Patent US3742947A successfully refreshed from Google Patents.
US3742947A
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Optically isolated electro-medical device
Assignee: American Optical Corp
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Filing: 1971-08-26
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Granted: 1973-07-03
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Expires: 1991-08-26
Abstract
Abstract An optically isolated electro-medical device. An electronic device is disclosed that is used for monitoring physiological functions of a patient. The device is electrically connected to the patient and establishes electrical isolation from other patient-connected circuitry by optical coupling. The isolation substantially reduces the hazards of electrocuting a hospitalized, bed-ridden patient who may be connected to several different pieces of electro-medical equipment simultaneously. In an illustrative embodiment, the optical coupling includes a light-emitting diode in operative connection with a light-sensing transistor (photo-transistor) and is arranged to minitor the EKG of a patient.
Inventors
- 👤 J Hashem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:24
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H03F3/087; A; A61; A61B; A61B5/00; A61B5/24; A61B5/30; A61B5/301; A61B5/307; A61B5/308; Y; Y10; Y10S; Y10S128/00; Y10S128/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
In improved medical-electronic equipment used for monitoring a physilogical function of a patient, said equipment being capable of simultaneous use with a plurality of other electrical apparatus, said equipment including an electronic amplifier and terminal means for conductively connecting the body of said patient to the input of said amplifier, the improvement comprising: optical coupling means comprising a light-emitting diode in operative connection with a photo-transistor for electrically isolating the output signal of said amplifier from said plurality of other electrical apparatus and for linearly coupling said output signal to at least one of said plurality of other electrical apparatus, first power supply means for supplying power to said equipment, and second power supply means for supplying power in a continuous fashion and without being recharged to both said at least one of said plurality of other appaRatus and said first power supply means and means electrically isolating the power generated from said first power supply means from the power generated from said second power supply means.
Claim 2
Dependent Claim
167 words
In improved medical-electronic equipment used for monitoring a physilogical function of a patient, said equipment being capable of simultaneous use with a plurality of other electrical apparatus, said equipment including an electronic amplifier and terminal means for conductively connecting the body of said patient to the input of said amplifier, the improvement comprising: optical coupling means comprising a light-emitting diode in operative connection with a photo-transistor for electrically isolating the output signal of said amplifier from said plurality of other electrical apparatus and for linearly coupling said output signal to at least one of said plurality of other electrical apparatus, first power supply means for supplying power to said equipment, and second power supply means for supplying power in a continuous fashion and without being recharged to both said at least one of said plurality of other appaRatus and said first power supply means and means electrically isolating the power generated from said first power supply means from the power generated from said second power supply means.
References Cited (Backward Citations)
US3488586A
Cited
US3598909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |