Improvements in Contact Rings for Electric Glow Lamps.
Year: 1898

page_text: Improvements in Contact Rings for Electric Glow Lamps.
We, SIEMENS BROTHERS & CO LIMITED, of 12, Queen Anne's Gate. Westminster,
S W., 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 Markgrafen Strasse, 94, Berlin, SW, Electrical
Engineers) to be as follows.
-
This invention relates to electric glow lamps having contacts of the kind used
for example by Edison, Bernstein Thomson-Houston, and others, wherein the
contact ring has such a diameter as to be larger than the globe foot or base
of most glow lamps now in use
When such contact rings are fixed to the base of the globe by means of
gypsum or cement as 18 now usual, this cement material allows of the existence
of greater or less differences between the size of the globe bases and the sizes
of the contact ings which latter vary considerably according to the kind of
fisting employed
The present invention has for its object to enable the advantage to be obtained
of fixing the contact rings directly on the globe base so as to dispense with
the use of cementing material, without necessitating the manufacture of globes
with bases of varying sizes to suit the varying sizes of the different contact
ring, and it consists in making the contact rings in such manner that while
the part that makes contact with the lamp fittings may be of a varying size,
according to the kind of fitting employed, the part that is secured to the globe
base, is always made of one and the same size smaller than the other part so
as to fit one and the same uniform size of base of the globes
The smaller part of the contact ring fitting the globe base may be provided
with internal projections having spring action, adapted to engage with core-
sponding recesses in the globe base or it may be fitted to the globe base by
any suitable known means.
The larger part making contact with the fittings may be of any known
arrangement, such as with screw attachment, bayonet joint or the like
Duted thie Sth dow of June 1808
-Improvements in Contact Rings for Electrio Glow Lamps.
We, SIEMENS BROTHERS & CO LIMITED, of 12, Queen Anne's Gate, Westminster,
n the County of London, Electrical Engineers, do hereby declare the nature of
[Prace 8d.]

page_text: this invention (as communicated to us from abroad by Siemens & Halske Aktien
Gesellschaft, of Markgrafenstrasse 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 electric glow lamps having contacts of the kind used
for example by Edison, Bernstein, Thomson-Houston, and others, wherein the
contact ring has such a diameter as to be larger than the globe foot or base
of most glow lamps now in use.
When such contact rings are fixed to the base of the globe by means of
gypsum or ceinent as is now usual, this cement material allows of the existence
of greater or less differences between the size of the globe bases and the sizes
of the contact rings which latter vary considerably according to the kind of
fitting employı d
The present invention has for its object to enable the advantage to be obtained
of fixing the contact rings directly on the globe base so as to dispense with
the use of cementing material without necessitating the manufacture of globes
with bases of varying sizes to suit the varying sizes of the different contact
rings, and it consists in making the contact ings in such manner that while
the part that makes contact with the lamp fittings may be of varying size,
according to the kind of fitting employed, the part that is secured to the globe
base is always made of one and the same size smaller than the other part so
as to fit one and the same uniform size of base of the globes.
The smaller part of the contact ring fitting the globe base may be provided
with internal projections having sping action, adapted to engage with corre-
sponding recesses in the globe base or it may be fitted to the globe base by
any suitable known means
The larger part making contact with the fittings may be of any known
arrangement, such as with sciew attachment, bayonet joint or the like
On the accompanying drawing Fig 1 shews a section of a contact ring formed
with a screw thread on the past a which is made of a size to fit any particularly
form of lamp fittings, while the part 6 18 made of a smaller and unvarying size
to fit duectly on to the bases of unvarying size of lamp globes. This part is
shewn provided with internal projections for fitting with spring action into
corresponding recesses in the globe base, as described in the specification to our
application for Letters Patent No 12,839 of 1898
Fig 2 shews a section of a contact ring the part a of which 18 adapted to fit
any kind of lamp fittings not provided with a sciew thread, while the part 6 18
again made of a smaller and unvarying size
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
Constructing contact rings for glow lamps with the part that engages with
the lamp fittings made of any form or size adapted for such fittings while the
other part is made of an unvarying smaller size to fit directly on to globe
bases of corresponding unvarying size, substantially as described
Dated thin 4th day of March 1900