Improvements in Electric Glow Lamp Fittings.
Year: 1898

page_text: Date of Application, 8th June, 1898
Complete Specification Lett 4th Mar 1899-Accepted 8th Anr. 1899
TRUVIDIONAL DIPOLTIVATION.
Improvements in Electric Glow Lamp Fittings.
We, SIEMENS BROTHERS & CO LIMITED, of 12, Queen Anne's Gate, Westminster,
S.W, Electrical Engineers, do hereby declare the nature of this invention (as
communicated to us from abroad by Siemens & Halske Aktien Gesellschaft, of
Markgrafen Strasse 94, Berlin, S.W., Electrical Engineers), to be as follows.
This invention relates to an improved means for securing the metal contact
ring to the foot or base of an incandescent electric lamp globe
For this purpose according to one arrangement the globe base is formed with
two diametrically opposite recesses, while the metal contact ring 18 formed with
two corresponding internal projections, and slits are formed in the neighbourhood
of the said projections in such manner as to afford the parts on which they are
situated a certain amount of spring action
For securing the globe base in the contact ring, the latter 18 pushed on to the
former, the parts caying the projections being sprung outward sufficiently to
allow the projections to pass over the base, when the projections come opposite
the recesses of the base they sping into them and thus secure the ning on the
base. For greater security a sping-ng can be pushed over the contact ring
when in position, thus preventing the slit portions carrying the projections from
springing outwards until the ing has been removed again
According to another modification the globe base 18 made with projections in-
stead of recesses, and the contact ring has corresponding recesses.
Dated this 8th day of June 1898.
ABEL & IMRAY,
Agents for the Applicants.
We, SIEMENS BROTILERS & CO LIMITED, of 12, Queen Anne's Gate, Westminster,
in the County of London, Electrical Engineers, do hereby declare the nature of
this invention (as communicated to us from abroad by Siemens & Halske Aktien
Gesellschaft, of Markgiafen Strasse 94, Berlin, SW., Electrical Engineers) 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 an improved means for securing the metal contact
ring the foot or base of an incandescent electric lamp globe, as we will de-
Boribe with reference to the accompanying drawings, in which Fig. 1 shews the
017

page_text: elevation of a glow lamp constructed according to this invention, Fig. 2 shews a
section on line Fig. 1, Fig. 3 a horizontal section on line y y Fig. 1, and
Fig 4 shews a section of a modified construction
In the arrangement at Figs 1 to 3 the globe base a is formed with two diametri-
cally opposite recesses b, while the metal contact ring c is formed with two corres-
ponding internal projections & and slits are formed in the neighbourhood of the
said projections in such manner as to afford the parts on which they are situated
a certain amount of spring action, such slits may for example be formed in the
manner shewn at f Fig. I.
For securing the globe base in the contact ring, the latter is pushed on to the
former, the parts carrying the projections being sprung outward sufficiently to
allow the projections d to pass over the base, when the projections come opposite
the recesses 6 of the base they spring into them and thus secure the ring on the
base. For greater security a spring-ring & can be pushed over the contact ring
when in position, thus preventing the slit portions carrying the projections from
springing outwards until the ring has been removed again.
According to the modification shewn at Fig 4 the globe base is made with
projections instead of recesses, and the contact ring has corresponding re-
cesses d, the airangement being thus the reverse of that first described but the
action is precisely the same
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, we declare that what we claim
18:-
1 Securing a contact iing on the base of an electric glow lamp by forming the
ring with internal projections or recesses, while the globe base 18 made with
corresponding recesses or projections, with which the projections or recesses of
the ring are made to engage with spring action substantially as described.
2. In combination with the fastening device referred to in the first claim the
use of a spring ng fitted over the contact 1ing at the part which is formed with
spring action so as to hold it securely on the globe base, substantially as described
Dated this 4th day of March 1899
ABEL & IMRAY,
Agents for the Applicants.