Electricity: circuit makers and breakers – Weight
Patent
1996-08-15
1998-07-14
Tolin, Gerald P.
Electricity: circuit makers and breakers
Weight
128782, 340573, 340666, H01H 302
Patent
active
057807981
ABSTRACT:
A sensing unit to be positioned between the matress of a bed and the bed frame for monitoring an occupant of the bed, the sensor consisting of thinly spaced upper and lower steel plates between which is located a point sensor such as a Hall effect transducer or a reed switch. The upper plate flexes in response to the weight of an occupant above. The sensing unit is to be attached to a control unit which generates an audible and visible alarm signal when the occupant leaves the bed. In a different embodiment, sensors are located in the bed frame to monitor the occupant of the bed.
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Medical Biological Engineering: Journal of the International federation for medical and biological engineering: vol. 8, No. 5, Sep. 1970, Stevenage (GB) A.H. Crisp et al. "The Design of a Motility Bed Including its Calibration for the Subject's Weight" pp. 456-458; Figures 1-3.
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