Illumination – Revolving
Patent
1991-06-04
1992-06-30
Dority, Carroll B.
Illumination
Revolving
362102, F21V 704
Patent
active
051269228
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an umbrella or a parasol of the kind set forth in the preamble of claim 1.
BACKGROUND ART
U.S. Pat. No. 3,275,815 describes umbrellas or parasols of this kind, in which the inside of the cover is illuminated by means of a single light-spreading device, the latter being supplied with light through a light conductor leading from the source of light, usually a battery-powered electric bulb situated in or near the handle of the umbrella or parasol. The use of a single light-spreading device has, however, proved insufficient to provide a reasonably uniform illumination of the whole of the inside of the cover.
DISCLOSURE OF THE INVENTION
It is the object of the present invention to provide an umbrella or a parasol of the kind referred to above, in which it is possible to obtain a more uniform illumination of the inside of the cover than previously possible, and this object is achieved with an umbrella or a parasol, according to the present invention further exhibiting the features set forth in the characterizing clause of the claim 1. With this arrangement, the inside of the cover is illuminated by two mutually independent light-spreading devices, making it substantially easier to provide a uniform illumination of the inside of the cover.
Advantageous embodiments of the umbrella or parasol according to the present invention, the effects of which are explained in the following detailed portion of the present specification, are set forth in claims 2-10.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following detailed specification the present invention is explained with reference to the drawings in which
FIG. 1 is an overall view of an exemplary embodiment of an illuminated umbrella according to the present invention, shown in elevation and partly in section,
FIG. 2 is a vertical sectional view showing the transition region between the outer light conductor and the associated reflecting surfaces,
FIG. 3 shows the reflecting surfaces shown in FIG. 2 as viewed from below,
FIG. 4 is a vertical sectional view showing the transition region between the inner light conductor, the reflecting surfaces associated therewith and further means supplied with light from these reflecting surfaces,
FIG. 4a shows the member according to FIG. 4 carrying the light-reflecting surfaces, viewed from below, and
FIGS. 5 and 6 are diagrammatic vertical sectional views showing the lower ends of the light conductors and the light source with the latters electric light bulb in two different positions.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The umbrella 1 shown in FIG. 1 comprises in the usual manner an umbrella stick 2 and a cover 3, the latter being held in the open position shown by a number of ribs 4 supported by struts 5 on a slide 6, with which the cover 3 may be collapsed in the usual manner by moving the slide 6 towards the handle 7.
In the exemplary embodiment of an umbrella according to the present invention shown in FIG. 1, the handle 7 comprises a battery (not shown), an electric light bulb 8, a reflector 9 and a lens 10, the latter three items being shown in FIGS. 5 and 6.
The exemplary embodiment shown in FIG. 1 also comprises various optical means to be described below, with which peripheral regions thereof, rib caps 11, and
As may be seen especially from FIGS. 2, 5 and 6, the umbrella according to the present invention comprises an inner light conductor 13, and coaxial therewith an outer light conductor 14.
The output end 15 of the outer light conductor 14 is adapted to emit light towards a number of concave reflecting surfaces 16 adapted to reflect the light from said output end 15 towards the non-central regions of the umbrella cover 3. In order to make the angle 17, through which the light is distributed in the vertical direction (i.e. parallel to the stick 2), smaller than the angle 18, through which the light is distributed in the peripheral direction, so as to ensure a reasonably uniform illumination of the cover 3 with a minimum of light lost below its edge, the c
REFERENCES:
patent: 3275815 (1963-09-01), Petroff et al.
patent: 4099535 (1978-07-01), Hubachek
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