Improvements in Lamps for Night Lights and the like.
Year: 1893

page_text: Date of Application, 8th Sept., 1893
Complete Specification Left, 7th June, 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Lamps for Night Lights and the like.
I, WALTER CHAMBERS, of 4 Friday Street, in the City of London,
Warehouseman, do hereby declare the nature of this invention to be as follows:-
This invention refers to certain improvements in respect of the lamps for
which I have applied for Letters Patent and which Application is dated October 21st
1892 No. 18816 and comprises modifications whereby i apply to such lamps the
spur wheel arrangement in common use for raising and lowering the wick.
According to this invention 1 make use of a wick tube of extremely small
diameter fitted to carry a single thread of darning cotton or the like and I surround
this concentrically by a larger tube the upper end of which rises above the end of
the wick tube and the diameter of which is such as to allow an air space between
the two tubes and I provide means for the ingress of a current of air between the
two tubes, such for instance as a series of perforations in the outer tube, some of
such perforations being placed preferably about the level of the top of the wick
tube, and others at a lower level.
The lower part of the wick tube is slotted to admit an ordinary spur wheel which
is fitted to act on the wick therein and which is operated by a transverse spindle
with a milled head in the usual manner.
Dated the 8th day of September One thousand eight hundred and ninety
COMPLETE SPECIFICATION.
Improvements in Lamps for Night Lights and the like.
1, WALTER CHAMBERS, late of 4 Friday Street in the City of London, but
How of 72, Isledon Road, Holloway, in the County of London, Warehouseman, 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 refers to certain improvements in the lamps for which I have
applied for Letters Patent, and which Application is dated October 21st 1892
No. 18816 and comprises modifications whereby I apply to such lamps the spur-
wheel arrangement in common use for raising and lowering the wick.
According to this invention I make use of a wick tube of extremely small
diameter fitted to carry a single thread of darning cotton, or the like, and I surround
this concentrically by a larger tube the upper end of which rises above the end of
the wick tube and the diameter of which is such as to allow an air space between
the two tubes and I provide means for the ingress of a current of air between the
two tubes, such for instance as a series of perforations in the outer tube, some of
such perforations being placed preferably about the level of the top of the wick
tube, and others at a lower level upon an enlarged base or dome forming an
increased air space in connection with the outer tube.
The lower part of the wick tube is slotted to admit an ordinary spur-wheel which
is fitted to act on the wick therein and which is operated with a transverse spindle
with a milled head in the usual manner.

page_text: In the accompanying sheet of drawings-
Fig. 1. is an elevation of one of my said lamps.
Fig. 2. is a plan, and Fig. 3. is a vertical central section showing the wick tube
and spur wheel in elevation. These figures are all about or nearly double the
natural size of my lamps for general use and 1 make some of them of yet smaller
dimensions. It will however be obvious that the size of the oil holder is not an
essential feature of my invention.
Fig. 4 is a vertical section of the burner enlarged to twice the size of the other
figures.
Fig. 5 represents a modified form of part of the lamp.
A is the oil holder, the exterior of the nozzle of which is preferably ground and
is slightly tapering to fit into the collar of the burner. b is the collar of the burner.
c is the wick tube made of diameter to carry a single thread of stout darning or
knitting cotton or a woven wick of the same or slightly larger diameter the lower
part of it is slotted to admit the edge of the spur wheel d which is mounted on the
spindle e and operated by means of the milled head f. 9. is a tube surrounding and
concentric with the wick tube and either soldered or otherwise fixed into an
enlarged base or dome g', or made in one piece with it by stamping or otherwise, in
which case the shape is slightly modified as shown in Fig. 5 to facilitate the
operation of stamping, and the length of the wick tube is made to correspond. A
series of perforations for the purpose of admitting air are formed in the upper
part of the tube 9. and in the dome g'. The lower part, of the wick tube c.
passes through and is fixed in a plate h. which is soldered or otherwise fixed to the
collar b. and which plate forms a flange over which the lower edge of the dome g
is bent as shewn in Fig. 4, a similar plate k. supports the upper portion of the wick
tube.
The wick for use in these lamps may be either a single thread of stout darning
or knitting cotton or preferably a woven wick of similar or slightly larger diameters,
and owing to the construction hereinbefore described the flame spreads out at its
base so as to cover or rest on the top of the tube g, and thus receives at its base the
current of air which enters at the holes in 9, and 9', and this mixture of air with
the burning vapour of the oil serves to ensure complete combustion and prevent any
perceptible smoke or smell rising from the flame, thus rendering it admirably
adapted for use in bed rooms and the like. Another feature in these lamps which
assists to render them smokeless and odourless and renders the cost of maintenance
very small, is the very small quantity of oil consumed.
Only oil of good quality should be used in these lamps such as is sold under the
designation of Stranges Al. Crystal Oil or as "Water White" or the like. They
are not adapted or intended for burning benzoline or other bighly inflammable and
dangerous spirits, and with proper oil are in every respect as safe as a common
night light and greatly to be preferred in respect of smell, cleanliness and cost.
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. Lamps for night lights and the like, such as food warmers, "fairy lamps'
and other like purposes constructed and arranged substantially as hereinbefore
described.
2. Lamps with filiform wicks operated by a spur wheel, and having an air tube
with enlarged perforated base or dome surrounding the wick tube whereby the flame
is spread out at its base and rendered nearly smokeless and odourless, constructed
substantially as hereinbefore described and represented.
Dated the 7th day of June 1904.
WALTER CHAMBERS.