Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-06-09
2000-02-15
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
200600, 307116, 307125, 3405681, 340666, G08B 2100
Patent
active
060257822
ABSTRACT:
A capacitive array is housed within a polyester mat or other appropriate nonconductive substrate material which is interconnected with a control module. The control module supplies to the capacitive array a suitable oscillator driver current and concurrently senses capacitance value changes within the capacitive array induced through dielectric shifts within the array brought about by the proximity or absence thereof of the patient's body mass. The control module consists of a power supply, a driver/sensor circuit, a calibration/comparator logic circuit, a system interconnection integrity circuit, and an alarm generation circuit. It may also optionally contain a nurse call relay circuit for interconnection to a facility's nurse call system.
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