Apparatus to indicate when a patient has evacuated a bed or demo

Details Apparatus to indicate when a patient has evacuated a bed or demo Apparatus to indicate when a patient has evacuated a bed or demo

1977-05-05

1979-12-18

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340575, 340666, G08B 2100

Patent

active

041796926

ABSTRACT:
A switch placed in a bed under a patient, includes contacts which can make or break a connection to a signal processing circuit. The signal processing circuit charges a capacitor at a selected rate, when the switch is in a first state and discharges the capacitor when the switch is in a second state. A latch is set to actuate a signal when the voltage of the capacitor reaches a selected high value. By controlling the rates of charge and discharge of the capacitor it is possible to provide an indication of the degree of restlessness of the patient, the presence of the patient in bed, and whether the patient is out of bed.

REFERENCES:
patent: 3325799 (1967-06-01), Farris
patent: 3926177 (1975-12-01), Hardway, Jr. et al.
patent: 3991414 (1976-11-01), Moran

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