US3794022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual oscillator, variable pulse duration electrotherapeutic device
Assignee: Individual
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Filing: 1972-06-30
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Granted: 1974-02-26
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Expires: 1992-06-30
Abstract
Abstract A first multi-vibrator produces square wave pulses of constant voltage for a 15 second period with a three second ''''off'''' interval in between each pulse. The 15 second pulses are converted into ramp pulses of the same period and interval. The ramp pulses are used to control a second multivibrator which produces a series of constant voltage square wave pulses during the 15 second period. Each succeeding square wave pulse during the 15 second period is of a slightly longer duration so that there is a constant increase in the time duration of the square wave pulses during each 15 second period. The cycle is repeated after the 3 second ''''off'''' interval between the 15 second pulse periods. The varying square wave pulses are used to trigger separate 4KHZ and 6KHZ voltage oscillators. Each oscillator produces output pulses at their respective frequencies of the same duration and interval as the square wave inputs. The frequency pulses are amplified by separate amplifiers and the amplified pulses are applied by a body probe to the patient. Zener diodes are provided at the output of each amplifiers to limit the maximum possible voltage that may be applied to the patient.
Inventors
- 👤 H Greit
- 👤 E Nawracaj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:20
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/323; A61N1/36; A61N1/36014; A61N1/3603
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
271 words
An electrotherapeutic device for applying therapeutic electrical currents to the body of a patient comprising: first multi-vibrator means for producing a multiplicity of constant voltage signals of a predetermined time period, each of said multiplicity of voltage signals being separated by a predetermined time interval; integrator means for receiving and converting each of said multiplicity of constant voltage signals into a corresponding ramp pulse having an increasing voltage magnitude during the predetermined period; second multi-vibrator means for receiving and converting each of said ramp pulses into a multIplicity of separate square wave voltage pulses, the time duration of each of said square wave voltage pulses increasing proportionately during said predetermined period; control means for controlling the magnitude of said square wave voltage pulses; first oscillator means for receiving said square wave voltage pulses and converting said square wave voltage pulses into first oscillating voltage pulses having a first frequency, said first oscillating voltage pulses having the same proportionally increasing time duration as said square wave voltage pulses; second oscillator means for receiving said square wave voltage pulses and converting said square voltage pulses into second oscillating voltage pulses having a second frequency, said second oscillating voltage pulses having the same proportionally increasing time duration as said square wave voltage pulses, first amplifier means for receiving and amplifying said first oscillating voltage pulses, second amplifier means for receiving amd amplifying said second oscillating voltage pulses; probe means for receiving said amplified first and said second oscillating voltage pulses from the first and second amplifying means respectively and applying said first and second amplified oscillating voltage pulses to the body of the patient.
Claim 2
Dependent Claim
271 words
An electrotherapeutic device for applying therapeutic electrical currents to the body of a patient comprising: first multi-vibrator means for producing a multiplicity of constant voltage signals of a predetermined time period, each of said multiplicity of voltage signals being separated by a predetermined time interval; integrator means for receiving and converting each of said multiplicity of constant voltage signals into a corresponding ramp pulse having an increasing voltage magnitude during the predetermined period; second multi-vibrator means for receiving and converting each of said ramp pulses into a multIplicity of separate square wave voltage pulses, the time duration of each of said square wave voltage pulses increasing proportionately during said predetermined period; control means for controlling the magnitude of said square wave voltage pulses; first oscillator means for receiving said square wave voltage pulses and converting said square wave voltage pulses into first oscillating voltage pulses having a first frequency, said first oscillating voltage pulses having the same proportionally increasing time duration as said square wave voltage pulses; second oscillator means for receiving said square wave voltage pulses and converting said square voltage pulses into second oscillating voltage pulses having a second frequency, said second oscillating voltage pulses having the same proportionally increasing time duration as said square wave voltage pulses, first amplifier means for receiving and amplifying said first oscillating voltage pulses, second amplifier means for receiving amd amplifying said second oscillating voltage pulses; probe means for receiving said amplified first and said second oscillating voltage pulses from the first and second amplifying means respectively and applying said first and second amplified oscillating voltage pulses to the body of the patient.
Claim 3
Dependent Claim
40 words
An electrotherapeutic device as claimed in claim 1 further comprising voltage sensitive means connected to said first and second amplifier means for preventing the magnitude of the amplified first and second oscillating voltage pulses from exceeding a predetermined maximum voltage.
Claim 4
Dependent Claim
28 words
An electrotherapeutic device as claimed in claim 1 further comprising visual indicating means to visually indicate the magnitude of the oscillating voltage pulses applied to the probe means.
Claim 5
Dependent Claim
44 words
An electrotherapeutic device as claimed in claim 1 further comprising audio monitor means connected to said first and second oscillator means, said audio means for reproducing audible perceptible pulses of a frequency corresponding to the frequency of said first and second oscillating voltage pulses.
Claim 6
Dependent Claim
77 words
An electrotherapeutic device as claimed in claim 1 wherein said probe means comprises: a first pair of body contacts connected to said first amplifier means for receiving said first oscillating voltage pulses and applying said first oscillating voltage pulses to the body of the patient; a second pair of body contacts connected to said second amplifier means for receiving said second oscillating voltage pulses and applying said second oscillating voltage pulses to the body of the patient.
Claim 7
Dependent Claim
41 words
An electrotherapeutic device as claimed in claim 2 wherein said voltage sensitive means comprises a first Zener diode connected from said first amplifier means to a ground; and a second Zener diode connected from said second amplifier means to a ground.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |