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Patent US6084513A successfully refreshed from Google Patents.
US6084513A
Expired / Lapsed
US
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Method and apparatus for tracking a patient
Assignee: Innovative Control Systems Inc
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Filing: 1997-09-26
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Granted: 2000-07-04
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Expires: 2017-09-26
Abstract
Abstract A system for monitoring a person in a secured zone is disclosed. One or more transmitters transmit a first signal into the zone. The person wears a tag that receives the first signal. The tag transmits a second signal that is responsive to the first signal. A receiver receives the second signal and provides a third signal responsive to the first signal. A controller is connected to the receiver and includes a discrimination circuit that determines if the third signal is responsive to the first signal. The controller provides an alarm signal if responsiveness is found. The responsiveness may be a constant phase relationship, and data may be transmitted by the tag at a frequency derived from the first frequency. A three loop antenna, with each loop disposed in a unique plane is described. Each unique plane is substantially perpendicular to the other unique planes, in another embodiment. The tag includes a band removal circuit that senses the skin resistivity of the patient in another embodiment. The tag may also include a chest band that senses the respiration of the patient. The tag includes a power circuit that reduces power consumption in the event the second signal is not being transmitted.
Inventors
- 👤 James Stoffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:31
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/02; G08B21/0202; G08B21/0205; G08B21/0211; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2414; G08B13/2417; G08B13/2428; G08B13/2431; G08B13/2448; G08B13/2451; G08B13/2454; G08B13/2462; G08B13/2465; G08B13/2468; G08B13/2477; G08B13/2488; G08B21/0227; G08B21/023; G08B21/0286; G08B21/18; G08B21/22
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
125 words
A system for monitoring a person in a secured zone comprising: at least one transmitter mounted to transmit a first signal into the zone; at least one tag to be worn on the person, wherein the tag includes a receiver that receives the first signal, and a tag transmitter that transmits a second signal, wherein the second signal is responsive to, and at a fixed phase with respect to the first signal; a receiver disposed to receive the second signal and provide a third signal responsive to the first signal; and a controller connected to the receiver, wherein the controller includes a discrimination circuit that determines if the third signal is responsive to the first signal and provides an alarm signal if responsiveness is found.
Claim 2
Independent Claim
125 words
A system for monitoring a person in a secured zone comprising: at least one transmitter mounted to transmit a first signal into the zone; at least one tag to be worn on the person, wherein the tag includes a receiver that receives the first signal, and a tag transmitter that transmits a second signal, wherein the second signal is responsive to, and at a fixed phase with respect to the first signal; a receiver disposed to receive the second signal and provide a third signal responsive to the first signal; and a controller connected to the receiver, wherein the controller includes a discrimination circuit that determines if the third signal is responsive to the first signal and provides an alarm signal if responsiveness is found.
Claim 3
Dependent Claim
28 words
The system of claim 1 wherein the controller includes a phase discrimination circuit that determines if the third signal has a fixed phase relationship with the first signal.
Claim 4
Dependent Claim
18 words
The system of claim 1 wherein the transmitter is a transmitter that transmits at a first fixed frequency.
Claim 5
Dependent Claim
18 words
The system of claim 3 wherein the first fixed frequency is one of a plurality of selectable frequencies.
Claim 6
Dependent Claim
34 words
The system of claim 3 wherein the tag transmitter is a transmitter that transmits at a second fixed carrier frequency and a data frequency, wherein the data frequency is responsive to the first frequency.
Claim 7
Dependent Claim
42 words
The system of claim 1 further including an antenna connected to the transmitter, wherein the antenna includes a plurality of loops, and each loop is disposed in a unique plane, and each unique plane is substantially perpendicular to the other unique planes.
Claim 8
Dependent Claim
21 words
The system of claim 1 wherein the tag includes a tag removal circuit that senses the skin resistivity of the person.
Claim 9
Dependent Claim
19 words
The system of claim 1 wherein the tag includes a chest band and senses the respiration of the person.
Claim 10
Dependent Claim
26 words
The system of claim 1 wherein the tag includes a power circuit that reduces power consumption in the event the second signal is not being transmitted.
Claim 11
Independent Claim
132 words
A system for monitoring a person in a secured zone comprising: at least one transmitter means for transmitting a first signal into the zone; at least one tag to be worn on the person, wherein the tag includes a receiver means for receiving the first signal, and a tag transmitter means for transmitting a second signal into the zone, wherein the second signal is responsive to, and at a fixed phase with respect to, the first signal; a receiver means for receiving the second signal and providing a third signal responsive to the first signal; and a controller connected to the receiver means, wherein the controller includes a discrimination means for determining if the third signal is responsive to the first signal and for providing an alarm signal if responsiveness is found.
Claim 12
Independent Claim
132 words
A system for monitoring a person in a secured zone comprising: at least one transmitter means for transmitting a first signal into the zone; at least one tag to be worn on the person, wherein the tag includes a receiver means for receiving the first signal, and a tag transmitter means for transmitting a second signal into the zone, wherein the second signal is responsive to, and at a fixed phase with respect to, the first signal; a receiver means for receiving the second signal and providing a third signal responsive to the first signal; and a controller connected to the receiver means, wherein the controller includes a discrimination means for determining if the third signal is responsive to the first signal and for providing an alarm signal if responsiveness is found.
Claim 13
Dependent Claim
28 words
The system of claim 10 wherein the controller includes a phase discrimination means for determining if the third signal has a fixed phase relationship with the first signal.
Claim 14
Dependent Claim
18 words
The system of claim 10 wherein the transmitter means includes means for transmitting at a first fixed frequency.
Claim 15
Dependent Claim
34 words
The system of claim 12 wherein the tag transmitter means includes means for transmitting at a second fixed carrier frequency and a data frequency, wherein the data frequency is responsive to the first frequency.
Claim 16
Dependent Claim
42 words
The system of claim 10 further including an antenna connected to the transmitter, wherein the antenna includes a plurality of loops, and each loop is disposed in a unique plane, and each unique plane is substantially perpendicular to the other unique planes.
Claim 17
Dependent Claim
20 words
The system of claim 10 wherein the tag includes a tag removal means for determinign if the tag is removed.
Claim 18
Dependent Claim
18 words
The system of claim 10 wherein the tag includes a means for sensing the respiration of the person.
Claim 19
Dependent Claim
27 words
The system of claim 10 wherein the tag includes a power circuit means for reducing power consumption in the event the second signal is not being transmitted.
Claim 20
Independent Claim
91 words
A method for monitoring a person wearing a tag in a secured zone comprising the steps of: transmitting a first signal into the zone; receiving the first signal at the tag; transmitting a second signal from the tag, wherein the second signal is responsive to, and at a fixed phase with respect to, the first signal; receiving the second signal and providing a third signal responsive to the first signal; and determining if the third signal is responsive to the first signal and providing an alarm signal if responsiveness is found.
Claim 21
Independent Claim
91 words
A method for monitoring a person wearing a tag in a secured zone comprising the steps of: transmitting a first signal into the zone; receiving the first signal at the tag; transmitting a second signal from the tag, wherein the second signal is responsive to, and at a fixed phase with respect to, the first signal; receiving the second signal and providing a third signal responsive to the first signal; and determining if the third signal is responsive to the first signal and providing an alarm signal if responsiveness is found.
Claim 22
Dependent Claim
23 words
The method of claim 18 including the step of determining if the third signal has a fixed phase relationship with the first signal.
Claim 23
Dependent Claim
18 words
The method of claim 18 including the step of transmitting the first signal at a first fixed frequency.
Claim 24
Dependent Claim
33 words
The method of claim 20 including the step of transmitting the second signal at a second fixed carrier frequency and a data frequency, wherein the data frequency is responsive to the first frequency.
Claim 25
Dependent Claim
15 words
The method of claim 18 including the step of senses when the tag is removed.
Claim 26
Dependent Claim
15 words
The method of claim 18 including the step of sensing the respiration of the person.
Claim 27
Dependent Claim
22 words
The method of claim 18 including the step of reducing power consumption in the event the second signal is not being transmitted.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-07-04 | 2004-01-03 | 2004-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-04 | 2008-01-03 | 2008-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-04 | 2012-01-03 | 2012-07-04 | $7700.00 | Window Closed / Lapsed |