Ring-shaped lamp device having bulb tiltable relative to base structure
AssigneeToshiba Lighting & Technology Corporation
InventorsMasaharu Baba, Takao Mizukami, Masako Nakamura
Life of this patent
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Abstract
A lamp device includes a ring-shaped bulb, terminated at a prescribed annular length, each terminated portion of which is formed in a linear shape so as to make the bulb axis of one of the terminated portions coincide with that of the other terminated portion, and a base structure rotatably mounted around the opposite terminated portions of the bulb. Thus, the location of the bulb can be adjusted to a desirable position by the rotation of the bulb when the lamp device is attached to an external supporting device.
Claims6
A ring-shaped lamp device which is supported by an external supporter, comprising:
- a bulb including:
- a tubular ring-shaped body portion having a defined annular length, and
- a pair of tubular linear portions each having a defined length, a first end of each tubular linear portion being integrally connected, as one piece, to a corresponding end of the tubular ring-shaped body portion, the second end of each tubular linear portion being sealed, the second end of one tubular linear portion facing the second end of the other tubular linear portion so that the bulb axis of the one tubular linear portion coincides with that of the other tubular linear portion;
- a pair of electrodes, one of which is disposed in each of the tubular linear portions, for producing discharge therebetween through the tubular ring-shaped body portion;
- a base structure having a connector which is adapted to be connected to the pair of electrodes, the base structure being rotatably connected around the outer surfaces of the tubular linear portions so that the lamp is rotatable with regard to the connection between the base structure and each outer surface of the tubular linear portions;
- and
- two heat shrinkable tubular pieces which cover the ring-shaped body and the linear portions, one end of each tubular piece overlapping one end of the other tubular piece at the ring-shaped body overlap portion located substantially midway between the ring-shaped body portion corresponding ends.
Dependencies are inferred from the claim text.