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Complex German analogue computer

circa 1940
A699B bearing plotter. A/S 174 year 1942

Bearing plotter

X-Y Plotter by EKCO; type E 193.

X-Y Plotter by EKCO; type E 193.

1960-1970
Large (drawing area 380 x 250 mm) flat bed X-Y plotter made by Bryant used at the Burden Neurological Institute. The pen is mounted on orthogonal axes and can be used with an internal time base as a Y-T plotter or as an X-Y plotter with external wave forms on both inputs (cf Lissajou's figures).

Large flat bed X-Y plotter

1965-1970
Watanabe Instrument Corp model WX4771 Digi-Plot Flatbed A3 Plotter, s/n 11803

Watanabe Instrument Corp model WX4771 Digi-Plot Flatbed A3 Plotter

1980-1985