Improvements in and relating to Electrical Incandescence Lamps.
Year: 1899

page_text: Date of Application, 20th Mar., 1899-Accepted, 22nd Apr., 1899
[Communicated from abroad by ALLGEMEINE ELEKTRICITÄTS-GESELLSCHAFT, of
Schiffbauerdamm, 22, Berlin, Germany.]
Improvements in and relating to Electrical Incandescence Lamps.
;
I, VICTOR ISIDORE FEENY, of 60, Queen Victoria Street, in the City and County
of London, Consulting Engineer and Chartered Patent Agent, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to a lamp with illuminating bodies composed of second
class conductors (electrolytes).
The object of this invention is a lamp with illuminating bodies composed of
second class conductors, in which the exciting or starting of the illuminating body
or filament is effected from the outside by means of a flame, as, for instance, that of
a lucifer match or of a spirit lamp. By dispensing with any exciting apparatus
which is automatically put in and out of circuit, the construction of the lamp
becomes so simple in form that it may be applied at once without any preliminary
action to the ordinary Edison, Swan and similar lamp holders. For this reason
and also for the purpose of making the illuminating bodies easily interchangeable,
the base is suitably separated from the protecting globe, which is furnished with
openings for the introduction of the exciting flame.
Figure 1 of the accompanying drawing illustrates a lamp of the kind with an
Edison lamp holder. Figures 2 to 4 represent details of the same. Figures 5 to 7
illustrate a lamp for a Swan lamp holder and Figure 8 an alteration of a lamp
with Edison lamp holder for obliquely placed lamp-holders.
The lamp consists of two essential parts, the base with the illuminating body or
filament, and the protecting globe and its fixing ring. The base is composed of an
insulating material a of the outer contact ring b, and of the small contact plate c.
With the two latter metal rods or tubes d d are connected, which form the support
or bearer for the interchangeable illuminating body or filament. This latter con-
sists, as shown in Fig. 3, of the incandescent filament e, the bridge piece f made
of insulating material and the contact parts gg. For preventing these inserted
contact parts or pieces from falling out of the metal tubes d d the latter are slotted
at their lower extremities, Figure 2, so that they act as spring-sockets. The pro-
tecting globe h, Figs. 1 and 4; is provided with openings i, k the lower of which i
serves to allow the exciting flame to be introduced. The fixing of the frame h is
effected by cementing it into a screwed socket or ring 1, which can be screwed on
to the outside or it may be arranged to be screwed to the inside, of the outer
contact ring of the base b.
Figures 1 to 3 shew an easily detachable connection between the interchangeable
The electrodes of the
illuminating body efg and the metal sockets dd.
illuminating body may however, be connected with the conducting wires by
soldering or similar means.
For other damp-holder systems, for example, the Swan, the fixing ring or
socket m for the globe h, Figs. 5 to 7, is formed differently so as to correspond with
the peculiarity of the holder. In this case, the ring is furnished with holes nn or

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bayonet slots pp for receiving the pins oo of the base. If holes nn be furnished
the pins must be detachably arranged in the base. A form of carrying out this
arrangement is shown in Fig. 5. The pin o enters or rests in the interior of the
case and is retained tightly against the same by means of a nut s. It may be
further mentioned that the fixing ring for the globe may be made of glass with the
latter, and likewise that the globe may be fixed to the base in any other manner,
as preferred.
In order that it may be possible for the lamp to be excited and to burn in
obliquely placed holders, the openings ik for effecting excitation by means of a
flame or the like and for ventilation must be arranged vertically below and above
the illuminating body ef g.
As in screwing in the lamp, care, must be taken that the openings ik stand
approximately perpendicular above and below the illuminating body or filament ef,
it may easily occur, especially with Edison holders that the contact plate c, is not
in contact with the middle contact of the holder. Accordingly, for the purpose of
ensuring a current conducting connection the contact plate c should in such case
be furnished with a spring u.
Having now particularly described and ascertained the nature of my said
invention. and in what manner the same is to be performed, I declare that what
I claim is:-
-
1. Lamp with illuminating bodies composed of second class conductors for non-
automatic excitation, characterised by a base, inserted in the usual holders for
electric incandescence lamps and carrying the illuminating body, in combination
with a globe (ball, pear or other shape), h fixed directly or by means of a special
holding ring to the base and furnished with openings ik of which the one i is
placed vertically below the illuminating pin e in the case of obliquely placed
holders, for the purpose of effecting the exciting of the heating body in the frame,
lifting off the globe for interchanging the illuminating body and enabling the
lamp to be used with the ordinary holders without any trouble, substantially as
described.
2. In the lamp indicated under Claim 1, the arrangement of special electrode
supports dd on the base for the purpose of allowing easy interchanging of the
illuminating body ef g, substantially as described.
3. In the lamp indicated under Claim 1, in the case of a holder with a contact
plate on the base being employed, the arrangement of a spring u on the contact
piece for ensuring a current conducting connection with the middle contact of
the holder, when the latter is placed obliquely, substantially as described.
Dated this Twentieth day
DI A
For the Applicant,
GEDGE & FEENY,
60, Queen Victoria Street, London, E.C.,
Chartered Patent Agents.