Miniature filament lamp having planar contact surfaces...

Details Miniature filament lamp having planar contact surfaces... Miniature filament lamp having planar contact surfaces...

1999-02-26

2001-07-24

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

C313S573000, C313S634000, C313S318010, C313S318050, C313S318100, C439S057000

Reexamination Certificate

active

06265824

ABSTRACT:

The invention relates to a miniature incandescent lamp in accordance with the preamble of patent claim
1
.
I. PRIOR ART
Such a miniature incandescent lamp is disclosed, for example, in German Utility Model G 296 10 849.9. The miniature incandescent lamp described in said printed publication is provided for mounting on a printed circuit board and has a base with two U-shaped electric base contacts, a cylindrical lamp bulb fixed in the base, and two supply leads which are guided out of the lamp bulb and are connected in an electrically conducting fashion to a U-shaped base contact. The U-shaped base contacts have a plane contact surface in each case.
II. DESCRIPTION OF THE INVENTION
It is the object of the invention is to provide a miniature incandescent lamp having improved base contacts.
This object is achieved according to the invention by means of the characterizing features of patent claim
1
. Particularly advantageous embodiments of the invention are described in the subclaims.
The miniature incandescent lamp according to the invention has two electric base contacts fitted in each case with a plane contact surface. According to the invention, each base contact has an integrally formed section angled away from the plane contact surface and constructed like tongs. The section shaped like tongs ensures reliable anchoring of the base contact in the lamp base. Moreover, each base contact is fitted with an integrally formed hook-shaped section into which one of the supply leads is inserted in each case and fastened in an electrically conducting fashion. The hook-shaped sections of the base contacts permit reliable fastening and contact-making of the supply leads guided out of the lamp bulb to and with the base contacts. The base contacts are advantageously constructed in one piece in each case. The hook-shaped section of the base contact is advantageously integrally formed on the section of the base contact constructed like tongs. The miniature incandescent lamp according to the invention advantageously has a plane bottom surface in which the plane contact surfaces of the base contacts are advantageously arranged. It is thereby easier to mount the miniature incandescent lamp according to the invention on a printed circuit board.
III. DESCRIPTION OF THE PREFERRED EXEMPLARY EMBODIMENT
The invention is explained in more detail below with the aid of a preferred exemplary embodiment. In the drawing:
FIG. 1
shows a side view of the miniature incandescent lamp in accordance with the preferred exemplary embodiment,
FIG. 2
shows the topside of the miniature incandescent lamp illustrated in
FIG. 1
,
FIG. 3
shows the underside of the miniature incandescent lamp illustrated in
FIG. 1
,
FIG. 4
shows a side view of a base contact of the miniature incandescent lamp illustrated in
FIG. 1
,
FIG. 5
shows the front side of the base contact illustrated in
FIG. 4
, and
FIG. 6
shows the underside of the base contact illustrated in FIG.
4
.


REFERENCES:
patent: 3648044 (1972-03-01), Barnard et al.
patent: 4181390 (1980-01-01), Aizawa
patent: 5209668 (1993-05-01), Higano et al.
patent: 29610849 (1996-10-01), None
patent: 0139510 (1985-05-01), None
patent: 1236261 (1971-06-01), None
patent: 1247850 (1971-09-01), None

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