Collector controller for chromatograph

Abstract From the Canadian patent

An electro-mechanical controller for a fraction collector for a liquid chromatograph in which a conventional strip Chart recorder pen holder guide rail is provided with a slider which is pulled along by a contact bar mounted on the pen holder or pushed by the pen holder depending on the direction of travel. The L-bar and pen holder are electrically interconnected to sense the travel of the pen holder and generate an output signal which triggers a timer the output signal, of which fires a one-shot integrated circuit the output signal of which in turn fires a free running timer and time delay circuit to permit time for the solution of the detected peak to travel from the detector to the …