Improvements connected with Electric Lamps and Switches.
Year: 1898

page_text: Date of Application, 10th Jan., 1898
Complete Sponification Latt 7th Out 1000 Aesented
Red Ano
1000
PROVISIONAL SPECIFICATION.
Improvements connected with Electric Lamps and Switches.
I, WILLIAM MILLER WALTERS, of 7 and 9, Portland Street, Liverpool, in the
County of Lancaster, Manufacturer, do hereby declare the nature of this inven-
tion to be as follows:-
The object of this invention is to provide appliances simple in construction,
easily fixed and convenient in operation whereby the illumination in a room may
be regulated so that a light equal to say a night light may be left on when a slight
illumination only is desired thereby obviating the necessity of using the full
power of an ordinary incandescent lamp as is at present the case when any illumi-
nation however slight is required.
For these purposes I make use of a small incandescent lamp carried on or in
the switch box and provided with the usual contact pieces and leads, and I so
arrange the switch lever that when the main lamp or lamps is or are switched
off the small lamp is switched into a secondary shunt circuit on one of the main
leads thereby providing sufficient illumination to serve as a night light. A further
movement of the switch lever cuts off the small lamp from the said secondary
shunt circuit. Instead of a separate small lamp being used the switch may be
so arranged as to switch the main lamp off the main circuit and into the secondary
shunt circuit thereby reducing the illumination to any desired degree; and also
instead of a secondary shunt circuit being used for the small lamp the circuit
which serves the main lamp may be used, the small lamp being switched into the
circuit in place of the main lamp suitable adjustments being made to enable the
small lamp to stand the power of the current which supplies the main lamp.
I prefer to enclose the switch and small lamp in a glass cover or case to prevent
damage to the lamp.
COMPLETE SPECIFICATION.
Improvements connected with Electric Lamps and Switches.
I, WILLIAM MILLER WALTERS, of 7 and 9, Portland Street, Liverpool, in the
County of Lancaster, Manufacturer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had to the
accompanying drawings:
The object of this invention is to provide appliances, simple in construction,
easily fixed, and convenient in operation, whereby the illumination in a room may
be regulated, so that a light equal to say a night light may be left on when a
slight illumination only is desired, thereby obviating the necessity of using the
Den 817

page_text: full power of an ordinary incandescent lamp as is at present the case when any
illumination however slight is required.
For these purposes I make use of a small incandescent lamp carried in the
switch box and provided with the usual contact pieces and leads and I so arrange
the switch lever that when the main lamp or lamps is or are switched off, the
small lamp is switched into the circuit in place of the main lamp, suitable adjust-
ments of resistance being made to enable the small lamp to stand the power of
the current which supplies the main lamp, thereby providing sufficient illumina-
tion to serve as a night light. A further movement of the switch lever cuts off
the small lamp from the circuit.
I prefer to enclose the switch and small lamp in a glass or transparent cover
or case to prevent damage to the lamp.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a plan of a combined switch box and small lamp under my invention,
and Fig. 2 is a side view of the same, the cover being in section.
a is the base piece of the switch box, a is the cover either wholly or partly of
glass and sufficiently strong to protect the lamp enclosed thereby from damage,
b is a wire leading from the main circuit to the switch lever, c is the switch lever
free to turn on a pivot d, cl turnbutton for operating the switch lever e is a contact
piece to which is attached a wire f leading to one terminal of the small lamp 9,
secured on the base piece a. Suitable adjustments of resistances are made in this
circuit when required to enable the small lamp to be used. 6' is a wire leading
from the other terminal of the small lamp to the return main circuit, h is a con-
tact piece to which is attached a wire i leading to one terminal of the main lamp,
is a wire leading from the other terminal of the main lamp to the wire b¹ and
thence to the return main circuit. j is a curved piece having notches j¹ into which
a spring piece k on the switch lever c can fall so as to hold the switch lever opposite
to either of the contact pieces e or h making contact therewith and thereby putting
either the small lamp or the main lamp into circuit as desired. The operation is
as follows: In the position of the switch lever c shown in Fig. 1 both small and
main lamps are out of circuit and there is no illumination. When the switch
lever is moved opposite the contact piece e the small lamp g is put into circuit
thereby providing sufficient illumination to enable the switch box to be easily seen
and also to serve as a night light if the lamp g is made sufficiently powerful.
When it is desired to have full illumination, the switch lever is moved opposite
the contact piece h thereby putting the main lamp into circuit and cutting out the
small lamp g.
In the above arrangement the small lamp is put into circuit between the leads
in the same way as, but in place of, the main lamp.
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:-
First. A switch box provided with a glass or transparent cover and a small
incandescent lamp within such cover substantially as and for the purposes set
forth.
Second. A switch box provided with a small incandescent lamp and a switch
and connections whereby either such small lamp or a main lamp can be put into
or out of circuit substantially as set forth.
Dated this Sixth day of Octahan 1000
W. B. JOHNSON,
4, Clayton Square, Liverpool, Agent.