US4448199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for detecting bioelectrical signals
Assignee: Individual
•
Filing: 1982-02-24
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Granted: 1984-05-15
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Expires: 2002-02-24
Abstract
Abstract An electrode arrangement for bioelectric signals, especially for EKG measurements comprises at least one electrode element in which the material in contact with the skin includes a p-n semi-conductor. Preferably the test electrode and a reference or neutral electrode are joined in a single unit in relatively close proximity.
Inventors
- 👤 Walter Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:15
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/024; A61B5/02438; A61B5/24; A61B5/316; A61B5/318; A61B5/332; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0217; A61B5/25; A61B5/279; A61B5/28; A61B5/282
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
An electric assembly for skin-contacting bioelectrical purposes, comprising: a support; a pair of electrodes mounted on and insulated from one another by said support, said electrodes having side-by-side contact surfaces adapted to rest directly against the skin, terminals enabling electrical connection to the respective electrodes and means forming a respective p-n junction poled in the same direction as the p-n junction of the other electrode with respect to the skin between each contact surface and the respective terminal, each such means including a plate of p-conductive semiconductive material lying against a plate of n-conductive semiconductive material, said plates being parallel to the respective contact surface; and means for connecting said terminals of said electrodes to a device for monitoring bioelectric signals traversing said p-n junctions from the skin.
Claim 2
Dependent Claim
128 words
An electric assembly for skin-contacting bioelectrical purposes, comprising: a support; a pair of electrodes mounted on and insulated from one another by said support, said electrodes having side-by-side contact surfaces adapted to rest directly against the skin, terminals enabling electrical connection to the respective electrodes and means forming a respective p-n junction poled in the same direction as the p-n junction of the other electrode with respect to the skin between each contact surface and the respective terminal, each such means including a plate of p-conductive semiconductive material lying against a plate of n-conductive semiconductive material, said plates being parallel to the respective contact surface; and means for connecting said terminals of said electrodes to a device for monitoring bioelectric signals traversing said p-n junctions from the skin.
Claim 3
Dependent Claim
47 words
The assembly defined in claim 1 wherein said electrodes are formed predominantly and apart from the respective p-n junctions of an alloy consisting in major parts of a noble metal and in minor parts of at least one iron-group metal, at least one semiconductor element, and graphite.
Claim 4
Dependent Claim
67 words
The assembly defined in claim 2 wherein each of said electrodes has a body consisting essentially of 52 to 62% by weight of at least one noble metal, 3 to 6% by weight of at least one semiconductor element, about 2 to about 3% by weight graphite and from trace amounts to about 2% by weight of an iron-group metal, the balance being conductive alloy forming elements.
Claim 5
Dependent Claim
44 words
The assembly defined in claim 1 wherein said support is provided with a wristband to enable the same to be fixed to the wrist of a person, said support being provided with a heartbeat frequency meter connected to said electrodes by said connecting means.
Claim 6
Dependent Claim
27 words
The assembly defined in claim 4 wherein said support is composed at least in part of elastically deformable material yieldable to permit resilient displacement of said electrodes.
Claim 7
Dependent Claim
25 words
The assembly defined in claim 4, further comprising spring means between said support and said electrodes for yieldably retaining said contact surfaces against the skin.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |