Control apparatus for a double-string Einthoven galvanometer
W H H Gibson · Journal of Scientific Instruments · 1934
The apparatus described has been developed for the purpose of increasing the utility of a double-string Einthoven galvanometer for general laboratory use. It contains all switchgear required for the calibration and the use of the galvanometer, as well as for various auxiliary apparatus, such as the time-marker and a remote-control camera release. The switches for the galvanometer circuits are interlocked to protect the instrument from damage through errors in manipulation, and thus also to permit more rapid handling.