Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-01-07
2000-12-05
Tong, Nina
Communications: electrical
Condition responsive indicating system
Specific condition
3406861, 34087002, 3242072, 25023111, 356375, G08B 2100
Patent
active
061573116
ABSTRACT:
A portable, compact, freestanding sensor housing is configured to be stably and removably affixed relative to a metering device having a movable indicator element. The housing includes a transmitter for emitting electro-magnetic radiation and a receiver for receiving electro-magnetic radiation. The transmitter and the receiver are positioned to define a reflective region within which an object will reflect electro-magnetic radiation emitted from the transmitter toward the receiver. A signal generator, in communication with the receiver, generates a signal indicating that the movable indicator element is located within the reflective region. A sensor warning device affixed relative to the metering device will thereby generate a signal when the movable indicator element is located within the reflective region.
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