Improvements in Electric Lamps.
Year: 1898

page_text: Date of Application, 20th Apr., 1898-Accepted, 11th June, 1898
CUMI LEIE DI MUITIVATION.
Improvements in Electric Lamps.
We, THOMAS SIDNEY HILL, of Bellair Villa, 2, Cotham Lawn Road, Cotham,
Bristol, Electrical Engineer, and PETO AND RADFORD, LIMITED, of 57B, Hatton
Garden, in the County of Middlesex, Electrical Engineers, 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, and
accompanying drawing, that is to say:-
This invention relates to electric lamps, and more especially to portable electric
lamps to be carried upon cycles or other vehicles at night, and it has for its object
a novel method of constructing and arranging the parts of such electric lamps, so
that they are extremely effective, giving a very brilliant light in the direction
in which it is required, of little weight, not likely get out of order, and very
easily taken to pieces and put together for the purpose of replacing the incandes-
cent electric lamp, or for other purposes.
The accompanying drawing is in illustration of the invention, Figure 1 being a
transverse vertical section through the entire lamp, Figure 2 a side view of the
same, Figure 3 a front view, and Figure 4 a front view of the ring of non-conduct-
ing material, to which all the parts of the lamp are attached, and Figure 5 a back
view of the lamp.
a is a ring, rectangular in transverse section, of vulcanized fibre or other suit-
able material non-conducting electricity. To the front of this ring is fixed by
screws b, a metal ring c carrying a plain transparent glass plate d, and to the
back of the ring a is screwed by screw's e, a metal back f, domed or of other con-
venient shape, which serves as a protection to an inner parabolic reflector g having
a flange which is held against the ring a by the flange of the back f. The interior
of the parabolic reflector is silvered or polished so that it reflects as much as
possible of the light from a small incandescent electric lamp h which is carried in
such a position that the incandescent filament is situated as nearly as possible in
the focus of the parabolic reflector, close to which-but without touching it-the
glass bulb of the lamp h is situated, the rays from the incandescent lamp so
arranged being projected forward with great intensity and power, and diverging
slightly, so that when carried by a bicycle or other vehicle, they throw a bright
light ahead, and brilliantly light up both sides of the road.
The incandescent electric lamp his carried below by insulated metal conduct-
ing wires i, ¹, the lower ends of which are fixed to plates k, k¹ screwed into a recess
on the inner side of the insulating ring a. The conducting wires i, i, which are
slightly elastic, are directed somewhat back and their upper ends are turned back
horizontally and at such a distance apart that the ordinary loops at the ends of the
conducting wires of the lamp h can be sprung over them and held in position, the
extreme points of the wires i, ¹ being preferably bent somewhat outward so as to
prevent the possibility of the lamp coming off.
The upper pointed end of the glass bulb is supported freely in a ring at the lower
end of a wire of suitable shape, a plate m at the upper end of which is screwed
to the inner side of the ring a.

page_text: In order that the light may be readily switched on or off as desired, one of the
wires is electrically connected to one of the conducting wires n¹ leading to the
electric battery or accumulator, and the other wire is electrically connected to
the screw or pivot o upon which the metal switch p is pivotted, the screw o being
screwed into the ring a. The other conducting wire n from the accumulator is
electrically connected to a small contact piece also screwed to the insulating
ring a. When, therefore, the switch p is in the position shown in Figure 4 the circuit
is broken and the lamp extinguished, whilst when it is turned to the position
shown in dotted lines the circuit is completed, and the lamp is set in action. The
two insulated conducting wires n, n¹ are brought away and conducted to the poles
of the accumulator which is carried in any convenient position, as, for instance,
upon the front of the frame of a bicycle. A hook or other attachments is pro-
vided at the back of the lamp, by which it can be readily fitted in its place or
removed.
All the parts of the connections being fixed to the insulating ring a, there is no
difficulty in fitting them together and keeping them insulated, whilst when desired
a new incandescent lamp can be very quickly and easily fitted upon the conduct-
ing wires i, i¹, by taking off the reflector at the back of the lamp. By the method
of arranging and suspending the incandescent lamp, it is firmly and safely held
in the focus of the parabolic reflector y which is itself preserved from injury by
the outer cover f at the back.
We do not confine ourselves to the precise details and proportions of the several
parts of the apparatus, which may be varied more or less as may be found desirable,
to suit different circumstances, but
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is: -
-
1. The combination with the ring of non-conducting material a, of the
parabolic reflector g, back cover f, transparent front d, and electric lamp h, sub-
stantially in the manner and for the purpose described and illustrated.
2. In combination with the electric lamp h, the bent elastic conducting and
supporting wires i, 1, and the support 7, attached to the ring of non-conducting
material a, substantially as described and illustrated.
3. In combination with the electric lamp h, bent conducting wires i, ¹, and
ring of non-conducting material a, the insulated conducting wire n¹ in electric con-
nection with the wire i¹, the insulated conducting wire n, and the moveable switch 2
by which the insulated conducting wire n can be connected with or disconnected
from the wire i, substantially as described and illustrated.
СТУПА
10032cr
Low day Οι αρπ 1000.
EDWARDS & Co.,
65 and 66 Chancery Lane, London, Agents for the Applicants.