IMPROVEMENTS IN NIGHT LIGHTS
Year: 1875

page_text: LETTERS PATENT to Samuel Clarke and Samuel Birdsey Clarke, both
of 110, Albany Street, Regent Street, in the County of Middlesex,
for the Invention
N"
PROVISIONAL SPECIFICATION left by the said Samuel Clarke and
Samuel Birdsey Clarke at the Office of the Commissioners of Patents,
with their Petition, on the 24th February 1875.
We, SAMUEL CLARKE and SAMUEL BIRDSEY CLARKE, both of 110,.
Albany Street, Regent Street, in the County of Middlesex, do hereby.
declare the nature of the said Invention for "IMPROVEMENTS IN NIGHT
LIGHTS," to be as follows:-
This Invention has for its object improvements in night lights.
In the manufacture of the night lights known as Clarke's night lights,
Patented April 1857, No. 961, tallow is the material employed. The
high temperature which this material will bear admits of the night light
being burnt under a glass shade and used as a food warmer for which

page_text: other night lights are not suitable. The tallow however has this disad-
vantage, that when kept for a long time it is liable to become rancid,
now we prevent this by mixing camphor with the tallow with which
night lights are made. We employ about 30 part of camphor, more
or less; night lights made from this compound will keep for a much
longer period.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Clarke and Samuel Birdsey Clarke in the
Great Seal Patent Office on the 23rd August 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, SAMUEL
CLARKE and SAMUEL BIRDSEY CLARKE, both of 110, Albany Street,
Regent Street, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of February, in
the year of our Lord One thousand eight hundred and seventy-five, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Samuel Clarke and Samuel
Birdsey Clarke, Her special license that we, the said Samuel Clarke and
Samuel Birdsey Clarke, our executors, administrators, and assigns, or
such others as we, the said Samuel Clarke and Samuel Birdsey Clarke,
our 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 NIGHT LIGHTS," upon the condition (amongst others)
that we, the said Samuel Clarke and Samuel Birdsey Clarke, our executors
or administrators, by an instrument in writing under our or their hands
and seals, or under the hand and seal of one of us or them, 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.

page_text: NOW KNOW YE, that I, the said Samuel Clarke, on behalf of myself
and the said Samuel Birdsey Clarke, do hereby declare the nature of
the said Invention, and in what manner the same is to be 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 night lights.
In the manufacture of the night lights known as Olarke's night lights,
Patented April 1857, No. 961, tallow is the material employed. The
high temperature which this material will bear admits of the night light
being burnt under a glass shade and used as a food warmer for which
other night lights are not suitable. The tallow however has this dis-
advantage, that when kept for a long time it is liable to become rancid,
now we prevent this by mixing camphor with the tallow with which
night lights are made. We employ about 30th part of camphor, more
or less. Night lights made from this compound will keep for a much
longer period.
To prepare tallow with camphor we melt 1 ton of tallow with 2
gallons of water at a temperature of about 180 degrees, then we draw it
off into a settling vat and allow it to stand for 2 hours. We turn the
refined tallow into melting pan again, adding say 8 ounces camphor to
every 112 lbs. and get it up to the same heat as before, stirring well
all the time, then we draw the prepared tallow off into clean or settling
vat and allow it to settle two hours, it is then fit for use.
What we claim is the manufacture of night lights from tallow prepared
with camphor, substantially as described.
In witness whereof, I, the said Samuel Clarke, have hereunto set
my hand and seal, this Seventh day of August, in the year of
our Lord One thousand eight hundred and seventy-five.
SAMUEL CLARKE. (L.S.)