IMPROVEMENTS IN THE MANUFACTURE OF LUBRICATING GREASE OR COMPOUNDS
Year: 1862

page_text: LETTERS PATENT to Henry Bunning, of Field House, New Cross, Dept-
ford, in the County of Kent, for the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF LUBRICATING GREASE OR COMPOUNDS."
Sealed the 6th May 1862, and dated the 3rd March 1862..
PROVISIONAL SPECIFICATION left by the said Henry Bunning at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
March 1862.
I, HENRY BUNNING, of Field House, New Cross, Deptford, in the County
of Kent, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN THE MANUFACTURE OF LUBRICATING GREASE OR COMPOUNDS," to be as
follows:-
This Invention has for its object improvements in the manufacture of
lubricating grease or compounds, and consists in combining one or more of
those natural mineral oils or matters known as American petrolium, also as
rock oil, Cuba rock oil, and Rangoon oil or earth, with animal or vegetable
oils or grease, or with both, and with an alkaline solution.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Bunning in the Great Seal Patent Office on the 3rd
September 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BUNNING, of Field House, New Cross, Deptford, in the County of Kent, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of March, in the year of our Lord One
thousand eight hundred and sixty-two, in the twenty-fifth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Henry Bunning, Her-special licence, that I, the said Henry Bunning, my
executors, administrators, and assigns, or such others as I, the said Henry
Bunning, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during tho
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 THE MANU-
FACTURE OF LUBRICATING GREASE OR COMPOUNDS," upon the condition (amongst
others) that I, the said Henry Bunning, 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 Patent.
NOW KNOW YE, that I, the said Henry. Bunning, do hereby declare
the nature of the said Invention, and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in the manufacture of
lubricating grease or compounds, and consists in combining one or more of
those natural mineral oils or matters known as American petroleum, also as
rock oil, Cuba rock oil, and Rangoon oil or earth, with animal or vegetable
oils or grease, or with both, and with an alkaline solution.
And in order that my said Invention may be most fully understood and
readily carried into effect I will proceed to describe the manner in which I
prefer to conduct the process.
I take one gallon of American petroleum, rock oil, Cuba rock oil, or
Rangoon oil or carth, and I add thereto two gallons of rosin oil, and in a

page_text: suitable vessel furnished with an agitator or mechanical stirrer I mix the two
well together, and then I put into the vessel with the other materials one
gallon of milk of lime containing about 3 pounds of quicklime, the lime is
partly dissolved and partly held in suspension in the water. The stirrer is
kept in motion for about five minutes after the milk of lime has been added
until the mixture is quite complete. In this manner a material is obtained
having about the consistency of butter, and very suitable for use as railway
grease and for similar lubricating purposes.
The American petroleum, rock oil, Cuba rock oil, or Rangoon oil or earth
employed may be taken in a crude state, and I prefer to take it when its
specific gravity is high, but when it is of low specific gravity I first distil off*
some of its lighter constituents, both to improve the grease and because these
lighter constituents are of considerable mercantile value. In some cases, as
before mentioned, I add to the materials of the lubricating compounds animal
and vegetable oils or grease when a more fluid grease and one suitable for
lubricating machinery driven at high velocities is required. I add to each
ton of grease made as above described, by preference, about eight hundred-
weight of tallow and two hundredweight of palm oil; these I add in a melted
state to the petroleum or other material before adding the milk of lime.
In witness whereof, I, the said Henry Bunning, have hereunto set my
hand and seal, this Third day of September, in the year of our Lord
One thousand eight hundred and sixty-two.
HENRY BUNNING. (L.S.)