IMPROVEMENTS IN THE ANDED OTT.
Year: 1872

page_text: LETTERS PATENT to William Thomas Harvey, of Northgate Street, in
the City of Chester, for the Invention of "IMPROVEMENTS IN THE
ANDED OTT. "
Sealed the 6th June 1873, and dated the 11th December 1872.
PROVISIONAL SPECIFICATION left by the said William Thomas Harvey
at the Office of the Commissioners of Patents, with his Petition,
on the 11th December 1872.
I, WILLIAM THOMAS HARVEY, of Northgato Street, in the City of
Chester, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN THE CONSTRUCTION OF LAMPS FOR BURNING MINERAL AND OTHER
OILS," to be as follows:-
-
This Invention consists of certain improvements in the construction of
lamps for burning mineral and other oils, and which are especially
applicable to lamps which are suspended, such as those arranged in
chandeliers, and ships' lamps, and also to bracket lamps in which
mineral oils are used, the necessity for reservoirs at the ends of the arms
in such lamps, as the same have hitherto been ordinarily constructed,
being obviated.

page_text: A hollow spherical ball is suspended freely by means of two pins
mounted in suitable bearings in a semi-spherical cup, to which cup the
arms for the supply of oil to the burners are attached. The hollow
spherical ball is the reservoir for containing the oil, and is provided with
two apertures, one for the admission of the requisite supply of oil, and
the other, which is smaller, for the exit of air whilst the reservoir is
being filled.
When the lamp is to be placed in the condition required for the pur-
pose of lighting, the hollow spherical ball or reservoir is reversed in
position, whereupon the oil flows through the larger aperture therein
into the semi-spherical cup until it rises so as to cover the air hole, upon
which the flow ceases, and the oil will have reached its proper level in
the burners to which it is conveyed by the before mentioned arms. As
the oil is consumed, it again exposes the air hole, thus causing another
outflow of oil, and so keeping up a continuous supply at a proper level
in the burners.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Thomas Harvey in the Great Seal Patent
Office on the 9th June 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM:
THOMAS HARVEY, of Northgate Street, in the City of Chester, send
greeting..
•
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of December, in the year
of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Thomas Harvey, Her special
licence that I, the said William Thomas Harvey, my executors, adminis-
trators, and assigns, or such others as I, the said William Thomas Harvey,
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
THE CONSTRUCTION OF LAMPS FOR BURNING MINERAL AND OTHER OIs,”. upon

page_text: the condition (amongst others) that I, the said William Thomas
Harvey, 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 William Thomas Harvey, 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 said Invention consists in certain improvements in the con-
struction of lamps for burning mineral and other oils, and which are
especially applicable to lamps which are suspended, such as those
arranged in chandeliers, and ships' lamps, and also to bracket lamps, in
which mineral oils are used, the necessity for reservoirs at the ends of
the arms in such lamps, as the same have been ordinarily constructed,
being obviated.
A hollow spherical ball constructed of suitable material is suspended
freely by means of two pins mounted in bearings in a semi-spherical
cup, to which cup the arms for the supply of oil to the burners are
attached. The hollow spherical ball is the reservoir for containing the
oil, and is provided with two apertures respectively fitted with valves, one
being for the admission of the requisite supply of oil, and the other,
which is smaller, for the exit of air whilst the reservoir is being filled.
Such valved apertures are in that part of the spherical ball which is
uppermost when the lamp is not required to be in use.
When the lamp is to be placed in the condition required for the pur-
poses of lighting, the hollow spherical ball or reservoir is reversed in
position, the valves remaining closed until the reversal is nearly com-
pleted, whereupon the oil flows through the larger aperture into the
semi-spherical cup until it rises so as to cover the air hole, upon which
the flow ccases, and the oil will have reached its proper level in the
burners, to which it is conveyed by the before mentioned arms. As the
oil is consumed the air hole is again exposed, thus causing another out-
flow of oil, and so keeping up a continuous supply at a proper level in
the burners.

page_text: Having thus declared and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I would observe in
conclusion that what I consider novel and original, and therefore claim as
constituting the Invention secured to me by the said herein-before in
part recited Letters Patent is, the combination and arrangement of parts
and mechanism, substantially as and for the purposes herein-before
..