US4124030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-therapeutic faradic current generator
Assignee: Individual
•
Filing: 1977-01-05
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Granted: 1978-11-07
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Expires: 1997-01-05
Abstract
Abstract Therapeutic faradic current generators are used for stimulation of muscles and nerves of a body. Disclosed is such a generator in one embodiment having a unijunction transistor relaxation oscillator that feeds a Schmitt trigger, the output of which gates a power oscillator. The power oscillator drives a pair of electrodes that are put in contact with the skin.
Inventors
- 👤 Wallace A. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:27
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/323; A61N1/36; A61N1/36014; A61N1/3603; A61N1/36034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A faradic current generator, comprising a single transistor relaxation oscillator having an adjustable firing rate; a pair of transistors connected to operate as a Schmitt trigger, with two opposite-phased outputs and interconnected emitters, and to receive, at the interconnection of the emitters, the oscillator's output; a single transistor buffer amplifier, having its input connected to one end of the Schmitt trigger outputs; a second single transistor amplifier, having its input connected to the other one of the Schmitt trigger outputs, and having a light-emitting diode in the output thereof; a power oscillator, having two transistors connected in a push-pull configuration, and connected to the output of the buffer amplifier in such a way that a pulse from the buffer amplifier triggers an alternating current burst in the output of the power oscillator for approximately the duration of the pulse; and means for connecting electrodes to the output of the power oscillator.
Claim 2
Dependent Claim
151 words
A faradic current generator, comprising a single transistor relaxation oscillator having an adjustable firing rate; a pair of transistors connected to operate as a Schmitt trigger, with two opposite-phased outputs and interconnected emitters, and to receive, at the interconnection of the emitters, the oscillator's output; a single transistor buffer amplifier, having its input connected to one end of the Schmitt trigger outputs; a second single transistor amplifier, having its input connected to the other one of the Schmitt trigger outputs, and having a light-emitting diode in the output thereof; a power oscillator, having two transistors connected in a push-pull configuration, and connected to the output of the buffer amplifier in such a way that a pulse from the buffer amplifier triggers an alternating current burst in the output of the power oscillator for approximately the duration of the pulse; and means for connecting electrodes to the output of the power oscillator.
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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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |