SUPPLYING GREASE, TALLOW, OR OIL, EITHER WITH OR WITHOUT THE ADDITION OF BLACK LEAD, TO LOCOMOTIVE ENGINES, HORIZONTAL AND BEAM ENGINES, MARINE ENGINES, AND NASMYTH'S PATENT STEAM HAMMER
Year: 1855

page_text: LETTERS PATENT to Joseph Mitchell, Engineer, of Lansdown Road;
Sheffield, in the County of York, for an Invention for "SUPPLYING GREASE,
TALLOW, OR OIL, EITHER WITH OR WITHOUT THE ADDITION OF BLACK LEAD, TO
LOCOMOTIVE ENGINES, HORIZONTAL AND BEAM ENGINES, MARINE ENGINES, AND
NASMYTH'S PATENT STEAM HAMMER."
Sealed the 5th June 1855, and dated the 16th March 1855.
PROVISIONAL SPECIFICATION left by the said Joseph Mitchell at the
Office of the Commissioners of Patents, with his Petition, on the 16th
March 1855.
I, JOSEPH MITCHELL, Engineer, of Lansdown Road, Sheffield, in the County
of York, do hereby declare, the nature of the said Invention for "SUPPLYING
GREASE, TALLOW, OR OIL, EITHER WITHOR WITHOUT THE ADDITION OF BLACK LEAD,
TO LOCOMOTIVE ENGINES, HORIZONTAL AND BEAM ENGINES, MARINE ENGINES, AND
NASMYTH'S PATENT STEAM HAMMER," to be as follows:-
By the use of a brass, cup containing three conical valves, closed by pressure
of steam, and opened by a lever or wheel and pinion, at pleasure, a quadrant
crank, and an eccentrick, either to be self-acting or otherwise, as may be desired,
to be applied to locomotive engines, horizontal and beam engines, marine
engines, and Nasmyth's patent steam hammer. By useing this Invention a
great amount of labour, attention, time, and expence is saved; all dirt and
spirting of grease, tallow, and oil are entirely prevented, and the fireman's
attention superseded.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Mitchell in the Great Seal Patent Office on the
12th June 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPII
MITCHELL, of Sixty-five, Landsdown Road, Sheffield, in the West Riding of
the County of York, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Jer Letters
Patent, bearing date the Sixteenth day of March, in the year of our Lord
One thousand eight hundred and fifty-five, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Joseph Mitchell, Her special licence that I, the said Joseph Mitchell, my
executors, administrators, and assigns, or such others as I, the said Joseph
Mitchell, 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 "APPLYING GREASE, TALLOW, OIL, OR
ANY OTHER LUBRICATING LIQUID, EITHER WITH OR WITHOUT THE ADDITION OF BLACK
LEAD, TO STEAM ENGINE CYLINDERS, CRANKS, SHAFTS, NASMYTH'S PATENT STEAM
HAMMER, AND OTHER MACHINERY," upon the condition (amongst others) that I,
the said Joseph Mitchell, by an instrument in writing under my hand and seal,
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 Patent.
• NOW KNOW YE, that I, the said Joseph Mitchell, 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,
that is to say :-
My Invention is a brass grease cup or lubricator containing three valves,
instead of the taps ordinarily used, which said valves are opened and closed by
a spiral spring, and an expanding catch box containing three inclines, which
are fully shown by the accompanying Drawings.
A is an elevation; B is a cross sectional view, with Drawings representing
the interior workings, specially refered to by the following Figures:-Figure 1
is the top receiver; 2 is the bottom receiver; 3 is the top valve and spindle;
4 is the bottom valve and spindle; 5 is a small valve for air to escape through
the center of top spindle; 6 is an expanding catch box, made expansive by

page_text: turning on three inclines, the top half being attached to valve spindle (3), and
the bottom half attached to valve spindle (4); 7 is a spiral spring for shutting
bottom valve (4); 8 is a loose handle or spanner for turning top spindle;
9 is a catch in bottom spindle, working in a groove, which prevents it from
turning round, but allows it to rise and fall.
The action of this grease cup or lubricator is as herein-under described;
that is to say, the lubricating liquid being poured into the top reciver (1),
it is admitted freely through top valve (3) into bottom receiver (2), the
air escaping through valve (5). By turning top spindle round with loose
handle (8) the catch box is expanded, rising the top spindle till the top valve
(3) is shut; as the top spindle can rise no higher, the motion being continued
untill the box is fully expanded, the bottom spindle is forced down, opening the
bottom valve (4), admitting the lubricating liquid directly into the cylinder;
the steam shutting at the same instant by its own expansive force the air
valve (5).
By the use of my lubricator, the ordinary leaky and wasteful taps are
superceded; and as the bottom valve cannot be opened until top valve is
closed, it is impossible by carelessness or mistake to blow out and thus waste
the grease, as is too frequently the case.
It is also far more effective, as grease can be admitted at any time and in
any quantity. The great superiority of valves over taps when they can be
applied is too well known by all practical men to need further comment.
In witness whereof, I, the said Joseph Mitchell, have hereunto set my
hand and seal, this First day of June, in the year of our Lord One
thousand eight hundred and fifty-five.
JOSEPH (L.S.) MITCHELL.