Improvements in Lamps.
Year: 1892

page_text: Date of Application, 13th Feb., 1892
Complete Specification Left, 12th Nov., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Lamps.
I, JOHN HODGSON LEE, of 41 Grosvenor Road, in the City of Westminster,
Gentleman, do hereby declare the nature of this invention to be as follows :—
Various ways have before been proposed for forming the upper portion of the
wicks of lamps of a material which will not be consumed as the lamp burns.
According to my invention I employ blocks of silicated carbon fitting tightly
within the upper part of the wick tube. For the lower portion of the wick I employ
an ordinary cotton wick fitting tightly within the wick tube and press down on to
it the silicate carbon block so that the top of the cotton wick is brought into and
always remains in contact with the carbon block and no mechanism for raising and
lowering the wick is required. The lamp can be lighted at any time simply by
applying a lighted match to the top of the carbon wick and can be extinguished
either by blowing out the flame or by placing an extinguisher over it. No flame
can possibly pass back into the reservoir of the lamp through the carbon block so
that all danger of explosion is avoided and if the lamp were to be upset little if any
oil would flow from the block the lamp therefore is perfectly safe as well as not
requiring any trimming.
To improve the combustion in lamps burning paraffin and like oils I surround the
flame with a globe or chimney resting on a casing with which the lamp or the upper
part of the lamp is surrounded and cause the air required for combustion to rise up
through this casing. The upper part of this casing I make of a coned forin and to
terminate at the level of the top of the wick tube a narrow space being left between
it and the top of the tube for the passage of air.
Preferably I employ cylindrical wicks with a second air supply up through the
centre of the wick tube and with a button over the top of the tube to deflect this
central air supply against the flame.
Or similarly air may be supplied between two flat parallel wicks.
The bottom of the case may be perforated and an inverted conical funnel be
placed over this bottom to lead air to the bottom of the air supply tube which
passes up through the oil reservoir. The perforations through which air enters to
pass to the exterior of the flame may be made in the sides of the casing just above
this cone--or if desired the casing need not be made to extend down to the bottom
of the lamp but only to surround its upper part.
Dated this 13th day February 1892
COMPLETE SPECIFICATION.
Improvements in Lamps.
I, JOHN HODGSON LEE, of 41 Grosvenor Road, in the City of Westminster,
Gentleman, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
Various ways have before been proposed for forming the upper portion of the
wicks of lamps of a material which will not be consumed as the lamp burns.
According to my invention I employ blocks of silicated carbon fitting tightly
within the upper part of the wick tube. For the lower portion of the wick I
employ ordinary cotton wick fitting tightly within the wick tube and press down on
to it the silicated carbon block so that the top of the cotton wick is brought into
D77

page_text: and always remains in contact with the carbon block and no mechanism for raising
and lowering the wick is required. The lamp can be lighted at any time simply by
applying a lighted match to the top of the carbon wick and can be extinguished
either by blowing out the flamé or by placing an extinguisher over it. No flame
can possibly pass back into the reservoir of the lamp through the carbon block so
that all danger of explosion is avoided and if the lamp were to be upset little if any
oil would flow from the block the lamp therefore is perfectly safe as well as not
requiring any trimming.
To improve the combustion in lamps burning paraffin and like oils I surround the
flame with a globe or chimney resting on a casing with which the lamp or the upper
part of the lamp is surrounded and cause the air required for combustion to rise up
through this casing. The upper part of this casing I make of a coned form and to
terminate at the level of the top of the wick tube a narrow space being left between
it and the top of the tube for the passage of air.
Preferably I employ cylindrical wicks with a second air supply up through the
centre of the wick tube and with a button over the top of the tube to deflect this
central air supply against the flame.
Or similarly air may be supplied between two flat parallel wicks.
The bottom of the case may be peforated and an inverted conical funnel be placed
over this bottom to lead air to the bottom of the air supply tube which passes up
through the oil reservoir. The perforations through which air enters to pass to the
exterior of the flame may be made in the sides of the casing just above this cone-
or if desired the casing need not be made to extend down to the bottom of the lamp
but only to surround its upper part.
Figure 1 is a vertical section of a lamp constructed as above described and having
its outer casing continued down below the bottom of the oil reservoir.
Figure 2 is a vertical section of the same lamp in which the outer casing surrounds
only the upper part of the lamp.
A is the oil reservoir. Ba cylindrical wick tube rising up from it. B' a tube
carried up from the bottom to the top of the reservoir and forming an air passage
through which air may rise up to the interior of the wick tube. Č is a cotton wick
fitting tightly within the wick tube. D is a ring formed of the material known as
silicated carbon blocks of which are commonly used for filtering water. This ring
is pressed down firmly on to the top of the cotton wick and being made to fit tightly
into the wick tube is so kept pressed closely against the cotton wick. The wick tube is
carried by a cap A' which screws into a ring secured to the top of the oil reservoir.
The central portion of this ring is formed as in other lamps of a bad conductor of
heat so as to obstruct the conveyance of heat to the metal top of the oil reservoir.
I is a casing surrounding the lower portion of the lamp. J is a conical shield
surrounding the parts of the lamp which are above the top of the oil reservoir and
fitting to the top of the casing I. I' are openings for admitting air to the. interior
of the casing I. K is an inverted funnel resting on the bottom of the casing I.
I' are openings by which air is admitted into the casing and led by the inverted
funnel to the bottom of the tubular passage B¹ and so to the interior of the burner.
J' is the glass chimney carried by a ring or gallery extending out from the conical
shield J. Jare small holes formed through this ring to allow a thin film of air to
rise up all around the interior of the glass chimney to keep the glass from becoming
too highly heated.
I is a screw cap closing the hole through which the reservoir is filled with oil.
L' is a small hole formed through it for the admission of air to the interior of the
reservoir. Mis an ordinary flat disc or button carried by a stem M' from the cap A¹.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Forming the upper part of the wicks of-lamps of the-material known_as
silicated carbon.

page_text: 2. The combination of a cylindrical wick tube carrying at the top a ring of
material which will not be consumed and below this a wick of cotton or like
material, an oil reservoir, an air admission tube passing down through the centre of
the oil reservoir and a conical shield extending over the top of the oil reservoir and
leading a stream of air against the exterior of the flame substantially as described.
3. The combination of a wick tube carrying at the top a block of material which
will not be consumed and below this a wick of cotton or like material, an oil
reservoir and a conical shield extending over the top of the oil reservoir and leading
a stream of air against the exterior of the flame substantially as described.
Dated this 12th day of November 1892.
CARPMAEL & Co.,
Agents for the Applicant.