DE821325C - Arrangement for lighting theater stages - Google Patents

Description

a) In the description on page 2, lines 8 to 16 have been deleted and replaced by the following text: According to the invention, a very advantageous device for illuminating the stage ceiling is obtained in theater stages separated from the auditorium, in which the disadvantages mentioned are avoided by fluorescent tubes are used as a lighting element, in which such fluorescent substances or filling gas are introduced in such a composition that they emit a sky-blue color required for coloring the stage sky without additional color filters.

b) In the description on page 2, the following text has been inserted in line 41 after the word "had to." For example, a dance hall 5 has been described in which part of the floor is designed as a raised podium and the entire hall is illuminated with fluorescent lamps, these are arranged so that the raised area receives twice the luminance as the rest of the hall. Next lamps are already known for loading become Beleuchtun- of theatrical facades of theater lobbies (foyers), and in particular for advertising signboards and neon signs. In addition, the use of high-voltage supplied gas discharge tubes for a curtain that covers the stage behind when the scene changes has been described. c) The previous claims have been replaced by the following claims: i. Arrangement for illuminating the stage sky in the theater stages separated from the auditorium, characterized in that fluorescent tubes are used as the lighting element, into which such fluorescent substances or filling gas are introduced in such a composition that they emit a sky-blue color required for coloring the stage sky without additional color filters.

2. Arrangement according to claim i, characterized in that in their Brightness by fluorescent tubes regulated by stage lighting control devices are used.

3. Arrangement according to claim i and 2, characterized in that high-voltage fluorescent tubes are used.

4. Arrangement according to claim i and -, characterized in that flickering phenomena when switching on and off by interrupting the circuit in the area of the flicker voltages are avoided by appropriately arranged limit switches on the controller or by insulating parts on the contact path of the controller.

5. Arrangement according to claim i to 4, characterized in that the leakage field transformer or transformers are assembled with the associated lighting device or devices. Arrangement for lighting theater stages On the stage in theater systems, lighting devices in various designs, which primarily have the effect of floodlights, have been used to illuminate large areas, primarily for lighting the decorations, play areas, circular horizons, etc. They% "- are usually referred to as skylights, play area lights, liorizont lights'. In these lighting devices, incandescent lamps with metal filaments are predominantly used, which have a guaranteed service life of 10000 burning hours the light exit opening of the Beleilclitiiii, L; "; 1, iirl) ers color filters made of glass or other transparent or translucent materials, e.g. B. plastics, inserted.

The efficiency of incandescent lamps is known to be very low. A large part of the energy used is converted into heat, while another is uselessly lost due to the color filtering of the light. Depending on the color, the absorption loss ranges from 40 to 97%. When filtering the color sky blue, which is mainly used to color a stage sky with a deep sky blue color, the efficiency is only about 5 to 30/0. In view of this, in order to obtain sufficient luminance on a stage canopy, a large number of horizon lights must be placed on the stage. In addition, when the metal filament lamp is regulated, i. H. in the case of a voltage-regulated incandescent lamp, the color should not change. As is well known, however, the spectrum changes with a voltage-regulated incandescent lamp in such a way that the red rays - essentially in the dark position - have a reddish tinge to the blue color.

N d # - however, the disadvantages listed can be eliminated if fluorescent tubes are used for these illuminations. The main advantages of this compared to the use of metal filament lamps that have been common since then are the better light output (about 15 to 22 Lm / W to 3o to 4o Lm / W) - the service life (iooo hours to about 5,000 hours), the immutability of the color Voltage regulation and the elimination of heat.

The charisma of a Bührtenhimmel, as z. B. is required to represent a bright summer day, made the suspension of a large number of lights with metal filament lamps ' angry. Since then, single lights have been used for this purpose, with one lamp, mostly 100 or 1500 W, and also so-called triple lights, which are equipped with three such lamps. The heat generated by these lamps always had to be taken into account. The heat generated in the luminaires largely determined the size of the luminaire. It has had an unfavorable effect on the service life of the incandescent lamp and also on the durability of the pre-installed color filters. In turn, the relatively large design of the lamp as a result has had a very disruptive effect on the so-called horizon lamp frames, on which the horizon lamps are hung on the stage, when it is accommodated. In many cases, one or even two such scaffolds were not enough. The space on the stage required to accommodate these scaffolding took up a great deal of space on the stage that had to be taken away from the rest of the stage machinery, especially the decoration trains. In order to achieve the required brightness on the stage, high pressure mercury vapor lamps have also been used, which have a better light output than metal filament lamps. However, these lamps do not have a continuous spectrum. As is well known, the colors green and yellow are particularly prominent here, while blue and violet are less intense, so the color blue, which is most important for the blue illumination of the horizon, is relatively little available. The biggest disadvantage, however, was that the brightness of these vapor lamps could not be changed electrically.

In all of these luminaires mentioned, strongly scattering reflectors were used used, which irradiate the surfaces to be illuminated evenly.

All of these disadvantages are eliminated by using the fluorescent tubes, especially the high-voltage fluorescent tubes, on the stage. By. the . better light output of these tubes, a lot of space is required for the accommodation. From now on it is no longer necessary to take the accumulation of heat into account. Any number of tubes in a lighting device can be lined up next to each other and one behind the other. As a result, the space required for accommodating these tube lighting devices on the horizon light framework becomes significantly smaller, the framework becomes lighter and thus the required effort is also reduced. In many cases you will even save a scaffold. The light output can take on larger dimensions and increase the effect. A substantial increase in the light output without increasing the space requirement is to be expected, especially when using Superlux or high-performance tubes. The increased light output also reduces the number of control circuits and thus the size of the stage controller, which in turn simplifies operation. The color can also be achieved either through the composition of the filling gas or through the selection of suitable filter glasses for the tubes or through their introduction. be influenced by fluorescent phosphors or by a suitable combination that the use of additional color filters is generally unnecessary.

The peculiarity of the gas discharge tubes that they do not emit concentrated light as a result of their expansion makes the Himinelsraum of the stage appear as a space flooded with light, which significantly increases the effect of the lighting. An essential advantage of these tube lights when used on the Bührie, especially when using high-voltage fluorescent tubes, is the electrical controllability of the brightness. You do not need any mechanical darkening means with these fluorescent tubes, as z. B. is the case with high-pressure mercury vapor lamps. The quirk. (Let the fluorescent tubes show flickering when they are switched on and off at around the limit of 10 to 120V, i.e. where the glow discharge periodically stops, can be left open by so-called limit switches on the controller. With the Bordoni AC controller system, insulating parts are on the contact track at this winding point applied, which only switch the control circuit on or off at the voltage of I 1 0 to 120 V.

In order to make the use of high voltage on the stage harmless, the stray field transformers are installed as close as possible to the lighting equipment or even on it. The devices themselves have the usual protection against accidental contact. This makes it possible to use the fluorescent tubes not only for illuminating the horizon, but also for skylights, foot ramps, play area lights and other lighting systems. The drawing shows, as an exemplary embodiment of the new arrangement, the model of a stage lighting device. 1, 2 are fluorescent tubes which are arranged in a housing stand 3 and can be connected to voltage by means of the terminals .4. In the sense of the above description, modifications in the design can be carried out according to the suggestions made. PATENT CLAIMS: i. Arrangement for lighting theater stages, characterized in that fluorescent tubes are used as the lighting element.

2. Arrangement according to claim i, characterized in that fluorescent tubes are used in which the coloring of the emitted light is due to the composition of the filling gas, or by particular choice or treatment of that used for the tubes Glass or is influenced by the introduction of fluorescent substances.

3. Arrangement according to claim i and: 2, characterized in that fluorescent tubes regulated by stage lighting control devices are used in their brightness.

4. Arrangement according to claim i to 3, characterized in that high-voltage fluorescent tubes are used.

5. Arrangement according to claim I to 4, characterized in that flickering phenomena when switching on and off are avoided by interrupting the circuit in the area of the flicker voltages by appropriately arranged limit switches on the controller or by insulating parts on the contact path of the controller.

6. Arrangement according to claim i to 5, characterized in that the leakage field transformer or transformers are assembled with the associated lighting device or devices.