Apparatus to indicate when a patient has evacuated a bed or demonstrates a restless condition
Patent 4179692 Issued on December 18, 1979. Estimated Expiration Date: 
May 5, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 5, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 05/794041 filed on 05/05/1977US Classes:340/573.1, Human or animal340/573.4, House arrest system, wandering, or wrong place340/575, Sleep340/666WeightExaminersPrimary: Swann, III, Glen R.Attorney, Agent or FirmInternational ClassesA61B 5/11 (20060101)G08B 21/00 (20060101) G08B 21/22 (20060101) AbstractA 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. | |
