Abstract: A portable strip chart recorder includes a programmable electronic drive circuit to drive an electric motor and a means for identifying the strip chart as having been recorded on a specific recorder, said strip chart incorporating graphic means of identifying the time interval programmed by the electronic drive circuit with points for identifying which specific time interval has been selected. The case of the recorder consisting of a base and a top having a self-locking hatch. The hatch in the top provides access for the operator to actuate electric switches which program the drive circuit to move the strip chart at a selected rate versus time. The surface over which the strip chart moves has an identifying number, or symbol, which can be reproduced on the chart by applying friction or heat. The hatch in the top of the case in self-locking and when closed operates an electric switch to close the battery-operated circuit.

Abstract: A device is provided for recording written information dealing with the care of a patient. Each additional entry advances the previous entry and records it as a permanent record on the same tape roll. Each earlier entry is thereby hidden from view, thus preventing the alteration of records.