An Improvement in the Construction of Lamps.
Year: 1892

page_text: Date of Application, 6th Sept., 1892
Complete Specification Left, 31st May, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
An Improvement in the Construction of Lamps.
EDWARD JOHN SHAW, Lamp Manufacturer, Astral Works, Hatherton Street,
Walsall, do hereby declare the nature of this invention to be as follows:-
My improvement in lamps, more particularly applies to the construction of wall
hurricane lanterns, for street use, and constructed with air tubes. In an ordinary
lantern the two air tubes proceed from each side of the burner chamber, and exactly
opposite each other. In my improvement 1 place my air tubes not opposite each
other but at an angle of about 40 degrees to each other, and behind the light. By
this means the air tubes do not stand in the way of the light, and a full side light
is obtained, while the efficiency of the air tubes is not diminished. I may use a
protecting hood to my lantern and a hinged globe, or otherwise, as I may see fit.
Dated this 5th day of September 1892.
EDWARD JOHN SHAW.
COMPLETE SPECIFICATION.
An Improvement in the Construction of Lamps.
EDWARD JOHN SHAW, Lamp Manufacturer, Astral Works, Hatherton Street,
Walsall, 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 :-
My improvement in the construction of lamps more particularly applies to the
construction of tubular lanterns or lamps known as "hurricane" lanterns.
They are used for street and outdoor and indoor purposes, and for hanging up
and carrying by hand.
In an ordinary hurricane lantern, the air tubes, connecting the air chamber
under the burner with the "hood" or top of the lantern, are placed exactly opposite
each other.
In my improvement I place my air-tubes not opposite each other but behind the
light or centre of the light, the centre of the light being shown by the dotted
line C, C on plan F.
By this means I avoid the shadow thrown by the two side arms or air-tubes
when they are placed opposite each other and on the centre of light indicated by
the dotted line C. C. as is done in an ordinary lantern where tubes are used.
I may place or fix my arms at any angle within or behind the centre of light;
and I may even have them close together, though I prefer them fixed at angles
to each other varying from 40° to 80° according to the shape and class of
lantern.
I measure my angles from the back of the lantern, marked E on plan F. The
arc marked D on the same plan showing the measuring place of the angles.
The drawing H shows my improvement as a front view, while Fig. F is a sectional
plan of the drawing H, through the line marked A. B., to show the position of the
arms in the special lamp H.
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. The placing of the arms or air-tubes of a tubular or hurricane lantern, behind
TD 077

page_text: the centre of the light in such a lantern and at such angles to each other as to prevent
the side shadows, cast by an ordinary lantern when the arms are fixed opposite to
each other in the ordinary way.
Dated this 30th day of May 1893.
EDWARD JOHN SHAW.