Medical alarm system and methods

• US 5,971,921 A
• Filed: 06/11/1998
• Issued: 10/26/1999
• Est. Priority Date: 06/11/1998
• Status: Expired due to Fees

• Current Assignee: Advanced Monitoring Devices, Inc.
• Original Assignee: Advanced Monitoring Devices, Inc.
• Inventors: Timbel, Ned R.
• Primary Examiner(s): Getzow, Scott M.
• Application Number:
  US09/096,298
• Time in Patent Office: 502 Days
• Field of Search: 600/300, 600/301, 128/904, 128/903, 128/906, 607/60, 607/32
• US Class Current: 600/300
• CPC Class Codes: A61B 5/0022 Monitoring a patient using a global network, e.g. telephone networks, internet
• CPC Class Codes: G08B 25/016 Personal emergency signalling and security systems emergency non-personal manually actuated alarm activators G08B25/12
• CPC Class Codes: Y10S 128/904 Telephone telemetry

Abstract

The invention provides exemplary monitoring systems and methods for their use. In one exemplary method, a person is provided with a transmitter having an actuator. The actuator is operated to transmit a wireless signal of about 900 MHz. The signal from the transmitter is sensed with a receiver/caller unit which sends a digital signal over a telephone line to a monitoring center. This alerts the monitoring center of the actuation of the transmitter. A return signal is sent over the telephone line from the monitoring center to a speaker of the unit to verbally inquiring regarding the actuation of the transmitter.

Claims

1. A monitoring method comprising:

providing a person with a transmitter having an actuator;

operating the actuator to transmit a wireless signal in the range from about 850 MHz to about 950 MHz;

sensing the signal from the transmitter with a receiver/caller unit;

sending a digital signal from the unit over a telephone line to a monitoring center to alert the monitoring center of the actuation of the transmitter; and

sending a return signal over the telephone line from the monitoring center to a speaker of the unit to verbally inquire regarding the actuation of the transmitter.

2. A method as in claim 1, further comprising speaking into the speaker to verbally communicate with the monitoring center.

3. A method as in claim 1, further comprising periodically sending a wireless test signal from the transmitter to the unit to test the charge of a battery in the transmitter.

4. A method as in claim 1, further comprising periodically sending a digital test signal over the telephone line from the unit to the monitoring center.

5. A method as in claim 1, wherein the unit includes a lead acid back-up battery, further comprising periodically recharging the back-up battery with a trickle charge circuit, and further comprising electrically disconnecting the back-up battery from the unit when the voltage of the back-up battery falls below a threshold value.

6. A method as in claim 5, wherein the unit includes an on/off switch having an on position and an off position, and further comprising placing the switch in the off position when shipping the unit to prevent the discharge of power from the back-up battery.

7. A method as in claim 1, wherein the unit includes a programmable circuit board, and further comprising programming the circuit board with telephone numbers for the monitoring center prior to shipping the unit to the person.

8. A method as in claim 1, wherein the unit includes a two-way voice circuit board, further comprising programming the circuit board with two way key codes which indicate a talk mode and a listen mode, and further comprising communicating to the monitoring center the two-way key codes.

9. An alarm system for a user needing medical assistance, the system comprising:

a portable transmitter having a hand actuated actuator, the transmitter producing a wireless signal in the range from about 850 MHz to about 950 MHz upon operation of the actuator;

a receiver/caller unit comprising a receiver to wirelessly receive the signal from the transmitter, circuitry coupled to the receiver to produce and transmit a digital signal that is transmittable over a telephone line to indicate actuation of the transmitter, a speaker to produce audible messages communicated over the telephone line, and a microphone to receive verbal messages which are to be communicated over the telephone line.

10. A system as in claim 9, wherein the unit further includes a lead acid back-up battery.

11. A system as in claim 10, wherein the unit further includes a trickle charge circuit to recharge the battery, and a cut-off circuit to electrically disconnect the back-up battery from the unit when the voltage of the back-up battery falls below a threshold value.

12. A system as in claim 10, wherein the unit further comprises an on/off switch having an on position and an off position, wherein power is prevented from discharging from the battery only when the switch is in the off position.

13. A system as in claim 12, further comprising an electrical power cord which is adapted to couple the unit to a power source.

14. A system as in claim 13, wherein the unit is configured to be operational when the plug is coupled to a power source regardless of the position of the on/off switch.

15. A system as in claim 9, wherein the transmitter is configured to periodically send a test signal to the unit to confirm that the transmitter is operational.

16. A system as in claim 15, wherein the unit produces a warning light if the receiver does not receive the test signal within a predetermined amount of time.

17. A system as in claim 9, wherein the unit further includes a circuit board having a programmable memory device to allow telephone numbers to be programmed into the unit.

18. A system as in claim 17, wherein the programmable memory device is configured to be programmed with two-way key codes which indicate a talk mode and a listen mode.

19. A system as in claim 9, wherein the unit includes a steel housing.

20. A system as in claim 9, wherein the unit includes a light indicator to indicate receipt of the signal from the transmitter.

21. An alarm system for a user needing medical assistance, the system comprising:

a portable transmitter having a hand actuated actuator, the transmitter producing a wireless signal upon operation of the actuator;

a receiver/caller unit comprising a receiver to wirelessly receive the signal from the transmitter, circuitry coupled to the receiver to produce and transmit a digital signal that is transmittable over a telephone line to indicate actuation of the transmitter, a speaker to produce audible messages communicated over the telephone line, and a microphone to receive available messages which are to be communicated over the telephone line, wherein the unit further comprises an on/off switch having an on position and an off position, and an electrical power cord which is adapted to couple the unit to a power source, wherein the unit is configured to be operational when the plug is coupled to a power source regardless of the position of the on/off switch;

wherein the unit includes a battery, and wherein power is prevented from discharging from the battery only when the switch is in the off position; and

wherein the transmitter produces a wireless signal of about 900 MHz upon operation of the actuator.