Abstract: A water filtration system uses previously used medical filters, such as dialysis filters, for water purification. After medical use the filters are cleaned and sterilized and mounted singly or in groups so as to receive input water under pressure. The system produces sterile filtered water.

Abstract: A water filtration system uses previously used medical filters, such as dialysis filters, for water purification. After medical use the filters are cleaned and sterilized and mounted singly or in groups so as to receive input water under pressure. The system produces sterile filtered water.

Abstract: A water filtration system uses previously used medical filters, such as dialysis filters, for water purification. After medical use the filters are cleaned and sterilized and mounted singly or in groups so as to receive input water under pressure. The system produces sterile filtered water.

Abstract: Signal processing apparatus particularly useful in electrocardiograph equipment comprises a conventional ECG amplifier channel, a high-gain ECG amplifier channel, signal averaging means, and a control panel enabling the manual selection, for inputting into the signal averaging means and outputting to the electrocardiograph, either the ECG signals from the conventional amplifier or those from the high-gain amplifier. The high-gain amplifier further includes a passive filter for removing the low-frequency components. According to another feature, the signal averaging means inlcudes a digital microcomputer providing time-base expansion; and according to a still further feature, the apparatus includes a further amplifier producing trigger pulses to the signal averaging means for triggering same, thereby enabling an optimum electrode configuration to be selected producing optimum triggering.

Abstract: Electrocardiograph apparatus capable of discerning the H-wave in the P-Q interval of an ECG signal comprises a charge transfer device delaying the ECG signal and a signal averager circuit triggerable by an R-wave peak detector for summing a plurality of the delayed ECG signals in time-locked relationship to the detected R-wave peak.