An Improved Method of Illuminating by the Electric Arc.
Year: 1893

page_text: Date of Application, 18th Sept., 1893
Complete Specification Left, 16th June, 1 94-Accepted, 8th Sept., 1894
PROVISIONAL SPECIFICATION.
An Improved Method of Illuminating by the Electric Arc.
JAMES JACKSON, 29 Leven Street Pollokshields Glasgow, in the County of
Lanark, Warehouseman and WALTER DIXON, 27 Sandyford Place Glasgow in the
County of Lanark Electrical Engineer do hereby declare the nature of this
invention to be as follows:
Our improved method consists of a screen, channel or case consisting wholly or
in part of opal or obscured glass, so shaped or angled as to secure illumination
where desired. The electric arc, which may or may not be surrounded by a globe
or lantern, is partially or wholly enclosed by the screen, channel or case, the sides
or parts of which may or may not be moveable.
One or more electric arcs may be used in connection with one screen, channel or
case.
The screen, channel or case, while being used for illuminating purposes may also
be wholly or in part applied to illustrative or advertising purposes.
The screen, channel or case may be so modified in shape as to form a lantern to
which the arc lamp may be fixed or detachable.
The lantern and the arc lamp may be either fixed or portable for either inside or
outdoor lighting.
1000
JAMES JACKSON.
WALTER DIXON.
COMPLETE SPECIFICATION.
An Improved Method of Illuminating by the Electric Arc.
JAMES JACKSON, 29 Leven Street, Pollokshields, Glasgow, in the County of
Lanark, Warehouseman, WALTER DIXON, 27 Sandyford Place, Glasgow, in the
County of Lanark, Electrical 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 :-
Our improved method consists of a screen, channel or case, consisting wholly or
in part of opal or obscured glass, or other suitable material, so shaped or angled, as
to secure illumination where desired. The electric arc, (which may or may not be
surrounded by a globe or lantern) is partially or wholly enclosed by the screen,
channel or case, the sides or parts of which may or may not be moveable. One or
more electric arcs, may be used in connection with one screen, channel or case.
The screen, channel or case, while being used for illuminating purposes, may also
be wholly or in part applied to illustrative, or advertising purposes.
The screen, channel or case may be so modified in shape so as to form a lantern,
to which the arc lamp may be fixed or detachable. The lantern and the arc lamp
may be either fixed or portable, for either inside or outdoor lighting. In order that
our invention may be fully understood and readily carried into effect, we will
describe the drawings, reference being had to the figures and letters described
thereon.
Figs. 1 & 2, shew the screen or case.
A being a vertical sheet of opal glass or other suitable material, fixed in a frame,
to which is attached hinge B. To this binge B is attached frame C, in which is
inserted an obscured or other glass sheeting.

page_text: This screen C is made moveable by means of hinge B, and can be placed at any
angle convenient, for illuminating at any desired spot. As shewn on the drawing
the electric ares are placed between A & C, and so are not themselves visible from
below, except through the glass.
Figs. 3, 4, & 5, shew forms of lanterns in which the electric arc is encased.
One or more of the sides or bottom are made moveable for access to the arc.
The parts of the lanterns marked K. are made of opal or other glass for deflecting
the light, the other parts being of ground or otherwise obscured glass.
Fig. 6. shews a case wholly made of glass suitably obscured by grinding or
otherwise, the case being bulbed in the way of the electric arc.
In all these methods, the obscured glass has the effect of removing all shadows,
and thus producing a light which is shadowless.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. Improved method of illuminating by the electric arc, by the use of a screen,
channel or case, constructed wholly or in part of glass or other suitable material,
substantially as hereinbefore described and shown in the accompanying drawings.
2. The several combinations and arrangements of parts for obtaining illumination
in any desired spot, substantially as bereinbefore described and shown in the
accompanying drawings.
3. The arrangement of surrounding the electric are by ground glass or other
obscured medium, in such a manner as to cut off all shadows, substantially as
herein before described and shown in the accompanying drawings.
Dated this 14th day of June 1894.
JAMES JACKSON.
WALTER DIXON.