Improvements in or relating to Miners' Safety Lamps.
Year: 1891

page_text: Date of Application, 11th Aug., 1891
Complete Specification Left; 11th May, 1892-Accepted, 25th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in or relating to Miners' Safety Lamps.
I, JAMES ASHWORTH, of Morley, near Derby, in the County of Derby, Mining
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to further improvements in the burners of miners safety
lamps for the burning of oil or of benzoline colzaline or other spirit.
It consists essentially in constructing the wick tube of a corrugated three
cornered four cornered or cruciform shape and for burning benzoline colzaline or
deodorized spirit placing a small tube in the centre thereof to carry off vapour and
relieve the pressure and for burning petroleum forming an enclosed chamber
around the wick tube over the oil reservoir and leading the small tube therefrom
to the atmosphere.
In carrying out the invention form the wick tube corrugated with three or
four corners giving it a star or cruciform shape in cross section.
For burning spirit I place the escape tube for carrying off vapour up through
the centre of the three cornered wick tube so that any vaporized spirit rises
therethrough to the flame where it is burnt relieving any pressure in the reservoir
I at present prefer to form this tube curved at the bottom to prevent anything but
the vapour passing up it. In some cases however it may be found better to place
the escape tube outside the wick tube and 1 also find that for circular burners an
escape tube in the centre or along the side of the burner may also be used.
regulating the height of the flame the wick tube will be provided with a sliding or
telescopic tube surrounding it by moving which up or down the height of the flame
will be regulated.
For
For burning petroleum oil the three cornered wick tube is preferably made
without the telescopic sliding piece and a dome shaped piece is fitted tightly down
upon a flange or collar soldered round the wick tube thus forming a chamber
through which the wick tube passes. The small escape tube enters this chamber
and draws off the vapour therefrom either to the atmosphere or to the flame if so
desired.
The top of the wick tube may be turned over for about an eighth of an inch or
so to provide a narrow surface for the telescopic tube to slide upon.
Dated this 10th day of August 1891.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
.
COMPLETE SPECIFICATION.
Improvements in or relating to Miners' Safety Lamps.
I, JAMES ASHWORTH, of Morley, near Derby, in the County of Derby, Mining
Engineer, 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 further improvements in the burners of miners safety
lamps for the burning of oil or of-benzoline, colzaline, or other spirit.
It consists essentially in constructing the wick tube of a corrugated three
cornered four cornered or cruciform shape which for burning benzoline, colzaline or
deoderized spirit is formed with a small tube in connection therewith to carry off
vapour and relieve the pressure, and for burning petroleum is formed with an

page_text: enclosed chamber around the wick tube over the oil reservoir through which the
small tube passes to the atmosphere.
The invention will be fully described with reference to the accompanying
drawings.
Fig. 1. front elevation of the reservoir and burner of a lamp.
Fig. 2. sectional elevation.
Fig. 3. plan.
Fig. 4. perspective view of wick tube.
Fig. 5. perspective view of wick tube-modified form.
The reservoir A of the lamp for either oil or spirit and the wire B for raising
the wick are of any ordinary form.
The wick tube C1 form corrugated or indented at the sides with three or more
corners giving it a star or cruciforin shape in cross section.
For burning spirit I carry the safety or vapour escape tube D for carrying off
any vapour which may accumulate in the reservoir A from the volatilization of
the spirit up along side the wick tube so that any vapourized spirit rises there-
through to the flame where it is burnt relieving any pressure in the reservoir.
The safety or escape tube D may be straight as shown or curved or bent at the
bottom to prevent any spirit passing up with the vapour. The safety or escape
tube D may be placed along the outside of the wick tube C as shown or it may be
placed in the centre of wick tube.
The safety or escape tube D may also be used with the ordinary or cricular
burners either placed along the outside or in the latter case in the centre whereby
any vapour arising from the spirit or oil in the reservoir A is drawn off and
brought up to the flame and burnt, and any pressure which would force the spirit
or oil up the wick tube is prevented or relieved.
To regulate the height of the flame when burning spirit the wick tube C may be
provided with a sliding or telescopic tube surrounding it by moving which up or
down the height of the flame can be regulated.
The top of the wick tube may be turned over for about an eighth of an inch or
so to provide a narrow surface for the telescopic tube to slide upon.
For burning oil the telescopic sliding tule may be dispensed with and the wick
tube C is formed with two collars ce soldered round it over which a cap E of
dome or other shape is fitted tightly down upon the collars or flanges cc' thus
forming an enclosed chamber through which the wick tube passes. The safety or
escape tube passes through this chamber and carries off any vapour either
therefrom or from the reservoir below.
Having now particularly described and ascertained the
invention, and in what manner the same is to be performed,
I claim is —
nature of the said
declare that what
1. A wick tube for miners safety lamps formed corrugated or indented at the
sides of star or cruciform shape with three or more corners substantially as
described.
2. In miners safety lamps the combination with the wick tube of a safety escape
tube attached or connected thereto whereby any vapour generated in the reservoir
is drawn off and brought up to the flame to be burnt substantially as described.
Dated this 10th day of May 1892.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.