Patent US3563231A successfully refreshed from Google Patents.
US3563231A
Expired / Lapsed
US
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Electronystagmograph control system
Assignee: Bankers Trust Co
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Filing: 1969-02-19
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Granted: 1971-02-16
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Expires: 1989-02-19
Abstract
Abstract An electronystagmograph including a system for irrigating the subject''s ear with hot or cold water to cause nystagmus, sensors for measuring the potential in the vicinity of the subject''s eyes, 2-channel recording means, and a timing system for controlling a valve in the water supply for establishing the irrigation interval and energizing one recording channel to record the duration of the irrigation interval and, at the end of the irrigation interval, to energize the second channel to record the potential detected by the sensors during a subsequent measuring interval.
Inventors
- 👤 Behrman A Ducote
- 👤 Lawrence V Nicastro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:17
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4863
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
231 words
An electronystagmograph wherein a supply of liquid of predetermined temperature is provided for irrigating the ear of a subject under control of a valve and wherein electrodes adapted to be attached to the subject in the region of the subject''s eyes measures surface potentials produced by movement of the eyes in response to such irrigation, the combination of which comprises: a. a low noise, high-gain amplifier responsive to signals in the range of from about 1-50 c.p.s. connected at its input to said electrodes and having an output channel, b. a recorder having a signal input terminal, c. a first relay having associated therewith a normally opened switch, d. a second relay having associated therewith a normally closed switch, e. an electrical latch system including said normally opened switch and said normally closed switch connected in series between said channel and said signal input terminal, f. precision timer means for actuating said first and second relays at the beginning of a desired irrigation interval and for opening said normally closed switch at the end of said irrigation interval to apply said signals to said recorder during a measuring interval following said irrigation interval, and g. circuit means responsive to said timer means for actuating said valve to initiate flow simultaneously with actuating of said relays and for actuating said valve to terminate said flow simultaneously with deenergization of said second relay.
Claim 2
Dependent Claim
231 words
An electronystagmograph wherein a supply of liquid of predetermined temperature is provided for irrigating the ear of a subject under control of a valve and wherein electrodes adapted to be attached to the subject in the region of the subject''s eyes measures surface potentials produced by movement of the eyes in response to such irrigation, the combination of which comprises: a. a low noise, high-gain amplifier responsive to signals in the range of from about 1-50 c.p.s. connected at its input to said electrodes and having an output channel, b. a recorder having a signal input terminal, c. a first relay having associated therewith a normally opened switch, d. a second relay having associated therewith a normally closed switch, e. an electrical latch system including said normally opened switch and said normally closed switch connected in series between said channel and said signal input terminal, f. precision timer means for actuating said first and second relays at the beginning of a desired irrigation interval and for opening said normally closed switch at the end of said irrigation interval to apply said signals to said recorder during a measuring interval following said irrigation interval, and g. circuit means responsive to said timer means for actuating said valve to initiate flow simultaneously with actuating of said relays and for actuating said valve to terminate said flow simultaneously with deenergization of said second relay.
Claim 3
Dependent Claim
38 words
The combination set forth in claim 1, wherein said supply of liquid includes a warm subsupply and a cold subsupply, and relay means for directing flow of irrigating liquid from said warm subsupply or from said cold subsupply.
Claim 4
Dependent Claim
46 words
The combination set forth in claim 1 when said recorder comprising: a chart recorder, a counter-printer connected in parallel with said chart recorder and wherein a count inhibiting condition is applied to said counter-printer when first relay is deenergized and when said second relay is energized.
Claim 5
Dependent Claim
37 words
The combination set forth in claim 3 wherein: said first relay includes a circuit for applying drive power to said chart recorder for driving said recorder without interruption through both said irrigation interval and said measuring interval.
Claim 6
Dependent Claim
40 words
The combination set forth in claim 1 wherein said recorder is a pulse counter-printer with a repetitive time gate which is short compared with said measuring interval and in which the number of excursions during each time gate is registered.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |