US3648686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audible psychogalvonometer
Assignee: Individual
•
Filing: 1969-07-03
•
Granted: 1972-03-14
•
Expires: 1989-07-03
Abstract
Abstract A psychogalvonometer includes a pair of electrodes for sampling the galvanic skin response of a subject. The electrodes couple to an amplifier and oscillator circuit which responds to the resistive condition sampled by the electrodes. The oscillator circuit includes a spear which emits an audio signal in response to the electrical signal generated by the oscillator.
Inventors
- 👤 Burlyl R Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:01
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/40; A61B5/4029; A61B5/4035; A61B5/05; A61B5/053; A61B5/0531; A61B5/0533; A61B5/48; A61B5/486; Y; Y10; Y10S; Y10S128/00; Y10S128/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A psychogalvanometer comprising electrodes adapted for connection to a subject, a source of electrical power coupled to the electrodes and arranged to establish a potential difference between the electrodes, means responsive to the current flowing between the electrodes for deriving a signal related to the skin resistance of the subject, a variable frequency oscillator, means responsive to the derived signal for controlling the frequency of the oscillator whereby the oscillator''s frequency is altered by changes in the skin resistance of the subject, and means coupled to the oscillator for indicating changes in the oscillator''s frequency.
Claim 2
Dependent Claim
95 words
A psychogalvanometer comprising electrodes adapted for connection to a subject, a source of electrical power coupled to the electrodes and arranged to establish a potential difference between the electrodes, means responsive to the current flowing between the electrodes for deriving a signal related to the skin resistance of the subject, a variable frequency oscillator, means responsive to the derived signal for controlling the frequency of the oscillator whereby the oscillator''s frequency is altered by changes in the skin resistance of the subject, and means coupled to the oscillator for indicating changes in the oscillator''s frequency.
Claim 3
Dependent Claim
86 words
An audible psychogalvanometer comprising electrodes adapted for connection to a subject, a source of direct current connected to the electrodes, means responsive to the current flow between the electrodes for deriving a signal related to the skin resistance of the subject, a variable frequency audio oscillator, means responsive to the derived signal for controlling the frequency of the audio oscillator whereby the oscillator''s frequency is altered by changes in the skin resistance of the subject, and a speaker connected to the output of the audio oscillator.
Claim 4
Dependent Claim
86 words
An audible psychogalvanometer comprising electrodes adapted for connection to a subject, a source of direct current connected to the electrodes, means responsive to the current flow between the electrodes for deriving a signal related to the skin resistance of the subject, a variable frequency audio oscillator, means responsive to the derived signal for controlling the frequency of the audio oscillator whereby the oscillator''s frequency is altered by changes in the skin resistance of the subject, and a speaker connected to the output of the audio oscillator.
Claim 5
Dependent Claim
59 words
An audible psychogalvanometer according to claim 2, wherein the variable frequency audio oscillator has a feedback capacitor coupling the oscillator''s output to its input, and the means responsive to the derived signal controls the amplitude of the feedback signal fed through the feedback capacitor to the input of the audio oscillator whereby the frequency of the oscillator is controlled.
Claim 6
Dependent Claim
117 words
An audible psychogalvanometer comprising electrodes adapted for connection to a subject, a source of direct current, a resistive network connected to be in series with the electrodes and the source of direct current when the electrodes are attached to a subject, a variable frequency audio oscillator having a feedback capacitor coupled between the input and output of the oscillator, a first transistor connected to the input of the audio oscillator, the first transistor shunting the input of the audio oscillator and being connected to the resistive network to cause the frequency of the audio oscillator to change with a change of potential across the resistive network, and a speaker connected to the output of the audio oscillator.
Claim 7
Dependent Claim
117 words
An audible psychogalvanometer comprising electrodes adapted for connection to a subject, a source of direct current, a resistive network connected to be in series with the electrodes and the source of direct current when the electrodes are attached to a subject, a variable frequency audio oscillator having a feedback capacitor coupled between the input and output of the oscillator, a first transistor connected to the input of the audio oscillator, the first transistor shunting the input of the audio oscillator and being connected to the resistive network to cause the frequency of the audio oscillator to change with a change of potential across the resistive network, and a speaker connected to the output of the audio 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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |