Improvements in Electric Incandescent Lamps.
Year: 1899

page_text: Date of Application, 21st Dec., 1899
Complete Specification Left, 17th Sept., 1900-Accepted, 27th Oct., 1900
Improvements in Electric Incandescent Lamps.
I. VICTOR SCHOLZ, of 20, Victoria Strasse, Fürstenwalde on the Spree, in the
Empire of Germany, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in incandescent lamps of the kind
in which the socket or mounting of the lamp which is provided with a screw
thread, bayonet-lock or the like, is secured to the metallic ring or neck of the
lamp.
Heretofore the connection between these parts was effected by soldering
them together. This method however is cumbersome, and requires time, while
it is rarely safe owing to the difficulty of introducing the solder between the
outer and inner part, so that there was practically no guarantee of the joint
being sound. Moreover many lamps are lost through the soldering.
According to the present improvement the connection between the said parts
is effected by means of tongues, provided on one of such parts, which fit into
holes or openings provided in the other part. The tongues are made to pass
through the holes and are then bent over.
In carrying the invention into practice the metal-ring, cemented to the neck
of the bulb, is provided with tongue-pieces stamped from the solid piece and
having slightly outwardly curved points. The socket or mounting of the bulb
is formed with openings corresponding to the said tongues. If now the socket
is placed upon the ring the pointed ends of the tongues engage in the openings
and are then forced outwards. After the socket has been placed in its proper
position the outer ends of the tongues are bent upwards; but they may if desired
be bent downward. Thus the socket or mounting is secured to the lamp in a
very expeditious and simple manner.
Instead of arranging the tongue-pieces in the longitudinal direction of the
lamp they may be arranged laterally or sideways. The tongues are formed by
stamping from the solid of the ring as in the first instance but in the present
case two tongues are arranged opposite each other with their points or free ends
so disposed as to allow them to pass through a single opening in the socket.
Similar pairs of tongue-pieces may be provided at several parts of the peripheral
surface of the ring, particularly at diametrically opposite points. The socket is
placed upon the ring in such a manner that the openings are adjacent to the
tongues which latter are then bent over. In lieu of arranging the pair of
tongues opposite each other, single tongue-pieces may be provided. The socket
is then placed upon the ring and slightly rotated so as to allow the end of these
tongues to pass through the openings and to be bent over.
The tongues may also be arranged to point at an angle in the one or other
direction. In such case the socket whilst being placed upon the ring is slightly
twisted round so as to enable the tongues to engage in the openings and appear
on the outer side.
This manner of connecting the parts has the advantage of being expeditious
and most simple without requiring soldering, and can therefore be easily undone

page_text: when required for renewing one of the parts. As the ring and its socket fit
ach other accurately it will be easy to secure one of the pole wires in the
implest manner by clamping it between the ring and socket so that the latter
s electrically connected without the necessity of soldering.
Dated this 21st day of December 1899.
Improvements in Electric Incandescent Lamps.
I, VICTOR SCHOLZ, of 20, Victoria Strasse, Fürstenwalde on Spree, in the
Empire of Germany, Engineer, 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:-
This invention relates to improvements in incandescent lamps of the kind
in which the socket or mounting of the lamp which is provided with a screw-
thread, bayonet-lock or the like, is secured to the metallic ring or neck of the
lamp.
Heretofore the connection between these parts was effected by soldering
them together. This method however is cumbersome and requires time, while
it is rarely safe owing to the difficulty of introducing the solder between the
outer and inner part, so that practically no guarantee exists of the joint being
sound. Moreover many lamps are lost through the soldering.
According to my invention the connection between the said parts is effected
by means of tongues, provided on one of such parts, which fit into holes or
openings provided in the other part. The tongues are adapted to pass through
the holes and are then bent over.
In order that my invention may be readily understood and carried into effect
I will described the same fully with reference to the accompanying drawings in
which..
Figure 1 is a vertical section of an electric incandescent lamp embodying my
invention.
Figure 2 is a horizontal section of the same line A, B, of Figure 1.
Figures 3 and 4 represent in elevation the bulb and socket respectively of an
electric incandescent lamp according to my invention.
Figure 5 is a central vertical section of the lower part of a modified form of
lamp.
Figures 6 and 7 are an elevation and horizontal section of a modified form
of lamp.
Figures 8 and 9 shew the same with the bulb and socket portions detached
one from the other.
Figure 10 is a further modification and
Figure 11 a horizontal section thereof.
In the form of lamp shown in Figures 1 to 4, the metal-ring a cemented to
the neck of the bulb, is provided with tongue-pieces 6 stamped from the solid
piece and having slightly outwardly curved points. The socket or mounting c
of the bulb is formed with openings d corresponding to the said tongues. If
now the socket is placed upon the ring a the pointed ends of the tongues b
engage in the openings d and are then forced outwards.
been placed in its proper position the outer ends of the tongues bare bent
upwards as shown in Figure 1; but they may if desired be bent downwards as
After the socket c has

page_text: shown in Figure 5. Thus the socket or mounting is secured to the lamp in a
very expeditious and simple manner.
Instead of arranging the tongue-pieces in the longitudinal direction of the
lamp they may be arranged laterally or sideways as shown in Figures 6 and 7.
The tongues 6 are formed by stamping from the solid part of the ring a as in
the first instance but in the present case two tongues are arranged opposite
each other with their points or free ends so disposed as to allow them to pass
through a single opening d in the socket or part c. Similar pairs of tongue-
pieces may be provided at several parts of the peripheral surface of the ring a,
particularly at diametrically opposite points, as is shown in Figure 7. The
socket or part c is placed upon the ring a in such a manner that the openings d
lie over the tongues b which latter are then bent over. In lieu of arranging
the pair of tongues opposite each other, single tongue-pieces b may be provided
as indicated in Figures 10 and 11. The socket is then placed upon the ring a
and slightly rotated so as to allow the end of these tongues to pass through
the openings and to be bent over.
The tongues may also be arranged to point at an angle in the one or other
direction. In such case the socket e whilst being placed upon the ring a is
slightly rotated so as to enable the tongues to engage in the openings d and
appear on the outer side.
This manner of connecting the parts has the advantage of being expeditious
and most simple without requiring soldering, and can therefore be easily undone
when required for renewing one of the parts. As the ring and its socket fit
each other accurately it will be easy to secure one of the pole wires in the simplest
manner by clamping it between the ring and socket so that the latter is electric-
ally connected without the necessity of soldering.
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:-
b
Electric incandescent lamp in which the socket is placed upon a ring connected
with the neck of the glass-bulb and characterized by the fact that the ring a
is provided with tongue-shaped metal strips adapted to engage in openings d
of the socket e said tongues being then bent over in such a manner as to secure
the socket in position upon the said ring substantially as herein before described
and illustrated by the accompanying drawings.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.