AC electric energy meter having shielded radiation responsive data interface
First Claim
1. Electric power distribution apparatus, comprising:
- a fixed data processing component coupled to an electric utility power distribution circuit for processing data related to said circuit, said fixed component comprising radiation responsive input means for receiving external data transmitted to said fixed component;
a cover attached to said fixed component, said cover providing protection for said fixed component while permitting transmission of radiation therethrough;
a portable data processing component for generating radiation modulated with data to be transmitted to said fixed component; and
shutter means attached to said fixed component interiorly of said cover for preventing radiation transmitted through said cover from reaching said input means, said shutter means comprising means responsive to magnetic flux for selectively permitting transmission of radiation through said cover to said input means.
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Accused Products
Abstract
A watt-hour metering system includes a meter enclosed in a transparent cover and having an electronic register with a multichannel infra-red responsive data I/O port, and a portable electronic programmer/reader having a complementary infra-red data I/O port. The meter includes a pivoting shutter inside the cover having a pair of magnets affixed thereto and held by gravity in a position to shield at least one channel of the I/O port from radiation entering the cover. An activating magnet is affixed to the programmer/reader such that when the programmer/reader is placed against the meter cover, magnetic flux is coupled to the shutter magnets to cause the shutter to pivot and permit the transmission of infra-red radiation between the I/O port and the programmer/reader. Alternatively, a shutter is pivotally secured to the cover and manually operable from outside the cover to selectively permit and prevent transmission of radiation between the I/O port and programmer/reader.
20 Citations
18 Claims
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1. Electric power distribution apparatus, comprising:
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a fixed data processing component coupled to an electric utility power distribution circuit for processing data related to said circuit, said fixed component comprising radiation responsive input means for receiving external data transmitted to said fixed component; a cover attached to said fixed component, said cover providing protection for said fixed component while permitting transmission of radiation therethrough; a portable data processing component for generating radiation modulated with data to be transmitted to said fixed component; and shutter means attached to said fixed component interiorly of said cover for preventing radiation transmitted through said cover from reaching said input means, said shutter means comprising means responsive to magnetic flux for selectively permitting transmission of radiation through said cover to said input means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification