US3845773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardiac stimulators
Assignee: TEMCO NATIONAL CORP A Corp OF
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Filing: 1972-07-07
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Granted: 1974-11-05
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Expires: 1992-07-07
Abstract
Abstract Cardiac stimulator comprising a conductor system in contact with the muscle to be stimulated, connected to a source of electrical impulses, in which said source comprises means of producing a first impulse signal of a frequency half of that of the cardiac rate to be stimulated, and a second impulse signal of the same frequency as the first but out of phase with it by half a period. In one embodiment, separate sources of electrical energy are connected to two signal generators. A delay line between the generators insures that the signal present on one generator output line is out of phase with the signal present on the other generator output line. In one version, the output lines are connected to a single electrode whereas in another version, the output lines are connected to separate electrodes. In another embodiment, a single source of electrical energy is connected to a generator having an output signal which is interrupted and directed first to one electrode and then to a second electrode.
Inventors
- 👤 G Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A cardiac stimulator for a muscle comprising: a single source of electrical energy; a single generator connected to said source operable to produce electRical impulses of a frequency equal to the cardiac rate to be stimulated; a pair of electrodes adapted to be in contact with the muscle to be stimulated; switching means connected to said electrodes and to said single generator operable to send said impulses alternatively to each of said electrodes; and, resistive means connected between said switching means and one electrode of said pair of electrodes to reduce amplitude of an impulse on said one electrode while not changing said frequency.
Claim 2
Dependent Claim
104 words
A cardiac stimulator for a muscle comprising: a single source of electrical energy; a single generator connected to said source operable to produce electRical impulses of a frequency equal to the cardiac rate to be stimulated; a pair of electrodes adapted to be in contact with the muscle to be stimulated; switching means connected to said electrodes and to said single generator operable to send said impulses alternatively to each of said electrodes; and, resistive means connected between said switching means and one electrode of said pair of electrodes to reduce amplitude of an impulse on said one electrode while not changing said frequency.
Claim 3
Dependent Claim
164 words
A cardiac stimulator for a muscle comprising: a first source of electrical energy; a second source of electrical energy independent of said first source; a first impulse generator connected to said first source, said generator having a first impulse signal of a frequency half of that of the cardiac rate to be stimulated; a second impulse generator connected to said second source, said second generator having a second impulse signal equal in frequency to said first impulse signal; delay means connected to and between said first impulse generator and said second impulse generator and operable to cause said second impulse signal to be out of phase with said first impulse signal by half a period of said cardiac rate; a pair of conductors connected to said first impulse generator and said second impulse generator to receive said first impulse signal and said second impulse signal; and, an electrode connected to said conductors and adapted to be in contact with the muscle to be stimulated.
Claim 4
Dependent Claim
164 words
A cardiac stimulator for a muscle comprising: a first source of electrical energy; a second source of electrical energy independent of said first source; a first impulse generator connected to said first source, said generator having a first impulse signal of a frequency half of that of the cardiac rate to be stimulated; a second impulse generator connected to said second source, said second generator having a second impulse signal equal in frequency to said first impulse signal; delay means connected to and between said first impulse generator and said second impulse generator and operable to cause said second impulse signal to be out of phase with said first impulse signal by half a period of said cardiac rate; a pair of conductors connected to said first impulse generator and said second impulse generator to receive said first impulse signal and said second impulse signal; and, an electrode connected to said conductors and adapted to be in contact with the muscle to be stimulated.
Claim 5
Dependent Claim
160 words
A cardiac stimulator for a muscle comprising: a first source of electrical energy; a second source of electrical energy independent of said first source; a first impulse generator connected to said first source, said generator having a first impulse signal of a frequency half of that of the cardiac rate to be stimulated; a second impulse generator connected to said second source, said second generator having a second impulse signal equal in frequency to said first impulse signal; a trigger means connected to and between said first impulse generator and said second impulse generator being operable to cause said second impulse signal to be out of phase with said first impulse signal by half a period of said cardiac rate; a pair of electrodes adapted to be in contact with the muscle to be stimulated with said electrodes connected to said first impulse generator and said second impulse generator to receive said first impulse signal and said second impulse signal.
Claim 6
Dependent Claim
160 words
A cardiac stimulator for a muscle comprising: a first source of electrical energy; a second source of electrical energy independent of said first source; a first impulse generator connected to said first source, said generator having a first impulse signal of a frequency half of that of the cardiac rate to be stimulated; a second impulse generator connected to said second source, said second generator having a second impulse signal equal in frequency to said first impulse signal; a trigger means connected to and between said first impulse generator and said second impulse generator being operable to cause said second impulse signal to be out of phase with said first impulse signal by half a period of said cardiac rate; a pair of electrodes adapted to be in contact with the muscle to be stimulated with said electrodes connected to said first impulse generator and said second impulse generator to receive said first impulse signal and said second impulse signal.
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |