| 摘要 |
A track lighting system having an elongated dielectric support having a pair elongated, parallel channels formed on opposing surfaces of the support. Each of the channels has a front and rear sidewall. The front sidewalls of each of the channels are bridged by a concave, arcuate shaped frontal portion of the housing. The rear sidewalls are bridged by a flat rearward portion of the housing. A pair of elongated, electrically conductive busses is provided. Each one of the busses is disposed in a corresponding one of the channels. With such an arrangement, the flat rearward surface is adapted for affixing the support to a structure such as a display cabinet and the frontal portion protects against accidental electrical short circuits from being produced between the busses by metal objects in the cabinet. An electrical fixture is provided. The fixture includes a pair of dielectric housings each having a pair of electrical conductors. A first one of the electrical conductors of the pair of housings are arranged in electrical contact at a region disposed along a longitudinal axis passing through the pair of housings. The second electrical conductor of one of the pair of housings has a ring-shaped electrical contact. The second electrical conductor of the other one of the housings has a surface in contact with a surface of the ring-like member so that as the housings rotate with respect to each other about the longitudinal axis, the first electrical conductors maintain electrical connection with each other and the second electrical conductors also maintain electrical connection with each other.
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