IMPROVEMENTS IN HYDRO
Year: 1880

page_text: LETTERS PATENT to David Pitcairn Wright, of Birmingham, in the County of
Warwick, Manufacturer, for an Invention of
CARBON LAMPS.”
"
IMPROVEMENTS IN HYDRO-
PROVISIONAL SPECIFICATION left by the said David Pitcairn Wright at
the Office of the Commissioners of Patents on the 7th December 1880.
DAVID PITCAIRN WRIGHT, of Birmingham, in the County of Warwick,
Manufacturer. "IMPROVEMENTS IN HYDRO-CARBON LAMPS."
The object of my said Invention is to afford improved facilities for lighting and
cleaning the wicks or burners of hydro-carbon and other lamps.
The arrangements by which this is effected consist of so forming the cone of the
lamp that it sustains and carries both the chimney and moon, and is so constructed
that one side can be sufficiently raised for the purpose of applying a light to the
wick, without removing it entirely, and replaced when alight; or, if desirable, the
cone together with the chimney and moon can be entirely removed, and replaced
after cleaning and lighting.
The
To the lower part of the cone, and beyond the flange (if it has a narrow one),
provide four or more flat radial arms, forming small portions of a broad flange.
One of such arms enters and passes through a slot made in the gallery for that
purpose, and acts as a hinge to the cone; this may be called the back arm.
arm opposite to this projects beyond the gallery in front; this front arm is finished
in a suitable manner to form a convenient handle. The other arms are of shorter
length and do not extend beyond the inside of the gallery. These radial arms act
practically as a single flange and support the moon, and therefor when the finger is
placed under the front arm to raise it the cone, chimney, and moon can be simul-
taneously raised a sufficient height to enable the operator to apply a light to the
burner or burners, and when the front arm is again lowered the operation of
lighting is complete,

page_text: As the back arm fits easily in the slot cut in the gallery it acts as a hinge when
the cone is only partially lifted, and when desirable to remove the cone entirely
for the purpose of cleaning the wick it is effected by simply raising the cone in
front and drawing it forward until this back arm is out of the slot.
The angle to which the cone can be raised (without withdrawing it entirely) is
controlled and limited by the back arm being made to come in contact with the
gallery at the limit of such angle. This limitation of angle is for the purpose of
preventing the breaking of the moon or chimney by their falling out of place.
It is obvious that instead of the four (or more) arms described an entire broad
flange may be used with the front arm or handle and back arm or hinge projecting 1
therefrom.

page_text: 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
7th June 1881.
DAVID PITCAIRN WRIGHT, of Birmingham, in the County of Warwick,
"IMPROVEMENTS IN HYDRO-CARBON LAMPS."
Manufacturer.
The object of my said Invention is to afford improved facilities for lighting and
cleaning the wicks or burners of hydro-carbon and other lamps.
The arrangements by which this is effected consist of so forming the cone of the
lamp that it sustains and carries both the chimney and moon, and is so constructed
that one side can be sufficiently raised for the purpose of applying a light to the
wick without removing it entirely, and replaced when alight; or, if desirable, the
cone together with the chimney and moon can be entirely removed and replaced
after cleaning and lighting.
To the lower part of the cone and. beyond the flange (if it has a narrow one) I
provide two or more flat radial arms, forming small portions of a broad flange.
One of such arms enters and passes through a slot made in the gallery for that
purpose, and acts as a hinge to the cone; this may be called the back arm. The arms
opposite to this projects beyond the gallery in front; this front arm is finished in a
suitable manner to form a convenient handle. The other arms are of shorter length
and do not extend beyond the inside of the gallery. These radial arms act
practically as a single flange and support the moon, and therefore when the finger
is placed under the front arm to raise it the cone, chimney, and moon can be
simultaneously raised a sufficient height to enable the operator to apply a light
to the burner or burners, and when the front arm is again lowered the operation of
lighting is complete.
As the back arm fits easily in the slot cut in the gallery it acts as a hinge when
the cone is only partially lifted, and when desirable to remove the cone entirely
for the purpose of cleaning the wick it is effected by simply raising the cone in
front and drawing it forward until this back arm is out of the slot.
The angle to which the cone can be raised (without withdrawing it entirely) is
controlled and limited by the back arm being made to come in contact with the
gallery at the limit of such angle. This limitation of angle is for the purpose of
preventing the breaking of the moon or chimney by their falling out of place.
It is obvious that instead of the two (or more) arms described an entire broad
flange may be used with the front arm or handle and back arm or hinge projecting
therefrom.
And in order that my said Invention may be more fully understood the
accompanying Drawings are intended to represent the same, as constructed with a
complete broad flange with the usual perforations for the admission of air, in
which Drawings similar letters refer to similar parts in each Figure.
Fig. 1 is a plan view of my improved cone; Fig. 2 is a plan view of the cap;
and Fig. 3 is a perspective view of the cap cone (partially lifted for lighting) with
the moon and chimney in their places. a is the radial arm or hinge which enters
the slot b; c is the other radial arm in front, which acts as a handle for the purpose
of raising the cone for the purposes mentioned.
It is obvious that instead of the flange shewn in the Drawings radial arms or
portions of a flange may be substituted, the mechanical support and effect being
the same in either mode of application.
Having now described the nature and object of my said Invention I declare that
what I claim and desire to be secured to me by the hereinbefore in part recited
Letters Patent is,-
First. The novel construction and formation of the cone of the lamp, as shewn

page_text: on the Drawings, by which it sustains and carries both the chimney and moon
while in the act of lighting the wick.
Second. The general arrangement and combination of mechanism and means for
affording improved facilities for lighting and cleaning the wick or burners of hydro-
carbon and other lamps, substantially as hereinbefore described and shewn on the
Drawings.
In witness whereof, I, the said David Pitcairn Wright, have hereunto set my
hand and seal, this Fourth day of June, in the year of our Lord One
thousand eight hundred and eighty one.
DAVID PITCAIRN WRIGHT. (L.S.)