Title of Invention	ELECTRIC LAMP
Abstract	The invention relates to an electric lamp (1) with a base (2). Said base (2) has a base bottom (8), on the outside of which at least one base bottom contact plate is located. Each base bottom contact plate has at least one opening. The material of each opening is bent round into a tongue in such a way that this tongue engages in the base bottom. This ensures that contact plate is better anchored in the base bottom.

Title of Invention

ELECTRIC LAMP

Abstract

The invention relates to an electric lamp (1) with a base (2). Said base (2) has a base bottom (8), on the outside of which at least one base bottom contact plate is located. Each base bottom contact plate has at least one opening. The material of each opening is bent round into a tongue in such a way that this tongue engages in the base bottom. This ensures that contact plate is better anchored in the base bottom.

Full Text	1A. The invention relates to an electric lamp. Moreover, the invention relates to lamps both with a screw base and with a bayonet base. In the first case, a normally round base bottom contact platelet is arranged centrally on the outer surface of the base bottom and serves there as an outer contact for connecing to an electric supply source. In the second case, two elongated, normally oval or elliptical base bottom contact platelets are arranged as electric outer contacts on the outer surface of the base bottom. The type of light source as such, that is to say incandescent filament or gas discharge, for example, plays no role here. The invention therefore comprises both incandescent lamps and discharge lamps which have bases with at least one base bottom contact platelet. PRIOR ART In this context, economic, that is to say automated lamp production entails the task of producing reliable soldered connections with a minimized consumption of solder in the shortest possible time, that is to say in conjunction with quickly moving lamp production lines. The soldered connections are usually implemented by dotting flux onto the base bottom contact platelets, fallowing by soldering, 2. for example flame solderiing. In the case of the targeted high performances of lamp production lines, that is to say in accordance with short machine clock cycles of the lamp production lines, a soldering time of typically f a few tenths of a second, for example 500 ms, is available. In this short time, it is difficult for the previously required amount of solder to be fused and suitably distributed over the entire surface of the contact platelet. A complicating factor is that because of the short machine clock cycles of the lamp production line, relatively high accelerating forces militate against the liquid solder remaining on the contact platelet. Document EP-A 0 488 462 discloses a lamp having a base bottom contact platelet. The base bottom contact platelet has a plurality of holes around & central opening - for guiding through and soldering a supply lead! to the contact platelet. In order to save material, these holes are intended to reduce the extent to which flux and solder flow off. A further problem results from the attempt to reduce the consumption of material for the base bottom contact platelet as far as possible, for example for reducing the thickness of the contact platelet. This, however, further results increasingly in the need to connect the contact platelet reliably to the base bottom. 3. SUMMARY OF THE INVENTION It is the object of the present invention to provide an electric lamp having a base bottom contact platelet in accordance with the preamble of claim 1, which ensures a permanent connection between the base bottom and contact platelet in conjunction with a reduced requirement of material for the contact platelet and solder. According to the invention, at least one base bottom contact platelet of the lamp has at least one cutout. Moreover, the material of the cutout is bent over to form a lug in such a way that the lug engages in the base bottom. As a result of these two measures, it is achieved, on the one hand, that the area to be covered by the flux and the solder is restricted, specifically with the aid of the cutouts. On the other hand, an improved anchoring of the contact platelet in the base bottom is achieved, specifically by means of the lugs created with the aid of the cutouts. Said lugs also have the advantage that they are fabricated from the material which is required in any case for a contact platelet, that is to say without increased consumption of material. The at least one cutout, and consequently also that at least one lug, preferably has an elongated shape. 3A. Moreover, two or more cutouts are preferably arranged around the central opening for the supply lead. In a development for a bayonet base, the at least base bottom contact platelet has an elongated shape defining a longitudinal axis. Typical shapes are, for example, oval, elliptical or at least ellipse-like ones. Seen in the direction of the longitudinal axis, one cutout is arranged on the left of the central opening for the supply lead and one cutout is arranged on the right. Moreover, the two elongated cutouts are oriented essentially transverse to the longitudinal axis of the base bottom contact platelet. In addition, the lugs of the two elongated cutouts are bent essemtially transverse to the longitudinal axis of the base bottom - 4 - contact platelet. This has the advantage that the elongated lugs project with their entire length into the base bottom and consequently anchor the base bottom contact platelet therein particularly effectively. The two lugs are preferably bent in such a way that, with reference to the longitudinal axis of the base bottom contact platelet, they engage in the base bottom at opposite narrow sides of the elongated cutouts, in other words are arranged diagonally with reference to the contact platelet. This reduces rotation or twisting of the contact platelet, which is particularly important in the case of relatively thin base bottom contact platelets. In a development for a lamp with a screw base, an essentially circular base bottom contact platelet is arranged in the center of the base bottom. At least two, preferably three, particularly preferably four elongated cutouts are arranged distributed symmetrically around the opening arranged in the center of the base bottom contact platelet. Relatively thin contact platelets can be used owing to the configuration according to the invention of the or each base bottom contact platelet, in particular on the basis of anchoring by means of lugs. The thickness of a base bottom contact platelet is typically less than 0.5 mm, in particular less than 0.3 mm. Description of the accompanying drawings The invention is to be explained in more detail below with the aid of an exemplary embodiment. In the drawing: Figure 1 shows a side view of an incandescent lamp according to the invention, with a bayonet base, - 5 - Figure 2 shows the plan view of the base in the direction toward the base bottom, Figure 3a shows a plan view of an elliptical base bottom contact platelet of the lamp from Figure 1, Figure 3b shows a sectional illustration along the longitudinal axis of the contact platelet from Figure 3a, Figure 3c shows a sectional illustration of the contact platelet from Figure 3a, along the line AA, Figure 4a shows a plan view of an alternative base bottom contact platelet of the lamp from Figure 1, and Figure 4b shows a sectional illustration along the longitudinal axis L of the contact platelet from Figure 4a. Figure 1 shows the side view of an incandescent lamp 1 according to the invention, with a bayonet base 2, in a schematic illustration. The incandescent lamp 1 has a transparent, pear-shaped lamp bulb 3 made from glass, which is sealed in a gastight fashion by means of a flare mount (not illustrated). An incandescent filament 4 is arranged in the interior of the lamp bulb 3. The incandescent filament 4 is connected to two supply leads 5, 6 which are led (not illustrated) to the outside in a gastight fashion through the flare mount. The flare mount of the lamp bulb 3 is arranged in the bayonet base 2. The bayonet base 2 has a base shell 7 made from aluminum and a base bottom 8 made from glass. Reference is also made below to Figure 2, which shows a schematic plan view of the base 2 of the lamp 1 from - 6 - Figure 1, in the direction of the base bottom 8. Two elliptical base bottom contact platelets 9, 10 of thickness 0.2 mm and made from copper-zinc (CuZn) alloy are arranged on the outer surface of the base bottom 8. The semiminor and semimajor axes are respectively approximately 2.7 cm and 5 cm. Each base bottom contact platelet 9, 10 respectively has a central opening 11, 12. Through each opening 11, 12, one of the two supply leads 5, 6 is respectively led outward, where it is connected to the associated base bottom contact platelet 9, 10 by means of solder 13 (not illustrated in Figure 2, for the sake of clarity). Reference is additionally made below to Figures 3a-3c, which show a plan view, a longitudinal section and a section along the line AA of one 9 of the two base bottom contact platelets 9, 10 of the lamp from Figure 1. Each base bottom contact platelet 9, 10 has two rectangular cutouts 14, 15 with dimensions 0.5 mm times 28 mm. Seen in the direction of the semimajor axis, one cutout 14, 15 or 16, 17 each is arranged on the left and right of the central opening 11, 12, and transverse to the semimajor axis in each case. The material of each cutout 14, 15 (Figures 3a-3c) is bent over to form a lug 18, 19. Each lug 18, 19 is orientated essentially perpendicular to the base bottom contact platelet 9. Only the free ends 20, 21 of the two -lugs 18, 19 are respectively bent, for reasons of stability, in the direction of the underside of the contact platelet 9. Both the entire lug and the end of the lug itself are more stable thereby in each case. Each lug 18, 19 projects into the base bottom 8 of the lamp 1 (not illustrated) , and anchors the base bottom contact platelet in this way in the base bottom 8. A plan view and a longitudinal section of an alternative embodiment of an eye-shaped base bottom contact platelet 22 are illustrated schematically in - 7 - Figures 4a and 4b for the lamp 1 shown in Figure 1. By contrast with the variant shown in Figures 3a-3c, here the two narrow sides 23a, 23b of each elongated cutout 24 are not cut at right angles to the associated long sides 25, 26. However, the narrow sides 23a, 23b are cut essentially parallel to the respectively closest outer edges 27a and 27b of the contact platelet 2 2. This renders the two cutouts 24 no longer rectangular, but approximately trapezoidal. Moreover, the material of each cutout 24 is bent along the shorter long side 25 thereof to form a lug 28 in each case, which is orientated perpendicular to the plane of the contact platelet 22 and to the longitudinal axis L thereof. Because of their trapezoidal shape, the two lugs 28 thus formed have the advantage that they are more effectively anchored in the base bottom 8 of the lamp 1, since they are pressed from behind (not illustrated) by the material of the base bottom 8 in the finished lamp. The cuts, executed in each case parallel to the closest outer edge 27a, 27b of the contact platelet 22, of the narrow sides 23a, 23b of the two cutouts 24 result in a higher flexural strength by comparison with a corresponding right-angled cut. Finally, the manipulability of this base bottom contact platelet 22 is also more favorable than in the exemplary embodiment illustrated in Figures 3a-3c. Since the two lugs 28 are bent along the long side 25 instead of along the narrow side, the lugs 28 are conspicuously shorter, but also conspicuously wider, in turn. In any event, by contrast with the first named exemplary embodiment, when these base bottom contact platelets 22 are manipulated there is no longer any mutual mechanical sticking during separation in a vibrating conveyor. We Claim: 1. An electric lamp (1) comprising: o a lamp vessel (3) internally accommodating a luminous means (4), o a base (2) connected to the lamp vessel (3), the base (2) comprising: o a base shell (7) and a base bottom (8) made from insulating material, and atleast one base bottom contact platelets (9; 10; 22) being disposed on the outer surface of the base bottom (8), and o supply leads (5; 6) connected to the luminous means (4) at one end and to atleast one base bottom contact platelet (9; 10; 22) at the other end, atieast one of the supply leads being led through an opening (11; 12) of the associated base bottom contact platelet (9; 10)to the outside of the lamp vessel (3), where it is connected by means of a solder (13) to the base bottom contact platelet (9; 10), characterized in that o the atleast one base bottom contact platelet (9; 10; 22) has atleast one cutout (14-17; 24), material of the atleast one cutout (14-17; 24) being bent around to form atleast one lug (13; 19; 28), the configuration of the atleast one fug (18; 19; 28) is such that it engages in the base bottom (8). 2. The lamp as claimed in claim 1, wherein the atleast one cutout (14-17; 24). and the atleast one lug (18; 19; 28), has an elongated shape. 3. The lamp as claimed in one of claims 1 or 2, wherein the atieast one base bottom contact platelet (9; 10; 22) has an elongated shape defining a longitudinal axis and wherein seen in the direction of the longitudinal axis, one cutout is configured on the left (15; 17) of the opening (11; 12)for the supply lead, and one cutout on the right (14; 16) of the opening. 4. The lamp as claimed in claim 3, wherein when dependent on claim 2, the two elongated cutouts (14; 15; 16; 17; 24) are oriented essentially transverse to the longitudinal axis of the base bottom contact platelets (9; 10; 22) 5. The lamp as claimed in claim 4, wherein, the lugs (18; 19)of the two elongated cutouts (14; 15) are bent around essentially transverse to the longitudinal axis of the base bottom contact platelet (9). 6. The lamp as claimed in claim 5, wherein, with reference to the longitudinal axis of the base bottom contact platelet, the two lugs engage in the base bottom at opposite narrow sides of the elongated cutouts. 7. The lamp as claimed in one of claims 2, 3 or 4, wherein the narrow sides (23a; 23b) of the atleast one cutout (24) orientated essentially parallel to an immediately adjacent outer edge (27a; 27b) of an associated base bottom contact platelet (22). 8. The lamp as claimed in one of claims 1 to 7, wherein the atleast one cutout (24) is trapezoidal, and wherein the associated lug (28) is bent along a respective shorter long side (25) of two parallel long sides (25, 26) of the associated cutout (24). 9. The lamp as claimed in one of claims 1 to 8, wherein the base is a bayonet base. 10. The lamp as claimed in one of claims 1 or 2 , wherein an essentially circular base bottom contact platelet is provided in the center of the base bottom, and atleast two elongated cutouts are configured symmetrically distributed around the opening arranged in the center of the base bottom contact platelet. 11. The tamp as claimed in claim 10, wherein the base is a screw base. 12. The lamp as claimed in one of the preceding claims, wherein the thickness of the base bottom contact platelet is less than 0.5 mm, in particular less than 0.3 mm. The invention relates to an electric lamp (1) with a base (2). Said base (2) has a base bottom (8), on the outside of which at least one base bottom contact plate is located. Each base bottom contact plate has at least one opening. The material of each opening is bent round into a tongue in such a way that this tongue engages in the base bottom. This ensures that contact plate is better anchored in the base bottom.

Full Text

1A.
The invention relates to an electric lamp.
Moreover, the invention relates to lamps both with a screw base and with a bayonet base. In the first case, a normally round base bottom contact platelet is arranged centrally on the outer surface of the base bottom and serves there as an outer contact for connecing to an electric supply source. In the second case, two elongated, normally oval or elliptical base bottom contact platelets are arranged as electric outer contacts on the outer surface of the base bottom.
The type of light source as such, that is to say incandescent filament or gas discharge, for example, plays no role here. The invention therefore comprises both incandescent lamps and discharge lamps which have bases with at least one base bottom contact platelet.
PRIOR ART
In this context, economic, that is to say automated lamp production entails the task of producing reliable soldered connections with a minimized consumption of solder in the shortest possible time, that is to say in conjunction with quickly moving lamp production lines.
The soldered connections are usually implemented by dotting flux onto the base bottom contact platelets, fallowing by soldering,

2.
for example flame solderiing. In the case of the targeted high performances of lamp production lines, that is to say in accordance with short machine clock cycles of the lamp production lines, a soldering time of typically f a few tenths of a second, for example 500 ms, is available. In this short time, it is difficult for the previously required amount of solder to be fused and suitably distributed over the entire surface of the contact platelet. A complicating factor is that because of the short machine clock cycles of the lamp production line, relatively high accelerating forces militate against the liquid solder remaining on the contact platelet.
Document EP-A 0 488 462 discloses a lamp having a base bottom contact platelet. The base bottom contact platelet has a plurality of holes around & central opening - for guiding through and soldering a supply lead! to the contact platelet. In order to save material, these holes are intended to reduce the extent to which flux and solder flow off.
A further problem results from the attempt to reduce the consumption of material for the base bottom contact platelet as far as possible, for example for reducing the thickness of the contact platelet. This, however, further results increasingly in the need to connect the contact platelet reliably to the base bottom.

3.
SUMMARY OF THE INVENTION
It is the object of the present invention to provide an electric lamp having a base bottom contact platelet in accordance with the preamble of claim 1, which ensures a permanent connection between the base bottom and contact platelet in conjunction with a reduced requirement of material for the contact platelet and solder.
According to the invention, at least one base bottom contact platelet of the lamp has at least one cutout. Moreover, the material of the cutout is bent over to form a lug in such a way that the lug engages in the base bottom.
As a result of these two measures, it is achieved, on the one hand, that the area to be covered by the flux and the solder is restricted, specifically with the aid of the cutouts. On the other hand, an improved anchoring of the contact platelet in the base bottom is achieved, specifically by means of the lugs created with the aid of the cutouts. Said lugs also have the advantage that they are fabricated from the material which is required in any case for a contact platelet, that is to say without increased consumption of material.
The at least one cutout, and consequently also that at least one lug, preferably has an elongated shape.

3A.
Moreover, two or more cutouts are preferably arranged around the central opening for the supply lead.
In a development for a bayonet base, the at least base bottom
contact platelet has an elongated shape defining a longitudinal
axis. Typical shapes are, for example, oval, elliptical or at
least ellipse-like ones. Seen in the direction of the
longitudinal axis, one cutout is arranged on the left of the
central opening for the supply lead and one cutout is arranged on
the right. Moreover, the two elongated cutouts are oriented
essentially transverse to the longitudinal axis of the base
bottom contact platelet. In addition, the lugs of the two
elongated cutouts are bent essemtially transverse to the
longitudinal axis of the base bottom

- 4 -
contact platelet. This has the advantage that the elongated lugs project with their entire length into the base bottom and consequently anchor the base bottom contact platelet therein particularly effectively.
The two lugs are preferably bent in such a way that, with reference to the longitudinal axis of the base bottom contact platelet, they engage in the base bottom at opposite narrow sides of the elongated cutouts, in other words are arranged diagonally with reference to the contact platelet. This reduces rotation or twisting of the contact platelet, which is particularly important in the case of relatively thin base bottom contact platelets.
In a development for a lamp with a screw base, an essentially circular base bottom contact platelet is arranged in the center of the base bottom. At least two, preferably three, particularly preferably four elongated cutouts are arranged distributed symmetrically around the opening arranged in the center of the base bottom contact platelet.
Relatively thin contact platelets can be used owing to the configuration according to the invention of the or each base bottom contact platelet, in particular on the basis of anchoring by means of lugs. The thickness of a base bottom contact platelet is typically less than 0.5 mm, in particular less than 0.3 mm.
Description of the accompanying drawings
The invention is to be explained in more detail below with the aid of an exemplary embodiment. In the drawing:
Figure 1 shows a side view of an incandescent lamp according to the invention, with a bayonet base,

- 5 -
Figure 2 shows the plan view of the base in the direction toward the base bottom,
Figure 3a shows a plan view of an elliptical base bottom contact platelet of the lamp from Figure 1,
Figure 3b shows a sectional illustration along the longitudinal axis of the contact platelet from Figure 3a,
Figure 3c shows a sectional illustration of the contact platelet from Figure 3a, along the line AA,
Figure 4a shows a plan view of an alternative base bottom contact platelet of the lamp from Figure 1, and
Figure 4b shows a sectional illustration along the longitudinal axis L of the contact platelet from Figure 4a.
Figure 1 shows the side view of an incandescent lamp 1 according to the invention, with a bayonet base 2, in a schematic illustration. The incandescent lamp 1 has a transparent, pear-shaped lamp bulb 3 made from glass, which is sealed in a gastight fashion by means of a flare mount (not illustrated). An incandescent filament 4 is arranged in the interior of the lamp bulb 3. The incandescent filament 4 is connected to two supply leads 5, 6 which are led (not illustrated) to the outside in a gastight fashion through the flare mount. The flare mount of the lamp bulb 3 is arranged in the bayonet base 2. The bayonet base 2 has a base shell 7 made from aluminum and a base bottom 8 made from glass.
Reference is also made below to Figure 2, which shows a schematic plan view of the base 2 of the lamp 1 from

- 6 -
Figure 1, in the direction of the base bottom 8. Two elliptical base bottom contact platelets 9, 10 of thickness 0.2 mm and made from copper-zinc (CuZn) alloy are arranged on the outer surface of the base bottom 8. The semiminor and semimajor axes are respectively approximately 2.7 cm and 5 cm. Each base bottom contact platelet 9, 10 respectively has a central opening 11, 12. Through each opening 11, 12, one of the two supply leads 5, 6 is respectively led outward, where it is connected to the associated base bottom contact platelet 9, 10 by means of solder 13 (not illustrated in Figure 2, for the sake of clarity).
Reference is additionally made below to Figures 3a-3c, which show a plan view, a longitudinal section and a section along the line AA of one 9 of the two base bottom contact platelets 9, 10 of the lamp from Figure 1. Each base bottom contact platelet 9, 10 has two rectangular cutouts 14, 15 with dimensions 0.5 mm times 28 mm. Seen in the direction of the semimajor axis, one cutout 14, 15 or 16, 17 each is arranged on the left and right of the central opening 11, 12, and transverse to the semimajor axis in each case.
The material of each cutout 14, 15 (Figures 3a-3c) is bent over to form a lug 18, 19. Each lug 18, 19 is orientated essentially perpendicular to the base bottom contact platelet 9. Only the free ends 20, 21 of the two -lugs 18, 19 are respectively bent, for reasons of stability, in the direction of the underside of the contact platelet 9. Both the entire lug and the end of the lug itself are more stable thereby in each case. Each lug 18, 19 projects into the base bottom 8 of the lamp 1 (not illustrated) , and anchors the base bottom contact platelet in this way in the base bottom 8.
A plan view and a longitudinal section of an alternative embodiment of an eye-shaped base bottom contact platelet 22 are illustrated schematically in

- 7 -
Figures 4a and 4b for the lamp 1 shown in Figure 1. By contrast with the variant shown in Figures 3a-3c, here the two narrow sides 23a, 23b of each elongated cutout
24 are not cut at right angles to the associated long
sides 25, 26. However, the narrow sides 23a, 23b are
cut essentially parallel to the respectively closest
outer edges 27a and 27b of the contact platelet 2 2.
This renders the two cutouts 24 no longer rectangular,
but approximately trapezoidal. Moreover, the material
of each cutout 24 is bent along the shorter long side
25 thereof to form a lug 28 in each case, which is
orientated perpendicular to the plane of the contact
platelet 22 and to the longitudinal axis L thereof.
Because of their trapezoidal shape, the two lugs 28
thus formed have the advantage that they are more
effectively anchored in the base bottom 8 of the lamp
1, since they are pressed from behind (not illustrated)
by the material of the base bottom 8 in the finished
lamp. The cuts, executed in each case parallel to the
closest outer edge 27a, 27b of the contact platelet 22,
of the narrow sides 23a, 23b of the two cutouts 24
result in a higher flexural strength by comparison with
a corresponding right-angled cut. Finally, the
manipulability of this base bottom contact platelet 22
is also more favorable than in the exemplary embodiment
illustrated in Figures 3a-3c. Since the two lugs 28 are
bent along the long side 25 instead of along the narrow
side, the lugs 28 are conspicuously shorter, but also
conspicuously wider, in turn. In any event, by contrast
with the first named exemplary embodiment, when these
base bottom contact platelets 22 are manipulated there
is no longer any mutual mechanical sticking during
separation in a vibrating conveyor.

We Claim:
1. An electric lamp (1) comprising:
o a lamp vessel (3) internally accommodating a luminous means (4),
o a base (2) connected to the lamp vessel (3), the base (2)
comprising:
o a base shell (7) and a base bottom (8) made from insulating
material, and atleast one base bottom contact platelets (9; 10; 22)
being disposed on the outer surface of the base bottom (8), and
o supply leads (5; 6) connected to the luminous means (4) at one
end and to atleast one base bottom contact platelet (9; 10; 22) at
the other end, atieast one of the supply leads being led through an
opening (11; 12) of the associated base bottom contact platelet (9;
10)to the outside of the lamp vessel (3), where it is connected by
means of a solder (13) to the base bottom contact platelet (9; 10),
characterized in that
o the atleast one base bottom contact platelet (9; 10; 22) has atleast
one cutout (14-17; 24), material of the atleast one cutout (14-17;
24) being bent around to form atleast one lug (13; 19; 28), the
configuration of the atleast one fug (18; 19; 28) is such that it
engages in the base bottom (8).

2. The lamp as claimed in claim 1, wherein the atleast one cutout (14-17;
24). and the atleast one lug (18; 19; 28), has an elongated shape.
3. The lamp as claimed in one of claims 1 or 2, wherein the atieast one base
bottom contact platelet (9; 10; 22) has an elongated shape defining a
longitudinal axis and wherein seen in the direction of the longitudinal
axis, one cutout is configured on the left (15; 17) of the opening (11;
12)for the supply lead, and one cutout on the right (14; 16) of the
opening.

4. The lamp as claimed in claim 3, wherein when dependent on claim 2, the
two elongated cutouts (14; 15; 16; 17; 24) are oriented essentially
transverse to the longitudinal axis of the base bottom contact platelets (9;
10; 22)
5. The lamp as claimed in claim 4, wherein, the lugs (18; 19)of the two
elongated cutouts (14; 15) are bent around essentially transverse to the
longitudinal axis of the base bottom contact platelet (9).
6. The lamp as claimed in claim 5, wherein, with reference to the
longitudinal axis of the base bottom contact platelet, the two lugs engage
in the base bottom at opposite narrow sides of the elongated cutouts.
7. The lamp as claimed in one of claims 2, 3 or 4, wherein the narrow sides
(23a; 23b) of the atleast one cutout (24) orientated essentially parallel to
an immediately adjacent outer edge (27a; 27b) of an associated base
bottom contact platelet (22).
8. The lamp as claimed in one of claims 1 to 7, wherein the atleast one
cutout (24) is trapezoidal, and wherein the associated lug (28) is bent
along a respective shorter long side (25) of two parallel long sides (25,
26) of the associated cutout (24).
9. The lamp as claimed in one of claims 1 to 8, wherein the base is a
bayonet base.
10. The lamp as claimed in one of claims 1 or 2 , wherein an essentially
circular base bottom contact platelet is provided in the center of the base
bottom, and atleast two elongated cutouts are configured symmetrically
distributed around the opening arranged in the center of the base bottom
contact platelet.

11. The tamp as claimed in claim 10, wherein the base is a screw base.
12. The lamp as claimed in one of the preceding claims, wherein the
thickness of the base bottom contact platelet is less than 0.5 mm, in
particular less than 0.3 mm.
The invention relates to an electric lamp (1) with a base (2). Said base (2) has a base bottom (8), on the outside of which at least one base bottom contact plate is located. Each base bottom contact plate has at least one opening. The material of each opening is bent round into a tongue in such a way that this tongue engages in the base bottom. This ensures that contact plate is better anchored in the base bottom.

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Patent Number

205293

Indian Patent Application Number

IN/PCT/2001/00168/KOL

PG Journal Number

13/2007

Publication Date

30-Mar-2007

Grant Date

30-Mar-2007

Date of Filing

08-Feb-2001

Name of Patentee

PATENT TREUHAND GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH

Applicant Address

HELLABRUNNER STRASSE 1, D-81543 MUNCHEN,

Inventors:

#	Inventor's Name	Inventor's Address
1	MITTLER BODO NELKENSTR	5 S-86356 NEUSASS GERMANY

PCT International Classification Number

H 01J 5/62

PCT International Application Number

PCT/DE 00/00990

PCT International Filing date

2000-04-01

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	299 08 685.2	1999-05-17	Germany