James Purdy Rennoldson, my executors,
administrators, and assigns, or such others as I, the said James Purdy
Rennoldson, my executors, administrators, and assigns, should at any
time. agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN STEAM LUBRICATORS," upon the condition (amongst
others) that I, the said James Purdy Rennoldson, my executors or
administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patcut.
NOW KNOW YE, that I, the said James Purdy Rennoldson, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the Drawing
hereunto annexed, and to the letters and figures marked thereon (that
is to say):-
My Invention of Improvements in Steam Lubricators "has reference
to a lubricator which is intended to be screwed on to either the main
steam pipe, the cylinder cover, the valve chests, or other convenient
place, and consists in an arrangement and combination of apparatus
for the purpose of lubricating steam by the action of steam upon a
piston and rod, which are caused to move up and down upon every
shock caused by the alternate opening and closing of the expansion or
main valve, thereby causing a portion of the tallow or other lubricant
to descend into the steam pipe, and there mixing with the steam to
lubricate the valves, piston, cylinder, and other parts of the engine.
Or the said lubricator may be fixed on steam boilers and used for the
purpose of getting tallow or other lubricant into the said steam boilers
in order to prevent priming. When the engine ceases to work the
action of the small piston also ceases, and the supply of the lubricant is
prevented.
The apparatus for the purpose consists of a tube or cylinder in which
the small piston works, the top of which tube or cylinder is formed with

page_text: a socket into which is screwed the bottom or neck of a vessel composed
of glass or other suitable material for containing the lubricant, and at
the bottom of the said tube or cylinder with another socket to be
screwed into the steam pipe or other part of the engine required. A
stop-cock may be inserted in this latter socket or not as preferred. In a
recess in the bottom of the screwed socket is inserted a washer of brass
or other suitable material, through which the piston rod passes in order
to steady it, the hole in the said washer to be slightly larger in diameter
than the piston rod so as to allow the lubricant to descend. The
lubricant vessel has also at the top a neck with an opening through
which the tallow or other lubricant may be admitted, such opening
being covered by a brass top screwed on to a leather washer. The said
brass top may be fitted with a brass stop-cock and cup, also for the
purpose of admitting the lubricant if required.
Having thus stated the nature of the said Invention, I will proceed
to describe more particularly in what manner the same is to be per-
formed by reference to the accompanying Drawing, in which is repre-
sented a lubricator composed of the parts herein-before referred to.
In the Figure, which is a vertical section of the lubricator, A is a brass
stop-cock or screw valve; B, B, the small piston and rod; C is a washer
of brass or other suitable material to serve as a guide for the piston rod;
in this washer is formed a hole, which must be large enough to allow
the lubricant to descend from the vessel D, the supply of the lubricant
being regulated by the size of the said hole; D is a vessel of glass or
other suitable material to hold tallow or other lubricant; E is a brass
top or cover (to be used either with or without a stop-cock and cup) to
admit the lubricant, and to the said brass top or cover E, if the
lubricant vessel D is composed of brass, there will be fitted a glass tube
F, up which tube the piston rod B will work and shew when it is
working. Also if the vessel D be composed of brass there will be a
glass guage G fixed on the side of the vessel to shew how much lubricant
the vessel D contains.
Having thus described the nature of the said Invention, and in what
manner the same is to be performed, I hereby declare that what I claim
as of my Invention is, the construction of steam lubricators adapted to
the purposes referred to, and consisting of a small piston and rod
combined with a lubricant vessel for the purpose of supplying lubricant

page_text: to the parts required and regulating the supply thereof in the manner
described.
In witness whereof, I, the said James Purdy Rennoldson, have
hereunto set my hand and seal, the Twenty-first day of April,
in the year of our Lord One thousand eight hundred and
seventy.
JAMES PURDY RENNOLDSON: (L.S.)
Witness,
ELIJAH RYLES,
Wellington Street,
South Shields,.
Engineer.