DE1039965B - Adjustable lampshade - Google Patents

Description

The invention relates to an adjustable, frustoconical larape umbrella.

There are lampshades of various shapes known. They usually have the same characteristic a more or less immutable form. Their position against the light source is normal fixed. Up to now, however, there is no known screen with an arbitrary continuous variability of shape, in which the light cone between an almost completely uncovered light source to a light cone directed upwards or downwards can be changed.

Lampshades are already known which can be spread apart like an umbrella; there however, the arrangement of the light source in both cases is such that it will work with the intended mechanism remains below the screen, the only effect that can be achieved is that the one that is reflected downwards Lichtschein is more or less summarized. There is now also an adjustable lampshade a frustoconical shell made of elastically deformable material with spoke-shaped struts known, through which the jacket can be spread apart like an umbrella and the pivot points for Light source are so that when turning the struts, the light source from a position under the screen gets into one above the screen.

The invention now relates to such a lampshade and consists in the fact that the struts are articulated at their inner end around a ring which can be displaced in the direction of the lamp axis by means of a handle and forms the smallest Dwfdvrt \ esser of the truncated cone jacket, with which they are further outside, in a horizontally planar pivot points perpendicular to the lamp axis can be pivoted in such a way that they form the stiffening for the frustoconical jacket opening either downwards or upwards. The struts are pivoted through the horizontal plane, ie rotated. The lampshade according to the invention can thus assume a much more varied shape than the known design, because the pivot radius corresponds to the whole instead of half the surface line; the construction is also simpler, the support baskets are omitted.

An advantageous further development of the invention consists in the fact that the strut pivot points are in a fixed position on a ring which lies in a horizontal plane passing through the light source, the struts Have elongated holes in which this ring slides.

Means are provided on the adjustable lampshade according to the invention which make it possible to continuously stretch the angle of the cone generating from an acute angle up to 180 ° and then continue to change towards 360 ° until the truncated cone adjustable lampshade

Applicant:
Georg Rauch, Vienna

Representative: Dipl.-Ing. K. Blank, patent attorney,
Munich 22, Widenmayerstr. 36

Claimed priority:
Austria from March 14, 1955

^ f-tU "iCtJlt

is changed from a shape with the tip pointing upwards into one, the tip of which is after is below.

In order to give the screen the opportunity to follow this movement, the jacket must be made of a connection consist of elastic and rigid materials. So it is made of an elastic coat with stiffening ribs or a folded (pleated), semi-rigid material or advantageously composed of overlapping segments be.

As a means for bringing about the above pivoting movement of the generators, the struts are hinged at one end to a horizontal ring or the like. At its middle part, further joints are provided, which are either connected to a sliding sleeve located below, as in the case of an umbrella, by struts also hinged to this, or the joints consist of a connection of straight guides and pivot bearings, as they are, for example, when the generators in Middle part contain slots lying in their axial direction, through which a horizontal ring is drawn. The axial guide of this ring may again by a sliding sleeve (handle) can be brought about, which is on the vertical, rod-shaped foot of the lamp on or moved from and to the ring, for example by spokes, \ ^r is erbunden.

The essence of the invention is shown below in a schematic representation, for example in the drawing shown. It shows

Fig. 1 the lampshade in different positions (drawn out and dashed),

809 640/82

Claims (3)

Fig. 1 a in plan view and elevation, a generating rib. FIG. 2 shows another embodiment, the ribs being connected to the adjusting handle by joints and struts, FIG. 3 the subject matter of the invention as a hanging lamp. In Fig. 1 1 it denotes the rod-shaped «! Stalk. 2 the sleeve designed as a handle, which can be moved up or down with the handle 1 as a guide, 3 the lamp holder attached to the handle 1 with a screwed-in bulb, 4 a ring that is rigidly connected to the handle 2 by the spokes 7 and to which the ribs 6 forming the screen are articulated in a radial fashion. The ring 5 is firmly connected to the handle 1 by the spokes 8 below the socket 3. 1 a shows a rib 6 in an exemplary embodiment, which has a reinforcement 9, the ring 5 then sliding in the slot 10 provided in this reinforcement 9 when the handle 2 is pulled down. The mode of operation of a lampshade according to Fig. 1 and la is as follows: In the starting position I, the screen is with the tip up and the light cone of the lamp is limited by it directed downwards. A small part of the light is directed upwards through the hole in the ring 4. However, if the handle 2 is pushed down, the ring 4 is lowered and the ribs 6 pivot about the joints on ring 4 up to position II. In which they are horizontal. In this position, the light source is more or less free both above and below the screen and illuminates the entire room. If the handle 2 is lowered further, the screen arrives in position III, in which the truncated cone is directed upwards and all of the light is more or less radiated upwards. 2 shows a similar effect when the handle 2 is pushed up. However, the lampshade shown here differs from that shown in FIG. 1 in that the ribs 6 are connected to the handle 2 by the joints 11 and the struts 12 by the joints 16 are. Here the lamp socket 3 is connected to the handle 2 by the tube 13, so that the light source is lifted over the ring 4 when the handle 2 is pushed up. Fig. 3 shows an example embodiment of the lampshade according to the invention for a hanging lampshade. It again denotes 1 the rod-shaped stem, which this time is directed towards the ceiling and attached to it, 2 the handle for adjusting the angle of the umbrella cone, 3 the lamp holder attached to the stem 1, 4 a ring that slides through the spokes 7 with the one sliding on the rod 1 Guide 14 is connected. 15 are the spokes that hold the handle 2, 6 are the ribs, which are linked to the ring 4 in a radial fashion. The ring 5 is firmly connected to the handle 1 above the socket 3 by the spokes 8. The mode of operation corresponds to that described for FIG. 1. The invention described above has the advantage that the user of this type of lampshade can effortlessly adjust to the most comfortable light cone and thus avoid the glare or the inability to use the light source, which is always perceived as a defect, due to excessive shielding. The special position of the screen, in which he z. B. is stretched horizontally to 180 °, allows almost one hundred percent utilization of the light source, since the screen in this position makes almost no shadow. The field of application of the invention is not only limited to all sizes of floor and arc lamps, but also to hanging lamps and those that are to be mounted on the wall, more or less forming half a truncated cone. The shape of these lights can be varied according to fashion and taste. 2i> P.ATFNTANSPROCHE: 1. Adjustable lampshade with a frustoconical surrounding the light source Sheath made of elastically deformable material and spoke-like struts through which the sheath Can be spread apart like an umbrella, characterized in that the struts on their inner end around a displaceable in the direction of the lamp axis by means of a handle, the smallest diameter of the frustoconical jacket forming ring are articulated with which they are around farther out, such pivot points lying in a horizontal plane perpendicular to the lamp axis are pivotable that they are the stiffener for the either down or up Form opening frustoconical jacket. 2. Lampshade according to claim 1, characterized in that with a fixed position of the strut pivot points on a ring which lies in a horizontal plane passing through the light source, the Struts have elongated holes in which this ring slides. 3. Lampshade according to claim 1, characterized in that the truncated cone jacket from overlapping segments is formed. Considered publications:
German patent specifications No. 406 406, 425 607:
British Patent Nos. 167 546, 244 704. 1 sheet of drawings 640/82 9. 58,