Abstract: An electrode connector and connector condition sensor for a biopotential sensing apparatus wherein a plurality of electrodes are connected to individual output leads for individual electrode channels by a connector which does not abrade the surface of the electrode button contact and does not require that pressure be applied to the electrode during connection. Two spring biased conductive arms for the connector are spread apart by the cam surface of an actuator button to receive the button contact and are contoured to engage substantially the entire peripheral surface of the button contact when the actuator button is released. The biopotential sensing apparatus includes a processor which senses the loss of signal in any electrode channel during a test period and activates an indicator to provide a warning indication.

Abstract: A DC biopotential sensing electrode assembly is provided for an apparatus for sensing DC biopotentials present at the skin of a subject. An electroconductive medium for transmitting ions from the skin which has a chloride ion content within a range of from 6-15 grams per hundred grams of such medium is formulated for use with the electrode. To reduce the corrosive effect of this electroconductive medium, each electrode includes only one metallic component, and to provide an electrode with a low AC impedance, this metal is uniformly coated upon nonmetallic sensor and terminal bodies with a coating thickness within a range of from 0.5 to 1.5 mil. To insure a complete electrical path through both the sensor and the terminal bodies, the nonmetallic portions are formed of conductive plastic.

Abstract: A method and apparatus for screening or sensing disease states, injury sites or bodily conditions in a human or animal subject by separately detecting the DC biopotential of the electromagnetic field at a plurality of test points in a test area. The DC biopotentials are converted by analog to digital converters connected to DC biopotential test sensors at the test points into digital test signals, and the DC biopotential test sensors and analog to digital converters form a biopotential sensing section which is separate from a processing section that receives and processes the digital test signals. Signals between the processing section and the bopotential sensing section are transmitted by a transmission network which electrically isolates the two sections.

Abstract: A DC biopotential sensing electrode assembly is provided for an apparatus for sensing DC biopotentials present at the skin of a subject. The electrodes include an electroconductive medium for transmitting ions from the skin which has a chloride content within a range of from 6-15 grams per hundred grams of such medium. To reduce the corrosive effect of this electroconductive medium, each electrode includes only one metallic component, and to provide an electrode with a low AC impedance, this metal is uniformly coated upon nonmetallic sensor and terminal bodies with a coating thickness within a range of from 0.5 to 1.5 mil. To insure a complete electrical path through both the sensor and the terminal bodies, the nonmetallic portions are formed of conductive plastic.