DE2415087A1 - LIGHT SOURCE ARRANGEMENT WITH ELECTRIC LOW VOLTAGE LAMPS - Google Patents

Description

PATKNTA LViV 4.L ΕΈ

DIPL.-ING. C. STOEPEL · DIPL.-ING. W. GOLLWITZER ♦ DIPL.-ING. P.W. MINOR

674 = LANDATJ / PFALZ · AM SCHÜTZENHOI " TEL ·. 06341 / 8000.0085 · TELEX 453333

March 27, 1974

SACHS Systemtechnik GmbH, Schweinfurt

"Light source arrangement with electrical low-voltage lamps"

The invention relates to a light source arrangement with electrical Low voltage lamps. Such low voltage lamps are the usual 110 or 110 for a number of reasons 220 V voltage operated lamps with appropriately designed resistance filaments are preferable. Low voltage lamps are insensitive to shocks to the lamps mentioned and thus have a long service life, what its reason in the fact that at low voltage the filament from a relatively short and thus relatively solid spiral can exist. Further the ratio of light output to heat generation is more favorable. This is the result of the possible higher Annealing temperature. Nevertheless, the glass bulb of the lamp can be kept small due to the small size of the filament, which in turn increases its mechanical strength and thus enables a higher gas pressure in the lamp. This too again leads to an increase in the service life, since with it

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the evaporation rate of the glow coil is reduced. When utilizing the high gas pressure presupposed Halogen effect for the return of particles from the inner surface of the gas piston for the glow coil, the glow temperature and service life can be increased at the same time.

Further advantages and possibilities of low-voltage lamps are known, in particular from the field of motor vehicle lamps. The voltages available there are 6, 12 or 24 V.

Low-voltage lanes are also known for room lighting, e.g. in the form of floor lamps, which are then closed by an iron core Transformers connected to the world-wide supply networks with 110 or 220 V and 50 or 60 Hz will. Such transformers are big and heavy, after all, also expensive, and may still be useful for floor lamps the advantage that cannot be weighed up due to its many disadvantages, that they weigh down the foot of the floor lamp accordingly. In addition to the disadvantages already mentioned, the Transformer the required electrical power to a large extent, sometimes even up to dangerous limits, in heat. This means that such measures to use the very desirable low-voltage lamps in practice and on the market so far were able to enforce. Unless small lamps with low voltage supply were a technical requirement for their function of devices, e.g. in devices in which a point-like light source is necessary.

Another known application of low voltage lamps are the lamps for Christmas trees intended as a substitute for candles, but which are designed to circumvent the heavy and expensive transformer are connected in series. One falls

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If the lamp is off, a whole row of lamps will be de-energized, unless the known bypass switches are again expensive built into these lamps.

The invention is based on the object of showing ways and means of how low-voltage lamps should be designed and can be accommodated in arrangements which permit full utilization of the advantages attributable to them without that the disadvantages associated with their power supply from the usual power supply network occur.

The invention solves this problem by a light source arrangement with electrical low-voltage lamps, in which under the surface of any plate-shaped base a coil fed with alternating current in the range of low ultrasonic frequency for generating an electromagnetic one Alternating field is arranged over the surface of the plate-shaped base as a primary device and secondary devices with low-voltage lamps carried by them or arranged in them and with the winding connected to them Power supply of the lamp or lamps, which can be introduced into the field formed by the primary device and on the plate-shaped Support can be set down, slidable and releasably adhered, are provided. Below the low ultrasonic frequency range is preferably between 5 and 20 KHz. It is e.g. possible to have a table lamp of any design to illuminate any rooms or objects with a low voltage lamp and in the base of the table lamp a winding connected to this low-voltage lamp is to be provided. For the lampstand there is the only one Restriction that it may not consist of electrically low-resistance conductive material.

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The device is extremely simple and cheap. Furthermore, by selecting the number of turns of the winding in the lamp base the operating voltage can be selected as desired, i.e. also as low as desired. Finally it is due to the leakage inductance the winding, a lossless control of the power supply is possible. Assuming that the primary device is also can be used to supply a variety of other secondary devices, the arrangement is even cheaper. In contrast to the use of a 50 Hz transformer, one winding with a very small number of turns is sufficient to apply the voltage required to power the lamp. This winding has a low number of turns Ohra's resistance, the size of which is negligible.

If the lamp is placed exactly over the coil of the primary device, the highest energy transfer is given. the The lamp shines brightly. The light can be continuously adjusted by simply moving it on the plate-shaped base will. It becomes with increasing distance τοη the coil of the Primary device darker. This regulation is lossless and cheaper and probably no longer easier to implement. Of Finally, there is also no galvanic connection through live parts, which should not be underestimated Safety factor is.

It is also possible, in addition to the arrangement of low voltage lamps in table lamps of the usual training the low-voltage lamps to be accommodated in any other equipment. For example, documents or coasters made of translucent or transparent material for any Vessels equipped with such a low-voltage lamp. It is possible also in the bottom of vessels made of translucent or transparent material itself to arrange such low-voltage lamps directly "

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The indissoluble and no longer interchangeable connection of Lamp and device are only possible under the conditions achieved according to the invention. The 'invention Arrangement prevents overloading inrush currents on the filament, so that as a result of this constant current supply the service life of the filament increases considerably. This requirement is met by the coupling coil with a inductive series resistor created. If the incandescent lamp was fed with constant voltage, however, it was very much let it burn through earlier, which might no longer be economically justifiable.

Further features of the invention and details of the advantages achieved by the same emerge from the following Description of various embodiments of the subject matter of the invention, which are shown purely hematically and by way of example in the accompanying drawings.

Fig. 1 shows a table lamp with the inventive Equipment, in

Fig. 2 is an equivalent circuit diagram of the arrangement reproduced,

Fig. 3 shows one with a low voltage lamp equipped base for a vessel,

Finally, Fig. 4 shows a vessel which is itself equipped with a low-voltage lamp, again.

The table lamp shown in Fig. 1 has the usual structure and equipment. It is 1 odorous with one foot

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a screen 2 is provided. At the top of the foot 1 is a For example, a base designed as a simple plug-in fitting for the low-voltage lamp 4, which is connected to and from a filament 5 Lead wires 7 leading to the pinch foot 6 of the lamp are provided. These lead wires 7 are with their corresponding formed free ends introduced into the connector base 3. Any and known other version possible.

In the base 1 of the table lamp there is a winding 8 from which connecting wires 9 lead to the plug base 3. Lamp base and lampshade can be designed as desired. There are just as few limits here as with table lamps of the conventional type, which are galvanically connected to the power supply network in a direct way via metallic conductors stand. There is only the insignificant restriction that the lamp base is not made of electrically low-resistance conductive Material should exist.

By preselecting the number of turns of the winding 8, the operating voltage for the low-voltage lamp 4 can depending on The existing conditions can be chosen as low as desired. In addition, the leakage inductance of the winding 8 forms an inductive one and lossless series resistor, as shown by the Equivalent circuit diagram according to FIG. 2 is to be explained in more detail. There is the winding of the primary device with 10 and its Capacitance, which together with the winding 10 forms an oscillating circuit, is denoted by 11. The further training of this primary device is not the subject of the present invention and is already in other applications going back to the inventor described. The winding 8 assigned to the secondary device, that is to say the table lamp, is in series with the load resistance 12, which is formed by the filament 5 of the lamp 4,

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switched. The leakage inductance of the winding 8 is indicated by a further winding 8a.

The leakage inductance 8a becomes more effective the higher it is Current the load resistor 12 draws. This creates an automatic current limitation. The load resistor 12 is so not a certain tension imposed. This results in a further protection and the service life of the lamp increasing effect.

In addition, the light of the table lamp can be easily Way are performance-regulated. If the lamp is exactly above the primary device, then the winding 8 is exactly above the winding 10 of the primary device is the highest possible Energy transfer available, so the lamp shines brightly. By simply moving it to the side from this position the brightness of the lamp can be continuously adjusted. It gets darker as the distance increases. This regulation is lossless.

By supplying the luminaire without any live metal connecting conductors, operation is extremely safe. If such a lamp falls over, for example, it is automatically removed from the supplying electromagnetic alternating field and goes out. If, for example, it falls off the bedside table, it is automatically switched off. Neither the electricity nor the heat generated by the lamp can damage it. Since low-voltage lamps, as described at the beginning, can be manufactured in the smallest dimensions, there are practically unmanageable further installation options -,

SQo can e.g. be coasters or pads for devices and Vessels, provided they are made of transparent or see-through

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Material, with appropriately designed lamps, e.g. with miniature incandescent lamps and a winding to supply them be equipped. These lamps can also be arranged in the devices or vessels themselves.

In this context, only two examples will be described and explained below, the solutions for an important problem in today's civilization-dependent society. It was found that with Television the screen as the only light source can be unfavorable and even harmful to health if exposed for a long period of time can. Accordingly, the realization has prevailed that a little illumination of the room, regardless of * that through the screen of the television set, is desirable or necessary. On the other hand, the consumers care to consume drinks and the like from television programs Invention of the way, the corresponding necessary devices or vessels, e.g. for drink consumption, accordingly to be trained as light sources. On the one hand, this results in the desired light source that is independent of the television screen. These The light source also serves as a guide to drinks or the like in the largely darkened room. In the end can adjust the brightness of this light source or light sources in the prescribed manner easily and without loss be managed.

In Fig. 3 a wine glass 21, for example in the known Roman shape, is indicated, which stands on a coaster 22. This coaster can optionally, as indicated, be provided with an edge 23 into which the foot 24 of the wine glass 21 snaps can so that the coaster 22 is moved with the glass.

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Likewise, however, the coaster can also be designed as an independent part, possibly with means for complete or at least partial adhesion to the plate-shaped base, e.g. a table top, under the surface of which the primary device (s) are located.

In the coaster 22 is now a miniature incandescent lamp 25 with a Filament 26 arranged. Through the pinch feet 27 of the lamp 25, connecting wires 28 lead to the also in the saucer 22 housed winding 29.

If the coaster 22 is connected to the glass 21, it is sufficient to place the glass with the coaster in the area of the through the Primary device to bring generated electromagnetic field and the lamp 25 lights up in from the distance to Winding of the primary device depending on the brightness. If the coaster is designed as an independent part, it remains lie on the table top when removing the glass and serves as a guide for returning the glass to the table.

Another possibility is indicated in FIG. 4. Thereafter For example, a lamp 31 'can be accommodated directly in the base or the bottom 32 of a vessel, e.g. a drinking glass 33. The floors Such glasses are usually provided with a cavity 34. If this is not the case, it can be specially designed for this trained glasses are provided. In this cavity, the lamp 31, which is in a part 35 made of transparent or translucent material is poured into his The shape and size of the cavity 34 corresponds to be accommodated. Here, too, the lamp 31 is above lines 36 again with a WidsLung 37 in connection, which is also cast in the part 35 »This part 35 can introduced in the simplest manner in the cavity 34 of the vessel bottom and fixed there, e.g. glued.

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A wide variety of lighting effects can be achieved with the appropriate number of glass shapes and colors
among other things, the directed light conductivity of the glass can also be used. The number of effects can be increased by covering appropriate areas of the bottom of the vessel.

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Claims (5)

Claims (1. ) J light source arrangement with electrical low-voltage larapen, characterized in that under the surface of any plate-shaped base a 'fed with alternating current in the range of low ultrasonic frequency coil for generating an alternating electromagnetic field is arranged over the surface of the plate-shaped base as a primary device and secondary devices with through these carried or arranged in these low voltage see lamp η and with these connected winding for the power supply of the lamp or lamps, which can be introduced into the field formed by the primary device and can be placed, displaced and releasably adhered to the plate-shaped base, are provided. 2.) Light source arrangement according to claim 1, characterized in that a table lamp as a secondary device Design with a low voltage lamp and a arranged in the foot of the table lamp and provided with the low-voltage lamp in connection winding. 3.) Light source arrangement according to claim 1, characterized in that an arbitrarily formed pad or a coaster for equipment is provided as the secondary device, which consists of translucent or transparent material and is equipped with a low-voltage lamp and a winding associated with this . ■ ■ ■ 5098A1 / 0089 4.) Light source arrangement according to claim 1, characterized in that that to be introduced as secondary devices into the electromagnetic alternating field generated by the primary device Equipment, preferably vessels made of transparent or translucent material are provided in their Floor or base a low-voltage lamp and in connection with this a winding are arranged. 5.) Light source arrangement according to claim 1 to 4, characterized in that the winding for Stromver supply the lamp or larapen simultaneously serves as a leakage inductance for automatic current limitation. 509841/0089 Blank page