Improvements in Apparatus for Producing Light.
Year: 1891

page_text: Date of Application, 6th Feb., 1891
Complete Specification Left, 5th Nov., 1891-Accepted, 5th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Producing Light.
I, JOSEPH GEORGE HUDSON, of 4 Randolph Gardens, Maida Vale, in the
County of Middlesex, Gentleman, do hereby declare the nature of this invention to
be as follows:-
This invention relates to that class of apparatus in which magnesium or other
powder is blown through a flame.
The apparatus is provided as is usual with an elastic ball by which a puff of air
can be produced but in place of having a single ball as is customary I have two
balls connected together, the outermost acting as a pump whilst the inner one
forms a reservoir into which the air may be compressed, so that, if desired, the
light can be caused to burn for a considerable time a cock being provided to
regulate the flow of air. A tube from this ball leads to a chamber at one end of
the apparatus which is filled with cotton wool to prevent the escape of the powder.
A tube from this chamber passes partly through the lower part of a reservoir of
the powder but stops short of the other side of the reservoir where the outlet is
situated, so that the air has to pass a certain distance through the powder in the
reservoir before it reaches the outlet, the result being that cach time the ball is
suddenly squeezed a cylinder of powder of about the same diameter as the tube
is carried out by the puff of air whilst a gradual flow of air carries out the
powder slowly and evenly. The outlet consists of a tube or chamber having a
comparatively large opening into the reservoir and a comparatively small opening
at its other end, where it is connected to the exit pipe the effect of this is to cause
the air to eddy thoroughly mixing the powder with it and breaking up any lumps
which may exist. The exit pipe conveys the mixed air and powder to the flame.
Preferably I employ a flame produced by the combustion of naphtha or like
material in a bowl surrounding the pipe, the bowl however should be separated
from the pipe by a non-conductor of heat. This is of importance as otherwise the
powder is apt to cake.
In some cases I connect two burners to a single blowing apparatus.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Producing Light.
I, JOSEPH GEORGE HUDSON of 4 Randolph Gardens, Maida Vale, in the
County of Middlesex, 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 :—
This invention relates to that class of apparatus in which magnesium or other
powder is blown through a flame.
The apparatus is provided as is usual with an elastic ball by which a puff of air
can be produced but in place of having a single ball as is customary I have two
balls connected together, the outermost acting as a pump whilst the inner one forms
a reservoir into which the air may be compressed, so that, if desired, the light can
be caused to burn for a considerable time a cock being provided to regulate the
flow of air. A tube from this ball leads to a chamber at one end of the apparatus
which is filled with cotton wool to prevent the escape of the powder. A tube

page_text: from this chamber passes partly through the lower part of a reservoir of the
powder but stops short of the other side of the reservoir where the outlet is
situated, so that the air has to pass a certain distance through the powder in the
reservoir before it reaches the outlet, the result being that each time the ball is
suddenly squeezed a cylinder of powder of about the same diameter as the tube is
carried out by the puff of air whilst a gradual flow of air carries out the powder
slowly and evenly. The outlet consists of a tube or chamber having a comparatively
large opening into the reservoir and a comparatively small opening at its other end,
where it is connected to the exit pipe the effect of this is to cause the air to eddy
thoroughly mixing the powder with it and breaking up any lumps which may exist.
The exit pipe conveys the mixed air and powder to the flame. Preferably I employ
an annular flame and introduce the powder at the middle.
In some cases connect two burners to a single blowing apparatus.
DESCRIPTION OF THE DRAWING.
The drawing shows a vertical section of an apparatus constructed according to
this invention.
A is a ball serving the office of a pump or bellows it is provided at one end with
a valve A whilst its other end is connected by a tube to the ball B which forms
an air reservoir there being a non-return valve between the two balls. These
appliances are well known in connection with spray producers and require no
further description. The other end of the ball is connected to the pipe C
provided with a cock C. The pipe C is connected to a tube D whose inner end is
of smaller diameter to form a nozzle which enters the lower part of the powder
reservoir E. The tube D may be loosely filled with cotton wool to prevent the
entrance of powder. E' is the outlet from the reservoir and F is the outlet pipe fixed
to its upper end, and passing up through the wick tube of an ordinary lamp. J is
a guard plate to prevent the powder from falling on to the lamp. The whole
apparatus pivotted as shown to a stand K.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is
1. The combination of an apparatus for producing a steady blast of air, a pipe
leading the air into a reservoir containing powder and an outlet from the reservoir
leading to a flame substantially as described.
2. In apparatus such as is referred to in the preceding claim the reservoir for
powder substantially as described and shown in the drawings.
3. Apparatus for producing light substantially as described and shown in the
drawings.
Dated this 2nd day of November 1891.
JOSEPH GEORGE HUDSON.