US3750650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double spiral electrode for intra-cavity attachment
Assignee: Hewlett Packard GmbH Germany
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Filing: 1971-12-13
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Granted: 1973-08-07
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Expires: 1991-12-13
Abstract
Abstract An electrode device is configured for mounting at or within parts of the human body, especially for obtaining ECG signals from a fetus. The electrode device includes two spiral pointed catcher elements displaced by 180* which are mounted in an insulating carrier. A counter electrode in the form of a tubular metal guiding element surrounds the carrier and protects the vagina and the fetus when the pointed catcher elements are introduced. A cannula may be provided at the electrode device so that liquid medicine or an electrolyte can be supplied to the fetus simultaneously with measuring ECG signals. The electrode device is introduced into the vagina by means of a guiding element.
Inventors
- 👤 H Ruttgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:16
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/43; A61B5/4306; A61B5/4343; A61B5/4362; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/288
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A measuring head assembly for obtaining measuring signals from cavities of the human body comprising: a spiral catcher electrode having two arms with pointed ends being displaced by 180* relative to each other; a carrier formed of an insulating material surrounding a portion of the catcher electrode; an electrically conductive member extending from the carrier in a fixed spatial relation with the catcher electrode, the conductive member being operable as a counter electrode with the catcher electrode; a pair of electrical signal leads connected respectively to the catcher electrode and the conductive member; and a guiding tube having an end portion of a predetermined configuration for receiving and holding the carrier by engaging the conducting member extending from thE carrier, thereby enabling the carrier to be detachably mounted in the guiding tube.
Claim 2
Dependent Claim
132 words
A measuring head assembly for obtaining measuring signals from cavities of the human body comprising: a spiral catcher electrode having two arms with pointed ends being displaced by 180* relative to each other; a carrier formed of an insulating material surrounding a portion of the catcher electrode; an electrically conductive member extending from the carrier in a fixed spatial relation with the catcher electrode, the conductive member being operable as a counter electrode with the catcher electrode; a pair of electrical signal leads connected respectively to the catcher electrode and the conductive member; and a guiding tube having an end portion of a predetermined configuration for receiving and holding the carrier by engaging the conducting member extending from thE carrier, thereby enabling the carrier to be detachably mounted in the guiding tube.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 including a cannula having a pointed end extending centrally from the carrier between the spiral arms of the catcher electrode.
Claim 4
Dependent Claim
18 words
The apparatus of claim 2 wherein the length of the pointed end extending from the carrier is adjustable.
Claim 5
Dependent Claim
19 words
The apparatus of claim 1 wherein at least one of the arms of the catcher electrode is a cannula.
References Cited (Backward Citations)
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |