Improvements in Central Draught Oil Lamps.
Year: 1894

page_text: Date of Application, 4th May, 1894
Complete Specification Left, 4th Feb., 1895-Accepted, 23rd Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Central Draught Oil Lamps.
I HOWARD WALKER, of Inglesant, Cotton Lane, Moseley, near Birmingham,
Manager of Works, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in central draught oil lamps and refers
more particularly to the construction and arrangement of the flame spreader or
parts adjacent thereto, and having for its primary object, means by which the supply
air shall be heated to a very high temperature before it comes in contact with
the flame.
To effect this, I make the spreader of a conical or inverted dished shape, whose
outer edge is preferably somewhat larger in diameter than the diameter of the flame,
such edge being further preferably of a rolled over or well rounded shape. In some
instances I further provide a bottom to such inverted dished or conical shape, and
provide annular circumferential perforated holes either in such bottom or around
the side, or both, so that the air may escape thereat and supply the flame.
By these means the central supply of air is heated to a very high temperature
ere it reaches the flame and thereby the combustion is made more complete and the
flame much brighter and intense.
Dated this 3rd day of May 1894.
CHARLES T. POWELL,
Applicant's Agent.
Improvements in Central Draugas.
I HOWARD WALKER, of Inglesant, Cotton Lane Moseley, near Birmingham,
Manager of Works, 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 :-
This invention relates to improvements in central draught oil lamps and refers
more particularly to the construction and arrangement of the flame spreader or
parts adjacent thereto, and having for its primary object, means by which the supply
air shall be heated to a very high temperature before it comes in contact with
the flame.
To effect this, I make the spreader of a conical or inverted dished shape, whose
outer edge is preferably somewhat larger in diameter than the diameter of the
flame, such edge being further preferably of a rolled over or well rounded shape.
In some instances I further provide a bottom to such inverted dished or conical
shape, and provide holes either in such bottom or around the side, or both, so that
the air may escape thereat and supply the flame.
In order to more particularly explain this my invention, I have appended
hereunto an illustrative sheet of drawings upon which are figures and numbers of
reference, similar numbers referring throughout the several views to the same
thing or part.

page_text: Fig. 1, shows a sectional view of this my invention.
Fig. 2, is a detached detail sectional elevation and Fig. 3, a plan of the
spreader.
Fig. 4, is a detail sectional view of a modification of the spreader.
Referring to Figs. 1, 2 and 3 ;-the spreader 6, is of a conical or inverted dished
shape, whose outer edge 7 is somewhat larger in diameter than that of the wick
tube 8. This spreader is carried from the central draught tube 9 as follows:-
10 is a short glass tube fitting into the draught tube and upon the upper end of
this glass tube is passed the mount 11, from which the arms 12, extend to hold the
spreader 6, in its place. Other suitable means may however be adopted by which
the said spreader may be held in its position.
At 13, 13, are perforations or openings through which the air, after passing up
the central tube, may pass to the interior of the flame. The precise shape of this
chambered like spreader may be varied although I find that shown to be convenient
and useful. The glass tube 10 forms a medium of non-conducting material between
the spreader and the tube 9, and the adjacent parts of the burner 14, and oil con-
tainer. Usually this spreader 6, is of china or other similar non-conducting
material, but may be of inetal if desired. Also in some instances the said spreader
and the mount that is its inner lower part, may be connected together, as for instance
as shown at 6, in the modification illustrated in Fig. 4, in which case I may make
outlet perforations at 15 and 16.
By these means the cold air from the exterior in its passage up the tube 9, and
while contained in the interior of the spreader 6, takes up a large portion of the
heat to which these parts are subjected and is thus heated to a very high temperature
when it is presented to the flame, and by this regenerative action, the combustion
is made more complete and the flame much brighter and intense.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what
1 claim is :-
1. In central draught oil lamps, the combination with the central tube 9, and
such other parts necessary to constitute the burner or lamp, of the hollow or
chambered spreader 6, constructed and arranged substantially as described and
illustrated.
2. The combination in central draught oil lamps with the burner 14, wick tube 8,
draught tube 9, of the intervening glass tube 10, substantially as described and
shown.
Dated this 2nd day of Wabru 1805
CHARLES T. POWELL,
Applicant's Agent.