Improvements in or connected with Electric Incandescent Lamps.
Year: 1896

page_text: Date of Application, 8th Feb., 1896
Complete Specification Left, 25th Nov., 1896-Accepted, 9th Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in or connected with Electric Incandescent Lamps.
We HERBERT HAMPTON HALL of 126 Duke Street, Liverpool, Electrician
and WILLIAM DAVID CHEYNE of 67 Moscow Drive, Liverpool, Electrical and
Gas Engineer, both in the County of Lancaster do hereby declare the nature of
this invention to be as follows:-
This invention relates to electric incandescent lamps and has for its object the
reflection and the tinting of the light from the incandescent filament in the direction
required in a simple convenient and effective manner.
In carrying out this invention according to one method we flash or coat a portion
of the exterior of the bulb or globe with opal or porcelain or other suitable
substance that can be tinted, so that the light will be concentrated and the rays
reflected from the flashing or coating will tint the direct rays of the filament
passing through the transparent portion of the bulb or globe.
In a modification we may form a close fitting cap of any suitable substance
coated or flashed inside with opal or porcelain, white or tinted as desired.
The globe may with advantage be made longer than usual and of spherical
form.
1
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.
We, HERBERT HAMPTON HALL of 126 Duke Street, Electrician, and WILLIAM
DAVID CHEYNE of 67 Moscow Drive, Electrical and Gas Engineer, both of
Liverpool in the County of Lancashire, 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 electric incandescent lamps and has for its chief object
to reflect some of the rays of the incandescent filament by simple, compact and
effective means.
The invention also contemplates the tinting and reflecting by similar means of
some only of the rays in order to tint the direct rays and produce a faint coloured
light through the mixing of the direct and reflected coloured rays.
According to this invention in some cases the bulb or globe containing the
filament is flashed over about half the surface or shell with opal glass. In other
cases the flashing is made with glass of any desired colour. The globe may with
advantage have its surface where flashed somewhat spherical in order to better
reflect the rays.

page_text: The drawing attached hereunto illustrates in two figures partly in section a globe
of usual form for the electric filament.
In Figure 1 the flashing is represented upon the exterior surface of the globe
and in Figure 2 the flashing is 'represented upon.the, interior surface in one half.
The shaded part a represents the flashing of opal or coloured glass in the two
figures.
The flashing a is preferably applied upon the exterior of the globe, as represented
in Figure 1, but may be produced upon the inside surface.
The globe may be flashed at any desired part.
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 :-
First. In globes for incandescent electric lamps flashing a part of the shell with
opal glass for the purpose of reflecting some of the direct rays from the
incandescent filament substantially as and for the purpose hereinbefore described
"and as illustrated in the drawings.
Second. In globes for incandescent electric lamps flashing a part of the shell
with glass of any, desired. colour for the purpose of reflecting some of the direct
rays from the incandescent filament substantially as and for the purpose herein-
before described and as illustrated in the drawings.
Third. The improvement in globes for incandescent electric lamps substantially
as described and illustrated and for the purpose herein set forth.
Dated this 23rd day of November 1896.
R. J. URQUHART,
57, Barton Arcade, Manchester, and 6, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.