US3653387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protector circuit for cardiac apparatus
Assignee: CARDIAC ELECTRONICS Inc
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Filing: 1970-05-08
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Granted: 1972-04-04
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Expires: 1990-05-08
Abstract
Abstract A protector circuit having relay arrangement and gas discharge tubes coupled between first electrodes attached to a patient and the amplifier of an electrocardiograph, the relays comprising fast acting reed relays which break the circuit when a defibrillator is energized to apply a countershock voltage across second electrodes mounted on said patient, to prevent the countershock voltage from distorting the heartbeat waveform produced by the electrocardiograph. The gas discharge tubes prevent voltages in excess of a predetermined value from reaching the amplifier by conducting such voltages to ground, whether the relays are opened or closed.
Inventors
- 👤 Richard R Ceier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:46
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3925; A61N1/3931; A61B; A61B5/00; A61B5/24; A61B5/30; A61B5/304; A61B5/307; A61B5/308; A61N1/3906; A61N1/3912
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
277 words
An electrocardiograph circuit comprising electrode means adapted to be coupled to a patient for detecting a heartbeat, heartbeat signal amplifier means, display means for providing a visual indication of said patient''s heartbeat, circuit means coupling said electrode means and said heartbeat signal amplifier means and said display means, circuit protector means in said circuit means coupled between said electrode means and said heartbeat signal amplifier means for effectively disconnecting said electrode means from said heartbeat signal amplifier means for selectively preventing distortion producing voltages from being conducted to said heartbeat signal amplifier means and thereby preventing distortions in said heartbeat signal amplifier means which can result in a distorted representation on said display means, said circuit protector means including relay means, defibrillator circuit means, switch means in said defibrillator circuit means for selectively energizing said defibrillator circuit means to apply a countershock voltage to a patient, second circuit means coupling said defibrillator circuit means to said circuit protector means and energizable incidental to the energization of said defibrillator circuit means for causing said circuit protector means to prevent distortion producing voltages produced incidental to defibrillation from being conducted to said heartbeat signal amplifier means, and third circuit means having voltage discharge means therein coupled between said electrode means and said relay means for conducting voltages in excess of a predetermined value applied to said electrode means away from said relay means and said heartbeat signal amplifier means, said relay means comprising fast acting reed relay means in said circuit means for opening said circuit means between said electrode means and said heartbeat signal amplifier means before said defibrillator circuit means apply said countershock voltage to said patient.
Claim 2
Dependent Claim
277 words
An electrocardiograph circuit comprising electrode means adapted to be coupled to a patient for detecting a heartbeat, heartbeat signal amplifier means, display means for providing a visual indication of said patient''s heartbeat, circuit means coupling said electrode means and said heartbeat signal amplifier means and said display means, circuit protector means in said circuit means coupled between said electrode means and said heartbeat signal amplifier means for effectively disconnecting said electrode means from said heartbeat signal amplifier means for selectively preventing distortion producing voltages from being conducted to said heartbeat signal amplifier means and thereby preventing distortions in said heartbeat signal amplifier means which can result in a distorted representation on said display means, said circuit protector means including relay means, defibrillator circuit means, switch means in said defibrillator circuit means for selectively energizing said defibrillator circuit means to apply a countershock voltage to a patient, second circuit means coupling said defibrillator circuit means to said circuit protector means and energizable incidental to the energization of said defibrillator circuit means for causing said circuit protector means to prevent distortion producing voltages produced incidental to defibrillation from being conducted to said heartbeat signal amplifier means, and third circuit means having voltage discharge means therein coupled between said electrode means and said relay means for conducting voltages in excess of a predetermined value applied to said electrode means away from said relay means and said heartbeat signal amplifier means, said relay means comprising fast acting reed relay means in said circuit means for opening said circuit means between said electrode means and said heartbeat signal amplifier means before said defibrillator circuit means apply said countershock voltage to said patient.
Claim 3
Dependent Claim
357 words
An electrocardiograph circuit comprising electrode means adapted to be coupled to a patient for detecting a heartbeat, heartbeat signal amplifier means in said electrocardiograph circuit for amplifying a heartbeat signal picked up by said electrode means, display means for providing a visual indication of said patient''s heartbeat, first circuit means coupling said electrode means and said heartbeat signal amplifier means, second circuit means coupling said amplifier means and said display means, circuit protector means in said first circuit means coupled between said electrode means and said heartbeat signal amplifier means with said electrode means being in immediate preceding relationship to said circuit protector means which in turn are in immediate preceding relationship to said heartbeat amplifier means, said circuit protector means effectively disconnecting said electrode means from said heartbeat signal amplifier means for preventing distortion producing voltages from being conducted to any portion of said heartbeat signal amplifier means and thereby preventing distortions in said heartbeat signal amplifier means which can result in a distorted representation on said display means, said circuit protector means including relay means for disconnecting said electrode means from said heartbeat signal amplifier means, defibrillator circuit means, switch means in said defibrillator circuit means for selectively energizing said defibrillator circuit means to apply a countershock voltage to a patient, third circuit means coupling said defibrillator circuit means to said circuit protector means and energizable incidental to the energization of said defibrillator circuit means for causing said circuit protector means to prevent distortion prOducing voltages produced incidental to defibrillation from being conducted to said heartbeat signal amplifier means, means for causing said circuit protector means to automatically reconnect said electrode means to said heartbeat signal amplifier means after said switch means is released after the termination of said countershock voltage to cause said display means to provide said visual indication of said patient''s heartbeat immediately after the termination of said countershock voltage, said relay means comprising fast acting reed relay means in said first circuit means for opening said first circuit means between said electrode means and said heartbeat signal amplifier means before said defibrillator circuit means apply said countershock voltage to said patient.
Claim 4
Dependent Claim
357 words
An electrocardiograph circuit comprising electrode means adapted to be coupled to a patient for detecting a heartbeat, heartbeat signal amplifier means in said electrocardiograph circuit for amplifying a heartbeat signal picked up by said electrode means, display means for providing a visual indication of said patient''s heartbeat, first circuit means coupling said electrode means and said heartbeat signal amplifier means, second circuit means coupling said amplifier means and said display means, circuit protector means in said first circuit means coupled between said electrode means and said heartbeat signal amplifier means with said electrode means being in immediate preceding relationship to said circuit protector means which in turn are in immediate preceding relationship to said heartbeat amplifier means, said circuit protector means effectively disconnecting said electrode means from said heartbeat signal amplifier means for preventing distortion producing voltages from being conducted to any portion of said heartbeat signal amplifier means and thereby preventing distortions in said heartbeat signal amplifier means which can result in a distorted representation on said display means, said circuit protector means including relay means for disconnecting said electrode means from said heartbeat signal amplifier means, defibrillator circuit means, switch means in said defibrillator circuit means for selectively energizing said defibrillator circuit means to apply a countershock voltage to a patient, third circuit means coupling said defibrillator circuit means to said circuit protector means and energizable incidental to the energization of said defibrillator circuit means for causing said circuit protector means to prevent distortion prOducing voltages produced incidental to defibrillation from being conducted to said heartbeat signal amplifier means, means for causing said circuit protector means to automatically reconnect said electrode means to said heartbeat signal amplifier means after said switch means is released after the termination of said countershock voltage to cause said display means to provide said visual indication of said patient''s heartbeat immediately after the termination of said countershock voltage, said relay means comprising fast acting reed relay means in said first circuit means for opening said first circuit means between said electrode means and said heartbeat signal amplifier means before said defibrillator circuit means apply said countershock voltage to said patient.
Claim 5
Dependent Claim
400 words
An electrocardiograph circuit comprising electrode means adapted to be coupled to a patient for detecting a heartbeat, heartbeat signal amplifier means in said electrocardiograph circuit for amplifying a heartbeat signal picked up by said electrode means, display means for providing a visual indication of said patient''s heartbeat, first circuit means coupling said electrode means and said heartbeat signal amplifier means, second circuit means coupling said amplifier means and said display means, circuit protector means in said first circuit means coupled between said electrode means and said heartbeat signal amplifier means with said electrode means being in immediate preceding relationship to said circuit protector means which in turn are in immediate preceding relationship to said heartbeat amplifier means, said circuit protector means effectively disconnecting said electrode means from said heartbeat signal amplifier means for preventing distortion producing voltages from being conducted to any portion of said heartbeat signal amplifier means and thereby preventing distortions in said heartbeat signal amplifier means which can result in a distorted representation on said display means, said circuit protector means including relay means for disconnecting said electrode means from said heartbeat signal amplifier means, defibrillator circuit means, switch means in said defibrillator circuit means for selectively energizing said defibrillator circuit means to apply a countershock voltage to a patient, third circuit means coupling said defibrillator circuit means to said circuit protector means and energizable incidental to the energization of said defibrillator circuit means for causing said circuit protector means to prevent distortion producing voltages produced incidental to defibrillation from being conducted to said heartbeat signal amplifier means, and a fourth circuit means having voltage discharge means therein coupled between said electrode means and said relay means for conducting voltages in excess of a predetermined value applied to said electrode means away from said relay means and said heartbeat signal amplifier means, means for causing said circuit protector means to automatically reconnect said electrode means to said heartbeat signal amplifier means after said switch means is released after the termination of said countershock voltage to cause said display means to provide said visual indication of said patient''s heartbeat immediately after the termination of said countershock voltage, said relay means comprising fast acting reed relay means in said first circuit means for opening said circuit means between said electrode means and said heartbeat signal amplifier means before said defibrillator circuit means apply said countershock voltage to said patient.
Claim 6
Dependent Claim
400 words
An electrocardiograph circuit comprising electrode means adapted to be coupled to a patient for detecting a heartbeat, heartbeat signal amplifier means in said electrocardiograph circuit for amplifying a heartbeat signal picked up by said electrode means, display means for providing a visual indication of said patient''s heartbeat, first circuit means coupling said electrode means and said heartbeat signal amplifier means, second circuit means coupling said amplifier means and said display means, circuit protector means in said first circuit means coupled between said electrode means and said heartbeat signal amplifier means with said electrode means being in immediate preceding relationship to said circuit protector means which in turn are in immediate preceding relationship to said heartbeat amplifier means, said circuit protector means effectively disconnecting said electrode means from said heartbeat signal amplifier means for preventing distortion producing voltages from being conducted to any portion of said heartbeat signal amplifier means and thereby preventing distortions in said heartbeat signal amplifier means which can result in a distorted representation on said display means, said circuit protector means including relay means for disconnecting said electrode means from said heartbeat signal amplifier means, defibrillator circuit means, switch means in said defibrillator circuit means for selectively energizing said defibrillator circuit means to apply a countershock voltage to a patient, third circuit means coupling said defibrillator circuit means to said circuit protector means and energizable incidental to the energization of said defibrillator circuit means for causing said circuit protector means to prevent distortion producing voltages produced incidental to defibrillation from being conducted to said heartbeat signal amplifier means, and a fourth circuit means having voltage discharge means therein coupled between said electrode means and said relay means for conducting voltages in excess of a predetermined value applied to said electrode means away from said relay means and said heartbeat signal amplifier means, means for causing said circuit protector means to automatically reconnect said electrode means to said heartbeat signal amplifier means after said switch means is released after the termination of said countershock voltage to cause said display means to provide said visual indication of said patient''s heartbeat immediately after the termination of said countershock voltage, said relay means comprising fast acting reed relay means in said first circuit means for opening said circuit means between said electrode means and said heartbeat signal amplifier means before said defibrillator circuit means apply said countershock voltage to said patient.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |