초록 ▼

Two nested downwardly diverging frustoconical lamp shades are supported at their upper ends by a base which also supports a lamp bulb. The shades have openings therein which, when aligned by adjustment of one of the shades, passes a beam of light from the bulb to a reading or like area. The intensit

Two nested downwardly diverging frustoconical lamp shades are supported at their upper ends by a base which also supports a lamp bulb. The shades have openings therein which, when aligned by adjustment of one of the shades, passes a beam of light from the bulb to a reading or like area. The intensity of illumination can be controlled by changing the extent of overlapping of the openings. Shade elements extend across the lower ends of the shades and have openings therein. One of the shade elements is adjustable relative to the other to move the openings therein in and out of register with the openings in the other element whereby to vary the intensity of illumination of light projected downwardly by the lamp bulb.

대표청구항 ▼

A lamp for reading or similar purpose comprising: a base for supporting a light source therebelow; a first shade having a shape to surround said light source; means on said base for supporting said first shade at the upper end thereof; said first shade having a first opening therein for permitting p

A lamp for reading or similar purpose comprising: a base for supporting a light source therebelow; a first shade having a shape to surround said light source; means on said base for supporting said first shade at the upper end thereof; said first shade having a first opening therein for permitting passage of light therethrough from said light source; a second shade having a shape to surround said first shade; said second shade having a second opening for permitting passage of said light therethrough from said first opening; said second shade adapted for rotational adjustment about said first shade whereby to cause said opening to vary the amount of light passing therethrough; a first shade element extending across the lower end of one of the above-mentioned shades; said first shade element having a third opening therein; a second shade element extending over said first shade element; said second shade element having a fourth opening therein for passing light therethrough from said third opening; and means supporting said second shade element for movement relative to said first shade element whereby to cause said third and fourth openings to vary the amount of light passing therethrough.