Detection of light-producing events
AssigneeASEA Aktiebolag
InventorCarl E. Lindgren
Life of this patent
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Abstract
A device for detecting undesired, light-producing events in a protected installation, for example arcing of electrical apparatus or the outbreak of fire in a building, comprises a detector for receiving light produced directly or indirectly by the undesired event and directing at least part thereof into the field of view of fiber optic means which transmits at least part of the received light to a monitoring unit. The detector is in the form of material applied to an end of the fiber optic means situated at the protected installation, the detector material being in the form of at least one light-transmitting body with a large number of light-refracting surfaces within the same which refract received light and conduct at least part of the refracted light into the field of view of the fiber optic means.
Claims10
In a device for detecting an undesired, light-producing event in a protected installation, said device including a detector, a fiber optic means and a monitory unit, said detector being capable of directing at least part of the light produced by the undesired event into the field of view of a first end of the fiber optic means, the second end of the fiber optic means being connected to said monitoring unit, the improvement wherein said detector comprises at least one body surrounding said first end of said fiber optic means, each said body being composed of a material which defines therein a plurality of light-refracting surfaces which refract at least some of the light striking said material from the undesired event into the field of view of the first end of said fiber optic means.
Dependencies are inferred from the claim text.