Graticule with cursors

In a graphical recorded display system for obtaining a record of at least one electrical signal such as one corresponding to at least one vital sign of a patient, a scribing surface medium, scribing means, means for advancing said recording surface medium relative to said scribing means, said scribing means scribing on said scribing surface medium in scribing directions generally transverse to the direction of said advance of said scribing medium relative to said scribing means, means for sensing said at least one of said electrical signal and providing corresponding responsive electrical signals therefor, the improvement comprising:

• means for generating time-incremented electrical signals for extension to said scribing means for scribing a graticule on said scribing surface medium, said graticule being graduated in the direction of said relative advance between said scribing means and said scribing surface medium;
• means for extending said time-incremented electrical signals to said scribing means during a predetermined period for scribing said graticule;
• means providing at least one electrical control signal respectively representative of the value of a respective parameter of a said electrical signal measured during a predetermined period of time, said at least one parameter value control signal having a particular time relationship with said graticule signals determined by said value of said parameter;
• means selectively extendible to said scribing means for scribing a cursor on said scribing surface medium;
• and
• means responsive to said at least one parameter value signal for extending said cursor scribing means to said scribing means during said graticule scribing period to scribe a respective cursor on said scribing surface medium in timed relation to said graticule, thereby to indicate the value of said at least one respective parameter.