Improvements in Electric Lighting.
Year: 1894

page_text: Date of Application, 25th Apr., 1894
Complete Specification Left, 25th Feb., 1895-Accepted, 30th Mar., 1895
Improvements in Electric Lighting.
I JAMES GEORGE WILLCOX ALDRIDGE, of 9 Victoria Street, Westminster,
in the County of London, Civil Engineer, do hereby declare, the nature of this
invention to be as follows :-
This invention for improvements in electric lighting has for its object to provide
a simple and efficient means of regulating the light to requirement; and consists
essentially in mounting two lamps of different candle power on opposite sides of a
switch fitting by which either lamp or both lamps in series or both lamps in parallel
can be put into circuit at pleasure, or both lamps cut out of the circuit. Preferably
the switch is of the cylindrical or plug type with the contact strips arranged round
the circumference.
Dated this 25th day of April 1894.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
Improvements in Electric Lighting.
JAMES GEORGE WILLCOX ALDRIDGE, of 9 Victoria Street, Westminster
in the County of London Civil 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 for improvements in electric lighting has for its object to provide
a simple and efficient means of regulating the light to requirement; and consists
essentially in mounting two lamps of different cnudle power on opposite sides of
a switch fitting by which either lamp or both lamps in series or both lamps in
parallel can be put into circuit at pleasure, or both lamps cut out of the circuit.
Preferably the switch is of the cylindrical or plug type with the contact strips
arranged round the circumference.
In the accompanying sheet of illustrative drawings;-
Fig. 1 is a front elevation of a duplex lamp for ships use, arranged according to
this invention.
Fig. 2 is an elevation of a modification in which the switch forms part.
Figs. 3 and 4 are detail views of a suitable three way switch.
C
The two electric lamps a bare situated in one globe c and are secured to the two
way fitting d. The globe c is attached by means of ordinary holders which are
hinged or jointed at e and whose free ends are forced up or down as the screw is
screwed in or out. The switch has two metallic contacts and one insulated part
so that the lamps can be arranged simple, parallel, or in series. In this case the
lamps are supposed to be of equal power. An ordinary switch is employed for
turning the light off and on. If desired a single switch may be employed for both
turning the lamp off and on and regulating the light.

page_text: 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. Mounting two electric lamps on a single fitting and connecting them to a
switch so that they can be employed single parallel or in series substantially as
described for the purpose specified.
2. Mounting two electric lamps on a single fitting and connecting them to two
switches one of which is used only to turn the current off and on and the other only
to regulate the light, substantially as described for the purpose specified.
Dated this 25th day of February 1895.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.