Rotational planar chart recorder and chart therefor

Details Rotational planar chart recorder and chart therefor Rotational planar chart recorder and chart therefor

G - Physics

01

D

234/28

G01D 9/10 (2006.01) G01D 9/30 (2006.01)

Patent

CA 1306452

ROTATIONAL PLANAR CHART RECORDER AND CHART THEREFOR Abstract of the Disclosure A chart recorder is described for recording para- meters such as temperature and humidity on rotating planar charts. Pens, which are used to form traces on a chart as this is rotated, are moved by pen actuators along travel paths that are parallel to a straight radius relative to the axis of chart rotation. The pen actuators are electrically moved under the control of a microprocessor to positions as determined by representa- tive of parameter values. Various mechanical and elec- trical control features are described whereby pen mo- tions are caused intermittently so as to preserve bat- tery power and achieve long term portable-operation.

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