DE29518752U1 - Gas discharge vessel for fluorescent lamps with a base on one side - Google Patents

Description

Prof. Dr. h.c. Ing. Walter Holzer Hz/G 317-3

Drosteweg 19, D - 88709 Meersburg

Utility model application

Gas discharge vessel for single-ended fluorescent lamps

The compact lamps commonly used today usually have gas discharge vessels, which consist of one or more U-shaped glass tubes that are connected to one another to form a longer discharge path.

Although this design is technically satisfactory, such compact lamps cannot easily be used in decorative lighting fixtures to replace conventional incandescent lamps; partly because they are much longer than conventional incandescent lamps, but also because they are disturbing in appearance and shape.

This is especially true for miniature lamps, which are used in huge numbers as so-called "candle lamps". It is not just the size that is disturbing, but also the appearance of such fluorescent lamps with U-shaped bent tubes.

The object of the invention is to provide a solution that is technically simple and also aesthetically satisfactory while retaining the existing dimensions of incandescent lamps. According to the invention, this is achieved by making the glass tube (1) look like a tapered candle lamp with a V-shaped bend (9).

Hz/G 317-4

For somewhat higher powers, it is also proposed to provide an intermediate area (5) adjacent to the V-shaped bend (9) in order to continue the length of the glass tube (1) parallel to the two socketed ends (4) in order to increase the discharge length.

It is also expediently proposed to design the parts of the glass tube (1) in the intermediate region (5) by mutual twisting to form a double spiral (6), so that longer discharge lengths are achieved without increasing the length of the lamp.

The outer diameter of such a double helix (6) is optimal according to the invention if the outer diameter corresponds to the original outer dimension of the parallel parts (8) of the glass tube (1).

Especially in the case of miniature lamps, it is also recommended that the distance between the parallel parts of the glass tube (1) or the interior of the coil (6) be sufficiently large to accommodate at least parts of a ballast (7).

The schematic representations in Fig. 1 to 6 serve to better understand the inventive concept, but they are not to be construed as limiting in terms of dimensions or construction, but rather show further clear advantages of the invention, e.g. the type of base (3) E 14, E 27 or bayonet, or the shape of the housing (2) can be changed as desired.

Fig. 1 shows the simplest form of a miniature lamp according to the invention in "candle shape" with a 14 mm Edison base (3) which is connected to the housing (2) in which the glass tube (1) with its V-shaped bend (9) is also attached. The two parallel parts (8) are so far apart that the ballast (7) at least partially fits between them.

Hz/G 317-5

Fig. 2 shows a similar design for slightly higher power, whereby the ballast (7) is naturally also designed somewhat larger. For this purpose, the parallel parts with the ends (4) are designed somewhat longer.

Fig. 3 shows another variant of a miniature lamp according to the invention, in which the glass tube parts provided in the intermediate region (5) are spiraled in a circle around the longitudinal axis (10) at the V-shaped bend (9). This results in a longer discharge path and thus a greater light output for the same length of the lamp.

A further increase without increasing the overall length is achieved, as shown in Fig. 4, by twisting the ends (4) of the glass tube (1) by approximately 180° relative to the V-shaped bend (9).

Finally, Fig. 5 and 6 show an example of how the light output of the lamp can be increased significantly further, namely by spiraling the ends (4) of the glass tube (1) as shown schematically in these two figures. The example shows a spiral of 450°. The diameter of the double spiral (6) can be determined as required. Fig. 6 shows the same lamp twisted by 90°.

What all examples have in common is that they essentially create the appearance of a candle-like luminous surface, using the available space as economically as possible and observing the simplest manufacturing processes.

Claims (6)

Prof. Dr. h.c. Ing. Walter Holzer Hz/G317-1 Drosteweg 19, D - 88709 Meersburg Protection claims Gas discharge vessel for single-ended fluorescent lamps 1. Gas discharge vessel for single-ended fluorescent lamps, comprising a glass tube (1) fitted with electrodes, the inner wall of which is coated with phosphor which is made to glow by UV radiation from a gas filling, and the capped ends (4) of the glass tube (1) are held parallel in a housing (2), characterized in that the glass tube (1) is bent in a V-shape. 2. Gas discharge vessel according to claim 1, characterized in that the glass tube (1) has an intermediate region (5) between the V-shaped bend (9) and the parallel ends (4), in which the two parts (8) of the glass tube (1) run parallel. 3. Gas discharge vessel according to one of the preceding claims, characterized in that the glass tube (1) has an intermediate region (5) between the V-shaped bend (9) and the parallel ends (4), in which the two parts of the glass tube (1) are formed as oppositely directed spirals (6). 4. Gas discharge vessel according to one of the preceding claims, characterized in that the outer diameter of the coil (6) corresponds to the original outer dimension of the parallel parts (8) of the glass tube. Hz/G 317-2 5. Gas discharge vessel according to one of the preceding claims, characterized in that the distance between the parallel parts (8) of the glass tube is sufficiently large to accommodate at least parts of a ballast (7). 6. Gas discharge vessel according to one of the preceding claims, characterized in that the inner diameter of the coil (6) is sufficiently large to accommodate at least parts of a ballast (7).