Multi-trace chart recorder

A simple chart recorder which includes a housing, a strip of pressure-markable chart paper in said housing that displays a trace of a first color where a point has been dragged along said chart paper, a marking station in said housing, and a transport in said housing for pulling said strip in a downpath direction slowly past said marking station, characterized by:

• said marking station includes first and second styluses that each press against said pressure-markable chart paper to pressure mark said chart paper, each stylus being separately moveable largely across a width of said chart paper to mark a separate trace on said chart paper;
• said first stylus a quantity of depositable material of a color that is distinctly different from said first color, and a holder that holds said material and presses firmly against said chart paper to pressure mark said chart paper and form a pressure-marked trace, as well as to deposit some of said material beside said pressure-marked trace.

A simple chart recorder which includes a housing, a strip of pressure-markable chart paper in said housing that displays a trace of a first color where a point has been dragged along said chart paper, a marking station in said housing, and a transport in said housing for pulling said strip in a downpath direction slowly past said marking station, characterized by:

• said marking station includes first and second styluses that each press against a portion of said pressure-markable chart paper to pressure mark said chart paper, and first and second stylus moving devices that each move one of said styluses separately from the other in a direction largely across a width of said chart paper portion to mark a separate trace on said chart paper;
• each of said styluses has a tip, and one of said styluses has a tip with a radius of curvature that is at least twice as great as a radius of curvature of the other of said styluses to form a wider pressure-marked trace on said chart paper, said one of said styluses pressing with a force against said chart paper that is at least about twice as great as a force with which the other of said styluses presses.

A simple chart recorder which includes a housing, a strip of pressure-markable chart paper in said housing that displays a trace of a first color where a point has been dragged along said chart paper, a marking station in said housing, and a transport in said housing for pulling said strip in a downpath direction slowly past said marking station, characterized by:

• said marking station includes a first stylus that is constantly biased to press against a portion of said pressure-markable chart paper to pressure mark said chart paper, and a first stylus moving device that moves said first stylus in a direction largely across a width of said chart paper portion to mark a trace on said chart paper;
• a lift mechanism which is coupled to said first stylus, and which moves the stylus repeatedly off and back against said chart paper to produce a dashed trace consisting of a series of dashes;
• said lift mechanism includes a wheel that is rotatable about a first axis and which bears against said chart paper so as said chart paper slowly moves said wheel slowly rotates, said wheel having at least one raised lifter portion, and including a coupling that extends between said stylus and said lifter wheel, so as said wheel and lifter portion rotate said stylus is repeatedly raised and lowered.