AN IMPROVED METHOD. AND ARRANGEMENT FOR FILLING AND INDICATING WHEN FULL PETROLEUM AND OTHER LAMPS
Year: 1874

page_text: LETTERS PATENT to David Pitcairn Wright, of Birmingham, in the
County of Warwick, Manufacturer, for the Invention of "AN IMPROVED
METHOD. AND ARRANGEMENT FOR FILLING AND INDICATING WHEN FULL
PETROLEUM AND OTHER LAMPS."
"
PROVISIONAL SPECIFICATION left by the said David Pitcairn Wright
at the Office of the Commissioners of Patents, with his Petition,
on the 4th April 1874.
I, DAVID PITCAIRN WRIGHT, of Birmingham, in the County of
Warwick, Manufacturer, do hereby declare the nature of the said
Invention for "AN IMPROVED METHOD AND ARRANGEMENT FOR FILLING AND
INDICATING WHEN FULL PETROLEUM AND OTHER LAMPS," to be as follows:
Through the body of a circular wick burner in the part left open at
the side for the supply of the central air current I place a tube right
through the body and open to the oil vessel, and through which the
oil is easily poured into the oil vessel or reservoir of lamp. On the
centre of the burner at the bottom in the part that screws into the oil
vessel we affix a tube nearly closed at the end, in which we place a piece
of cork, hollow brass, or any kind of float, from the top of which a wire
I

page_text: projects through the central pin of the burner that immediately rises
when the oil reaches the float, and indicates that sufficient oil has been
poured in into the vessel.
For flat wick burner I also place a tube of metal through the body of
the burner on one side of the wick case, and through which the oil vessel
can be filled, and I also carry down the wick case considerably below
the bottom of the burner, and attach thereto a semicircular piece of
metal, thus making a semicircular tube, and in this I place the float, as
above described, and from the float a wire, which projects some little
distance in the body of the lamp underneath the cone, which indicates
when the oil in the oil vessel has attained the requisite height.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said David Pitcairn Wright in the Great Seal Patent
Office on the 3rd October 1874.
TO ALL TO WHOM THESE. PRESENTS SHALL COME, I, DAVID
PITCAIRN WRIGHT, of Birmingham, in the County of Warwick, Manu-
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing-date the Fourth day of April, in the year of our
Lord One thousand eight hundred and seventy-four, in the thirty-seventh
year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said David Pitcairn Wright, Her special licence
that I, the said David Pitcairn Wright, my executors, administrators,
and assigns, or such others as I, the said David Pitcairn Wright, my
exccutors, 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 "AN IMPROVED
METHOD AND ARRANGEMENT FOR FILLING AND INDICATING WHEN FULL PETROLEUM
AND OTHER LAMPS," upon the condition (amongst others) that I, the said
David Pitcairn Wright, 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

page_text: 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.
NÓW KNOW YE, that I, the said David Pitcairn Wright, 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 :-
Through the body of a circular wick burner in the part left open at
the side for the supply of the central air current I place a tube right
through the body and open to the oil vessel, and through which the oil
is easily poured into the oil vessel or reservoir of lamp. On the centre
of the burner at the bottom in the part that screws into the oil vessel I
affix a tube nearly closed at the end in which I place a piece of cork, ¯
hollow brass, or any kind of float, from the top of which a wire projects
through the central pin of the burner that immediately rises when the
oil reaches the float, and indicates that sufficient oil has been poured in
into the vessel.
For flat wick burner I also place a tube of metal through the body of
the burner on one side of the wick case, and through which the oil
vessel can be filled, and I also carry down the wick case considerably
below the bottom of the burner, and attach thereto a semicircular piece
of metal, thus making a semicircular tube, and in this I place the float,
as above described, and from the float a wire, which projects some little
distance in the body of the lamp underneath the cone, which indicates
when the oil in the oil vessel has attained the requisite height.
Having thus described the nature of my said Invention I declare that
what I claim and desire to be secured to me by the herein-before in part
recited Letters Patent is, the improved method and arrangement for
filling and indicating when full petroleum and other lamps, substantially
as herein-before described, or any mere modification thereof.
In witness whereof, I, the said David Pitcairn Wright, have hereunto
set my hand and seal, this First day of October, in the year
of our
Lord One thousand eight hundred and seventy-four.
DAVID PITCAIRN WRIGHT. (L.S.)