Monitor method and apparatus for physiological signals and the like

Claim 3

A method as claimed in claim 1 and in which the further step is performed of temporarily suspending the updating of said storing to freeze the display.

Claim 6

Monitor apparatus for producing a televisionlike display of time-sequentially occurring signals having, in combination, means for receiving said signals, means for converting the signals into digital representations thereof, means connected with said converting means for storing said digital representations in predetermined positional sequence, means connected with the storing means for reconverting the stored digital representations into corresponding analog signals, memory circuit means provided with an input and an output with the input connected to said reconverting means for storing the said analog signals, televisionlike display means, and means for connecting said memory circuit means output to said display means.

Claim 7

Monitor apparatus for producing a televisionlike display of time-sequentially occurring signals having, in combination, means for receiving said signals, means for converting the signals into digital representations thereof, means connected with said converting means for storing said digital representations in predetermined positional sequence, means connected with the storing means for reconverting the stored digital representations into corresponding analog signals, memory circuit means provided with an input and an output with the input connected to said reconverting means for storing the said analog signals, televisionlike display means, and means for connecting said memory circuit means output to said display means.

Claim 8

Monitor apparatus as claimed in claim 4 and in which there is interposed between said memory circuit means and said display means voltage comparator and video signal generator means.

Claim 9

Monitor apparatus as claimed in claim 4, and in which the receiving means comprises means for applying a plurality of separate signals along a plurality of channels, and said converting means comprises means for selecting signals from the plurality of channels in sequential order.

Claim 10

Monitor apparatus as claimed in claim 6, and in which said memory circuit means comprises a plurality of holding circuits, one corresponding to each of the signals to be displayed, and provided with means for enabling the successive holding circuits to store only the reconverted analog signals of the corresponding channel.

Claim 11

Monitor apparatus as claimed in claim 4, and in which the said storing means continually stores sets of said digital representations corresponding to signals occurring over a time interval in an updated fashion always ending with present time, and in which means is provided for controlling the said display means to display the reconverted analog signals on a sweep of duration short compared to the said time interval.

Claim 12

Monitor apparatus as claimed in claim 8, and in which said storing means comprises a memory input selector connected to delay-line means.

Claim 13

Monitor apparatus as claimed in claim 9, and in which merge control means is connected between the converting means and said memory input selector, and shift register and freeze control means are connected between said delay-line means and said reconverting means, with a feedback path connected between said freeze control means and said memory input selector to recirculate delayed stored digital representations to the selector.

Claim 14

Monitor apparatus as claimed in claim 10 and in which said reconverting means comprises a digital-to-analog converter and in which there is provided between said freeze control means and said reconverting means a D-register connected with an output register input selector and a pair of paths respectively containing a P-register and a PP-register feeding an output register selector.

Claim 15

Monitor apparatus as claimed in claim 8, and in which one of the memory circuit means is connected to one of the display means to display the reconverted analog signals of a plurality of channels.

Claim 16

Monitor apparatus as claimed in claim 4 and in which there is interposed between said memory circuit means and said display means voltage comparator means operated with ramp generator means, and video signal generator means.

Claim 17

Monitor apparatus as claimed in claim 8, and in which means is provided, operable following display of a signal upon the display means, for extracting said signal in one of digital and analog forms.

Claim 18

Monitor apparatus as claimed in claim 14 and in which there is provided means comprising pen control and memory means for recording a selected displayed signal.

Claim 19

MonitoR apparatus as claimed in claim 14 and in which said last-named means is actuated by alarm means.

Claim 20

Monitor apparatus as claimed in claim 8, and in which means is provided, operable upon display of a signal, for freezing said signal upon the display means.