AC electric energy meter having shielded radiation responsive data interface
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Apr 22, 1986
Grant Date -
N/A
app pub date -
Mar 25, 1983
filing date -
Mar 25, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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